-/* $Id: glu.h,v 1.21 2000/05/22 19:40:43 brianp Exp $ */
+/* $Id: glu.h,v 1.22 2000/07/11 14:11:44 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
- *
- * Copyright (C) 1995-1999 Brian Paul
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*/
-#ifndef __glu_h__
-#define __glu_h__
+#ifndef GLU_H
+#define GLU_H
#if defined(USE_MGL_NAMESPACE)
#include "glu_mangle.h"
#endif
-#include "GL/gl.h"
-
#ifdef __cplusplus
extern "C" {
#endif
+#include <GL/gl.h>
+
+
/* to facilitate clean DLL building ... */
#if !defined(OPENSTEP) && (defined(__WIN32__) || defined(__CYGWIN__))
# if defined(_MSC_VER) && defined(BUILD_GLU32) /* tag specify we're building mesa as a DLL */
#endif
-
#ifdef macintosh
#pragma enumsalwaysint on
#if PRAGMA_IMPORT_SUPPORTED
#define GLU_VERSION_1_1 1
-#define GLU_VERSION_1_2 1
+
#define GLU_TRUE 1
#define GLU_EXTENSIONS 100801
-
-/*** GLU 1.0 tessellation - obsolete! ***/
+/*** GLU 1.0 tessellation ***/
/* Contour types */
#define GLU_CW 100120
#define GLU_EDGE_FLAG GLU_TESS_EDGE_FLAG
-/*
- * These are the GLU 1.1 typedefs. GLU 1.3 has different ones!
- */
+
#if defined(__BEOS__)
/* The BeOS does something funky and makes these typedefs in one
* of its system headers.
*/
#else
+
+#if defined GLU_VERSION_1_2
typedef struct GLUquadric GLUquadricObj;
typedef struct GLUnurbs GLUnurbsObj;
-
/* FIXME: We need to implement the other 1.3 typedefs - GH */
typedef struct GLUtesselator GLUtesselator;
typedef GLUtesselator GLUtriangulatorObj;
+#else
+ /* GLU 1.1 and older */
+ typedef struct GLUquadric GLUquadricObj;
+ typedef struct GLUtriangulatorObj GLUtriangulatorObj;
+ typedef struct GLUnurbs GLUnurbsObj;
+#endif
+
#endif
*/
GLUAPI GLint GLAPIENTRY gluScaleImage( GLenum format,
- GLint widthin, GLint heightin,
+ GLsizei widthin, GLsizei heightin,
GLenum typein, const void *datain,
- GLint widthout, GLint heightout,
+ GLsizei widthout, GLsizei heightout,
GLenum typeout, void *dataout );
GLUAPI GLint GLAPIENTRY gluBuild1DMipmaps( GLenum target, GLint components,
- GLint width, GLenum format,
+ GLsizei width, GLenum format,
GLenum type, const void *data );
GLUAPI GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
- GLint width, GLint height,
+ GLsizei width, GLsizei height,
GLenum format,
GLenum type, const void *data );
GLint slices, GLint stacks );
GLUAPI void GLAPIENTRY gluSphere( GLUquadricObj *qobj,
- GLdouble radius, GLint slices,
- GLint stacks );
+ GLdouble radius,
+ GLint slices, GLint stacks );
GLUAPI void GLAPIENTRY gluDisk( GLUquadricObj *qobj,
GLdouble innerRadius, GLdouble outerRadius,
GLint slices, GLint loops );
-GLUAPI void GLAPIENTRY gluPartialDisk( GLUquadricObj *qobj, GLdouble innerRadius,
+GLUAPI void GLAPIENTRY gluPartialDisk( GLUquadricObj *qobj,
+ GLdouble innerRadius,
GLdouble outerRadius, GLint slices,
GLint loops, GLdouble startAngle,
GLdouble sweepAngle );
GLUAPI void GLAPIENTRY gluEndTrim( GLUnurbsObj *nobj );
GLUAPI void GLAPIENTRY gluPwlCurve( GLUnurbsObj *nobj, GLint count,
- GLfloat *array, GLint stride,
- GLenum type );
+ GLfloat *array,
+ GLint stride, GLenum type );
GLUAPI void GLAPIENTRY gluNurbsCallback( GLUnurbsObj *nobj, GLenum which,
void (GLCALLBACK *fn)() );
*
*/
+#ifdef GLU_VERSION_1_2
+
GLUAPI GLUtesselator* GLAPIENTRY gluNewTess( void );
GLUAPI void GLAPIENTRY gluDeleteTess( GLUtesselator *tobj );
GLUAPI void GLAPIENTRY gluGetTessProperty( GLUtesselator *tobj, GLenum which,
GLdouble *value );
-/*
- *
- * Obsolete 1.0 tessellation functions
- *
- */
+#else
+
+GLUAPI GLUtriangulatorObj* GLAPIENTRY gluNewTess( void );
-GLUAPI void GLAPIENTRY gluBeginPolygon( GLUtesselator *tobj );
+GLUAPI void GLAPIENTRY gluTessCallback( GLUtriangulatorObj *tobj, GLenum which,
+ void (GLCALLBACK *fn)() );
-GLUAPI void GLAPIENTRY gluNextContour( GLUtesselator *tobj, GLenum type );
+GLUAPI void GLAPIENTRY gluDeleteTess( GLUtriangulatorObj *tobj );
+
+GLUAPI void GLAPIENTRY gluBeginPolygon( GLUtriangulatorObj *tobj );
+
+GLUAPI void GLAPIENTRY gluEndPolygon( GLUtriangulatorObj *tobj );
+
+GLUAPI void GLAPIENTRY gluNextContour( GLUtriangulatorObj *tobj, GLenum type );
+
+GLUAPI void GLAPIENTRY gluTessVertex( GLUtriangulatorObj *tobj, GLdouble v[3],
+ void *data );
+
+#endif
-GLUAPI void GLAPIENTRY gluEndPolygon( GLUtesselator *tobj );
*
*/
-GLUAPI GLboolean GLAPIENTRY
-gluCheckExtension(const char *extName, const GLubyte *extString);
-
-
-GLUAPI GLint GLAPIENTRY
-gluBuild3DMipmaps( GLenum target, GLint internalFormat, GLsizei width,
- GLsizei height, GLsizei depth, GLenum format,
- GLenum type, const void *data );
-
-GLUAPI GLint GLAPIENTRY
-gluBuild1DMipmapLevels( GLenum target, GLint internalFormat, GLsizei width,
- GLenum format, GLenum type, GLint level, GLint base,
- GLint max, const void *data );
+#ifdef GLU_VERSION_1_3
-GLUAPI GLint GLAPIENTRY
-gluBuild2DMipmapLevels( GLenum target, GLint internalFormat, GLsizei width,
- GLsizei height, GLenum format, GLenum type,
- GLint level, GLint base, GLint max,
- const void *data );
-
-GLUAPI GLint GLAPIENTRY
-gluBuild3DMipmapLevels( GLenum target, GLint internalFormat, GLsizei width,
- GLsizei height, GLsizei depth, GLenum format,
- GLenum type, GLint level, GLint base, GLint max,
- const void *data );
+GLUAPI GLboolean GLAPIENTRY
+gluCheckExtension( const char *extName, const GLubyte *extString );
-GLUAPI GLint GLAPIENTRY
-gluUnProject4( GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
- const GLdouble modelMatrix[16], const GLdouble projMatrix[16],
- const GLint viewport[4], GLclampd zNear, GLclampd zFar,
- GLdouble *objx, GLdouble *objy, GLdouble *objz,
- GLdouble *objw );
+#endif
#endif
-#endif /* __glu_h__ */
+#endif
# Tinic Uro <5uro@informatik.uni-hamburg.de>
# Mesa 3-D graphics library
-# Version: 2.6
-# Copyright (C) 1995-1997 Brian Paul
+# Version: 3.3
+# Copyright (C) 1995-2000 Brian Paul
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
LIBDIR = ../lib
SOURCES = glu.c mipmap.c nurbs.c nurbscrv.c nurbssrf.c nurbsutl.c \
- project.c quadric.c tess.c tess_fist.c tess_hash.c tess_heap.c \
- tess_winding.c tess_clip.c
+ polytest.c project.c quadric.c tess.c tesselat.c
OBJECTS = $(SOURCES:.c=.o)
+# $Id: Makefile.BeOS-R4,v 1.7 2000/07/11 14:11:04 brianp Exp $
# Makefile for GLU for BeOS R4
# Mesa 3-D graphics library
-# Version: 3.1
-# Copyright (C) 1995-1999 Brian Paul
+# Version: 3.3
+# Copyright (C) 1995-2000 Brian Paul
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public
# Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-# $Id: Makefile.BeOS-R4,v 1.6 1999/12/06 09:39:34 gareth Exp $
-
-# $Log: Makefile.BeOS-R4,v $
-# Revision 1.6 1999/12/06 09:39:34 gareth
-# Merging in work from 3.1/3.2 branch. Tessellator is essentially fully
-# functional now.
-#
-# Revision 1.5 1999/10/03 00:53:38 gareth
-# Added tessellation winding rule files.
-#
-# Revision 1.4 1999/09/17 00:06:57 brianp
-# version symbol changes
-#
-# Revision 1.3 1999/09/15 15:11:01 brianp
-# added third, tiny version number to mklib scripts
-#
-# Revision 1.2 1999/09/10 02:03:31 gareth
-# Added GLU 1.3 tessellation (except winding rule code).
-#
-# Revision 1.1.1.1 1999/08/19 00:55:42 jtg
-# Imported sources
-#
-# Revision 1.2 1999/02/02 04:44:40 brianp
-# fixed some problems
-#
-# Revision 1.1 1999/01/19 04:10:02 brianp
-# Initial revision
-#
-
-
##### MACROS #####
GLU_MAJOR = 1
-GLU_MINOR = 2
+GLU_MINOR = 1
GLU_TINY = $(MESA_MAJOR)$(MESA_MINOR)$(MESA_TINY)
VPATH = RCS
LIBDIR = ../lib
SOURCES = glu.c mipmap.c nurbs.c nurbscrv.c nurbssrf.c nurbsutl.c \
- project.c quadric.c tess.c tess_fist.c tess_hash.c tess_heap.c \
- tess_winding.c tess_clip.c
+ polytest.c project.c quadric.c tess.c tesselat.c
OBJECTS = $(SOURCES:.c=.o)
-# $Id: Makefile.X11,v 1.7 1999/12/06 09:39:34 gareth Exp $
+# $Id: Makefile.X11,v 1.8 2000/07/11 14:11:04 brianp Exp $
# Mesa 3-D graphics library
-# Version: 3.1
-# Copyright (C) 1995-1999 Brian Paul
+# Version: 3.3
+# Copyright (C) 1995-2000 Brian Paul
# Makefile for GLU library
##### MACROS #####
GLU_MAJOR = 1
-GLU_MINOR = 2
+GLU_MINOR = 1
GLU_TINY = 0$(MESA_MAJOR)0$(MESA_MINOR)0$(MESA_TINY)
VPATH = RCS
LIBDIR = ../lib
SOURCES = glu.c mipmap.c nurbs.c nurbscrv.c nurbssrf.c nurbsutl.c \
- project.c quadric.c tess.c tess_fist.c tess_hash.c tess_heap.c \
- tess_winding.c tess_clip.c
+ polytest.c project.c quadric.c tess.c tesselat.c
OBJECTS = $(SOURCES:.c=.o)
LIBDIR = ../lib\r
\r
SOURCES = glu.c mipmap.c nurbs.c nurbscrv.c nurbssrf.c nurbsutl.c \\r
- project.c quadric.c tess.c tess_fist.c tess_hash.c tess_heap.c \\r
- tess_winding.c tess_clip.c\r
+ polytest.c project.c quadric.c tess.c tesselat.c\r
\r
OBJECTS = $(SOURCES:.c=.o)\r
\r
-/* $Id: all.h,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
+/* $Id: all.h,v 1.2 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 2.3
- * Copyright (C) 1995-1997 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: all.h,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.2 1997/11/20 00:28:20 brianp
- * changed PCH to PC_HEADER
- *
- * Revision 1.1 1997/05/28 02:29:14 brianp
- * Initial revision
- *
- */
-
-
-/*
* This file includes all .h files needed for the GLU source code for
* the purpose of precompiled headers.
*
#ifndef PC_HEADER
- This is an error. all.h should be included only if PCH is defined.
+This is an error. all.h should be included only if PCH is defined.
#endif
#include "tess.h"
-#endif /*GLU_ALL_H*/
+#endif /*GLU_ALL_H */
-/* $Id: glu.c,v 1.19 2000/01/07 07:22:48 brianp Exp $ */
+/* $Id: glu.c,v 1.20 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
- * Copyright (C) 1999-2000 Brian Paul
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*/
-/*
- * $Log: glu.c,v $
- * Revision 1.19 2000/01/07 07:22:48 brianp
- * updated version string
- *
- * Revision 1.18 1999/11/22 22:15:50 brianp
- * removed GLU_EXT_get_proc_address from ext strings
- *
- * Revision 1.17 1999/11/19 21:23:37 brianp
- * replace encounteed with encountered
- *
- * Revision 1.16 1999/10/27 09:47:41 brianp
- * disabled gluGetProcAddressEXT
- *
- * Revision 1.15 1999/09/19 02:03:19 tjump
- * More Win32 build compliance fixups
- *
- * Revision 1.14 1999/09/17 12:21:53 brianp
- * glGetProcAddressEXT changes to accomodate Win32 and non-Win32
- *
- * Revision 1.13 1999/09/17 03:17:18 tjump
- * Patch error fixup
- *
- * Revision 1.12 1999/09/17 03:07:28 tjump
- * Win32 build req't updates
- *
- * Revision 1.11 1999/09/17 01:00:38 brianp
- * fixed typo
- *
- * Revision 1.10 1999/09/17 00:06:14 brianp
- * gluGetProcAddressEXT change for C++ / BeOS
- *
- * Revision 1.9 1999/09/16 22:37:56 brianp
- * added some casts in gluGetProcAddressEXT()
- *
- * Revision 1.8 1999/09/16 16:53:28 brianp
- * clean-up of GLU_EXT_get_proc_address
- *
- * Revision 1.7 1999/09/14 00:11:40 brianp
- * added gluCheckExtension()
- *
- * Revision 1.6 1999/09/13 14:31:32 joukj
- *
- * strcmp needs the string.h
- *
- * Revision 1.5 1999/09/11 12:04:54 brianp
- * added 1.2 function to gluGetProcAddressEXT()
- *
- * Revision 1.4 1999/09/11 11:36:26 brianp
- * added GLU_EXT_get_proc_address
- *
- * Revision 1.3 1999/09/10 04:32:10 gareth
- * Fixed triangle output, recovery process termination.
- *
- * Revision 1.2 1999/09/10 02:03:31 gareth
- * Added GLU 1.3 tessellation (except winding rule code).
- *
- * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
- * Imported sources
- *
- * Revision 1.13 1999/03/31 19:07:28 brianp
- * added GL_EXT_abgr to extensions
- *
- * Revision 1.12 1999/02/06 06:12:41 brianp
- * updated version string to 3.1
- *
- * Revision 1.11 1999/01/03 03:23:15 brianp
- * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
- *
- * Revision 1.10 1998/04/22 00:35:50 brianp
- * changed version to 3.0
- *
- * Revision 1.9 1997/12/09 03:03:32 brianp
- * changed version to 2.6
- *
- * Revision 1.8 1997/10/04 01:30:20 brianp
- * changed version to 2.5
- *
- * Revision 1.7 1997/08/13 01:25:21 brianp
- * changed version string to 2.4
- *
- * Revision 1.6 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.5 1997/07/13 22:59:11 brianp
- * added const to viewport parameter of gluPickMatrix()
- *
- * Revision 1.4 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.3 1997/04/12 16:19:02 brianp
- * changed version to 2.3
- *
- * Revision 1.2 1997/03/11 00:58:34 brianp
- * changed version to 2.2
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
#ifdef PC_HEADER
#include "all.h"
#else
-void GLAPIENTRY gluLookAt( GLdouble eyex, GLdouble eyey, GLdouble eyez,
- GLdouble centerx, GLdouble centery, GLdouble centerz,
- GLdouble upx, GLdouble upy, GLdouble upz )
+void GLAPIENTRY
+gluLookAt(GLdouble eyex, GLdouble eyey, GLdouble eyez,
+ GLdouble centerx, GLdouble centery, GLdouble centerz,
+ GLdouble upx, GLdouble upy, GLdouble upz)
{
GLdouble m[16];
GLdouble x[3], y[3], z[3];
z[0] = eyex - centerx;
z[1] = eyey - centery;
z[2] = eyez - centerz;
- mag = sqrt( z[0]*z[0] + z[1]*z[1] + z[2]*z[2] );
- if (mag) { /* mpichler, 19950515 */
+ mag = sqrt(z[0] * z[0] + z[1] * z[1] + z[2] * z[2]);
+ if (mag) { /* mpichler, 19950515 */
z[0] /= mag;
z[1] /= mag;
z[2] /= mag;
y[2] = upz;
/* X vector = Y cross Z */
- x[0] = y[1]*z[2] - y[2]*z[1];
- x[1] = -y[0]*z[2] + y[2]*z[0];
- x[2] = y[0]*z[1] - y[1]*z[0];
+ x[0] = y[1] * z[2] - y[2] * z[1];
+ x[1] = -y[0] * z[2] + y[2] * z[0];
+ x[2] = y[0] * z[1] - y[1] * z[0];
/* Recompute Y = Z cross X */
- y[0] = z[1]*x[2] - z[2]*x[1];
- y[1] = -z[0]*x[2] + z[2]*x[0];
- y[2] = z[0]*x[1] - z[1]*x[0];
+ y[0] = z[1] * x[2] - z[2] * x[1];
+ y[1] = -z[0] * x[2] + z[2] * x[0];
+ y[2] = z[0] * x[1] - z[1] * x[0];
/* mpichler, 19950515 */
/* cross product gives area of parallelogram, which is < 1.0 for
* non-perpendicular unit-length vectors; so normalize x, y here
*/
- mag = sqrt( x[0]*x[0] + x[1]*x[1] + x[2]*x[2] );
+ mag = sqrt(x[0] * x[0] + x[1] * x[1] + x[2] * x[2]);
if (mag) {
x[0] /= mag;
x[1] /= mag;
x[2] /= mag;
}
- mag = sqrt( y[0]*y[0] + y[1]*y[1] + y[2]*y[2] );
+ mag = sqrt(y[0] * y[0] + y[1] * y[1] + y[2] * y[2]);
if (mag) {
y[0] /= mag;
y[1] /= mag;
}
#define M(row,col) m[col*4+row]
- M(0,0) = x[0]; M(0,1) = x[1]; M(0,2) = x[2]; M(0,3) = 0.0;
- M(1,0) = y[0]; M(1,1) = y[1]; M(1,2) = y[2]; M(1,3) = 0.0;
- M(2,0) = z[0]; M(2,1) = z[1]; M(2,2) = z[2]; M(2,3) = 0.0;
- M(3,0) = 0.0; M(3,1) = 0.0; M(3,2) = 0.0; M(3,3) = 1.0;
+ M(0, 0) = x[0];
+ M(0, 1) = x[1];
+ M(0, 2) = x[2];
+ M(0, 3) = 0.0;
+ M(1, 0) = y[0];
+ M(1, 1) = y[1];
+ M(1, 2) = y[2];
+ M(1, 3) = 0.0;
+ M(2, 0) = z[0];
+ M(2, 1) = z[1];
+ M(2, 2) = z[2];
+ M(2, 3) = 0.0;
+ M(3, 0) = 0.0;
+ M(3, 1) = 0.0;
+ M(3, 2) = 0.0;
+ M(3, 3) = 1.0;
#undef M
- glMultMatrixd( m );
+ glMultMatrixd(m);
/* Translate Eye to Origin */
- glTranslated( -eyex, -eyey, -eyez );
+ glTranslated(-eyex, -eyey, -eyez);
}
-void GLAPIENTRY gluOrtho2D( GLdouble left, GLdouble right,
- GLdouble bottom, GLdouble top )
+void GLAPIENTRY
+gluOrtho2D(GLdouble left, GLdouble right, GLdouble bottom, GLdouble top)
{
- glOrtho( left, right, bottom, top, -1.0, 1.0 );
+ glOrtho(left, right, bottom, top, -1.0, 1.0);
}
-void GLAPIENTRY gluPerspective( GLdouble fovy, GLdouble aspect,
- GLdouble zNear, GLdouble zFar )
+void GLAPIENTRY
+gluPerspective(GLdouble fovy, GLdouble aspect, GLdouble zNear, GLdouble zFar)
{
GLdouble xmin, xmax, ymin, ymax;
- ymax = zNear * tan( fovy * M_PI / 360.0 );
+ ymax = zNear * tan(fovy * M_PI / 360.0);
ymin = -ymax;
xmin = ymin * aspect;
xmax = ymax * aspect;
- glFrustum( xmin, xmax, ymin, ymax, zNear, zFar );
+ glFrustum(xmin, xmax, ymin, ymax, zNear, zFar);
}
-void GLAPIENTRY gluPickMatrix( GLdouble x, GLdouble y,
- GLdouble width, GLdouble height,
- const GLint viewport[4] )
+void GLAPIENTRY
+gluPickMatrix(GLdouble x, GLdouble y,
+ GLdouble width, GLdouble height, const GLint viewport[4])
{
GLfloat m[16];
GLfloat sx, sy;
ty = (viewport[3] + 2.0 * (viewport[1] - y)) / height;
#define M(row,col) m[col*4+row]
- M(0,0) = sx; M(0,1) = 0.0; M(0,2) = 0.0; M(0,3) = tx;
- M(1,0) = 0.0; M(1,1) = sy; M(1,2) = 0.0; M(1,3) = ty;
- M(2,0) = 0.0; M(2,1) = 0.0; M(2,2) = 1.0; M(2,3) = 0.0;
- M(3,0) = 0.0; M(3,1) = 0.0; M(3,2) = 0.0; M(3,3) = 1.0;
+ M(0, 0) = sx;
+ M(0, 1) = 0.0;
+ M(0, 2) = 0.0;
+ M(0, 3) = tx;
+ M(1, 0) = 0.0;
+ M(1, 1) = sy;
+ M(1, 2) = 0.0;
+ M(1, 3) = ty;
+ M(2, 0) = 0.0;
+ M(2, 1) = 0.0;
+ M(2, 2) = 1.0;
+ M(2, 3) = 0.0;
+ M(3, 0) = 0.0;
+ M(3, 1) = 0.0;
+ M(3, 2) = 0.0;
+ M(3, 3) = 1.0;
#undef M
- glMultMatrixf( m );
+ glMultMatrixf(m);
}
-const GLubyte* GLAPIENTRY gluErrorString( GLenum errorCode )
+const GLubyte *GLAPIENTRY
+gluErrorString(GLenum errorCode)
{
static char *tess_error[] = {
"missing gluBeginPolygon",
};
/* GL Errors */
- if (errorCode==GL_NO_ERROR) {
+ if (errorCode == GL_NO_ERROR) {
return (GLubyte *) "no error";
}
- else if (errorCode==GL_INVALID_VALUE) {
+ else if (errorCode == GL_INVALID_VALUE) {
return (GLubyte *) "invalid value";
}
- else if (errorCode==GL_INVALID_ENUM) {
+ else if (errorCode == GL_INVALID_ENUM) {
return (GLubyte *) "invalid enum";
}
- else if (errorCode==GL_INVALID_OPERATION) {
+ else if (errorCode == GL_INVALID_OPERATION) {
return (GLubyte *) "invalid operation";
}
- else if (errorCode==GL_STACK_OVERFLOW) {
+ else if (errorCode == GL_STACK_OVERFLOW) {
return (GLubyte *) "stack overflow";
}
- else if (errorCode==GL_STACK_UNDERFLOW) {
+ else if (errorCode == GL_STACK_UNDERFLOW) {
return (GLubyte *) "stack underflow";
}
- else if (errorCode==GL_OUT_OF_MEMORY) {
+ else if (errorCode == GL_OUT_OF_MEMORY) {
return (GLubyte *) "out of memory";
}
/* GLU Errors */
- else if (errorCode==GLU_NO_ERROR) {
+ else if (errorCode == GLU_NO_ERROR) {
return (GLubyte *) "no error";
}
- else if (errorCode==GLU_INVALID_ENUM) {
+ else if (errorCode == GLU_INVALID_ENUM) {
return (GLubyte *) "invalid enum";
}
- else if (errorCode==GLU_INVALID_VALUE) {
+ else if (errorCode == GLU_INVALID_VALUE) {
return (GLubyte *) "invalid value";
}
- else if (errorCode==GLU_OUT_OF_MEMORY) {
+ else if (errorCode == GLU_OUT_OF_MEMORY) {
return (GLubyte *) "out of memory";
}
- else if (errorCode==GLU_INCOMPATIBLE_GL_VERSION) {
+ else if (errorCode == GLU_INCOMPATIBLE_GL_VERSION) {
return (GLubyte *) "incompatible GL version";
}
- else if (errorCode>=GLU_TESS_ERROR1 && errorCode<=GLU_TESS_ERROR8) {
- return (GLubyte *) tess_error[errorCode-GLU_TESS_ERROR1];
+ else if (errorCode >= GLU_TESS_ERROR1 && errorCode <= GLU_TESS_ERROR8) {
+ return (GLubyte *) tess_error[errorCode - GLU_TESS_ERROR1];
}
- else if (errorCode>=GLU_NURBS_ERROR1 && errorCode<=GLU_NURBS_ERROR37) {
- return (GLubyte *) nurbs_error[errorCode-GLU_NURBS_ERROR1];
+ else if (errorCode >= GLU_NURBS_ERROR1 && errorCode <= GLU_NURBS_ERROR37) {
+ return (GLubyte *) nurbs_error[errorCode - GLU_NURBS_ERROR1];
}
else {
return NULL;
* New in GLU 1.1
*/
-const GLubyte* GLAPIENTRY gluGetString( GLenum name )
+const GLubyte *GLAPIENTRY
+gluGetString(GLenum name)
{
static char *extensions = "GL_EXT_abgr";
- static char *version = "1.2 Mesa 3.3 beta";
+ static char *version = "1.1 Mesa 3.2.1";
switch (name) {
- case GLU_EXTENSIONS:
- return (GLubyte *) extensions;
- case GLU_VERSION:
- return (GLubyte *) version;
- default:
- return NULL;
+ case GLU_EXTENSIONS:
+ return (GLubyte *) extensions;
+ case GLU_VERSION:
+ return (GLubyte *) version;
+ default:
+ return NULL;
}
}
-#if 0 /* gluGetProcAddressEXT not finalized yet! */
+#if 0 /* gluGetProcAddressEXT not finalized yet! */
#ifdef __cplusplus
/* for BeOS R4.5 */
- void GLAPIENTRY (*gluGetProcAddressEXT(const GLubyte *procName))(...)
+void GLAPIENTRY(*gluGetProcAddressEXT(const GLubyte * procName)) (...)
#else
- void (GLAPIENTRY *gluGetProcAddressEXT(const GLubyte *procName))()
+void (GLAPIENTRY * gluGetProcAddressEXT(const GLubyte * procName)) ()
#endif
{
- struct proc {
+ struct proc
+ {
const char *name;
void *address;
};
static struct proc procTable[] = {
- { "gluGetProcAddressEXT", (void *) gluGetProcAddressEXT }, /* me! */
+ {"gluGetProcAddressEXT", (void *) gluGetProcAddressEXT}, /* me! */
/* new 1.1 functions */
- { "gluGetString", (void *) gluGetString },
+ {"gluGetString", (void *) gluGetString},
/* new 1.2 functions */
- { "gluTessBeginPolygon", (void *) gluTessBeginPolygon },
- { "gluTessBeginContour", (void *) gluTessBeginContour },
- { "gluTessEndContour", (void *) gluTessEndContour },
- { "gluTessEndPolygon", (void *) gluTessEndPolygon },
- { "gluGetTessProperty", (void *) gluGetTessProperty },
+ {"gluTessBeginPolygon", (void *) gluTessBeginPolygon},
+ {"gluTessBeginContour", (void *) gluTessBeginContour},
+ {"gluTessEndContour", (void *) gluTessEndContour},
+ {"gluTessEndPolygon", (void *) gluTessEndPolygon},
+ {"gluGetTessProperty", (void *) gluGetTessProperty},
/* new 1.3 functions */
- { NULL, NULL }
+ {NULL, NULL}
};
GLuint i;
for (i = 0; procTable[i].address; i++) {
if (strcmp((const char *) procName, procTable[i].name) == 0)
- return (void (GLAPIENTRY *)()) procTable[i].address;
+ return (void (GLAPIENTRY *) ()) procTable[i].address;
}
return NULL;
/*
* New in GLU 1.3
*/
+#ifdef GLU_VERSION_1_3
GLboolean GLAPIENTRY
-gluCheckExtension( const char *extName, const GLubyte *extString )
+gluCheckExtension(const char *extName, const GLubyte * extString)
{
assert(extName);
assert(extString);
const char *start = (const char *) extString;
while (1) {
- const char *c = strstr( start, extName );
- if (!c)
- return GL_FALSE;
+ const char *c = strstr(start, extName);
+ if (!c)
+ return GL_FALSE;
- if ((c == start || c[-1] == ' ') && (c[len] == ' ' || c[len] == 0))
- return GL_TRUE;
+ if ((c == start || c[-1] == ' ') && (c[len] == ' ' || c[len] == 0))
+ return GL_TRUE;
- start = c + len;
+ start = c + len;
}
}
}
+#endif
-/* $Id: gluP.h,v 1.4 2000/05/22 19:41:11 brianp Exp $ */
+/* $Id: gluP.h,v 1.5 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- * Copyright (C) 1995-1999 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: gluP.h,v $
- * Revision 1.4 2000/05/22 19:41:11 brianp
- * replaced __CYGWIN32__ with __CYGWIN__
- *
- * Revision 1.3 2000/05/22 16:25:37 brianp
- * added some Window-isms formerly in gl.h
- *
- * Revision 1.2 1999/12/07 09:02:12 joukj
- *
- * Committing in .
- *
- * Make supportupdate for VMS
- *
- * Modified Files:
- * Mesa/src-glu/descrip.mms Mesa/src-glu/gluP.h
- * ----------------------------------------------------------------------
- *
- * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
- * Imported sources
- *
- * Revision 1.4 1999/01/03 03:23:15 brianp
- * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
- *
- * Revision 1.3 1997/08/01 22:25:27 brianp
- * check for Cygnus Win32 (Stephen Rehel)
- *
- * Revision 1.2 1997/05/27 02:59:46 brianp
- * added defines for APIENTRY and CALLBACK if not compiling on Win32
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
-
-/*
* This file allows the GLU code to be compiled either with the Mesa
* headers or with the real OpenGL headers.
*/
#define GLUP_H
-#include "GL/gl.h"
-#include "GL/glu.h"
+#include <GL/gl.h>
+#include <GL/glu.h>
#include <string.h>
-
#if defined(_WIN32) && !defined(__WIN32__)
# define __WIN32__
#endif
-
-#ifndef MESA
+#ifndef GLU_TESS_ERROR9
/* If we're using the real OpenGL header files... */
# define GLU_TESS_ERROR9 100159
#endif
-/* $Id: mipmap.c,v 1.6 2000/06/05 16:27:41 brianp Exp $ */
+/* $Id: mipmap.c,v 1.7 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
/* To work around optimizer bug in MSVC4.1 */
#if defined(__WIN32__) && !defined(OPENSTEP)
-void dummy(GLuint j, GLuint k){
+void
+dummy(GLuint j, GLuint k)
+{
}
#else
#define dummy(J, K)
#endif
-GLint GLAPIENTRY gluScaleImage( GLenum format,
- GLsizei widthin, GLsizei heightin,
- GLenum typein, const void *datain,
- GLsizei widthout, GLsizei heightout,
- GLenum typeout, void *dataout )
+GLint GLAPIENTRY
+gluScaleImage(GLenum format,
+ GLsizei widthin, GLsizei heightin,
+ GLenum typein, const void *datain,
+ GLsizei widthout, GLsizei heightout,
+ GLenum typeout, void *dataout)
{
GLint components, i, j, k;
GLfloat *tempin, *tempout;
/* Determine number of components per pixel */
switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- components = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- components = 2;
- break;
- case GL_RGB:
- case GL_BGR:
- components = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
+ case GL_COLOR_INDEX:
+ case GL_STENCIL_INDEX:
+ case GL_DEPTH_COMPONENT:
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ components = 1;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ components = 2;
+ break;
+ case GL_RGB:
+ case GL_BGR:
+ components = 3;
+ break;
+ case GL_RGBA:
+ case GL_BGRA:
#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
+ case GL_ABGR_EXT:
#endif
- components = 4;
- break;
- default:
- return GLU_INVALID_ENUM;
+ components = 4;
+ break;
+ default:
+ return GLU_INVALID_ENUM;
}
/* Determine bytes per input datum */
switch (typein) {
- case GL_UNSIGNED_BYTE: sizein = sizeof(GLubyte); break;
- case GL_BYTE: sizein = sizeof(GLbyte); break;
- case GL_UNSIGNED_SHORT: sizein = sizeof(GLushort); break;
- case GL_SHORT: sizein = sizeof(GLshort); break;
- case GL_UNSIGNED_INT: sizein = sizeof(GLuint); break;
- case GL_INT: sizein = sizeof(GLint); break;
- case GL_FLOAT: sizein = sizeof(GLfloat); break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
+ case GL_UNSIGNED_BYTE:
+ sizein = sizeof(GLubyte);
+ break;
+ case GL_BYTE:
+ sizein = sizeof(GLbyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ sizein = sizeof(GLushort);
+ break;
+ case GL_SHORT:
+ sizein = sizeof(GLshort);
+ break;
+ case GL_UNSIGNED_INT:
+ sizein = sizeof(GLuint);
+ break;
+ case GL_INT:
+ sizein = sizeof(GLint);
+ break;
+ case GL_FLOAT:
+ sizein = sizeof(GLfloat);
+ break;
+ case GL_BITMAP:
+ /* not implemented yet */
+ default:
+ return GL_INVALID_ENUM;
}
/* Determine bytes per output datum */
switch (typeout) {
- case GL_UNSIGNED_BYTE: sizeout = sizeof(GLubyte); break;
- case GL_BYTE: sizeout = sizeof(GLbyte); break;
- case GL_UNSIGNED_SHORT: sizeout = sizeof(GLushort); break;
- case GL_SHORT: sizeout = sizeof(GLshort); break;
- case GL_UNSIGNED_INT: sizeout = sizeof(GLuint); break;
- case GL_INT: sizeout = sizeof(GLint); break;
- case GL_FLOAT: sizeout = sizeof(GLfloat); break;
- case GL_BITMAP:
- /* not implemented yet */
- default:
- return GL_INVALID_ENUM;
+ case GL_UNSIGNED_BYTE:
+ sizeout = sizeof(GLubyte);
+ break;
+ case GL_BYTE:
+ sizeout = sizeof(GLbyte);
+ break;
+ case GL_UNSIGNED_SHORT:
+ sizeout = sizeof(GLushort);
+ break;
+ case GL_SHORT:
+ sizeout = sizeof(GLshort);
+ break;
+ case GL_UNSIGNED_INT:
+ sizeout = sizeof(GLuint);
+ break;
+ case GL_INT:
+ sizeout = sizeof(GLint);
+ break;
+ case GL_FLOAT:
+ sizeout = sizeof(GLfloat);
+ break;
+ case GL_BITMAP:
+ /* not implemented yet */
+ default:
+ return GL_INVALID_ENUM;
}
/* Get glPixelStore state */
- glGetIntegerv( GL_UNPACK_ROW_LENGTH, &unpackrowlength );
- glGetIntegerv( GL_UNPACK_ALIGNMENT, &unpackalignment );
- glGetIntegerv( GL_UNPACK_SKIP_ROWS, &unpackskiprows );
- glGetIntegerv( GL_UNPACK_SKIP_PIXELS, &unpackskippixels );
- glGetIntegerv( GL_PACK_ROW_LENGTH, &packrowlength );
- glGetIntegerv( GL_PACK_ALIGNMENT, &packalignment );
- glGetIntegerv( GL_PACK_SKIP_ROWS, &packskiprows );
- glGetIntegerv( GL_PACK_SKIP_PIXELS, &packskippixels );
+ glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
+ glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
+ glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
+ glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
+ glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
+ glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
+ glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
+ glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
/* Allocate storage for intermediate images */
- tempin = (GLfloat *) malloc( widthin * heightin
- * components * sizeof(GLfloat) );
+ tempin = (GLfloat *) malloc(widthin * heightin
+ * components * sizeof(GLfloat));
if (!tempin) {
return GLU_OUT_OF_MEMORY;
}
- tempout = (GLfloat *) malloc( widthout * heightout
- * components * sizeof(GLfloat) );
+ tempout = (GLfloat *) malloc(widthout * heightout
+ * components * sizeof(GLfloat));
if (!tempout) {
- free( tempin );
+ free(tempin);
return GLU_OUT_OF_MEMORY;
}
* Unpack the pixel data and convert to floating point
*/
- if (unpackrowlength>0) {
+ if (unpackrowlength > 0) {
rowlen = unpackrowlength;
}
else {
rowstride = components * rowlen;
}
else {
- rowstride = unpackalignment/sizein
- * CEILING( components * rowlen * sizein, unpackalignment );
+ rowstride = unpackalignment / sizein
+ * CEILING(components * rowlen * sizein, unpackalignment);
}
switch (typein) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLubyte *ubptr = (GLubyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *ubptr++;
- }
+ case GL_UNSIGNED_BYTE:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLubyte *ubptr = (GLubyte *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * ubptr++;
}
- break;
- case GL_BYTE:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLbyte *bptr = (GLbyte *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *bptr++;
- }
+ }
+ break;
+ case GL_BYTE:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLbyte *bptr = (GLbyte *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * bptr++;
}
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLushort *usptr = (GLushort *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *usptr++;
- }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLushort *usptr = (GLushort *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * usptr++;
}
- break;
- case GL_SHORT:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLshort *sptr = (GLshort *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *sptr++;
- }
+ }
+ break;
+ case GL_SHORT:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLshort *sptr = (GLshort *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * sptr++;
}
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLuint *uiptr = (GLuint *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *uiptr++;
- }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLuint *uiptr = (GLuint *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * uiptr++;
}
- break;
- case GL_INT:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLint *iptr = (GLint *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = (GLfloat) *iptr++;
- }
+ }
+ break;
+ case GL_INT:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLint *iptr = (GLint *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = (GLfloat) * iptr++;
}
- break;
- case GL_FLOAT:
- k = 0;
- for (i=0;i<heightin;i++) {
- GLfloat *fptr = (GLfloat *) datain
- + i * rowstride
- + unpackskiprows * rowstride
- + unpackskippixels * components;
- for (j=0;j<widthin*components;j++) {
- dummy(j, k);
- tempin[k++] = *fptr++;
- }
+ }
+ break;
+ case GL_FLOAT:
+ k = 0;
+ for (i = 0; i < heightin; i++) {
+ GLfloat *fptr = (GLfloat *) datain
+ + i * rowstride
+ + unpackskiprows * rowstride + unpackskippixels * components;
+ for (j = 0; j < widthin * components; j++) {
+ dummy(j, k);
+ tempin[k++] = *fptr++;
}
- break;
- default:
- return GLU_INVALID_ENUM;
+ }
+ break;
+ default:
+ return GLU_INVALID_ENUM;
}
*/
if (widthout > 1)
- sx = (GLfloat) (widthin-1) / (GLfloat) (widthout-1);
+ sx = (GLfloat) (widthin - 1) / (GLfloat) (widthout - 1);
else
- sx = (GLfloat) (widthin-1);
+ sx = (GLfloat) (widthin - 1);
if (heightout > 1)
- sy = (GLfloat) (heightin-1) / (GLfloat) (heightout-1);
+ sy = (GLfloat) (heightin - 1) / (GLfloat) (heightout - 1);
else
- sy = (GLfloat) (heightin-1);
+ sy = (GLfloat) (heightin - 1);
/*#define POINT_SAMPLE*/
#ifdef POINT_SAMPLE
- for (i=0;i<heightout;i++) {
+ for (i = 0; i < heightout; i++) {
GLint ii = i * sy;
- for (j=0;j<widthout;j++) {
+ for (j = 0; j < widthout; j++) {
GLint jj = j * sx;
GLfloat *src = tempin + (ii * widthin + jj) * components;
GLfloat *dst = tempout + (i * widthout + j) * components;
- for (k=0;k<components;k++) {
+ for (k = 0; k < components; k++) {
*dst++ = *src++;
}
}
}
#else
- if (sx<1.0 && sy<1.0) {
+ if (sx < 1.0 && sy < 1.0) {
/* magnify both width and height: use weighted sample of 4 pixels */
GLint i0, i1, j0, j1;
GLfloat alpha, beta;
GLfloat s1, s2;
GLfloat *dst;
- for (i=0;i<heightout;i++) {
+ for (i = 0; i < heightout; i++) {
i0 = i * sy;
i1 = i0 + 1;
- if (i1 >= heightin) i1 = heightin-1;
+ if (i1 >= heightin)
+ i1 = heightin - 1;
/* i1 = (i+1) * sy - EPSILON;*/
- alpha = i*sy - i0;
- for (j=0;j<widthout;j++) {
+ alpha = i * sy - i0;
+ for (j = 0; j < widthout; j++) {
j0 = j * sx;
j1 = j0 + 1;
- if (j1 >= widthin) j1 = widthin-1;
+ if (j1 >= widthin)
+ j1 = widthin - 1;
/* j1 = (j+1) * sx - EPSILON; */
- beta = j*sx - j0;
+ beta = j * sx - j0;
/* compute weighted average of pixels in rect (i0,j0)-(i1,j1) */
src00 = tempin + (i0 * widthin + j0) * components;
dst = tempout + (i * widthout + j) * components;
- for (k=0;k<components;k++) {
- s1 = *src00++ * (1.0-beta) + *src01++ * beta;
- s2 = *src10++ * (1.0-beta) + *src11++ * beta;
- *dst++ = s1 * (1.0-alpha) + s2 * alpha;
+ for (k = 0; k < components; k++) {
+ s1 = *src00++ * (1.0 - beta) + *src01++ * beta;
+ s2 = *src10++ * (1.0 - beta) + *src11++ * beta;
+ *dst++ = s1 * (1.0 - alpha) + s2 * alpha;
}
}
}
GLint ii, jj;
GLfloat sum, *dst;
- for (i=0;i<heightout;i++) {
+ for (i = 0; i < heightout; i++) {
i0 = i * sy;
i1 = i0 + 1;
- if (i1 >= heightin) i1 = heightin-1;
+ if (i1 >= heightin)
+ i1 = heightin - 1;
/* i1 = (i+1) * sy - EPSILON; */
- for (j=0;j<widthout;j++) {
+ for (j = 0; j < widthout; j++) {
j0 = j * sx;
j1 = j0 + 1;
- if (j1 >= widthin) j1 = widthin-1;
+ if (j1 >= widthin)
+ j1 = widthin - 1;
/* j1 = (j+1) * sx - EPSILON; */
dst = tempout + (i * widthout + j) * components;
/* compute average of pixels in the rectangle (i0,j0)-(i1,j1) */
- for (k=0;k<components;k++) {
+ for (k = 0; k < components; k++) {
sum = 0.0;
- for (ii=i0;ii<=i1;ii++) {
- for (jj=j0;jj<=j1;jj++) {
+ for (ii = i0; ii <= i1; ii++) {
+ for (jj = j0; jj <= j1; jj++) {
sum += *(tempin + (ii * widthin + jj) * components + k);
}
}
- sum /= (j1-j0+1) * (i1-i0+1);
+ sum /= (j1 - j0 + 1) * (i1 - i0 + 1);
*dst++ = sum;
}
}
* Return output image
*/
- if (packrowlength>0) {
+ if (packrowlength > 0) {
rowlen = packrowlength;
}
else {
rowstride = components * rowlen;
}
else {
- rowstride = packalignment/sizeout
- * CEILING( components * rowlen * sizeout, packalignment );
+ rowstride = packalignment / sizeout
+ * CEILING(components * rowlen * sizeout, packalignment);
}
switch (typeout) {
- case GL_UNSIGNED_BYTE:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLubyte *ubptr = (GLubyte *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *ubptr++ = (GLubyte) tempout[k++];
- }
+ case GL_UNSIGNED_BYTE:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLubyte *ubptr = (GLubyte *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *ubptr++ = (GLubyte) tempout[k++];
}
- break;
- case GL_BYTE:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLbyte *bptr = (GLbyte *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *bptr++ = (GLbyte) tempout[k++];
- }
+ }
+ break;
+ case GL_BYTE:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLbyte *bptr = (GLbyte *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *bptr++ = (GLbyte) tempout[k++];
}
- break;
- case GL_UNSIGNED_SHORT:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLushort *usptr = (GLushort *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *usptr++ = (GLushort) tempout[k++];
- }
+ }
+ break;
+ case GL_UNSIGNED_SHORT:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLushort *usptr = (GLushort *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *usptr++ = (GLushort) tempout[k++];
}
- break;
- case GL_SHORT:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLshort *sptr = (GLshort *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *sptr++ = (GLshort) tempout[k++];
- }
+ }
+ break;
+ case GL_SHORT:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLshort *sptr = (GLshort *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *sptr++ = (GLshort) tempout[k++];
}
- break;
- case GL_UNSIGNED_INT:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLuint *uiptr = (GLuint *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *uiptr++ = (GLuint) tempout[k++];
- }
+ }
+ break;
+ case GL_UNSIGNED_INT:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLuint *uiptr = (GLuint *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *uiptr++ = (GLuint) tempout[k++];
}
- break;
- case GL_INT:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLint *iptr = (GLint *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *iptr++ = (GLint) tempout[k++];
- }
+ }
+ break;
+ case GL_INT:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLint *iptr = (GLint *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *iptr++ = (GLint) tempout[k++];
}
- break;
- case GL_FLOAT:
- k = 0;
- for (i=0;i<heightout;i++) {
- GLfloat *fptr = (GLfloat *) dataout
- + i * rowstride
- + packskiprows * rowstride
- + packskippixels * components;
- for (j=0;j<widthout*components;j++) {
- dummy(j, k+i);
- *fptr++ = tempout[k++];
- }
+ }
+ break;
+ case GL_FLOAT:
+ k = 0;
+ for (i = 0; i < heightout; i++) {
+ GLfloat *fptr = (GLfloat *) dataout
+ + i * rowstride
+ + packskiprows * rowstride + packskippixels * components;
+ for (j = 0; j < widthout * components; j++) {
+ dummy(j, k + i);
+ *fptr++ = tempout[k++];
}
- break;
- default:
- return GLU_INVALID_ENUM;
+ }
+ break;
+ default:
+ return GLU_INVALID_ENUM;
}
/* free temporary image storage */
- free( tempin );
- free( tempout );
+ free(tempin);
+ free(tempout);
return 0;
}
/*
* Return the largest k such that 2^k <= n.
*/
-static GLint ilog2( GLint n )
+static GLint
+ilog2(GLint n)
{
GLint k;
- if (n<=0) return 0;
- for (k=0; n>>=1; k++) ;
+ if (n <= 0)
+ return 0;
+ for (k = 0; n >>= 1; k++);
return k;
}
/*
* Find the value nearest to n which is also a power of two.
*/
-static GLint round2( GLint n )
+static GLint
+round2(GLint n)
{
GLint m;
- for (m=1; m<n; m*=2)
- ;
+ for (m = 1; m < n; m *= 2);
/* m>=n */
- if (m-n <= n-m/2) {
+ if (m - n <= n - m / 2) {
return m;
}
else {
- return m/2;
+ return m / 2;
}
}
* Given an pixel format and datatype, return the number of bytes to
* store one pixel.
*/
-static GLint bytes_per_pixel( GLenum format, GLenum type )
+static GLint
+bytes_per_pixel(GLenum format, GLenum type)
{
GLint n, m;
switch (format) {
- case GL_COLOR_INDEX:
- case GL_STENCIL_INDEX:
- case GL_DEPTH_COMPONENT:
- case GL_RED:
- case GL_GREEN:
- case GL_BLUE:
- case GL_ALPHA:
- case GL_LUMINANCE:
- n = 1;
- break;
- case GL_LUMINANCE_ALPHA:
- n = 2;
- break;
- case GL_RGB:
- n = 3;
- break;
- case GL_RGBA:
- case GL_BGRA:
+ case GL_COLOR_INDEX:
+ case GL_STENCIL_INDEX:
+ case GL_DEPTH_COMPONENT:
+ case GL_RED:
+ case GL_GREEN:
+ case GL_BLUE:
+ case GL_ALPHA:
+ case GL_LUMINANCE:
+ n = 1;
+ break;
+ case GL_LUMINANCE_ALPHA:
+ n = 2;
+ break;
+ case GL_RGB:
+ n = 3;
+ break;
+ case GL_RGBA:
+ case GL_BGRA:
#ifdef GL_EXT_abgr
- case GL_ABGR_EXT:
+ case GL_ABGR_EXT:
#endif
- n = 4;
- break;
- default:
- n = 0;
+ n = 4;
+ break;
+ default:
+ n = 0;
}
switch (type) {
- case GL_UNSIGNED_BYTE: m = sizeof(GLubyte); break;
- case GL_BYTE: m = sizeof(GLbyte); break;
- case GL_BITMAP: m = 1; break;
- case GL_UNSIGNED_SHORT: m = sizeof(GLushort); break;
- case GL_SHORT: m = sizeof(GLshort); break;
- case GL_UNSIGNED_INT: m = sizeof(GLuint); break;
- case GL_INT: m = sizeof(GLint); break;
- case GL_FLOAT: m = sizeof(GLfloat); break;
- default: m = 0;
+ case GL_UNSIGNED_BYTE:
+ m = sizeof(GLubyte);
+ break;
+ case GL_BYTE:
+ m = sizeof(GLbyte);
+ break;
+ case GL_BITMAP:
+ m = 1;
+ break;
+ case GL_UNSIGNED_SHORT:
+ m = sizeof(GLushort);
+ break;
+ case GL_SHORT:
+ m = sizeof(GLshort);
+ break;
+ case GL_UNSIGNED_INT:
+ m = sizeof(GLuint);
+ break;
+ case GL_INT:
+ m = sizeof(GLint);
+ break;
+ case GL_FLOAT:
+ m = sizeof(GLfloat);
+ break;
+ default:
+ m = 0;
}
return n * m;
/*
* WARNING: This function isn't finished and has never been tested!!!!
*/
-GLint GLAPIENTRY gluBuild1DMipmaps( GLenum target, GLint components,
- GLsizei width, GLenum format,
- GLenum type, const void *data )
+GLint GLAPIENTRY
+gluBuild1DMipmaps(GLenum target, GLint components,
+ GLsizei width, GLenum format, GLenum type, const void *data)
{
GLubyte *texture;
GLint levels, max_levels;
if (width < 1)
return GLU_INVALID_VALUE;
- glGetIntegerv( GL_MAX_TEXTURE_SIZE, &max_width );
- max_levels = ilog2( max_width ) + 1;
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_width);
+ max_levels = ilog2(max_width) + 1;
/* Compute how many mipmap images to make */
- levels = ilog2( width ) + 1;
- if (levels>max_levels) {
+ levels = ilog2(width) + 1;
+ if (levels > max_levels) {
levels = max_levels;
}
- new_width = 1 << (levels-1);
+ new_width = 1 << (levels - 1);
- texture = (GLubyte *) malloc( new_width * components );
+ texture = (GLubyte *) malloc(new_width * components);
if (!texture) {
return GLU_OUT_OF_MEMORY;
}
if (width != new_width) {
/* initial rescaling */
switch (type) {
- case GL_UNSIGNED_BYTE:
- {
- GLubyte *ub_data = (GLubyte *) data;
- for (i=0;i<new_width;i++) {
- j = i * width / new_width;
- for (k=0;k<components;k++) {
- texture[i*components+k] = ub_data[j*components+k];
- }
+ case GL_UNSIGNED_BYTE:
+ {
+ GLubyte *ub_data = (GLubyte *) data;
+ for (i = 0; i < new_width; i++) {
+ j = i * width / new_width;
+ for (k = 0; k < components; k++) {
+ texture[i * components + k] = ub_data[j * components + k];
}
}
- break;
- default:
- /* Not implemented */
- return GLU_ERROR;
+ }
+ break;
+ default:
+ /* Not implemented */
+ return GLU_ERROR;
}
}
/* generate and load mipmap images */
- for (l=0;l<levels;l++) {
- glTexImage1D( GL_TEXTURE_1D, l, components, new_width, 0,
- format, GL_UNSIGNED_BYTE, texture );
+ for (l = 0; l < levels; l++) {
+ glTexImage1D(GL_TEXTURE_1D, l, components, new_width, 0,
+ format, GL_UNSIGNED_BYTE, texture);
/* Scale image down to 1/2 size */
new_width = new_width / 2;
- for (i=0;i<new_width;i++) {
- for (k=0;k<components;k++) {
+ for (i = 0; i < new_width; i++) {
+ for (k = 0; k < components; k++) {
GLint sample1, sample2;
- sample1 = (GLint) texture[i*2*components+k];
- sample2 = (GLint) texture[(i*2+1)*components+k];
- texture[i*components+k] = (GLubyte) ((sample1 + sample2) / 2);
+ sample1 = (GLint) texture[i * 2 * components + k];
+ sample2 = (GLint) texture[(i * 2 + 1) * components + k];
+ texture[i * components + k] = (GLubyte) ((sample1 + sample2) / 2);
}
}
}
- free( texture );
+ free(texture);
return 0;
}
-GLint GLAPIENTRY gluBuild2DMipmaps( GLenum target, GLint components,
- GLsizei width, GLsizei height, GLenum format,
- GLenum type, const void *data )
+GLint GLAPIENTRY
+gluBuild2DMipmaps(GLenum target, GLint components,
+ GLsizei width, GLsizei height, GLenum format,
+ GLenum type, const void *data)
{
GLint w, h, maxsize;
void *image, *newimage;
if (width < 1 || height < 1)
return GLU_INVALID_VALUE;
- glGetIntegerv( GL_MAX_TEXTURE_SIZE, &maxsize );
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxsize);
- w = round2( width );
- if (w>maxsize) {
+ w = round2(width);
+ if (w > maxsize) {
w = maxsize;
}
- h = round2( height );
- if (h>maxsize) {
+ h = round2(height);
+ if (h > maxsize) {
h = maxsize;
}
- bpp = bytes_per_pixel( format, type );
- if (bpp==0) {
+ bpp = bytes_per_pixel(format, type);
+ if (bpp == 0) {
/* probably a bad format or type enum */
return GLU_INVALID_ENUM;
}
/* Get current glPixelStore values */
- glGetIntegerv( GL_UNPACK_ROW_LENGTH, &unpackrowlength );
- glGetIntegerv( GL_UNPACK_ALIGNMENT, &unpackalignment );
- glGetIntegerv( GL_UNPACK_SKIP_ROWS, &unpackskiprows );
- glGetIntegerv( GL_UNPACK_SKIP_PIXELS, &unpackskippixels );
- glGetIntegerv( GL_PACK_ROW_LENGTH, &packrowlength );
- glGetIntegerv( GL_PACK_ALIGNMENT, &packalignment );
- glGetIntegerv( GL_PACK_SKIP_ROWS, &packskiprows );
- glGetIntegerv( GL_PACK_SKIP_PIXELS, &packskippixels );
+ glGetIntegerv(GL_UNPACK_ROW_LENGTH, &unpackrowlength);
+ glGetIntegerv(GL_UNPACK_ALIGNMENT, &unpackalignment);
+ glGetIntegerv(GL_UNPACK_SKIP_ROWS, &unpackskiprows);
+ glGetIntegerv(GL_UNPACK_SKIP_PIXELS, &unpackskippixels);
+ glGetIntegerv(GL_PACK_ROW_LENGTH, &packrowlength);
+ glGetIntegerv(GL_PACK_ALIGNMENT, &packalignment);
+ glGetIntegerv(GL_PACK_SKIP_ROWS, &packskiprows);
+ glGetIntegerv(GL_PACK_SKIP_PIXELS, &packskippixels);
/* set pixel packing */
- glPixelStorei( GL_PACK_ROW_LENGTH, 0 );
- glPixelStorei( GL_PACK_ALIGNMENT, 1 );
- glPixelStorei( GL_PACK_SKIP_ROWS, 0 );
- glPixelStorei( GL_PACK_SKIP_PIXELS, 0 );
+ glPixelStorei(GL_PACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_PACK_ALIGNMENT, 1);
+ glPixelStorei(GL_PACK_SKIP_ROWS, 0);
+ glPixelStorei(GL_PACK_SKIP_PIXELS, 0);
done = GL_FALSE;
- if (w!=width || h!=height) {
+ if (w != width || h != height) {
/* must rescale image to get "top" mipmap texture image */
- image = malloc( (w+4) * h * bpp );
+ image = malloc((w + 4) * h * bpp);
if (!image) {
return GLU_OUT_OF_MEMORY;
}
- error = gluScaleImage( format, width, height, type, data,
- w, h, type, image );
+ error = gluScaleImage(format, width, height, type, data,
+ w, h, type, image);
if (error) {
- retval = error;
- done = GL_TRUE;
+ retval = error;
+ done = GL_TRUE;
}
}
else {
level = 0;
while (!done) {
if (image != data) {
- /* set pixel unpacking */
- glPixelStorei( GL_UNPACK_ROW_LENGTH, 0 );
- glPixelStorei( GL_UNPACK_ALIGNMENT, 1 );
- glPixelStorei( GL_UNPACK_SKIP_ROWS, 0 );
- glPixelStorei( GL_UNPACK_SKIP_PIXELS, 0 );
+ /* set pixel unpacking */
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
}
- glTexImage2D( target, level, components, w, h, 0, format, type, image );
+ glTexImage2D(target, level, components, w, h, 0, format, type, image);
- if (w==1 && h==1) break;
+ if (w == 1 && h == 1)
+ break;
- neww = (w<2) ? 1 : w/2;
- newh = (h<2) ? 1 : h/2;
- newimage = malloc( (neww+4) * newh * bpp );
+ neww = (w < 2) ? 1 : w / 2;
+ newh = (h < 2) ? 1 : h / 2;
+ newimage = malloc((neww + 4) * newh * bpp);
if (!newimage) {
return GLU_OUT_OF_MEMORY;
}
- error = gluScaleImage( format, w, h, type, image,
- neww, newh, type, newimage );
+ error = gluScaleImage(format, w, h, type, image,
+ neww, newh, type, newimage);
if (error) {
- retval = error;
- done = GL_TRUE;
+ retval = error;
+ done = GL_TRUE;
}
- if (image!=data) {
- free( image );
+ if (image != data) {
+ free(image);
}
image = newimage;
level++;
}
- if (image!=data) {
- free( image );
+ if (image != data) {
+ free(image);
}
/* Restore original glPixelStore state */
- glPixelStorei( GL_UNPACK_ROW_LENGTH, unpackrowlength );
- glPixelStorei( GL_UNPACK_ALIGNMENT, unpackalignment );
- glPixelStorei( GL_UNPACK_SKIP_ROWS, unpackskiprows );
- glPixelStorei( GL_UNPACK_SKIP_PIXELS, unpackskippixels );
- glPixelStorei( GL_PACK_ROW_LENGTH, packrowlength );
- glPixelStorei( GL_PACK_ALIGNMENT, packalignment );
- glPixelStorei( GL_PACK_SKIP_ROWS, packskiprows );
- glPixelStorei( GL_PACK_SKIP_PIXELS, packskippixels );
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, unpackrowlength);
+ glPixelStorei(GL_UNPACK_ALIGNMENT, unpackalignment);
+ glPixelStorei(GL_UNPACK_SKIP_ROWS, unpackskiprows);
+ glPixelStorei(GL_UNPACK_SKIP_PIXELS, unpackskippixels);
+ glPixelStorei(GL_PACK_ROW_LENGTH, packrowlength);
+ glPixelStorei(GL_PACK_ALIGNMENT, packalignment);
+ glPixelStorei(GL_PACK_SKIP_ROWS, packskiprows);
+ glPixelStorei(GL_PACK_SKIP_PIXELS, packskippixels);
return retval;
}
-
-/* $Id: nurbs.c,v 1.3 2000/02/10 17:45:52 brianp Exp $ */
+/* $Id: nurbs.c,v 1.4 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
* See README2 for more info.
*/
+
#ifdef PC_HEADER
#include "all.h"
#else
void
-call_user_error( GLUnurbsObj *nobj, GLenum error )
+call_user_error(GLUnurbsObj * nobj, GLenum error)
{
- nobj->error=error;
- if(nobj->error_callback != NULL) {
- (*(nobj->error_callback))(error);
- }
- else {
- printf("NURBS error %d %s\n", error, (char *) gluErrorString(error) );
- }
+ nobj->error = error;
+ if (nobj->error_callback != NULL) {
+ (*(nobj->error_callback)) (error);
+ }
+ else {
+ printf("NURBS error %d %s\n", error, (char *) gluErrorString(error));
+ }
}
-GLUnurbsObj * GLAPIENTRY gluNewNurbsRenderer( void )
+GLUnurbsObj *GLAPIENTRY
+gluNewNurbsRenderer(void)
{
GLUnurbsObj *n;
GLfloat tmp_viewport[4];
- GLint i,j;
+ GLint i, j;
- n = (GLUnurbsObj *) malloc( sizeof(GLUnurbsObj) );
+ n = (GLUnurbsObj *) malloc(sizeof(GLUnurbsObj));
if (n) {
/* init */
- n->culling=GL_FALSE;
- n->nurbs_type=GLU_NURBS_NONE;
- n->error=GLU_NO_ERROR;
- n->error_callback=NULL;
- n->auto_load_matrix=GL_TRUE;
- n->sampling_tolerance=50.0;
- n->parametric_tolerance=0.5;
+ n->culling = GL_FALSE;
+ n->nurbs_type = GLU_NURBS_NONE;
+ n->error = GLU_NO_ERROR;
+ n->error_callback = NULL;
+ n->auto_load_matrix = GL_TRUE;
+ n->sampling_tolerance = 50.0;
+ n->parametric_tolerance = 0.5;
n->u_step = n->v_step = 100;
n->sampling_method = GLU_PATH_LENGTH;
- n->display_mode=GLU_FILL;
+ n->display_mode = GLU_FILL;
/* in case the user doesn't supply the sampling matrices */
/* set projection and modelview to identity */
- for(i=0;i<4;i++)
- for(j=0;j<4;j++)
- if(i==j)
- {
- n->sampling_matrices.model[i*4+j]=1.0;
- n->sampling_matrices.proj[i*4+j]=1.0;
- }
- else
- {
- n->sampling_matrices.model[i*4+j]=0.0;
- n->sampling_matrices.proj[i*4+j]=0.0;
- }
+ for (i = 0; i < 4; i++)
+ for (j = 0; j < 4; j++)
+ if (i == j) {
+ n->sampling_matrices.model[i * 4 + j] = 1.0;
+ n->sampling_matrices.proj[i * 4 + j] = 1.0;
+ }
+ else {
+ n->sampling_matrices.model[i * 4 + j] = 0.0;
+ n->sampling_matrices.proj[i * 4 + j] = 0.0;
+ }
/* and set the viewport sampling matrix to current ciewport */
- glGetFloatv(GL_VIEWPORT,tmp_viewport);
- for(i=0;i<4;i++)
- n->sampling_matrices.viewport[i]=tmp_viewport[i];
- n->trim=NULL;
+ glGetFloatv(GL_VIEWPORT, tmp_viewport);
+ for (i = 0; i < 4; i++)
+ n->sampling_matrices.viewport[i] = tmp_viewport[i];
+ n->trim = NULL;
}
return n;
}
-void GLAPIENTRY gluDeleteNurbsRenderer( GLUnurbsObj *nobj )
+void GLAPIENTRY
+gluDeleteNurbsRenderer(GLUnurbsObj * nobj)
{
if (nobj) {
- free( nobj );
+ free(nobj);
}
}
-void GLAPIENTRY gluLoadSamplingMatrices( GLUnurbsObj *nobj,
- const GLfloat modelMatrix[16],
- const GLfloat projMatrix[16],
- const GLint viewport[4] )
+void GLAPIENTRY
+gluLoadSamplingMatrices(GLUnurbsObj * nobj,
+ const GLfloat modelMatrix[16],
+ const GLfloat projMatrix[16], const GLint viewport[4])
{
- GLint i;
-
- for(i=0;i<16;i++)
- {
- nobj->sampling_matrices.model[i]=modelMatrix[i];
- nobj->sampling_matrices.proj[i]=projMatrix[i];
- }
- for(i=0;i<4;i++)
- nobj->sampling_matrices.viewport[i]=viewport[i];
+ GLint i;
+
+ for (i = 0; i < 16; i++) {
+ nobj->sampling_matrices.model[i] = modelMatrix[i];
+ nobj->sampling_matrices.proj[i] = projMatrix[i];
+ }
+ for (i = 0; i < 4; i++)
+ nobj->sampling_matrices.viewport[i] = viewport[i];
}
-void GLAPIENTRY gluNurbsProperty( GLUnurbsObj *nobj, GLenum property, GLfloat value )
+void GLAPIENTRY
+gluNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat value)
{
GLenum val;
switch (property) {
- case GLU_SAMPLING_TOLERANCE:
- if(value <= 0.0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return;
- }
- nobj->sampling_tolerance=value;
- break;
- case GLU_PARAMETRIC_TOLERANCE:
- if(value <= 0.0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return;
- }
- nobj->parametric_tolerance=value;
- break;
- case GLU_U_STEP:
- if(value <= 0.0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return;
- }
- nobj->u_step=(GLint)value;
- break;
- case GLU_V_STEP:
- if(value <= 0.0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return;
- }
- nobj->v_step=(GLint)value;
- break;
- case GLU_SAMPLING_METHOD:
- val = (GLenum)value;
- if(val!=GLU_PATH_LENGTH && val!=GLU_PARAMETRIC_ERROR && val!=GLU_DOMAIN_DISTANCE)
- {
- call_user_error(nobj,GLU_INVALID_ENUM);
- return;
- }
- nobj->sampling_method=val;
- break;
- case GLU_DISPLAY_MODE:
- val=(GLenum)value;
- if(val!=GLU_FILL && val!=GLU_OUTLINE_POLYGON && val!=GLU_OUTLINE_PATCH)
- {
- call_user_error(nobj,GLU_INVALID_ENUM);
- return;
- }
- if(nobj->nurbs_type==GLU_NURBS_CURVE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR26);
- return;
- }
- nobj->display_mode=val;
-if(val==GLU_OUTLINE_PATCH)
- fprintf(stderr,"NURBS, for the moment, can display only in POLYGON mode\n");
- break;
- case GLU_CULLING:
- val=(GLenum)value;
- if(val!=GL_TRUE && val!=GL_FALSE)
- {
- call_user_error(nobj,GLU_INVALID_ENUM);
- return;
- }
- nobj->culling = (GLboolean) value;
- break;
- case GLU_AUTO_LOAD_MATRIX:
- val=(GLenum)value;
- if(val!=GL_TRUE && val!=GL_FALSE)
- {
- call_user_error(nobj,GLU_INVALID_ENUM);
- return;
- }
- nobj->auto_load_matrix = (GLboolean) value;
- break;
- default:
- call_user_error(nobj,GLU_NURBS_ERROR26);
+ case GLU_SAMPLING_TOLERANCE:
+ if (value <= 0.0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return;
+ }
+ nobj->sampling_tolerance = value;
+ break;
+ case GLU_PARAMETRIC_TOLERANCE:
+ if (value <= 0.0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return;
+ }
+ nobj->parametric_tolerance = value;
+ break;
+ case GLU_U_STEP:
+ if (value <= 0.0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return;
+ }
+ nobj->u_step = (GLint) value;
+ break;
+ case GLU_V_STEP:
+ if (value <= 0.0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return;
+ }
+ nobj->v_step = (GLint) value;
+ break;
+ case GLU_SAMPLING_METHOD:
+ val = (GLenum) value;
+ if (val != GLU_PATH_LENGTH && val != GLU_PARAMETRIC_ERROR
+ && val != GLU_DOMAIN_DISTANCE) {
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ return;
+ }
+ nobj->sampling_method = val;
+ break;
+ case GLU_DISPLAY_MODE:
+ val = (GLenum) value;
+ if (val != GLU_FILL && val != GLU_OUTLINE_POLYGON
+ && val != GLU_OUTLINE_PATCH) {
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ return;
+ }
+ if (nobj->nurbs_type == GLU_NURBS_CURVE) {
+ call_user_error(nobj, GLU_NURBS_ERROR26);
+ return;
+ }
+ nobj->display_mode = val;
+ if (val == GLU_OUTLINE_PATCH)
+ fprintf(stderr,
+ "NURBS, for the moment, can display only in POLYGON mode\n");
+ break;
+ case GLU_CULLING:
+ val = (GLenum) value;
+ if (val != GL_TRUE && val != GL_FALSE) {
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ return;
+ }
+ nobj->culling = (GLboolean) value;
+ break;
+ case GLU_AUTO_LOAD_MATRIX:
+ val = (GLenum) value;
+ if (val != GL_TRUE && val != GL_FALSE) {
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ return;
+ }
+ nobj->auto_load_matrix = (GLboolean) value;
+ break;
+ default:
+ call_user_error(nobj, GLU_NURBS_ERROR26);
}
}
-void GLAPIENTRY gluGetNurbsProperty( GLUnurbsObj *nobj, GLenum property, GLfloat *value )
+void GLAPIENTRY
+gluGetNurbsProperty(GLUnurbsObj * nobj, GLenum property, GLfloat * value)
{
switch (property) {
- case GLU_SAMPLING_TOLERANCE:
- *value = nobj->sampling_tolerance;
- break;
- case GLU_DISPLAY_MODE:
- *value = (GLfloat) (GLint) nobj->display_mode;
- break;
- case GLU_CULLING:
- *value = nobj->culling ? 1.0 : 0.0;
- break;
- case GLU_AUTO_LOAD_MATRIX:
- *value = nobj->auto_load_matrix ? 1.0 : 0.0;
- break;
- default:
- call_user_error(nobj,GLU_INVALID_ENUM);
+ case GLU_SAMPLING_TOLERANCE:
+ *value = nobj->sampling_tolerance;
+ break;
+ case GLU_DISPLAY_MODE:
+ *value = (GLfloat) (GLint) nobj->display_mode;
+ break;
+ case GLU_CULLING:
+ *value = nobj->culling ? 1.0 : 0.0;
+ break;
+ case GLU_AUTO_LOAD_MATRIX:
+ *value = nobj->auto_load_matrix ? 1.0 : 0.0;
+ break;
+ default:
+ call_user_error(nobj, GLU_INVALID_ENUM);
}
}
-void GLAPIENTRY gluBeginCurve( GLUnurbsObj *nobj )
+void GLAPIENTRY
+gluBeginCurve(GLUnurbsObj * nobj)
{
- if(nobj->nurbs_type==GLU_NURBS_CURVE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR6);
- return;
- }
- nobj->nurbs_type=GLU_NURBS_CURVE;
- nobj->curve.geom.type=GLU_INVALID_ENUM;
- nobj->curve.color.type=GLU_INVALID_ENUM;
- nobj->curve.texture.type=GLU_INVALID_ENUM;
- nobj->curve.normal.type=GLU_INVALID_ENUM;
+ if (nobj->nurbs_type == GLU_NURBS_CURVE) {
+ call_user_error(nobj, GLU_NURBS_ERROR6);
+ return;
+ }
+ nobj->nurbs_type = GLU_NURBS_CURVE;
+ nobj->curve.geom.type = GLU_INVALID_ENUM;
+ nobj->curve.color.type = GLU_INVALID_ENUM;
+ nobj->curve.texture.type = GLU_INVALID_ENUM;
+ nobj->curve.normal.type = GLU_INVALID_ENUM;
}
-void GLAPIENTRY gluEndCurve( GLUnurbsObj * nobj )
+void GLAPIENTRY
+gluEndCurve(GLUnurbsObj * nobj)
{
- if(nobj->nurbs_type==GLU_NURBS_NONE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR7);
- return;
- }
- if(nobj->curve.geom.type==GLU_INVALID_ENUM)
- {
- call_user_error(nobj,GLU_NURBS_ERROR8);
- nobj->nurbs_type=GLU_NURBS_NONE;
- return;
- }
- glPushAttrib( (GLbitfield) (GL_EVAL_BIT | GL_ENABLE_BIT) );
- glDisable(GL_MAP1_VERTEX_3);
- glDisable(GL_MAP1_VERTEX_4);
- glDisable(GL_MAP1_INDEX);
- glDisable(GL_MAP1_COLOR_4);
- glDisable(GL_MAP1_NORMAL);
- glDisable(GL_MAP1_TEXTURE_COORD_1);
- glDisable(GL_MAP1_TEXTURE_COORD_2);
- glDisable(GL_MAP1_TEXTURE_COORD_3);
- glDisable(GL_MAP1_TEXTURE_COORD_4);
- glDisable(GL_MAP2_VERTEX_3);
- glDisable(GL_MAP2_VERTEX_4);
- glDisable(GL_MAP2_INDEX);
- glDisable(GL_MAP2_COLOR_4);
- glDisable(GL_MAP2_NORMAL);
- glDisable(GL_MAP2_TEXTURE_COORD_1);
- glDisable(GL_MAP2_TEXTURE_COORD_2);
- glDisable(GL_MAP2_TEXTURE_COORD_3);
- glDisable(GL_MAP2_TEXTURE_COORD_4);
- do_nurbs_curve(nobj);
- glPopAttrib();
- nobj->nurbs_type=GLU_NURBS_NONE;
+ if (nobj->nurbs_type == GLU_NURBS_NONE) {
+ call_user_error(nobj, GLU_NURBS_ERROR7);
+ return;
+ }
+ if (nobj->curve.geom.type == GLU_INVALID_ENUM) {
+ call_user_error(nobj, GLU_NURBS_ERROR8);
+ nobj->nurbs_type = GLU_NURBS_NONE;
+ return;
+ }
+ glPushAttrib((GLbitfield) (GL_EVAL_BIT | GL_ENABLE_BIT));
+ glDisable(GL_MAP1_VERTEX_3);
+ glDisable(GL_MAP1_VERTEX_4);
+ glDisable(GL_MAP1_INDEX);
+ glDisable(GL_MAP1_COLOR_4);
+ glDisable(GL_MAP1_NORMAL);
+ glDisable(GL_MAP1_TEXTURE_COORD_1);
+ glDisable(GL_MAP1_TEXTURE_COORD_2);
+ glDisable(GL_MAP1_TEXTURE_COORD_3);
+ glDisable(GL_MAP1_TEXTURE_COORD_4);
+ glDisable(GL_MAP2_VERTEX_3);
+ glDisable(GL_MAP2_VERTEX_4);
+ glDisable(GL_MAP2_INDEX);
+ glDisable(GL_MAP2_COLOR_4);
+ glDisable(GL_MAP2_NORMAL);
+ glDisable(GL_MAP2_TEXTURE_COORD_1);
+ glDisable(GL_MAP2_TEXTURE_COORD_2);
+ glDisable(GL_MAP2_TEXTURE_COORD_3);
+ glDisable(GL_MAP2_TEXTURE_COORD_4);
+ do_nurbs_curve(nobj);
+ glPopAttrib();
+ nobj->nurbs_type = GLU_NURBS_NONE;
}
-void GLAPIENTRY gluNurbsCurve( GLUnurbsObj *nobj, GLint nknots, GLfloat *knot,
- GLint stride, GLfloat *ctlarray, GLint order, GLenum type )
+void GLAPIENTRY
+gluNurbsCurve(GLUnurbsObj * nobj, GLint nknots, GLfloat * knot,
+ GLint stride, GLfloat * ctlarray, GLint order, GLenum type)
{
- if(nobj->nurbs_type==GLU_NURBS_TRIM)
- {
+ if (nobj->nurbs_type == GLU_NURBS_TRIM) {
#if 0
/* TODO: NOT IMPLEMENTED YET */
- nurbs_trim *ptr1;
- trim_list *ptr2;
-
- if(type!=GLU_MAP1_TRIM_2 && type!=GLU_MAP1_TRIM_3)
- {
- call_user_error(nobj,GLU_NURBS_ERROR14);
- return;
- }
- for(ptr1=nobj->trim;ptr1->next;ptr1=ptr1->next);
- if(ptr1->trim_loop)
- {
- for(ptr2=ptr1->trim_loop;ptr2->next;ptr2=ptr2->next);
- if((ptr2->next=(trim_list *)malloc(sizeof(trim_list)))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return;
- }
- ptr2=ptr2->next;
- }
- else
- {
- if((ptr2=(trim_list *)malloc(sizeof(trim_list)))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return;
- }
- ptr1->trim_loop=ptr2;
- }
- ptr2->trim_type=GLU_TRIM_NURBS;
- ptr2->curve.nurbs_curve.knot_count=nknots;
- ptr2->curve.nurbs_curve.knot=knot;
- ptr2->curve.nurbs_curve.stride=stride;
- ptr2->curve.nurbs_curve.ctrlarray=ctlarray;
- ptr2->curve.nurbs_curve.order=order;
- ptr2->curve.nurbs_curve.dim= (type==GLU_MAP1_TRIM_2 ? 2 : 3 );
- ptr2->curve.nurbs_curve.type=type;
- ptr2->next=NULL;
+ nurbs_trim *ptr1;
+ trim_list *ptr2;
+
+ if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
+ call_user_error(nobj, GLU_NURBS_ERROR14);
+ return;
+ }
+ for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
+ if (ptr1->trim_loop) {
+ for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
+ if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ ptr2 = ptr2->next;
+ }
+ else {
+ if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ ptr1->trim_loop = ptr2;
+ }
+ ptr2->trim_type = GLU_TRIM_NURBS;
+ ptr2->curve.nurbs_curve.knot_count = nknots;
+ ptr2->curve.nurbs_curve.knot = knot;
+ ptr2->curve.nurbs_curve.stride = stride;
+ ptr2->curve.nurbs_curve.ctrlarray = ctlarray;
+ ptr2->curve.nurbs_curve.order = order;
+ ptr2->curve.nurbs_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
+ ptr2->curve.nurbs_curve.type = type;
+ ptr2->next = NULL;
#endif
- }
- else
- {
- if(type==GLU_MAP1_TRIM_2 || type==GLU_MAP1_TRIM_3)
- {
- call_user_error(nobj,GLU_NURBS_ERROR22);
- return;
- }
- if(nobj->nurbs_type!=GLU_NURBS_CURVE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR10);
- return;
- }
- switch(type)
- {
- case GL_MAP1_VERTEX_3:
- case GL_MAP1_VERTEX_4:
- if(nobj->curve.geom.type!=GLU_INVALID_ENUM)
- {
- call_user_error(nobj,GLU_NURBS_ERROR8);
- return;
- }
- nobj->curve.geom.type=type;
- nobj->curve.geom.knot_count=nknots;
- nobj->curve.geom.knot=knot;
- nobj->curve.geom.stride=stride;
- nobj->curve.geom.ctrlarray=ctlarray;
- nobj->curve.geom.order=order;
- break;
- case GL_MAP1_INDEX:
- case GL_MAP1_COLOR_4:
- nobj->curve.color.type=type;
- nobj->curve.color.knot_count=nknots;
- nobj->curve.color.knot=knot;
- nobj->curve.color.stride=stride;
- nobj->curve.color.ctrlarray=ctlarray;
- nobj->curve.color.order=order;
- break;
- case GL_MAP1_NORMAL:
- nobj->curve.normal.type=type;
- nobj->curve.normal.knot_count=nknots;
- nobj->curve.normal.knot=knot;
- nobj->curve.normal.stride=stride;
- nobj->curve.normal.ctrlarray=ctlarray;
- nobj->curve.normal.order=order;
- break;
- case GL_MAP1_TEXTURE_COORD_1:
- case GL_MAP1_TEXTURE_COORD_2:
- case GL_MAP1_TEXTURE_COORD_3:
- case GL_MAP1_TEXTURE_COORD_4:
- nobj->curve.texture.type=type;
- nobj->curve.texture.knot_count=nknots;
- nobj->curve.texture.knot=knot;
- nobj->curve.texture.stride=stride;
- nobj->curve.texture.ctrlarray=ctlarray;
- nobj->curve.texture.order=order;
- break;
- default:
- call_user_error(nobj,GLU_INVALID_ENUM);
- }
- }
+ }
+ else {
+ if (type == GLU_MAP1_TRIM_2 || type == GLU_MAP1_TRIM_3) {
+ call_user_error(nobj, GLU_NURBS_ERROR22);
+ return;
+ }
+ if (nobj->nurbs_type != GLU_NURBS_CURVE) {
+ call_user_error(nobj, GLU_NURBS_ERROR10);
+ return;
+ }
+ switch (type) {
+ case GL_MAP1_VERTEX_3:
+ case GL_MAP1_VERTEX_4:
+ if (nobj->curve.geom.type != GLU_INVALID_ENUM) {
+ call_user_error(nobj, GLU_NURBS_ERROR8);
+ return;
+ }
+ nobj->curve.geom.type = type;
+ nobj->curve.geom.knot_count = nknots;
+ nobj->curve.geom.knot = knot;
+ nobj->curve.geom.stride = stride;
+ nobj->curve.geom.ctrlarray = ctlarray;
+ nobj->curve.geom.order = order;
+ break;
+ case GL_MAP1_INDEX:
+ case GL_MAP1_COLOR_4:
+ nobj->curve.color.type = type;
+ nobj->curve.color.knot_count = nknots;
+ nobj->curve.color.knot = knot;
+ nobj->curve.color.stride = stride;
+ nobj->curve.color.ctrlarray = ctlarray;
+ nobj->curve.color.order = order;
+ break;
+ case GL_MAP1_NORMAL:
+ nobj->curve.normal.type = type;
+ nobj->curve.normal.knot_count = nknots;
+ nobj->curve.normal.knot = knot;
+ nobj->curve.normal.stride = stride;
+ nobj->curve.normal.ctrlarray = ctlarray;
+ nobj->curve.normal.order = order;
+ break;
+ case GL_MAP1_TEXTURE_COORD_1:
+ case GL_MAP1_TEXTURE_COORD_2:
+ case GL_MAP1_TEXTURE_COORD_3:
+ case GL_MAP1_TEXTURE_COORD_4:
+ nobj->curve.texture.type = type;
+ nobj->curve.texture.knot_count = nknots;
+ nobj->curve.texture.knot = knot;
+ nobj->curve.texture.stride = stride;
+ nobj->curve.texture.ctrlarray = ctlarray;
+ nobj->curve.texture.order = order;
+ break;
+ default:
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ }
+ }
}
-void GLAPIENTRY gluBeginSurface( GLUnurbsObj *nobj )
+void GLAPIENTRY
+gluBeginSurface(GLUnurbsObj * nobj)
{
- switch(nobj->nurbs_type)
- {
- case GLU_NURBS_NONE:
- nobj->nurbs_type=GLU_NURBS_SURFACE;
- nobj->surface.geom.type=GLU_INVALID_ENUM;
- nobj->surface.color.type=GLU_INVALID_ENUM;
- nobj->surface.texture.type=GLU_INVALID_ENUM;
- nobj->surface.normal.type=GLU_INVALID_ENUM;
- break;
- case GLU_NURBS_TRIM:
- call_user_error(nobj,GLU_NURBS_ERROR16);
- break;
- case GLU_NURBS_SURFACE:
- case GLU_NURBS_NO_TRIM:
- case GLU_NURBS_TRIM_DONE:
- call_user_error(nobj,GLU_NURBS_ERROR27);
- break;
- case GLU_NURBS_CURVE:
- call_user_error(nobj,GLU_NURBS_ERROR6);
- break;
- }
+ switch (nobj->nurbs_type) {
+ case GLU_NURBS_NONE:
+ nobj->nurbs_type = GLU_NURBS_SURFACE;
+ nobj->surface.geom.type = GLU_INVALID_ENUM;
+ nobj->surface.color.type = GLU_INVALID_ENUM;
+ nobj->surface.texture.type = GLU_INVALID_ENUM;
+ nobj->surface.normal.type = GLU_INVALID_ENUM;
+ break;
+ case GLU_NURBS_TRIM:
+ call_user_error(nobj, GLU_NURBS_ERROR16);
+ break;
+ case GLU_NURBS_SURFACE:
+ case GLU_NURBS_NO_TRIM:
+ case GLU_NURBS_TRIM_DONE:
+ call_user_error(nobj, GLU_NURBS_ERROR27);
+ break;
+ case GLU_NURBS_CURVE:
+ call_user_error(nobj, GLU_NURBS_ERROR6);
+ break;
+ }
}
-void GLAPIENTRY gluEndSurface( GLUnurbsObj * nobj )
+void GLAPIENTRY
+gluEndSurface(GLUnurbsObj * nobj)
{
- switch(nobj->nurbs_type)
- {
- case GLU_NURBS_NONE:
- call_user_error(nobj,GLU_NURBS_ERROR13);
- break;
- case GLU_NURBS_TRIM:
- call_user_error(nobj,GLU_NURBS_ERROR12);
- break;
- case GLU_NURBS_TRIM_DONE:
+ switch (nobj->nurbs_type) {
+ case GLU_NURBS_NONE:
+ call_user_error(nobj, GLU_NURBS_ERROR13);
+ break;
+ case GLU_NURBS_TRIM:
+ call_user_error(nobj, GLU_NURBS_ERROR12);
+ break;
+ case GLU_NURBS_TRIM_DONE:
/* if(nobj->trim->trim_loop==NULL)
{
call_user_error(nobj,GLU_NURBS_ERROR18);
return;
}*/
- /* no break - fallthrough */
- case GLU_NURBS_NO_TRIM:
- glPushAttrib( (GLbitfield)
- (GL_EVAL_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT) );
- glDisable(GL_MAP2_VERTEX_3);
- glDisable(GL_MAP2_VERTEX_4);
- glDisable(GL_MAP2_INDEX);
- glDisable(GL_MAP2_COLOR_4);
- glDisable(GL_MAP2_NORMAL);
- glDisable(GL_MAP2_TEXTURE_COORD_1);
- glDisable(GL_MAP2_TEXTURE_COORD_2);
- glDisable(GL_MAP2_TEXTURE_COORD_3);
- glDisable(GL_MAP2_TEXTURE_COORD_4);
+ /* no break - fallthrough */
+ case GLU_NURBS_NO_TRIM:
+ glPushAttrib((GLbitfield)
+ (GL_EVAL_BIT | GL_ENABLE_BIT | GL_POLYGON_BIT));
+ glDisable(GL_MAP2_VERTEX_3);
+ glDisable(GL_MAP2_VERTEX_4);
+ glDisable(GL_MAP2_INDEX);
+ glDisable(GL_MAP2_COLOR_4);
+ glDisable(GL_MAP2_NORMAL);
+ glDisable(GL_MAP2_TEXTURE_COORD_1);
+ glDisable(GL_MAP2_TEXTURE_COORD_2);
+ glDisable(GL_MAP2_TEXTURE_COORD_3);
+ glDisable(GL_MAP2_TEXTURE_COORD_4);
/* glDisable(GL_MAP1_VERTEX_3);
glDisable(GL_MAP1_VERTEX_4);
glDisable(GL_MAP1_INDEX);
glDisable(GL_MAP1_TEXTURE_COORD_2);
glDisable(GL_MAP1_TEXTURE_COORD_3);
glDisable(GL_MAP1_TEXTURE_COORD_4);*/
- do_nurbs_surface(nobj);
- glPopAttrib();
- break;
- default:
- call_user_error(nobj,GLU_NURBS_ERROR8);
- }
- nobj->nurbs_type=GLU_NURBS_NONE;
+ do_nurbs_surface(nobj);
+ glPopAttrib();
+ break;
+ default:
+ call_user_error(nobj, GLU_NURBS_ERROR8);
+ }
+ nobj->nurbs_type = GLU_NURBS_NONE;
}
-void GLAPIENTRY gluNurbsSurface( GLUnurbsObj *nobj,
- GLint sknot_count, GLfloat *sknot,
- GLint tknot_count, GLfloat *tknot,
- GLint s_stride, GLint t_stride,
- GLfloat *ctrlarray,
- GLint sorder, GLint torder,
- GLenum type )
+void GLAPIENTRY
+gluNurbsSurface(GLUnurbsObj * nobj,
+ GLint sknot_count, GLfloat * sknot,
+ GLint tknot_count, GLfloat * tknot,
+ GLint s_stride, GLint t_stride,
+ GLfloat * ctrlarray, GLint sorder, GLint torder, GLenum type)
{
- if(nobj->nurbs_type==GLU_NURBS_NO_TRIM || nobj->nurbs_type==GLU_NURBS_TRIM ||
- nobj->nurbs_type==GLU_NURBS_TRIM_DONE)
- {
- if(type==GL_MAP2_VERTEX_3 || type==GL_MAP2_VERTEX_4)
- {
- call_user_error(nobj,GLU_NURBS_ERROR8);
- return;
- }
- }
- else
- if(nobj->nurbs_type!=GLU_NURBS_SURFACE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR11);
- return;
- }
- switch(type)
- {
- case GL_MAP2_VERTEX_3:
- case GL_MAP2_VERTEX_4:
- nobj->surface.geom.sknot_count=sknot_count;
- nobj->surface.geom.sknot=sknot;
- nobj->surface.geom.tknot_count=tknot_count;
- nobj->surface.geom.tknot=tknot;
- nobj->surface.geom.s_stride=s_stride;
- nobj->surface.geom.t_stride=t_stride;
- nobj->surface.geom.ctrlarray=ctrlarray;
- nobj->surface.geom.sorder=sorder;
- nobj->surface.geom.torder=torder;
- nobj->surface.geom.type=type;
- nobj->nurbs_type=GLU_NURBS_NO_TRIM;
- break;
- case GL_MAP2_INDEX:
- case GL_MAP2_COLOR_4:
- nobj->surface.color.sknot_count=sknot_count;
- nobj->surface.color.sknot=sknot;
- nobj->surface.color.tknot_count=tknot_count;
- nobj->surface.color.tknot=tknot;
- nobj->surface.color.s_stride=s_stride;
- nobj->surface.color.t_stride=t_stride;
- nobj->surface.color.ctrlarray=ctrlarray;
- nobj->surface.color.sorder=sorder;
- nobj->surface.color.torder=torder;
- nobj->surface.color.type=type;
- break;
- case GL_MAP2_NORMAL:
- nobj->surface.normal.sknot_count=sknot_count;
- nobj->surface.normal.sknot=sknot;
- nobj->surface.normal.tknot_count=tknot_count;
- nobj->surface.normal.tknot=tknot;
- nobj->surface.normal.s_stride=s_stride;
- nobj->surface.normal.t_stride=t_stride;
- nobj->surface.normal.ctrlarray=ctrlarray;
- nobj->surface.normal.sorder=sorder;
- nobj->surface.normal.torder=torder;
- nobj->surface.normal.type=type;
- break;
- case GL_MAP2_TEXTURE_COORD_1:
- case GL_MAP2_TEXTURE_COORD_2:
- case GL_MAP2_TEXTURE_COORD_3:
- case GL_MAP2_TEXTURE_COORD_4:
- nobj->surface.texture.sknot_count=sknot_count;
- nobj->surface.texture.sknot=sknot;
- nobj->surface.texture.tknot_count=tknot_count;
- nobj->surface.texture.tknot=tknot;
- nobj->surface.texture.s_stride=s_stride;
- nobj->surface.texture.t_stride=t_stride;
- nobj->surface.texture.ctrlarray=ctrlarray;
- nobj->surface.texture.sorder=sorder;
- nobj->surface.texture.torder=torder;
- nobj->surface.texture.type=type;
- break;
- default:
- call_user_error(nobj,GLU_INVALID_ENUM);
- }
+ if (nobj->nurbs_type == GLU_NURBS_NO_TRIM
+ || nobj->nurbs_type == GLU_NURBS_TRIM
+ || nobj->nurbs_type == GLU_NURBS_TRIM_DONE) {
+ if (type == GL_MAP2_VERTEX_3 || type == GL_MAP2_VERTEX_4) {
+ call_user_error(nobj, GLU_NURBS_ERROR8);
+ return;
+ }
+ }
+ else if (nobj->nurbs_type != GLU_NURBS_SURFACE) {
+ call_user_error(nobj, GLU_NURBS_ERROR11);
+ return;
+ }
+ switch (type) {
+ case GL_MAP2_VERTEX_3:
+ case GL_MAP2_VERTEX_4:
+ nobj->surface.geom.sknot_count = sknot_count;
+ nobj->surface.geom.sknot = sknot;
+ nobj->surface.geom.tknot_count = tknot_count;
+ nobj->surface.geom.tknot = tknot;
+ nobj->surface.geom.s_stride = s_stride;
+ nobj->surface.geom.t_stride = t_stride;
+ nobj->surface.geom.ctrlarray = ctrlarray;
+ nobj->surface.geom.sorder = sorder;
+ nobj->surface.geom.torder = torder;
+ nobj->surface.geom.type = type;
+ nobj->nurbs_type = GLU_NURBS_NO_TRIM;
+ break;
+ case GL_MAP2_INDEX:
+ case GL_MAP2_COLOR_4:
+ nobj->surface.color.sknot_count = sknot_count;
+ nobj->surface.color.sknot = sknot;
+ nobj->surface.color.tknot_count = tknot_count;
+ nobj->surface.color.tknot = tknot;
+ nobj->surface.color.s_stride = s_stride;
+ nobj->surface.color.t_stride = t_stride;
+ nobj->surface.color.ctrlarray = ctrlarray;
+ nobj->surface.color.sorder = sorder;
+ nobj->surface.color.torder = torder;
+ nobj->surface.color.type = type;
+ break;
+ case GL_MAP2_NORMAL:
+ nobj->surface.normal.sknot_count = sknot_count;
+ nobj->surface.normal.sknot = sknot;
+ nobj->surface.normal.tknot_count = tknot_count;
+ nobj->surface.normal.tknot = tknot;
+ nobj->surface.normal.s_stride = s_stride;
+ nobj->surface.normal.t_stride = t_stride;
+ nobj->surface.normal.ctrlarray = ctrlarray;
+ nobj->surface.normal.sorder = sorder;
+ nobj->surface.normal.torder = torder;
+ nobj->surface.normal.type = type;
+ break;
+ case GL_MAP2_TEXTURE_COORD_1:
+ case GL_MAP2_TEXTURE_COORD_2:
+ case GL_MAP2_TEXTURE_COORD_3:
+ case GL_MAP2_TEXTURE_COORD_4:
+ nobj->surface.texture.sknot_count = sknot_count;
+ nobj->surface.texture.sknot = sknot;
+ nobj->surface.texture.tknot_count = tknot_count;
+ nobj->surface.texture.tknot = tknot;
+ nobj->surface.texture.s_stride = s_stride;
+ nobj->surface.texture.t_stride = t_stride;
+ nobj->surface.texture.ctrlarray = ctrlarray;
+ nobj->surface.texture.sorder = sorder;
+ nobj->surface.texture.torder = torder;
+ nobj->surface.texture.type = type;
+ break;
+ default:
+ call_user_error(nobj, GLU_INVALID_ENUM);
+ }
}
void GLAPIENTRY
-gluNurbsCallback( GLUnurbsObj *nobj, GLenum which, void (GLCALLBACKP fn)())
+gluNurbsCallback(GLUnurbsObj * nobj, GLenum which, void (GLCALLBACK * fn) ())
{
- nobj->error_callback = (void(GLCALLBACKPCAST)(GLenum))fn;
+ nobj->error_callback = (void (GLCALLBACKPCAST) (GLenum)) fn;
- if(which!=GLU_ERROR)
- call_user_error(nobj,GLU_INVALID_ENUM);
+ if (which != GLU_ERROR)
+ call_user_error(nobj, GLU_INVALID_ENUM);
}
void GLAPIENTRY
-gluBeginTrim( GLUnurbsObj *nobj )
+gluBeginTrim(GLUnurbsObj * nobj)
{
#if 0
- nurbs_trim *ptr;
+ nurbs_trim *ptr;
#endif
- if(nobj->nurbs_type!=GLU_NURBS_TRIM_DONE)
- if(nobj->nurbs_type!=GLU_NURBS_NO_TRIM)
- {
- call_user_error(nobj,GLU_NURBS_ERROR15);
- return;
- }
- nobj->nurbs_type=GLU_NURBS_TRIM;
-fprintf(stderr,"NURBS - trimming not supported yet\n");
+ if (nobj->nurbs_type != GLU_NURBS_TRIM_DONE)
+ if (nobj->nurbs_type != GLU_NURBS_NO_TRIM) {
+ call_user_error(nobj, GLU_NURBS_ERROR15);
+ return;
+ }
+ nobj->nurbs_type = GLU_NURBS_TRIM;
+ fprintf(stderr, "NURBS - trimming not supported yet\n");
#if 0
- if((ptr=(nurbs_trim *)malloc(sizeof(nurbs_trim)))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return;
- }
- if(nobj->trim)
- {
- nurbs_trim *tmp_ptr;
-
- for(tmp_ptr=nobj->trim;tmp_ptr->next;tmp_ptr=tmp_ptr->next);
- tmp_ptr->next=ptr;
- }
- else
- nobj->trim=ptr;
- ptr->trim_loop=NULL;
- ptr->segments=NULL;
- ptr->next=NULL;
+ if ((ptr = (nurbs_trim *) malloc(sizeof(nurbs_trim))) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ if (nobj->trim) {
+ nurbs_trim *tmp_ptr;
+
+ for (tmp_ptr = nobj->trim; tmp_ptr->next; tmp_ptr = tmp_ptr->next);
+ tmp_ptr->next = ptr;
+ }
+ else
+ nobj->trim = ptr;
+ ptr->trim_loop = NULL;
+ ptr->segments = NULL;
+ ptr->next = NULL;
#endif
}
void GLAPIENTRY
-gluPwlCurve( GLUnurbsObj *nobj, GLint count, GLfloat *array, GLint stride,
- GLenum type)
+gluPwlCurve(GLUnurbsObj * nobj, GLint count, GLfloat * array, GLint stride,
+ GLenum type)
{
#if 0
- nurbs_trim *ptr1;
- trim_list *ptr2;
+ nurbs_trim *ptr1;
+ trim_list *ptr2;
#endif
- if(nobj->nurbs_type==GLU_NURBS_CURVE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR9);
- return;
- }
- if(nobj->nurbs_type==GLU_NURBS_NONE)
- {
- call_user_error(nobj,GLU_NURBS_ERROR19);
- return;
- }
- if(type!=GLU_MAP1_TRIM_2 && type!=GLU_MAP1_TRIM_3)
- {
- call_user_error(nobj,GLU_NURBS_ERROR14);
- return;
- }
+ if (nobj->nurbs_type == GLU_NURBS_CURVE) {
+ call_user_error(nobj, GLU_NURBS_ERROR9);
+ return;
+ }
+ if (nobj->nurbs_type == GLU_NURBS_NONE) {
+ call_user_error(nobj, GLU_NURBS_ERROR19);
+ return;
+ }
+ if (type != GLU_MAP1_TRIM_2 && type != GLU_MAP1_TRIM_3) {
+ call_user_error(nobj, GLU_NURBS_ERROR14);
+ return;
+ }
#if 0
- for(ptr1=nobj->trim;ptr1->next;ptr1=ptr1->next);
- if(ptr1->trim_loop)
- {
- for(ptr2=ptr1->trim_loop;ptr2->next;ptr2=ptr2->next);
- if((ptr2->next=(trim_list *)malloc(sizeof(trim_list)))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return;
- }
- ptr2=ptr2->next;
- }
- else
- {
- if((ptr2=(trim_list *)malloc(sizeof(trim_list)))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return;
- }
- ptr1->trim_loop=ptr2;
- }
- ptr2->trim_type=GLU_TRIM_PWL;
- ptr2->curve.pwl_curve.pt_count=count;
- ptr2->curve.pwl_curve.ctrlarray=array;
- ptr2->curve.pwl_curve.stride=stride;
- ptr2->curve.pwl_curve.dim= (type==GLU_MAP1_TRIM_2 ? 2 : 3 );
- ptr2->curve.pwl_curve.type=type;
- ptr2->next=NULL;
+ for (ptr1 = nobj->trim; ptr1->next; ptr1 = ptr1->next);
+ if (ptr1->trim_loop) {
+ for (ptr2 = ptr1->trim_loop; ptr2->next; ptr2 = ptr2->next);
+ if ((ptr2->next = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ ptr2 = ptr2->next;
+ }
+ else {
+ if ((ptr2 = (trim_list *) malloc(sizeof(trim_list))) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ ptr1->trim_loop = ptr2;
+ }
+ ptr2->trim_type = GLU_TRIM_PWL;
+ ptr2->curve.pwl_curve.pt_count = count;
+ ptr2->curve.pwl_curve.ctrlarray = array;
+ ptr2->curve.pwl_curve.stride = stride;
+ ptr2->curve.pwl_curve.dim = (type == GLU_MAP1_TRIM_2 ? 2 : 3);
+ ptr2->curve.pwl_curve.type = type;
+ ptr2->next = NULL;
#endif
}
void GLAPIENTRY
-gluEndTrim( GLUnurbsObj *nobj )
+gluEndTrim(GLUnurbsObj * nobj)
{
- if(nobj->nurbs_type!=GLU_NURBS_TRIM)
- {
- call_user_error(nobj,GLU_NURBS_ERROR17);
- return;
- }
- nobj->nurbs_type=GLU_NURBS_TRIM_DONE;
+ if (nobj->nurbs_type != GLU_NURBS_TRIM) {
+ call_user_error(nobj, GLU_NURBS_ERROR17);
+ return;
+ }
+ nobj->nurbs_type = GLU_NURBS_TRIM_DONE;
}
-
-/* $Id: nurbs.h,v 1.2 1999/11/11 03:21:43 kendallb Exp $ */
+/* $Id: nurbs.h,v 1.3 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- * Copyright (C) 1995-1999 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: nurbs.h,v $
- * Revision 1.2 1999/11/11 03:21:43 kendallb
- *
- * . Updated GL/gl.h with GLCALLACKP and GLAPIENTRYP macros for compatibility
- * with the IBM VisualAge C++ compiler. Eventually some more code will be
- * needed in the headers to enable the reversal of (__stdcall*) to (*__stdcall)
- * for the IBM compilers, however we currently build using our own header files
- * that already handle this.
- *
- * . Changed instances of (GLCALLBACK*) to GLCALLBACKP for compatibility
- * with the IBM VisualAge C++ compiler in src-glu.
- *
- * . Misc cleanups for warnings generated with Watcom C++ in src-glu. Compiles
- * with 0 warnings now.
- *
- * . tess_hash.c: line 244 - Why is this function stubbed out? I removed the
- * code with a #if 0 to avoid a compiler warning, but it looks dangerous.
- *
- * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
- * Imported sources
- *
- * Revision 1.5 1999/02/27 13:55:31 brianp
- * fixed BeOS-related GLU typedef problems
- *
- * Revision 1.4 1999/01/03 03:23:15 brianp
- * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
- *
- * Revision 1.3 1997/05/27 03:18:23 brianp
- * minor clean-up
- *
- * Revision 1.2 1997/05/27 03:00:16 brianp
- * incorporated Bogdan's new NURBS code
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
-/*
* NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
* See README2 for more info.
*/
#define NURBS_H
-#define EPSILON 1e-06 /* epsilon for double precision compares */
+#define EPSILON 1e-06 /* epsilon for double precision compares */
typedef enum
{
- GLU_NURBS_CURVE, GLU_NURBS_SURFACE, GLU_NURBS_TRIM, GLU_NURBS_NO_TRIM,
- GLU_NURBS_TRIM_DONE, GLU_NURBS_NONE
-} GLU_nurbs_enum;
+ GLU_NURBS_CURVE, GLU_NURBS_SURFACE, GLU_NURBS_TRIM, GLU_NURBS_NO_TRIM,
+ GLU_NURBS_TRIM_DONE, GLU_NURBS_NONE
+}
+GLU_nurbs_enum;
typedef enum
{
- GLU_TRIM_NURBS, GLU_TRIM_PWL
-} GLU_trim_enum;
+ GLU_TRIM_NURBS, GLU_TRIM_PWL
+}
+GLU_trim_enum;
typedef struct
{
- GLint sknot_count;
- GLfloat *sknot;
- GLint tknot_count;
- GLfloat *tknot;
- GLint s_stride;
- GLint t_stride;
- GLfloat *ctrlarray;
- GLint sorder;
- GLint torder;
- GLint dim;
- GLenum type;
-} surface_attribs;
+ GLint sknot_count;
+ GLfloat *sknot;
+ GLint tknot_count;
+ GLfloat *tknot;
+ GLint s_stride;
+ GLint t_stride;
+ GLfloat *ctrlarray;
+ GLint sorder;
+ GLint torder;
+ GLint dim;
+ GLenum type;
+}
+surface_attribs;
typedef struct
{
- surface_attribs geom;
- surface_attribs color;
- surface_attribs texture;
- surface_attribs normal;
-} nurbs_surface;
+ surface_attribs geom;
+ surface_attribs color;
+ surface_attribs texture;
+ surface_attribs normal;
+}
+nurbs_surface;
typedef struct
{
- GLint knot_count;
- GLfloat *knot;
- GLint stride;
- GLfloat *ctrlarray;
- GLint order;
- GLint dim;
- GLenum type;
-} curve_attribs;
+ GLint knot_count;
+ GLfloat *knot;
+ GLint stride;
+ GLfloat *ctrlarray;
+ GLint order;
+ GLint dim;
+ GLenum type;
+}
+curve_attribs;
typedef struct
{
- GLint pt_count;
- GLfloat *ctrlarray;
- GLint stride;
- GLint dim;
- GLenum type;
-} pwl_curve_attribs;
+ GLint pt_count;
+ GLfloat *ctrlarray;
+ GLint stride;
+ GLint dim;
+ GLenum type;
+}
+pwl_curve_attribs;
typedef struct
{
- curve_attribs geom;
- curve_attribs color;
- curve_attribs texture;
- curve_attribs normal;
-} nurbs_curve;
+ curve_attribs geom;
+ curve_attribs color;
+ curve_attribs texture;
+ curve_attribs normal;
+}
+nurbs_curve;
typedef struct trim_list_str
{
- GLU_trim_enum trim_type;
- union
- {
- pwl_curve_attribs pwl_curve;
- curve_attribs nurbs_curve;
- } curve;
- struct trim_list_str *next;
-} trim_list;
+ GLU_trim_enum trim_type;
+ union
+ {
+ pwl_curve_attribs pwl_curve;
+ curve_attribs nurbs_curve;
+ }
+ curve;
+ struct trim_list_str *next;
+}
+trim_list;
typedef struct seg_trim_str
{
- GLfloat *points;
- GLint pt_cnt,seg_array_len;
- struct seg_trim_str *next;
-} trim_segments;
+ GLfloat *points;
+ GLint pt_cnt, seg_array_len;
+ struct seg_trim_str *next;
+}
+trim_segments;
typedef struct nurbs_trim_str
{
- trim_list *trim_loop;
- trim_segments *segments;
- struct nurbs_trim_str *next;
-} nurbs_trim;
+ trim_list *trim_loop;
+ trim_segments *segments;
+ struct nurbs_trim_str *next;
+}
+nurbs_trim;
typedef struct
{
- GLfloat model[16],proj[16],viewport[4];
-} culling_and_sampling_str;
-
-struct GLUnurbs {
- GLboolean culling;
- GLenum error;
- void (GLCALLBACKP error_callback)( GLenum err );
- GLenum display_mode;
- GLU_nurbs_enum nurbs_type;
- GLboolean auto_load_matrix;
- culling_and_sampling_str
- sampling_matrices;
- GLenum sampling_method;
- GLfloat sampling_tolerance;
- GLfloat parametric_tolerance;
- GLint u_step, v_step;
- nurbs_surface surface;
- nurbs_curve curve;
- nurbs_trim *trim;
+ GLfloat model[16], proj[16], viewport[4];
+}
+culling_and_sampling_str;
+
+struct GLUnurbs
+{
+ GLboolean culling;
+ GLenum error;
+ void (GLCALLBACK * error_callback) (GLenum err);
+ GLenum display_mode;
+ GLU_nurbs_enum nurbs_type;
+ GLboolean auto_load_matrix;
+ culling_and_sampling_str sampling_matrices;
+ GLenum sampling_method;
+ GLfloat sampling_tolerance;
+ GLfloat parametric_tolerance;
+ GLint u_step, v_step;
+ nurbs_surface surface;
+ nurbs_curve curve;
+ nurbs_trim *trim;
};
typedef struct
{
- GLfloat *knot;
- GLint nknots;
- GLfloat *unified_knot;
- GLint unified_nknots;
- GLint order;
- GLint t_min,t_max;
- GLint delta_nknots;
- GLboolean open_at_begin,open_at_end;
- GLfloat *new_knot;
- GLfloat *alpha;
-} knot_str_type;
+ GLfloat *knot;
+ GLint nknots;
+ GLfloat *unified_knot;
+ GLint unified_nknots;
+ GLint order;
+ GLint t_min, t_max;
+ GLint delta_nknots;
+ GLboolean open_at_begin, open_at_end;
+ GLfloat *new_knot;
+ GLfloat *alpha;
+}
+knot_str_type;
typedef struct
{
- GLfloat *geom_ctrl;
- GLint geom_s_stride,geom_t_stride;
- GLfloat **geom_offsets;
- GLint geom_s_pt_cnt,geom_t_pt_cnt;
- GLfloat *color_ctrl;
- GLint color_s_stride,color_t_stride;
- GLfloat **color_offsets;
- GLint color_s_pt_cnt,color_t_pt_cnt;
- GLfloat *normal_ctrl;
- GLint normal_s_stride,normal_t_stride;
- GLfloat **normal_offsets;
- GLint normal_s_pt_cnt,normal_t_pt_cnt;
- GLfloat *texture_ctrl;
- GLint texture_s_stride,texture_t_stride;
- GLfloat **texture_offsets;
- GLint texture_s_pt_cnt,texture_t_pt_cnt;
- GLint s_bezier_cnt,t_bezier_cnt;
-} new_ctrl_type;
-
-extern void call_user_error( GLUnurbsObj *nobj, GLenum error );
-
-extern GLenum test_knot(GLint nknots, GLfloat *knot, GLint order);
-
-extern GLenum explode_knot(knot_str_type *the_knot);
-
-extern GLenum calc_alphas(knot_str_type *the_knot);
-
-extern GLenum calc_new_ctrl_pts(GLfloat *ctrl,GLint stride,knot_str_type *the_knot,
- GLint dim,GLfloat **new_ctrl,GLint *ncontrol);
-
-extern GLenum glu_do_sampling_crv(GLUnurbsObj *nobj, GLfloat *new_ctrl,GLint n_ctrl,
- GLint order,GLint dim,GLint **factors);
-
-extern GLenum glu_do_sampling_3D(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- int **sfactors, GLint **tfactors);
-
-extern GLenum glu_do_sampling_uv(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- int **sfactors, GLint **tfactors);
-
-extern GLenum glu_do_sampling_param_3D(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- int **sfactors, GLint **tfactors);
-
-extern GLboolean fine_culling_test_2D(GLUnurbsObj *nobj, GLfloat *ctrl, GLint n_ctrl,
- GLint stride, GLint dim);
-
-extern GLboolean fine_culling_test_3D(GLUnurbsObj *nobj, GLfloat *ctrl,
- GLint s_n_ctrl, GLint t_n_ctrl, GLint s_stride, GLint t_stride, GLint dim);
-
-extern void do_nurbs_curve( GLUnurbsObj *nobj);
-
-extern void do_nurbs_surface( GLUnurbsObj *nobj);
-
-extern GLenum patch_trimming(GLUnurbsObj *nobj,new_ctrl_type *new_ctrl,
- GLint *sfactors, GLint *tfactors);
-
-extern void collect_unified_knot(knot_str_type *dest, knot_str_type *src,
- GLfloat maximal_min_knot, GLfloat minimal_max_knot);
-
-extern GLenum select_knot_working_range(GLUnurbsObj *nobj,knot_str_type *geom_knot,
- knot_str_type *color_knot, knot_str_type *normal_knot,
- knot_str_type *texture_knot);
-
-extern void free_unified_knots(knot_str_type *geom_knot, knot_str_type *color_knot,
- knot_str_type *normal_knot, knot_str_type *texture_knot);
+ GLfloat *geom_ctrl;
+ GLint geom_s_stride, geom_t_stride;
+ GLfloat **geom_offsets;
+ GLint geom_s_pt_cnt, geom_t_pt_cnt;
+ GLfloat *color_ctrl;
+ GLint color_s_stride, color_t_stride;
+ GLfloat **color_offsets;
+ GLint color_s_pt_cnt, color_t_pt_cnt;
+ GLfloat *normal_ctrl;
+ GLint normal_s_stride, normal_t_stride;
+ GLfloat **normal_offsets;
+ GLint normal_s_pt_cnt, normal_t_pt_cnt;
+ GLfloat *texture_ctrl;
+ GLint texture_s_stride, texture_t_stride;
+ GLfloat **texture_offsets;
+ GLint texture_s_pt_cnt, texture_t_pt_cnt;
+ GLint s_bezier_cnt, t_bezier_cnt;
+}
+new_ctrl_type;
+
+extern void call_user_error(GLUnurbsObj * nobj, GLenum error);
+
+extern GLenum test_knot(GLint nknots, GLfloat * knot, GLint order);
+
+extern GLenum explode_knot(knot_str_type * the_knot);
+
+extern GLenum calc_alphas(knot_str_type * the_knot);
+
+extern GLenum calc_new_ctrl_pts(GLfloat * ctrl, GLint stride,
+ knot_str_type * the_knot, GLint dim,
+ GLfloat ** new_ctrl, GLint * ncontrol);
+
+extern GLenum glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * new_ctrl,
+ GLint n_ctrl, GLint order, GLint dim,
+ GLint ** factors);
+
+extern GLenum glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ int **sfactors, GLint ** tfactors);
+
+extern GLenum glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ int **sfactors, GLint ** tfactors);
+
+extern GLenum glu_do_sampling_param_3D(GLUnurbsObj * nobj,
+ new_ctrl_type * new_ctrl,
+ int **sfactors, GLint ** tfactors);
+
+extern GLboolean fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * ctrl,
+ GLint n_ctrl, GLint stride, GLint dim);
+
+extern GLboolean fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * ctrl,
+ GLint s_n_ctrl, GLint t_n_ctrl,
+ GLint s_stride, GLint t_stride,
+ GLint dim);
+
+extern void do_nurbs_curve(GLUnurbsObj * nobj);
+
+extern void do_nurbs_surface(GLUnurbsObj * nobj);
+
+extern GLenum patch_trimming(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ GLint * sfactors, GLint * tfactors);
+
+extern void collect_unified_knot(knot_str_type * dest, knot_str_type * src,
+ GLfloat maximal_min_knot,
+ GLfloat minimal_max_knot);
+
+extern GLenum select_knot_working_range(GLUnurbsObj * nobj,
+ knot_str_type * geom_knot,
+ knot_str_type * color_knot,
+ knot_str_type * normal_knot,
+ knot_str_type * texture_knot);
+
+extern void free_unified_knots(knot_str_type * geom_knot,
+ knot_str_type * color_knot,
+ knot_str_type * normal_knot,
+ knot_str_type * texture_knot);
-/* $Id: nurbscrv.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
+/* $Id: nurbscrv.c,v 1.2 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 2.4
- * Copyright (C) 1995-1997 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: nurbscrv.c,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.6 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.5 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.4 1997/05/27 03:21:22 brianp
- * minor clean-up
- *
- * Revision 1.3 1997/05/27 03:00:16 brianp
- * incorporated Bogdan's new NURBS code
- *
- * Revision 1.2 1996/09/27 23:12:22 brianp
- * added return 0 to get_surface_dim() to silence warning
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
-/*
* NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
* See README2 for more info.
*/
static int
get_curve_dim(GLenum type)
{
- switch(type)
- {
- case GL_MAP1_VERTEX_3: return 3;
- case GL_MAP1_VERTEX_4: return 4;
- case GL_MAP1_INDEX: return 1;
- case GL_MAP1_COLOR_4: return 4;
- case GL_MAP1_NORMAL: return 3;
- case GL_MAP1_TEXTURE_COORD_1: return 1;
- case GL_MAP1_TEXTURE_COORD_2: return 2;
- case GL_MAP1_TEXTURE_COORD_3: return 3;
- case GL_MAP1_TEXTURE_COORD_4: return 4;
- default: abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here*/
+ switch (type) {
+ case GL_MAP1_VERTEX_3:
+ return 3;
+ case GL_MAP1_VERTEX_4:
+ return 4;
+ case GL_MAP1_INDEX:
+ return 1;
+ case GL_MAP1_COLOR_4:
+ return 4;
+ case GL_MAP1_NORMAL:
+ return 3;
+ case GL_MAP1_TEXTURE_COORD_1:
+ return 1;
+ case GL_MAP1_TEXTURE_COORD_2:
+ return 2;
+ case GL_MAP1_TEXTURE_COORD_3:
+ return 3;
+ case GL_MAP1_TEXTURE_COORD_4:
+ return 4;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ return 0; /*never get here */
}
static GLenum
-test_nurbs_curve(GLUnurbsObj *nobj, curve_attribs *attribs)
+test_nurbs_curve(GLUnurbsObj * nobj, curve_attribs * attribs)
{
- GLenum err;
- GLint tmp_int;
+ GLenum err;
+ GLint tmp_int;
- if(attribs->order < 0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER,&tmp_int);
- if(attribs->order > tmp_int || attribs->order < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attribs->knot_count < attribs->order +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attribs->stride < 0)
- {
- call_user_error(nobj,GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if(attribs->knot==NULL || attribs->ctrlarray==NULL)
- {
- call_user_error(nobj,GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if((err=test_knot(attribs->knot_count,attribs->knot,attribs->order))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
+ if (attribs->order < 0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return GLU_ERROR;
+ }
+ glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
+ if (attribs->order > tmp_int || attribs->order < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attribs->knot_count < attribs->order + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attribs->stride < 0) {
+ call_user_error(nobj, GLU_NURBS_ERROR34);
+ return GLU_ERROR;
+ }
+ if (attribs->knot == NULL || attribs->ctrlarray == NULL) {
+ call_user_error(nobj, GLU_NURBS_ERROR36);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attribs->knot_count, attribs->knot, attribs->order))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ return GLU_NO_ERROR;
}
static GLenum
-test_nurbs_curves(GLUnurbsObj *nobj)
+test_nurbs_curves(GLUnurbsObj * nobj)
{
- /* test the geometric data */
- if(test_nurbs_curve(nobj,&(nobj->curve.geom))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if(nobj->curve.color.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.color))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if(nobj->curve.normal.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.normal))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if(nobj->curve.texture.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.texture))!=GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
+ /* test the geometric data */
+ if (test_nurbs_curve(nobj, &(nobj->curve.geom)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* now test the attributive data */
+ /* color */
+ if (nobj->curve.color.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.color)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* normal */
+ if (nobj->curve.normal.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.normal)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* texture */
+ if (nobj->curve.texture.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.texture)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ return GLU_NO_ERROR;
}
/* prepare the knot information structures */
static GLenum
-fill_knot_structures(GLUnurbsObj *nobj,knot_str_type *geom_knot,
- knot_str_type *color_knot, knot_str_type *normal_knot,
- knot_str_type *texture_knot)
+fill_knot_structures(GLUnurbsObj * nobj, knot_str_type * geom_knot,
+ knot_str_type * color_knot, knot_str_type * normal_knot,
+ knot_str_type * texture_knot)
{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min,t_max;
+ GLint order;
+ GLfloat *knot;
+ GLint nknots;
+ GLint t_min, t_max;
- geom_knot->unified_knot=NULL;
- knot=geom_knot->knot=nobj->curve.geom.knot;
- nknots=geom_knot->nknots=nobj->curve.geom.knot_count;
- order=geom_knot->order=nobj->curve.geom.order;
- geom_knot->delta_nknots=0;
- t_min=geom_knot->t_min=order-1;
- t_max=geom_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- geom_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_knot->open_at_end=GL_TRUE;
- }
- else
- geom_knot->open_at_end=GL_FALSE;
- if(nobj->curve.color.type!=GLU_INVALID_ENUM)
- {
- color_knot->unified_knot=(GLfloat *)1;
- knot=color_knot->knot=nobj->curve.color.knot;
- nknots=color_knot->nknots=nobj->curve.color.knot_count;
- order=color_knot->order=nobj->curve.color.order;
- color_knot->delta_nknots=0;
- t_min=color_knot->t_min=order-1;
- t_max=color_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- color_knot->open_at_begin=GL_TRUE;
- }
- else
- color_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_knot->open_at_end=GL_TRUE;
- }
- else
- color_knot->open_at_end=GL_FALSE;
- }
- else
- color_knot->unified_knot=NULL;
- if(nobj->curve.normal.type!=GLU_INVALID_ENUM)
- {
- normal_knot->unified_knot=(GLfloat *)1;
- knot=normal_knot->knot=nobj->curve.normal.knot;
- nknots=normal_knot->nknots=nobj->curve.normal.knot_count;
- order=normal_knot->order=nobj->curve.normal.order;
- normal_knot->delta_nknots=0;
- t_min=normal_knot->t_min=order-1;
- t_max=normal_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- normal_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_knot->open_at_end=GL_TRUE;
- }
- else
- normal_knot->open_at_end=GL_FALSE;
- }
- else
- normal_knot->unified_knot=NULL;
- if(nobj->curve.texture.type!=GLU_INVALID_ENUM)
- {
- texture_knot->unified_knot=(GLfloat *)1;
- knot=texture_knot->knot=nobj->curve.texture.knot;
- nknots=texture_knot->nknots=nobj->curve.texture.knot_count;
- order=texture_knot->order=nobj->curve.texture.order;
- texture_knot->delta_nknots=0;
- t_min=texture_knot->t_min=order-1;
- t_max=texture_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- texture_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_knot->open_at_end=GL_TRUE;
- }
- else
- texture_knot->open_at_end=GL_FALSE;
- }
- else
- texture_knot->unified_knot=NULL;
- return GLU_NO_ERROR;
+ geom_knot->unified_knot = NULL;
+ knot = geom_knot->knot = nobj->curve.geom.knot;
+ nknots = geom_knot->nknots = nobj->curve.geom.knot_count;
+ order = geom_knot->order = nobj->curve.geom.order;
+ geom_knot->delta_nknots = 0;
+ t_min = geom_knot->t_min = order - 1;
+ t_max = geom_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ geom_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_knot->open_at_end = GL_FALSE;
+ if (nobj->curve.color.type != GLU_INVALID_ENUM) {
+ color_knot->unified_knot = (GLfloat *) 1;
+ knot = color_knot->knot = nobj->curve.color.knot;
+ nknots = color_knot->nknots = nobj->curve.color.knot_count;
+ order = color_knot->order = nobj->curve.color.order;
+ color_knot->delta_nknots = 0;
+ t_min = color_knot->t_min = order - 1;
+ t_max = color_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ color_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_knot->open_at_end = GL_FALSE;
+ }
+ else
+ color_knot->unified_knot = NULL;
+ if (nobj->curve.normal.type != GLU_INVALID_ENUM) {
+ normal_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_knot->knot = nobj->curve.normal.knot;
+ nknots = normal_knot->nknots = nobj->curve.normal.knot_count;
+ order = normal_knot->order = nobj->curve.normal.order;
+ normal_knot->delta_nknots = 0;
+ t_min = normal_knot->t_min = order - 1;
+ t_max = normal_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ normal_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_knot->open_at_end = GL_FALSE;
+ }
+ else
+ normal_knot->unified_knot = NULL;
+ if (nobj->curve.texture.type != GLU_INVALID_ENUM) {
+ texture_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_knot->knot = nobj->curve.texture.knot;
+ nknots = texture_knot->nknots = nobj->curve.texture.knot_count;
+ order = texture_knot->order = nobj->curve.texture.order;
+ texture_knot->delta_nknots = 0;
+ t_min = texture_knot->t_min = order - 1;
+ t_max = texture_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ texture_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_knot->open_at_end = GL_FALSE;
+ }
+ else
+ texture_knot->unified_knot = NULL;
+ return GLU_NO_ERROR;
}
/* covert the NURBS curve into a series of adjacent Bezier curves */
static GLenum
-convert_curve(knot_str_type *the_knot, curve_attribs *attrib,
- GLfloat **new_ctrl,GLint *ncontrol)
+convert_curve(knot_str_type * the_knot, curve_attribs * attrib,
+ GLfloat ** new_ctrl, GLint * ncontrol)
{
- GLenum err;
+ GLenum err;
- if((err=explode_knot(the_knot))!=GLU_NO_ERROR)
- {
- if(the_knot->unified_knot)
- {
- free(the_knot->unified_knot);
- the_knot->unified_knot=NULL;
- }
- return err;
- }
- if(the_knot->unified_knot)
- {
- free(the_knot->unified_knot);
- the_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(the_knot))!=GLU_NO_ERROR)
- {
- free(the_knot->new_knot);
- return err;
- }
- free(the_knot->new_knot);
- if((err=calc_new_ctrl_pts(attrib->ctrlarray,attrib->stride,the_knot,
- attrib->dim,new_ctrl,ncontrol))
- !=GLU_NO_ERROR)
- {
- free(the_knot->alpha);
- return err;
- }
- free(the_knot->alpha);
- return GLU_NO_ERROR;
+ if ((err = explode_knot(the_knot)) != GLU_NO_ERROR) {
+ if (the_knot->unified_knot) {
+ free(the_knot->unified_knot);
+ the_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (the_knot->unified_knot) {
+ free(the_knot->unified_knot);
+ the_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(the_knot)) != GLU_NO_ERROR) {
+ free(the_knot->new_knot);
+ return err;
+ }
+ free(the_knot->new_knot);
+ if ((err = calc_new_ctrl_pts(attrib->ctrlarray, attrib->stride, the_knot,
+ attrib->dim, new_ctrl, ncontrol))
+ != GLU_NO_ERROR) {
+ free(the_knot->alpha);
+ return err;
+ }
+ free(the_knot->alpha);
+ return GLU_NO_ERROR;
}
/* covert curves - geometry and possible attribute ones into equivalent */
/* sequence of adjacent Bezier curves */
static GLenum
-convert_curves(GLUnurbsObj *nobj, GLfloat **new_geom_ctrl,
- GLint *ncontrol, GLfloat **new_color_ctrl, GLfloat **new_normal_ctrl,
- GLfloat **new_texture_ctrl)
+convert_curves(GLUnurbsObj * nobj, GLfloat ** new_geom_ctrl,
+ GLint * ncontrol, GLfloat ** new_color_ctrl,
+ GLfloat ** new_normal_ctrl, GLfloat ** new_texture_ctrl)
{
- knot_str_type geom_knot,color_knot,normal_knot,texture_knot;
- GLint junk;
- GLenum err;
+ knot_str_type geom_knot, color_knot, normal_knot, texture_knot;
+ GLint junk;
+ GLenum err;
- *new_color_ctrl=*new_normal_ctrl=*new_texture_ctrl=NULL;
+ *new_color_ctrl = *new_normal_ctrl = *new_texture_ctrl = NULL;
- if(fill_knot_structures(nobj,&geom_knot,&color_knot,&normal_knot,
- &texture_knot)!=GLU_NO_ERROR)
- return GLU_ERROR;
+ if (fill_knot_structures(nobj, &geom_knot, &color_knot, &normal_knot,
+ &texture_knot) != GLU_NO_ERROR)
+ return GLU_ERROR;
- /* unify knots - all knots should have the same number of working */
- /* ranges */
- if((err=select_knot_working_range(nobj,&geom_knot,&color_knot,&normal_knot,
- &texture_knot))!=GLU_NO_ERROR)
- {
- return err;
- }
- /* convert the geometry curve */
- nobj->curve.geom.dim=get_curve_dim(nobj->curve.geom.type);
- if((err=convert_curve(&geom_knot,&(nobj->curve.geom),new_geom_ctrl,
- ncontrol))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- call_user_error(nobj,err);
- return err;
- }
- /* if additional attributive curves are given convert them as well */
- if(color_knot.unified_knot)
- {
- nobj->curve.color.dim=get_curve_dim(nobj->curve.color.type);
- if((err=convert_curve(&color_knot,&(nobj->curve.color),
- new_color_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(normal_knot.unified_knot)
- {
- nobj->curve.normal.dim=get_curve_dim(nobj->curve.normal.type);
- if((err=convert_curve(&normal_knot,&(nobj->curve.normal),
- new_normal_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- if(*new_color_ctrl)
- free(*new_color_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(texture_knot.unified_knot)
- {
- nobj->curve.texture.dim=get_curve_dim(nobj->curve.texture.type);
- if((err=convert_curve(&texture_knot,&(nobj->curve.texture),
- new_texture_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- if(*new_color_ctrl)
- free(*new_color_ctrl);
- if(*new_normal_ctrl)
- free(*new_normal_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- return GLU_NO_ERROR;
+ /* unify knots - all knots should have the same number of working */
+ /* ranges */
+ if (
+ (err =
+ select_knot_working_range(nobj, &geom_knot, &color_knot, &normal_knot,
+ &texture_knot)) != GLU_NO_ERROR) {
+ return err;
+ }
+ /* convert the geometry curve */
+ nobj->curve.geom.dim = get_curve_dim(nobj->curve.geom.type);
+ if ((err = convert_curve(&geom_knot, &(nobj->curve.geom), new_geom_ctrl,
+ ncontrol)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
+ /* if additional attributive curves are given convert them as well */
+ if (color_knot.unified_knot) {
+ nobj->curve.color.dim = get_curve_dim(nobj->curve.color.type);
+ if ((err = convert_curve(&color_knot, &(nobj->curve.color),
+ new_color_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (normal_knot.unified_knot) {
+ nobj->curve.normal.dim = get_curve_dim(nobj->curve.normal.type);
+ if ((err = convert_curve(&normal_knot, &(nobj->curve.normal),
+ new_normal_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ if (*new_color_ctrl)
+ free(*new_color_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (texture_knot.unified_knot) {
+ nobj->curve.texture.dim = get_curve_dim(nobj->curve.texture.type);
+ if ((err = convert_curve(&texture_knot, &(nobj->curve.texture),
+ new_texture_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ if (*new_color_ctrl)
+ free(*new_color_ctrl);
+ if (*new_normal_ctrl)
+ free(*new_normal_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ return GLU_NO_ERROR;
}
/* main NURBS curve procedure */
-void do_nurbs_curve( GLUnurbsObj *nobj)
+void
+do_nurbs_curve(GLUnurbsObj * nobj)
{
- GLint geom_order,color_order=0,normal_order=0,texture_order=0;
- GLenum geom_type;
- GLint n_ctrl;
- GLfloat *new_geom_ctrl,*new_color_ctrl,*new_normal_ctrl,*new_texture_ctrl;
- GLfloat *geom_ctrl,*color_ctrl,*normal_ctrl,*texture_ctrl;
- GLint *factors;
- GLint i,j;
- GLint geom_dim,color_dim=0,normal_dim=0,texture_dim=0;
+ GLint geom_order, color_order = 0, normal_order = 0, texture_order = 0;
+ GLenum geom_type;
+ GLint n_ctrl;
+ GLfloat *new_geom_ctrl, *new_color_ctrl, *new_normal_ctrl,
+ *new_texture_ctrl;
+ GLfloat *geom_ctrl, *color_ctrl, *normal_ctrl, *texture_ctrl;
+ GLint *factors;
+ GLint i, j;
+ GLint geom_dim, color_dim = 0, normal_dim = 0, texture_dim = 0;
- /* test the user supplied data */
- if(test_nurbs_curves(nobj)!=GLU_NO_ERROR)
- return;
+ /* test the user supplied data */
+ if (test_nurbs_curves(nobj) != GLU_NO_ERROR)
+ return;
- if(convert_curves(nobj,&new_geom_ctrl,&n_ctrl,&new_color_ctrl,
- &new_normal_ctrl,&new_texture_ctrl)!=GLU_NO_ERROR)
- return;
+ if (convert_curves(nobj, &new_geom_ctrl, &n_ctrl, &new_color_ctrl,
+ &new_normal_ctrl, &new_texture_ctrl) != GLU_NO_ERROR)
+ return;
- geom_order=nobj->curve.geom.order;
- geom_type=nobj->curve.geom.type;
- geom_dim=nobj->curve.geom.dim;
+ geom_order = nobj->curve.geom.order;
+ geom_type = nobj->curve.geom.type;
+ geom_dim = nobj->curve.geom.dim;
- if(glu_do_sampling_crv(nobj,new_geom_ctrl,n_ctrl,geom_order,geom_dim,
- &factors)
- !=GLU_NO_ERROR)
- {
- free(new_geom_ctrl);
- if(new_color_ctrl)
- free(new_color_ctrl);
- if(new_normal_ctrl)
- free(new_normal_ctrl);
- if(new_texture_ctrl)
- free(new_texture_ctrl);
- return;
- }
- glEnable(geom_type);
- if(new_color_ctrl)
- {
- glEnable(nobj->curve.color.type);
- color_dim=nobj->curve.color.dim;
- color_ctrl=new_color_ctrl;
- color_order=nobj->curve.color.order;
- }
- if(new_normal_ctrl)
- {
- glEnable(nobj->curve.normal.type);
- normal_dim=nobj->curve.normal.dim;
- normal_ctrl=new_normal_ctrl;
- normal_order=nobj->curve.normal.order;
- }
- if(new_texture_ctrl)
- {
- glEnable(nobj->curve.texture.type);
- texture_dim=nobj->curve.texture.dim;
- texture_ctrl=new_texture_ctrl;
- texture_order=nobj->curve.texture.order;
- }
- for(i=0 , j=0, geom_ctrl=new_geom_ctrl;
- i<n_ctrl;
- i+=geom_order , j++ , geom_ctrl+=geom_order*geom_dim)
- {
- if(fine_culling_test_2D(nobj,geom_ctrl,geom_order,geom_dim,geom_dim))
- {
- color_ctrl+=color_order*color_dim;
- normal_ctrl+=normal_order*normal_dim;
- texture_ctrl+=texture_order*texture_dim;
- continue;
- }
- glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
- if(new_color_ctrl)
- {
- glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
- color_order,color_ctrl);
- color_ctrl+=color_order*color_dim;
- }
- if(new_normal_ctrl)
- {
- glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
- normal_order,normal_ctrl);
- normal_ctrl+=normal_order*normal_dim;
- }
- if(new_texture_ctrl)
- {
- glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
- texture_order,texture_ctrl);
- texture_ctrl+=texture_order*texture_dim;
- }
- glMapGrid1f(factors[j],0.0,1.0);
- glEvalMesh1(GL_LINE,0,factors[j]);
- }
- free(new_geom_ctrl);
- free(factors);
- if(new_color_ctrl)
- free(new_color_ctrl);
- if(new_normal_ctrl)
- free(new_normal_ctrl);
- if(new_texture_ctrl)
- free(new_texture_ctrl);
+ if (glu_do_sampling_crv(nobj, new_geom_ctrl, n_ctrl, geom_order, geom_dim,
+ &factors) != GLU_NO_ERROR) {
+ free(new_geom_ctrl);
+ if (new_color_ctrl)
+ free(new_color_ctrl);
+ if (new_normal_ctrl)
+ free(new_normal_ctrl);
+ if (new_texture_ctrl)
+ free(new_texture_ctrl);
+ return;
+ }
+ glEnable(geom_type);
+ if (new_color_ctrl) {
+ glEnable(nobj->curve.color.type);
+ color_dim = nobj->curve.color.dim;
+ color_ctrl = new_color_ctrl;
+ color_order = nobj->curve.color.order;
+ }
+ if (new_normal_ctrl) {
+ glEnable(nobj->curve.normal.type);
+ normal_dim = nobj->curve.normal.dim;
+ normal_ctrl = new_normal_ctrl;
+ normal_order = nobj->curve.normal.order;
+ }
+ if (new_texture_ctrl) {
+ glEnable(nobj->curve.texture.type);
+ texture_dim = nobj->curve.texture.dim;
+ texture_ctrl = new_texture_ctrl;
+ texture_order = nobj->curve.texture.order;
+ }
+ for (i = 0, j = 0, geom_ctrl = new_geom_ctrl;
+ i < n_ctrl; i += geom_order, j++, geom_ctrl += geom_order * geom_dim) {
+ if (fine_culling_test_2D
+ (nobj, geom_ctrl, geom_order, geom_dim, geom_dim)) {
+ color_ctrl += color_order * color_dim;
+ normal_ctrl += normal_order * normal_dim;
+ texture_ctrl += texture_order * texture_dim;
+ continue;
+ }
+ glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
+ if (new_color_ctrl) {
+ glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
+ color_order, color_ctrl);
+ color_ctrl += color_order * color_dim;
+ }
+ if (new_normal_ctrl) {
+ glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
+ normal_order, normal_ctrl);
+ normal_ctrl += normal_order * normal_dim;
+ }
+ if (new_texture_ctrl) {
+ glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
+ texture_order, texture_ctrl);
+ texture_ctrl += texture_order * texture_dim;
+ }
+ glMapGrid1f(factors[j], 0.0, 1.0);
+ glEvalMesh1(GL_LINE, 0, factors[j]);
+ }
+ free(new_geom_ctrl);
+ free(factors);
+ if (new_color_ctrl)
+ free(new_color_ctrl);
+ if (new_normal_ctrl)
+ free(new_normal_ctrl);
+ if (new_texture_ctrl)
+ free(new_texture_ctrl);
}
-
-
-/* $Id: nurbssrf.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
+/* $Id: nurbssrf.c,v 1.2 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 2.4
- * Copyright (C) 1995-1997 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: nurbssrf.c,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.7 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.6 1997/06/23 00:22:07 brianp
- * include <string.h>
- *
- * Revision 1.5 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.4 1997/05/27 03:20:35 brianp
- * minor clean-up
- *
- * Revision 1.3 1997/05/27 03:00:16 brianp
- * incorporated Bogdan's new NURBS code
- *
- * Revision 1.2 1996/09/27 23:13:02 brianp
- * added return 0 to get_surface_dim() to silence warning
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
-/*
* NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
* See README2 for more info.
*/
static int
get_surface_dim(GLenum type)
{
- switch(type)
- {
- case GL_MAP2_VERTEX_3: return 3;
- case GL_MAP2_VERTEX_4: return 4;
- case GL_MAP2_INDEX: return 1;
- case GL_MAP2_COLOR_4: return 4;
- case GL_MAP2_NORMAL: return 3;
- case GL_MAP2_TEXTURE_COORD_1: return 1;
- case GL_MAP2_TEXTURE_COORD_2: return 2;
- case GL_MAP2_TEXTURE_COORD_3: return 3;
- case GL_MAP2_TEXTURE_COORD_4: return 4;
- default: abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here*/
+ switch (type) {
+ case GL_MAP2_VERTEX_3:
+ return 3;
+ case GL_MAP2_VERTEX_4:
+ return 4;
+ case GL_MAP2_INDEX:
+ return 1;
+ case GL_MAP2_COLOR_4:
+ return 4;
+ case GL_MAP2_NORMAL:
+ return 3;
+ case GL_MAP2_TEXTURE_COORD_1:
+ return 1;
+ case GL_MAP2_TEXTURE_COORD_2:
+ return 2;
+ case GL_MAP2_TEXTURE_COORD_3:
+ return 3;
+ case GL_MAP2_TEXTURE_COORD_4:
+ return 4;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ return 0; /*never get here */
}
static GLenum
-test_nurbs_surface(GLUnurbsObj *nobj, surface_attribs *attrib)
+test_nurbs_surface(GLUnurbsObj * nobj, surface_attribs * attrib)
{
- GLenum err;
- GLint tmp_int;
+ GLenum err;
+ GLint tmp_int;
- if(attrib->sorder < 0 || attrib->torder < 0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER,&tmp_int);
- if(attrib->sorder > tmp_int || attrib->sorder < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attrib->torder > tmp_int || attrib->torder < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attrib->sknot_count < attrib->sorder +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attrib->tknot_count < attrib->torder +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attrib->s_stride < 0 || attrib->t_stride < 0)
- {
- call_user_error(nobj,GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if(attrib->sknot==NULL || attrib->tknot==NULL || attrib->ctrlarray==NULL)
- {
- call_user_error(nobj,GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if((err=test_knot(attrib->tknot_count,attrib->tknot,attrib->torder))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- if((err=test_knot(attrib->sknot_count,attrib->sknot,attrib->sorder))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
+ if (attrib->sorder < 0 || attrib->torder < 0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return GLU_ERROR;
+ }
+ glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
+ if (attrib->sorder > tmp_int || attrib->sorder < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attrib->torder > tmp_int || attrib->torder < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attrib->sknot_count < attrib->sorder + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attrib->tknot_count < attrib->torder + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attrib->s_stride < 0 || attrib->t_stride < 0) {
+ call_user_error(nobj, GLU_NURBS_ERROR34);
+ return GLU_ERROR;
+ }
+ if (attrib->sknot == NULL || attrib->tknot == NULL
+ || attrib->ctrlarray == NULL) {
+ call_user_error(nobj, GLU_NURBS_ERROR36);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attrib->tknot_count, attrib->tknot, attrib->torder))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attrib->sknot_count, attrib->sknot, attrib->sorder))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ return GLU_NO_ERROR;
}
static GLenum
-test_nurbs_surfaces(GLUnurbsObj *nobj)
+test_nurbs_surfaces(GLUnurbsObj * nobj)
{
- /* test the geometric data */
- if(test_nurbs_surface(nobj,&(nobj->surface.geom))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if(nobj->surface.color.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.color))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if(nobj->surface.normal.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.normal))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if(nobj->surface.texture.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.texture))!=GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
+ /* test the geometric data */
+ if (test_nurbs_surface(nobj, &(nobj->surface.geom)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* now test the attributive data */
+ /* color */
+ if (nobj->surface.color.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.color)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* normal */
+ if (nobj->surface.normal.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.normal)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* texture */
+ if (nobj->surface.texture.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.texture)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ return GLU_NO_ERROR;
}
static GLenum
-convert_surf(knot_str_type *s_knot, knot_str_type *t_knot,
- surface_attribs *attrib, GLfloat **new_ctrl,
- GLint *s_n_ctrl, GLint *t_n_ctrl)
+convert_surf(knot_str_type * s_knot, knot_str_type * t_knot,
+ surface_attribs * attrib, GLfloat ** new_ctrl,
+ GLint * s_n_ctrl, GLint * t_n_ctrl)
{
- GLfloat **tmp_ctrl;
- GLfloat *ctrl_offset;
- GLint tmp_n_control;
- GLint i,j,t_cnt,s_cnt;
- GLint tmp_stride;
- GLint dim;
- GLenum err;
+ GLfloat **tmp_ctrl;
+ GLfloat *ctrl_offset;
+ GLint tmp_n_control;
+ GLint i, j, t_cnt, s_cnt;
+ GLint tmp_stride;
+ GLint dim;
+ GLenum err;
- /* valid range is empty? */
- if((s_knot->unified_knot !=NULL && s_knot->unified_nknots==0) ||
- (t_knot->unified_knot !=NULL && t_knot->unified_nknots==0))
- {
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- *s_n_ctrl=0;
- *t_n_ctrl=0;
- return GLU_NO_ERROR;
- }
- t_cnt=attrib->tknot_count-attrib->torder;
- s_cnt=attrib->sknot_count-attrib->sorder;
- if((tmp_ctrl=(GLfloat **)malloc(sizeof(GLfloat *)*t_cnt))==NULL)
- return GLU_OUT_OF_MEMORY;
- if((err=explode_knot(s_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- return err;
- }
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(s_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- free(s_knot->new_knot);
- return err;
- }
- free(s_knot->new_knot);
- ctrl_offset=attrib->ctrlarray;
- dim=attrib->dim;
- for(i=0;i<t_cnt;i++)
- {
- if((err=calc_new_ctrl_pts(ctrl_offset,attrib->s_stride,s_knot,
- dim,&(tmp_ctrl[i]),&tmp_n_control))!=GLU_NO_ERROR)
- {
- for(--i;i<=0;i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(s_knot->alpha);
- return err;
- }
- ctrl_offset+=attrib->t_stride;
- }
- free(s_knot->alpha);
- tmp_stride=dim*tmp_n_control;
- if((*new_ctrl=(GLfloat *)malloc(sizeof(GLfloat)*tmp_stride*t_cnt))
- ==NULL)
- {
- for(i=0;i<t_cnt;i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for(i=0;i<tmp_n_control;i++)
- for(j=0;j<t_cnt;j++)
- MEMCPY(*new_ctrl+j*dim+i*dim*t_cnt,tmp_ctrl[j]+dim*i,
- sizeof(GLfloat)*dim);
- for(i=0;i<t_cnt;i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- *s_n_ctrl=tmp_n_control;
-
- if((tmp_ctrl=(GLfloat **)malloc(sizeof(GLfloat *)*(*s_n_ctrl)))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((err=explode_knot(t_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- return err;
- }
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(t_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- free(t_knot->new_knot);
- return err;
- }
- free(t_knot->new_knot);
- ctrl_offset=*new_ctrl;
- for(i=0;i<(*s_n_ctrl);i++)
- {
- if((err=calc_new_ctrl_pts(ctrl_offset,dim,t_knot,
- dim,&(tmp_ctrl[i]),&tmp_n_control))!=GLU_NO_ERROR)
- {
- for(--i;i<=0;i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(t_knot->alpha);
- return err;
- }
- ctrl_offset+=dim*t_cnt;
- }
- free(t_knot->alpha);
- free(*new_ctrl);
- tmp_stride=dim*tmp_n_control;
- if((*new_ctrl=(GLfloat *)malloc(sizeof(GLfloat)*tmp_stride*(*s_n_ctrl)))
- ==NULL)
- {
- for(i=0;i<(*s_n_ctrl);i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for(i=0;i<(*s_n_ctrl);i++)
- {
- MEMCPY(*new_ctrl+i*tmp_stride,tmp_ctrl[i],sizeof(GLfloat)*tmp_stride);
- free(tmp_ctrl[i]);
- }
- free(tmp_ctrl);
- *t_n_ctrl=tmp_n_control;
- return GLU_NO_ERROR;
+ /* valid range is empty? */
+ if ((s_knot->unified_knot != NULL && s_knot->unified_nknots == 0) ||
+ (t_knot->unified_knot != NULL && t_knot->unified_nknots == 0)) {
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ *s_n_ctrl = 0;
+ *t_n_ctrl = 0;
+ return GLU_NO_ERROR;
+ }
+ t_cnt = attrib->tknot_count - attrib->torder;
+ s_cnt = attrib->sknot_count - attrib->sorder;
+ if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * t_cnt)) == NULL)
+ return GLU_OUT_OF_MEMORY;
+ if ((err = explode_knot(s_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(s_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ free(s_knot->new_knot);
+ return err;
+ }
+ free(s_knot->new_knot);
+ ctrl_offset = attrib->ctrlarray;
+ dim = attrib->dim;
+ for (i = 0; i < t_cnt; i++) {
+ if ((err = calc_new_ctrl_pts(ctrl_offset, attrib->s_stride, s_knot,
+ dim, &(tmp_ctrl[i]),
+ &tmp_n_control)) != GLU_NO_ERROR) {
+ for (--i; i <= 0; i--)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ free(s_knot->alpha);
+ return err;
+ }
+ ctrl_offset += attrib->t_stride;
+ }
+ free(s_knot->alpha);
+ tmp_stride = dim * tmp_n_control;
+ if ((*new_ctrl = (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * t_cnt))
+ == NULL) {
+ for (i = 0; i < t_cnt; i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (i = 0; i < tmp_n_control; i++)
+ for (j = 0; j < t_cnt; j++)
+ MEMCPY(*new_ctrl + j * dim + i * dim * t_cnt, tmp_ctrl[j] + dim * i,
+ sizeof(GLfloat) * dim);
+ for (i = 0; i < t_cnt; i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ *s_n_ctrl = tmp_n_control;
+
+ if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * (*s_n_ctrl))) ==
+ NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((err = explode_knot(t_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(t_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ free(t_knot->new_knot);
+ return err;
+ }
+ free(t_knot->new_knot);
+ ctrl_offset = *new_ctrl;
+ for (i = 0; i < (*s_n_ctrl); i++) {
+ if ((err = calc_new_ctrl_pts(ctrl_offset, dim, t_knot,
+ dim, &(tmp_ctrl[i]),
+ &tmp_n_control)) != GLU_NO_ERROR) {
+ for (--i; i <= 0; i--)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ free(t_knot->alpha);
+ return err;
+ }
+ ctrl_offset += dim * t_cnt;
+ }
+ free(t_knot->alpha);
+ free(*new_ctrl);
+ tmp_stride = dim * tmp_n_control;
+ if (
+ (*new_ctrl =
+ (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * (*s_n_ctrl))) ==
+ NULL) {
+ for (i = 0; i < (*s_n_ctrl); i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (i = 0; i < (*s_n_ctrl); i++) {
+ MEMCPY(*new_ctrl + i * tmp_stride, tmp_ctrl[i],
+ sizeof(GLfloat) * tmp_stride);
+ free(tmp_ctrl[i]);
+ }
+ free(tmp_ctrl);
+ *t_n_ctrl = tmp_n_control;
+ return GLU_NO_ERROR;
}
/* prepare the knot information structures */
static GLenum
-fill_knot_structures(GLUnurbsObj *nobj,
- knot_str_type *geom_s_knot, knot_str_type *geom_t_knot,
- knot_str_type *color_s_knot, knot_str_type *color_t_knot,
- knot_str_type *normal_s_knot, knot_str_type *normal_t_knot,
- knot_str_type *texture_s_knot, knot_str_type *texture_t_knot)
+fill_knot_structures(GLUnurbsObj * nobj,
+ knot_str_type * geom_s_knot, knot_str_type * geom_t_knot,
+ knot_str_type * color_s_knot,
+ knot_str_type * color_t_knot,
+ knot_str_type * normal_s_knot,
+ knot_str_type * normal_t_knot,
+ knot_str_type * texture_s_knot,
+ knot_str_type * texture_t_knot)
{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min,t_max;
+ GLint order;
+ GLfloat *knot;
+ GLint nknots;
+ GLint t_min, t_max;
- geom_s_knot->unified_knot=NULL;
- knot=geom_s_knot->knot=nobj->surface.geom.sknot;
- nknots=geom_s_knot->nknots=nobj->surface.geom.sknot_count;
- order=geom_s_knot->order=nobj->surface.geom.sorder;
- geom_s_knot->delta_nknots=0;
- t_min=geom_s_knot->t_min=order-1;
- t_max=geom_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- geom_s_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_s_knot->open_at_end=GL_TRUE;
- }
- else
- geom_s_knot->open_at_end=GL_FALSE;
- geom_t_knot->unified_knot=NULL;
- knot=geom_t_knot->knot=nobj->surface.geom.tknot;
- nknots=geom_t_knot->nknots=nobj->surface.geom.tknot_count;
- order=geom_t_knot->order=nobj->surface.geom.torder;
- geom_t_knot->delta_nknots=0;
- t_min=geom_t_knot->t_min=order-1;
- t_max=geom_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- geom_t_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_t_knot->open_at_end=GL_TRUE;
- }
- else
- geom_t_knot->open_at_end=GL_FALSE;
+ geom_s_knot->unified_knot = NULL;
+ knot = geom_s_knot->knot = nobj->surface.geom.sknot;
+ nknots = geom_s_knot->nknots = nobj->surface.geom.sknot_count;
+ order = geom_s_knot->order = nobj->surface.geom.sorder;
+ geom_s_knot->delta_nknots = 0;
+ t_min = geom_s_knot->t_min = order - 1;
+ t_max = geom_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ geom_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_s_knot->open_at_end = GL_FALSE;
+ geom_t_knot->unified_knot = NULL;
+ knot = geom_t_knot->knot = nobj->surface.geom.tknot;
+ nknots = geom_t_knot->nknots = nobj->surface.geom.tknot_count;
+ order = geom_t_knot->order = nobj->surface.geom.torder;
+ geom_t_knot->delta_nknots = 0;
+ t_min = geom_t_knot->t_min = order - 1;
+ t_max = geom_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ geom_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_t_knot->open_at_end = GL_FALSE;
- if(nobj->surface.color.type!=GLU_INVALID_ENUM)
- {
- color_s_knot->unified_knot=(GLfloat *)1;
- knot=color_s_knot->knot=nobj->surface.color.sknot;
- nknots=color_s_knot->nknots=nobj->surface.color.sknot_count;
- order=color_s_knot->order=nobj->surface.color.sorder;
- color_s_knot->delta_nknots=0;
- t_min=color_s_knot->t_min=order-1;
- t_max=color_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- color_s_knot->open_at_begin=GL_TRUE;
- }
- else
- color_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_s_knot->open_at_end=GL_TRUE;
- }
- else
- color_s_knot->open_at_end=GL_FALSE;
- color_t_knot->unified_knot=(GLfloat *)1;
- knot=color_t_knot->knot=nobj->surface.color.tknot;
- nknots=color_t_knot->nknots=nobj->surface.color.tknot_count;
- order=color_t_knot->order=nobj->surface.color.torder;
- color_t_knot->delta_nknots=0;
- t_min=color_t_knot->t_min=order-1;
- t_max=color_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- color_t_knot->open_at_begin=GL_TRUE;
- }
- else
- color_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_t_knot->open_at_end=GL_TRUE;
- }
- else
- color_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- color_s_knot->unified_knot=NULL;
- color_t_knot->unified_knot=NULL;
- }
+ if (nobj->surface.color.type != GLU_INVALID_ENUM) {
+ color_s_knot->unified_knot = (GLfloat *) 1;
+ knot = color_s_knot->knot = nobj->surface.color.sknot;
+ nknots = color_s_knot->nknots = nobj->surface.color.sknot_count;
+ order = color_s_knot->order = nobj->surface.color.sorder;
+ color_s_knot->delta_nknots = 0;
+ t_min = color_s_knot->t_min = order - 1;
+ t_max = color_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ color_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_s_knot->open_at_end = GL_FALSE;
+ color_t_knot->unified_knot = (GLfloat *) 1;
+ knot = color_t_knot->knot = nobj->surface.color.tknot;
+ nknots = color_t_knot->nknots = nobj->surface.color.tknot_count;
+ order = color_t_knot->order = nobj->surface.color.torder;
+ color_t_knot->delta_nknots = 0;
+ t_min = color_t_knot->t_min = order - 1;
+ t_max = color_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ color_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ color_s_knot->unified_knot = NULL;
+ color_t_knot->unified_knot = NULL;
+ }
- if(nobj->surface.normal.type!=GLU_INVALID_ENUM)
- {
- normal_s_knot->unified_knot=(GLfloat *)1;
- knot=normal_s_knot->knot=nobj->surface.normal.sknot;
- nknots=normal_s_knot->nknots=nobj->surface.normal.sknot_count;
- order=normal_s_knot->order=nobj->surface.normal.sorder;
- normal_s_knot->delta_nknots=0;
- t_min=normal_s_knot->t_min=order-1;
- t_max=normal_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- normal_s_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_s_knot->open_at_end=GL_TRUE;
- }
- else
- normal_s_knot->open_at_end=GL_FALSE;
- normal_t_knot->unified_knot=(GLfloat *)1;
- knot=normal_t_knot->knot=nobj->surface.normal.tknot;
- nknots=normal_t_knot->nknots=nobj->surface.normal.tknot_count;
- order=normal_t_knot->order=nobj->surface.normal.torder;
- normal_t_knot->delta_nknots=0;
- t_min=normal_t_knot->t_min=order-1;
- t_max=normal_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- normal_t_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_t_knot->open_at_end=GL_TRUE;
- }
- else
- normal_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- normal_s_knot->unified_knot=NULL;
- normal_t_knot->unified_knot=NULL;
- }
+ if (nobj->surface.normal.type != GLU_INVALID_ENUM) {
+ normal_s_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_s_knot->knot = nobj->surface.normal.sknot;
+ nknots = normal_s_knot->nknots = nobj->surface.normal.sknot_count;
+ order = normal_s_knot->order = nobj->surface.normal.sorder;
+ normal_s_knot->delta_nknots = 0;
+ t_min = normal_s_knot->t_min = order - 1;
+ t_max = normal_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ normal_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_s_knot->open_at_end = GL_FALSE;
+ normal_t_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_t_knot->knot = nobj->surface.normal.tknot;
+ nknots = normal_t_knot->nknots = nobj->surface.normal.tknot_count;
+ order = normal_t_knot->order = nobj->surface.normal.torder;
+ normal_t_knot->delta_nknots = 0;
+ t_min = normal_t_knot->t_min = order - 1;
+ t_max = normal_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ normal_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ normal_s_knot->unified_knot = NULL;
+ normal_t_knot->unified_knot = NULL;
+ }
- if(nobj->surface.texture.type!=GLU_INVALID_ENUM)
- {
- texture_s_knot->unified_knot=(GLfloat *)1;
- knot=texture_s_knot->knot=nobj->surface.texture.sknot;
- nknots=texture_s_knot->nknots=nobj->surface.texture.sknot_count;
- order=texture_s_knot->order=nobj->surface.texture.sorder;
- texture_s_knot->delta_nknots=0;
- t_min=texture_s_knot->t_min=order-1;
- t_max=texture_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- texture_s_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_s_knot->open_at_end=GL_TRUE;
- }
- else
- texture_s_knot->open_at_end=GL_FALSE;
- texture_t_knot->unified_knot=(GLfloat *)1;
- knot=texture_t_knot->knot=nobj->surface.texture.tknot;
- nknots=texture_t_knot->nknots=nobj->surface.texture.tknot_count;
- order=texture_t_knot->order=nobj->surface.texture.torder;
- texture_t_knot->delta_nknots=0;
- t_min=texture_t_knot->t_min=order-1;
- t_max=texture_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- texture_t_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_t_knot->open_at_end=GL_TRUE;
- }
- else
- texture_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- texture_s_knot->unified_knot=NULL;
- texture_t_knot->unified_knot=NULL;
- }
- return GLU_NO_ERROR;
+ if (nobj->surface.texture.type != GLU_INVALID_ENUM) {
+ texture_s_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_s_knot->knot = nobj->surface.texture.sknot;
+ nknots = texture_s_knot->nknots = nobj->surface.texture.sknot_count;
+ order = texture_s_knot->order = nobj->surface.texture.sorder;
+ texture_s_knot->delta_nknots = 0;
+ t_min = texture_s_knot->t_min = order - 1;
+ t_max = texture_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ texture_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_s_knot->open_at_end = GL_FALSE;
+ texture_t_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_t_knot->knot = nobj->surface.texture.tknot;
+ nknots = texture_t_knot->nknots = nobj->surface.texture.tknot_count;
+ order = texture_t_knot->order = nobj->surface.texture.torder;
+ texture_t_knot->delta_nknots = 0;
+ t_min = texture_t_knot->t_min = order - 1;
+ t_max = texture_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ texture_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ texture_s_knot->unified_knot = NULL;
+ texture_t_knot->unified_knot = NULL;
+ }
+ return GLU_NO_ERROR;
}
-void
-free_new_ctrl(new_ctrl_type *p)
+
+static void
+free_new_ctrl(new_ctrl_type * p)
{
- if(p->geom_ctrl)
- free(p->geom_ctrl);
- if(p->geom_offsets)
- free(p->geom_offsets);
- if(p->color_ctrl)
- {
- free(p->color_ctrl);
- if(p->color_offsets)
- free(p->color_offsets);
- }
- if(p->normal_ctrl)
- {
- free(p->normal_ctrl);
- if(p->normal_offsets)
- free(p->normal_offsets);
- }
- if(p->texture_ctrl)
- {
- free(p->texture_ctrl);
- if(p->texture_offsets)
- free(p->texture_offsets);
- }
+ if (p->geom_ctrl)
+ free(p->geom_ctrl);
+ if (p->geom_offsets)
+ free(p->geom_offsets);
+ if (p->color_ctrl) {
+ free(p->color_ctrl);
+ if (p->color_offsets)
+ free(p->color_offsets);
+ }
+ if (p->normal_ctrl) {
+ free(p->normal_ctrl);
+ if (p->normal_offsets)
+ free(p->normal_offsets);
+ }
+ if (p->texture_ctrl) {
+ free(p->texture_ctrl);
+ if (p->texture_offsets)
+ free(p->texture_offsets);
+ }
}
/* convert surfaces - geometry and possible attribute ones into equivalent */
/* sequence of adjacent Bezier patches */
static GLenum
-convert_surfs(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl)
+convert_surfs(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl)
{
- knot_str_type geom_s_knot,color_s_knot,normal_s_knot,texture_s_knot;
- knot_str_type geom_t_knot,color_t_knot,normal_t_knot,texture_t_knot;
- GLenum err;
+ knot_str_type geom_s_knot, color_s_knot, normal_s_knot, texture_s_knot;
+ knot_str_type geom_t_knot, color_t_knot, normal_t_knot, texture_t_knot;
+ GLenum err;
- if((err=fill_knot_structures(nobj,&geom_s_knot,&geom_t_knot,
- &color_s_knot,&color_t_knot,&normal_s_knot,&normal_t_knot,
- &texture_s_knot,&texture_t_knot)) !=GLU_NO_ERROR)
- {
- return err;
- }
- /* unify knots - all knots should have the same working range */
- if((err=select_knot_working_range(nobj,&geom_s_knot,&color_s_knot,
- &normal_s_knot,&texture_s_knot)) !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return err;
- }
- if((err=select_knot_working_range(nobj,&geom_t_knot,&color_t_knot,
- &normal_t_knot,&texture_t_knot)) !=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- call_user_error(nobj,err);
- return err;
- }
+ if ((err = fill_knot_structures(nobj, &geom_s_knot, &geom_t_knot,
+ &color_s_knot, &color_t_knot,
+ &normal_s_knot, &normal_t_knot,
+ &texture_s_knot,
+ &texture_t_knot)) != GLU_NO_ERROR) {
+ return err;
+ }
+ /* unify knots - all knots should have the same working range */
+ if ((err = select_knot_working_range(nobj, &geom_s_knot, &color_s_knot,
+ &normal_s_knot,
+ &texture_s_knot)) != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return err;
+ }
+ if ((err = select_knot_working_range(nobj, &geom_t_knot, &color_t_knot,
+ &normal_t_knot,
+ &texture_t_knot)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
- /* convert the geometry surface */
- nobj->surface.geom.dim=get_surface_dim(nobj->surface.geom.type);
- if((err=convert_surf(&geom_s_knot,&geom_t_knot,&(nobj->surface.geom),
- &(new_ctrl->geom_ctrl),&(new_ctrl->geom_s_pt_cnt),
- &(new_ctrl->geom_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&geom_t_knot,&color_t_knot,&normal_t_knot,
- &texture_t_knot);
- call_user_error(nobj,err);
- return err;
- }
- /* if additional attributive surfaces are given convert them as well */
- if(color_s_knot.unified_knot)
- {
- nobj->surface.color.dim=get_surface_dim(nobj->surface.color.type);
- if((err=convert_surf(&color_s_knot,&color_t_knot,&(nobj->surface.color),
- &(new_ctrl->color_ctrl),&(new_ctrl->color_s_pt_cnt),
- &(new_ctrl->color_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&color_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&color_t_knot,&color_t_knot,&normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(normal_s_knot.unified_knot)
- {
- nobj->surface.normal.dim=get_surface_dim(nobj->surface.normal.type);
- if((err=convert_surf(&normal_s_knot,&normal_t_knot,
- &(nobj->surface.normal),
- &(new_ctrl->normal_ctrl),&(new_ctrl->normal_s_pt_cnt),
- &(new_ctrl->normal_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&normal_s_knot,&normal_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&normal_t_knot,&normal_t_knot,&normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(texture_s_knot.unified_knot)
- {
- nobj->surface.texture.dim=get_surface_dim(nobj->surface.texture.type);
- if((err=convert_surf(&texture_s_knot,&texture_t_knot,
- &(nobj->surface.texture),
- &(new_ctrl->texture_ctrl),&(new_ctrl->texture_s_pt_cnt),
- &(new_ctrl->texture_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&texture_s_knot,&texture_s_knot,&texture_s_knot,
- &texture_s_knot);
- free_unified_knots(&texture_t_knot,&texture_t_knot,&texture_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- return GLU_NO_ERROR;
+ /* convert the geometry surface */
+ nobj->surface.geom.dim = get_surface_dim(nobj->surface.geom.type);
+ if ((err = convert_surf(&geom_s_knot, &geom_t_knot, &(nobj->surface.geom),
+ &(new_ctrl->geom_ctrl), &(new_ctrl->geom_s_pt_cnt),
+ &(new_ctrl->geom_t_pt_cnt))) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&geom_t_knot, &color_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
+ /* if additional attributive surfaces are given convert them as well */
+ if (color_s_knot.unified_knot) {
+ nobj->surface.color.dim = get_surface_dim(nobj->surface.color.type);
+ if (
+ (err =
+ convert_surf(&color_s_knot, &color_t_knot, &(nobj->surface.color),
+ &(new_ctrl->color_ctrl), &(new_ctrl->color_s_pt_cnt),
+ &(new_ctrl->color_t_pt_cnt))) != GLU_NO_ERROR) {
+ free_unified_knots(&color_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&color_t_knot, &color_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (normal_s_knot.unified_knot) {
+ nobj->surface.normal.dim = get_surface_dim(nobj->surface.normal.type);
+ if ((err = convert_surf(&normal_s_knot, &normal_t_knot,
+ &(nobj->surface.normal),
+ &(new_ctrl->normal_ctrl),
+ &(new_ctrl->normal_s_pt_cnt),
+ &(new_ctrl->normal_t_pt_cnt))) !=
+ GLU_NO_ERROR) {
+ free_unified_knots(&normal_s_knot, &normal_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&normal_t_knot, &normal_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (texture_s_knot.unified_knot) {
+ nobj->surface.texture.dim = get_surface_dim(nobj->surface.texture.type);
+ if ((err = convert_surf(&texture_s_knot, &texture_t_knot,
+ &(nobj->surface.texture),
+ &(new_ctrl->texture_ctrl),
+ &(new_ctrl->texture_s_pt_cnt),
+ &(new_ctrl->texture_t_pt_cnt))) !=
+ GLU_NO_ERROR) {
+ free_unified_knots(&texture_s_knot, &texture_s_knot, &texture_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&texture_t_knot, &texture_t_knot, &texture_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ return GLU_NO_ERROR;
}
/* tesselate the "boundary" Bezier edge strips */
-void
-tesselate_strip_t_line(GLint top_start,GLint top_end,GLint top_z,
- GLint bottom_start,GLint bottom_end,GLint bottom_z,GLint bottom_domain)
+static void
+tesselate_strip_t_line(GLint top_start, GLint top_end, GLint top_z,
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLint bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- glBegin(GL_LINES);
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- {
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalPoint2(top_z,top_start);
- }
- if(bottom_cnt)
- {
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalPoint2(top_z,top_start);
- }
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
- glEnd();
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ glBegin(GL_LINES);
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction) {
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalPoint2(top_z, top_start);
+ }
+ if (bottom_cnt) {
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalPoint2(top_z, top_start);
+ }
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
+ glEnd();
}
-void
-tesselate_strip_t_fill(GLint top_start,GLint top_end,GLint top_z,
- GLint bottom_start,GLint bottom_end,GLint bottom_z,GLint bottom_domain)
+
+static void
+tesselate_strip_t_fill(GLint top_start, GLint top_end, GLint top_z,
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLint bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- glEvalPoint2(top_z,top_start);
- if(bottom_cnt)
- {
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- }
- glEnd();
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction)
+ glEvalPoint2(top_z, top_start);
+ if (bottom_cnt) {
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ }
+ glEnd();
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
}
-void
-tesselate_strip_t(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLint bottom_domain)
+
+static void
+tesselate_strip_t(GLenum display_mode, GLint top_start, GLint top_end,
+ GLint top_z, GLint bottom_start, GLint bottom_end,
+ GLint bottom_z, GLint bottom_domain)
{
- if(display_mode==GL_FILL)
- tesselate_strip_t_fill(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
- else
- tesselate_strip_t_line(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
+ if (display_mode == GL_FILL)
+ tesselate_strip_t_fill(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
+ else
+ tesselate_strip_t_line(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
}
-
-void
+
+static void
tesselate_strip_s_fill(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z, GLfloat bottom_domain)
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLfloat bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- glEvalPoint2(top_start,top_z);
- if(bottom_cnt)
- {
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- }
- glEnd();
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction)
+ glEvalPoint2(top_start, top_z);
+ if (bottom_cnt) {
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ }
+ glEnd();
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
}
-void
+
+static void
tesselate_strip_s_line(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z, GLfloat bottom_domain)
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLfloat bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- glBegin(GL_LINES);
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- {
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- glEvalPoint2(top_start,top_z);
- }
- if(bottom_cnt)
- {
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- glEvalPoint2(top_start,top_z);
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- }
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
- glEnd();
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ glBegin(GL_LINES);
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction) {
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ glEvalPoint2(top_start, top_z);
+ }
+ if (bottom_cnt) {
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ glEvalPoint2(top_start, top_z);
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ }
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
+ glEnd();
}
-void
+
+static void
tesselate_strip_s(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLfloat bottom_domain)
+ GLint top_z, GLint bottom_start, GLint bottom_end,
+ GLint bottom_z, GLfloat bottom_domain)
{
- if(display_mode==GL_FILL)
- tesselate_strip_s_fill(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
- else
- tesselate_strip_s_line(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
+ if (display_mode == GL_FILL)
+ tesselate_strip_s_fill(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
+ else
+ tesselate_strip_s_line(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
}
-void
+static void
tesselate_bottom_left_corner(GLenum display_mode, GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1,1);
- glEvalCoord2f(s_1,0.0);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(0.0,t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(0.0,t_1);
- glEvalCoord2f(0.0,0.0);
- glEvalPoint2(1,1);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(s_1,0.0);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(1, 1);
+ glEvalCoord2f(s_1, 0.0);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(0.0, t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(0.0, t_1);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalPoint2(1, 1);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(s_1, 0.0);
+ }
+ glEnd();
}
-void
-tesselate_bottom_right_corner(GLenum display_mode, GLint v_top,GLint v_bottom,
- GLfloat s_1, GLfloat t_1)
+static void
+tesselate_bottom_right_corner(GLenum display_mode, GLint v_top,
+ GLint v_bottom, GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1,v_top);
- glEvalCoord2f(0.0,v_bottom*t_1);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(s_1,(v_bottom+1)*t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalPoint2(1,v_top);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(0.0,v_bottom*t_1);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(s_1,(v_bottom+1)*t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(1, v_top);
+ glEvalCoord2f(0.0, v_bottom * t_1);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalPoint2(1, v_top);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(0.0, v_bottom * t_1);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
+ }
+ glEnd();
}
-void
+static void
tesselate_top_left_corner(GLenum display_mode, GLint u_right, GLint u_left,
- GLfloat s_1, GLfloat t_1)
+ GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_right,1);
- glEvalCoord2f((u_left+1)*s_1,t_1);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f(u_left*s_1,0.0);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalPoint2(u_right,1);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f(u_left*s_1,0.0);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f((u_left+1)*s_1,t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(u_right, 1);
+ glEvalCoord2f((u_left + 1) * s_1, t_1);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f(u_left * s_1, 0.0);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalPoint2(u_right, 1);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f(u_left * s_1, 0.0);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f((u_left + 1) * s_1, t_1);
+ }
+ glEnd();
}
-void
+static void
tesselate_top_right_corner(GLenum display_mode, GLint u_left, GLint v_bottom,
- GLint u_right, GLint v_top, GLfloat s_1, GLfloat t_1)
+ GLint u_right, GLint v_top, GLfloat s_1,
+ GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_left,v_bottom);
- glEvalCoord2f((u_right-1)*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,(v_top-1)*t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalPoint2(u_left,v_bottom);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,(v_top-1)*t_1);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f((u_right-1)*s_1,v_top*t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(u_left, v_bottom);
+ glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalPoint2(u_left, v_bottom);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
+ }
+ glEnd();
}
/* do mesh mapping of Bezier */
static void
-nurbs_map_bezier(GLenum display_mode,GLint *sfactors,GLint *tfactors,
- GLint s_bezier_cnt, GLint t_bezier_cnt, GLint s, GLint t)
+nurbs_map_bezier(GLenum display_mode, GLint * sfactors, GLint * tfactors,
+ GLint s_bezier_cnt, GLint t_bezier_cnt, GLint s, GLint t)
{
- GLint top,bottom,right,left;
+ GLint top, bottom, right, left;
- if(s==0)
- {
- top=*(tfactors+t*3);
- bottom=*(tfactors+t*3+1);
- }
- else
- if(s==s_bezier_cnt-1)
- {
- top=*(tfactors+t*3+2);
- bottom=*(tfactors+t*3);
- }
- else
- {
- top=bottom=*(tfactors+t*3);
- }
- if(t==0)
- {
- left=*(sfactors+s*3+1);
- right=*(sfactors+s*3);
- }
- else
- if(t==t_bezier_cnt-1)
- {
- left=*(sfactors+s*3);
- right=*(sfactors+s*3+2);
- }
- else
- {
- left=right=*(sfactors+s*3);
- }
+ if (s == 0) {
+ top = *(tfactors + t * 3);
+ bottom = *(tfactors + t * 3 + 1);
+ }
+ else if (s == s_bezier_cnt - 1) {
+ top = *(tfactors + t * 3 + 2);
+ bottom = *(tfactors + t * 3);
+ }
+ else {
+ top = bottom = *(tfactors + t * 3);
+ }
+ if (t == 0) {
+ left = *(sfactors + s * 3 + 1);
+ right = *(sfactors + s * 3);
+ }
+ else if (t == t_bezier_cnt - 1) {
+ left = *(sfactors + s * 3);
+ right = *(sfactors + s * 3 + 2);
+ }
+ else {
+ left = right = *(sfactors + s * 3);
+ }
- if(top>bottom)
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,right, 1, top);
- tesselate_strip_s(display_mode,1,right,1,1,left,0,(GLfloat)left);
- tesselate_bottom_left_corner(display_mode,(GLfloat)(1.0/left),
- (GLfloat)(1.0/bottom));
+ if (top > bottom) {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, right, 1, top);
+ tesselate_strip_s(display_mode, 1, right, 1, 1, left, 0,
+ (GLfloat) left);
+ tesselate_bottom_left_corner(display_mode, (GLfloat) (1.0 / left),
+ (GLfloat) (1.0 / bottom));
/* tesselate_strip_t(display_mode,1,top,1,1,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top,1,1,bottom,1,0,(GLfloat)bottom);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,right, 0, top);
+ tesselate_strip_t(display_mode, top, 1, 1, bottom, 1, 0,
+ (GLfloat) bottom);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, right, 0, top);
/* tesselate_strip_t(display_mode,0,top,1,0,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top,0,1,bottom,0,0,(GLfloat)bottom);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,left, 0, top-1);
+ tesselate_strip_t(display_mode, top, 0, 1, bottom, 0, 0,
+ (GLfloat) bottom);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, left, 0, top - 1);
/* tesselate_strip_t(display_mode,0,top-1,1,0,bottom-1,0,
(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top-1,0,1,bottom-1,0,0,
- (GLfloat)bottom);
- tesselate_bottom_right_corner(display_mode,top-1,bottom-1,
- (GLfloat)(1.0/right),(GLfloat)(1.0/bottom));
+ tesselate_strip_t(display_mode, top - 1, 0, 1, bottom - 1, 0, 0,
+ (GLfloat) bottom);
+ tesselate_bottom_right_corner(display_mode, top - 1, bottom - 1,
+ (GLfloat) (1.0 / right),
+ (GLfloat) (1.0 / bottom));
/* tesselate_strip_s(display_mode,1,left,top-1,1,right,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left,1,top-1,right,1,right,
- (GLfloat)right);
- }
- }
- else
- if(top==bottom)
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right, 1, top);
- tesselate_strip_s(display_mode,0,right,1,0,left,0,(GLfloat)left);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right, 0, top);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,left, 0, top-1);
+ tesselate_strip_s(display_mode, left, 1, top - 1, right, 1, right,
+ (GLfloat) right);
+ }
+ }
+ else if (top == bottom) {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right, 1, top);
+ tesselate_strip_s(display_mode, 0, right, 1, 0, left, 0,
+ (GLfloat) left);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right, 0, top);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, left, 0, top - 1);
/* tesselate_strip_s(display_mode,0,left,top-1,0,right,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left,0,top-1,right,0,right,
- (GLfloat)right);
- }
- }
- else
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right-1, 1, bottom);
- tesselate_strip_s(display_mode,0,right-1,1,0,left-1,0,
- (GLfloat)left);
- tesselate_top_left_corner(display_mode,right-1,left-1,
- (GLfloat)(1.0/left),(GLfloat)(1.0/top));
- tesselate_strip_t(display_mode,1,bottom,right-1,1,top,top,
- (GLfloat)top);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right-1, 0, bottom);
- tesselate_strip_t(display_mode,0,bottom,right-1,0,top,top,
- (GLfloat)top);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,left-1, 0, bottom-1);
- tesselate_strip_t(display_mode,0,bottom-1,left-1,0,top-1,top,
- (GLfloat)top);
- tesselate_top_right_corner(display_mode,left-1,bottom-1,right,top,
- (GLfloat)(1.0/right),(GLfloat)(1.0/top));
+ tesselate_strip_s(display_mode, left, 0, top - 1, right, 0, right,
+ (GLfloat) right);
+ }
+ }
+ else {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right - 1, 1, bottom);
+ tesselate_strip_s(display_mode, 0, right - 1, 1, 0, left - 1, 0,
+ (GLfloat) left);
+ tesselate_top_left_corner(display_mode, right - 1, left - 1,
+ (GLfloat) (1.0 / left),
+ (GLfloat) (1.0 / top));
+ tesselate_strip_t(display_mode, 1, bottom, right - 1, 1, top, top,
+ (GLfloat) top);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right - 1, 0, bottom);
+ tesselate_strip_t(display_mode, 0, bottom, right - 1, 0, top, top,
+ (GLfloat) top);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, left - 1, 0, bottom - 1);
+ tesselate_strip_t(display_mode, 0, bottom - 1, left - 1, 0, top - 1,
+ top, (GLfloat) top);
+ tesselate_top_right_corner(display_mode, left - 1, bottom - 1, right,
+ top, (GLfloat) (1.0 / right),
+ (GLfloat) (1.0 / top));
/* tesselate_strip_s(display_mode,0,left-1,bottom-1,0,right-1,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left-1,0,bottom-1,right-1,0,right,
- (GLfloat)right);
- }
- }
+ tesselate_strip_s(display_mode, left - 1, 0, bottom - 1, right - 1,
+ 0, right, (GLfloat) right);
+ }
+ }
}
/* draw NURBS surface in OUTLINE POLYGON mode */
static void
-draw_polygon_mode( GLenum display_mode, GLUnurbsObj *nobj,
- new_ctrl_type *new_ctrl, GLint *sfactors, GLint *tfactors )
+draw_polygon_mode(GLenum display_mode, GLUnurbsObj * nobj,
+ new_ctrl_type * new_ctrl, GLint * sfactors,
+ GLint * tfactors)
{
- GLsizei offset;
- GLint t_bezier_cnt,s_bezier_cnt;
- GLboolean do_color,do_normal,do_texture;
- GLint i,j;
+ GLsizei offset;
+ GLint t_bezier_cnt, s_bezier_cnt;
+ GLboolean do_color, do_normal, do_texture;
+ GLint i, j;
- t_bezier_cnt=new_ctrl->t_bezier_cnt;
- s_bezier_cnt=new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if(new_ctrl->color_ctrl)
- {
- glEnable(nobj->surface.color.type);
- do_color=GL_TRUE;
- }
- else
- do_color=GL_FALSE;
- if(new_ctrl->normal_ctrl)
- {
- glEnable(nobj->surface.normal.type);
- do_normal=GL_TRUE;
- }
- else
- do_normal=GL_FALSE;
- if(new_ctrl->texture_ctrl)
- {
- glEnable(nobj->surface.texture.type);
- do_texture=GL_TRUE;
- }
- else
- do_texture=GL_FALSE;
- for(j=0; j<s_bezier_cnt; j++)
- {
- for(i=0; i<t_bezier_cnt; i++)
- {
- offset=j*t_bezier_cnt + i;
- if(fine_culling_test_3D(nobj,*(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,new_ctrl->geom_t_stride,
- nobj->surface.geom.dim))
- continue;
- glMap2f(nobj->surface.geom.type,0.0,1.0,new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder,0.0,1.0,new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,*(new_ctrl->geom_offsets + offset));
- if(do_color)
- {
- glMap2f(nobj->surface.color.type,0.0,1.0,
- new_ctrl->color_s_stride,nobj->surface.color.sorder,
- 0.0,1.0,new_ctrl->color_t_stride,nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if(do_normal)
- {
- glMap2f(nobj->surface.normal.type,0.0,1.0,
- new_ctrl->normal_s_stride,nobj->surface.normal.sorder,
- 0.0,1.0,new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets+offset));
- }
- if(do_texture)
- {
- glMap2f(nobj->surface.texture.type,0.0,1.0,
- new_ctrl->texture_s_stride,nobj->surface.texture.sorder,
- 0.0,1.0,new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets+offset));
- }
+ t_bezier_cnt = new_ctrl->t_bezier_cnt;
+ s_bezier_cnt = new_ctrl->s_bezier_cnt;
+ glEnable(nobj->surface.geom.type);
+ if (new_ctrl->color_ctrl) {
+ glEnable(nobj->surface.color.type);
+ do_color = GL_TRUE;
+ }
+ else
+ do_color = GL_FALSE;
+ if (new_ctrl->normal_ctrl) {
+ glEnable(nobj->surface.normal.type);
+ do_normal = GL_TRUE;
+ }
+ else
+ do_normal = GL_FALSE;
+ if (new_ctrl->texture_ctrl) {
+ glEnable(nobj->surface.texture.type);
+ do_texture = GL_TRUE;
+ }
+ else
+ do_texture = GL_FALSE;
+ for (j = 0; j < s_bezier_cnt; j++) {
+ for (i = 0; i < t_bezier_cnt; i++) {
+ offset = j * t_bezier_cnt + i;
+ if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder,
+ new_ctrl->geom_s_stride,
+ new_ctrl->geom_t_stride,
+ nobj->surface.geom.dim)) continue;
+ glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
+ nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
+ nobj->surface.geom.torder,
+ *(new_ctrl->geom_offsets + offset));
+ if (do_color) {
+ glMap2f(nobj->surface.color.type, 0.0, 1.0,
+ new_ctrl->color_s_stride, nobj->surface.color.sorder,
+ 0.0, 1.0, new_ctrl->color_t_stride,
+ nobj->surface.color.torder,
+ *(new_ctrl->color_offsets + offset));
+ }
+ if (do_normal) {
+ glMap2f(nobj->surface.normal.type, 0.0, 1.0,
+ new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
+ 0.0, 1.0, new_ctrl->normal_t_stride,
+ nobj->surface.normal.torder,
+ *(new_ctrl->normal_offsets + offset));
+ }
+ if (do_texture) {
+ glMap2f(nobj->surface.texture.type, 0.0, 1.0,
+ new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
+ 0.0, 1.0, new_ctrl->texture_t_stride,
+ nobj->surface.texture.torder,
+ *(new_ctrl->texture_offsets + offset));
+ }
/* glMapGrid2f(sfactors[j*3+0],0.0,1.0,tfactors[i*3+0],0.0,1.0);
glEvalMesh2(display_mode,0,sfactors[j*3+0],0,tfactors[i*3+0]);*/
- nurbs_map_bezier(display_mode,sfactors,tfactors,s_bezier_cnt,
- t_bezier_cnt,j,i);
- }
- }
+ nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
+ t_bezier_cnt, j, i);
+ }
+ }
}
/* draw NURBS surface in OUTLINE POLYGON mode */
#if 0
static void
-draw_patch_mode( GLenum display_mode, GLUnurbsObj *nobj,
- new_ctrl_type *new_ctrl, GLint *sfactors, GLint *tfactors )
+draw_patch_mode(GLenum display_mode, GLUnurbsObj * nobj,
+ new_ctrl_type * new_ctrl, GLint * sfactors, GLint * tfactors)
{
- GLsizei offset;
- GLint t_bezier_cnt,s_bezier_cnt;
- GLboolean do_color,do_normal,do_texture;
- GLint i,j;
+ GLsizei offset;
+ GLint t_bezier_cnt, s_bezier_cnt;
+ GLboolean do_color, do_normal, do_texture;
+ GLint i, j;
- t_bezier_cnt=new_ctrl->t_bezier_cnt;
- s_bezier_cnt=new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if(new_ctrl->color_ctrl)
- {
- glEnable(nobj->surface.color.type);
- do_color=GL_TRUE;
- }
- else
- do_color=GL_FALSE;
- if(new_ctrl->normal_ctrl)
- {
- glEnable(nobj->surface.normal.type);
- do_normal=GL_TRUE;
- }
- else
- do_normal=GL_FALSE;
- if(new_ctrl->texture_ctrl)
- {
- glEnable(nobj->surface.texture.type);
- do_texture=GL_TRUE;
- }
- else
- do_texture=GL_FALSE;
- for(j=0; j<s_bezier_cnt; j++)
- {
- for(i=0; i<t_bezier_cnt; i++)
- {
- offset=j*t_bezier_cnt + i;
- if(fine_culling_test_3D(nobj,*(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,new_ctrl->geom_t_stride,
- nobj->surface.geom.dim))
- continue;
- glMap2f(nobj->surface.geom.type,0.0,1.0,new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder,0.0,1.0,new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,*(new_ctrl->geom_offsets + offset));
- if(do_color)
- {
- glMap2f(nobj->surface.color.type,0.0,1.0,
- new_ctrl->color_s_stride,nobj->surface.color.sorder,
- 0.0,1.0,new_ctrl->color_t_stride,nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if(do_normal)
- {
- glMap2f(nobj->surface.normal.type,0.0,1.0,
- new_ctrl->normal_s_stride,nobj->surface.normal.sorder,
- 0.0,1.0,new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets+offset));
- }
- if(do_texture)
- {
- glMap2f(nobj->surface.texture.type,0.0,1.0,
- new_ctrl->texture_s_stride,nobj->surface.texture.sorder,
- 0.0,1.0,new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets+offset));
- }
- nurbs_map_bezier(display_mode,sfactors,tfactors,s_bezier_cnt,
- t_bezier_cnt,i,j);
+ t_bezier_cnt = new_ctrl->t_bezier_cnt;
+ s_bezier_cnt = new_ctrl->s_bezier_cnt;
+ glEnable(nobj->surface.geom.type);
+ if (new_ctrl->color_ctrl) {
+ glEnable(nobj->surface.color.type);
+ do_color = GL_TRUE;
+ }
+ else
+ do_color = GL_FALSE;
+ if (new_ctrl->normal_ctrl) {
+ glEnable(nobj->surface.normal.type);
+ do_normal = GL_TRUE;
+ }
+ else
+ do_normal = GL_FALSE;
+ if (new_ctrl->texture_ctrl) {
+ glEnable(nobj->surface.texture.type);
+ do_texture = GL_TRUE;
+ }
+ else
+ do_texture = GL_FALSE;
+ for (j = 0; j < s_bezier_cnt; j++) {
+ for (i = 0; i < t_bezier_cnt; i++) {
+ offset = j * t_bezier_cnt + i;
+ if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder,
+ new_ctrl->geom_s_stride,
+ new_ctrl->geom_t_stride,
+ nobj->surface.geom.dim)) continue;
+ glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
+ nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
+ nobj->surface.geom.torder,
+ *(new_ctrl->geom_offsets + offset));
+ if (do_color) {
+ glMap2f(nobj->surface.color.type, 0.0, 1.0,
+ new_ctrl->color_s_stride, nobj->surface.color.sorder,
+ 0.0, 1.0, new_ctrl->color_t_stride,
+ nobj->surface.color.torder,
+ *(new_ctrl->color_offsets + offset));
+ }
+ if (do_normal) {
+ glMap2f(nobj->surface.normal.type, 0.0, 1.0,
+ new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
+ 0.0, 1.0, new_ctrl->normal_t_stride,
+ nobj->surface.normal.torder,
+ *(new_ctrl->normal_offsets + offset));
+ }
+ if (do_texture) {
+ glMap2f(nobj->surface.texture.type, 0.0, 1.0,
+ new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
+ 0.0, 1.0, new_ctrl->texture_t_stride,
+ nobj->surface.texture.torder,
+ *(new_ctrl->texture_offsets + offset));
+ }
+ nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
+ t_bezier_cnt, i, j);
/* glMapGrid2f(sfactors[j],0.0,1.0,tfactors[i],0.0,1.0);
glEvalMesh2(display_mode,0,sfactors[j],0,tfactors[i]);*/
- }
- }
+ }
+ }
}
#endif
-void
-init_new_ctrl(new_ctrl_type *p)
+static void
+init_new_ctrl(new_ctrl_type * p)
{
- p->geom_ctrl=p->color_ctrl=p->normal_ctrl=p->texture_ctrl=NULL;
- p->geom_offsets=p->color_offsets=p->normal_offsets=p->texture_offsets=NULL;
- p->s_bezier_cnt=p->t_bezier_cnt=0;
+ p->geom_ctrl = p->color_ctrl = p->normal_ctrl = p->texture_ctrl = NULL;
+ p->geom_offsets = p->color_offsets = p->normal_offsets =
+ p->texture_offsets = NULL;
+ p->s_bezier_cnt = p->t_bezier_cnt = 0;
}
-GLenum
-augment_new_ctrl(GLUnurbsObj *nobj, new_ctrl_type *p)
+
+static GLenum
+augment_new_ctrl(GLUnurbsObj * nobj, new_ctrl_type * p)
{
- GLsizei offset_size;
- GLint i,j;
+ GLsizei offset_size;
+ GLint i, j;
- p->s_bezier_cnt=(p->geom_s_pt_cnt)/(nobj->surface.geom.sorder);
- p->t_bezier_cnt=(p->geom_t_pt_cnt)/(nobj->surface.geom.torder);
- offset_size=(p->s_bezier_cnt)*(p->t_bezier_cnt);
- p->geom_t_stride=nobj->surface.geom.dim;
- p->geom_s_stride=(p->geom_t_pt_cnt)*(nobj->surface.geom.dim);
- p->color_t_stride=nobj->surface.color.dim;
- p->color_s_stride=(p->color_t_pt_cnt)*(nobj->surface.color.dim);
- p->normal_t_stride=nobj->surface.normal.dim;
- p->normal_s_stride=(p->normal_t_pt_cnt)*(nobj->surface.normal.dim);
- p->texture_t_stride=nobj->surface.texture.dim;
- p->texture_s_stride=(p->texture_t_pt_cnt)*(nobj->surface.texture.dim);
- if((p->geom_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->color_ctrl)
- if((p->color_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->normal_ctrl)
- if((p->normal_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->texture_ctrl)
- if((p->texture_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->geom_offsets + i*(p->t_bezier_cnt) + j) =
- p->geom_ctrl + i*(nobj->surface.geom.sorder)*
- (nobj->surface.geom.dim)*(p->geom_t_pt_cnt) +
- j*(nobj->surface.geom.dim)*(nobj->surface.geom.torder);
- if(p->color_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->color_offsets + i*(p->t_bezier_cnt) + j) =
- p->color_ctrl + i*(nobj->surface.color.sorder)*
- (nobj->surface.color.dim)*(p->color_t_pt_cnt) +
- j*(nobj->surface.color.dim)*(nobj->surface.color.torder);
- if(p->normal_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->normal_offsets + i*(p->t_bezier_cnt) + j) =
- p->normal_ctrl + i*(nobj->surface.normal.sorder)*
- (nobj->surface.normal.dim)*(p->normal_t_pt_cnt) +
- j*(nobj->surface.normal.dim)*(nobj->surface.normal.torder);
- if(p->texture_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->texture_offsets + i*(p->t_bezier_cnt) + j) =
- p->texture_ctrl + i*(nobj->surface.texture.sorder)*
- (nobj->surface.texture.dim)*(p->texture_t_pt_cnt) +
- j*(nobj->surface.texture.dim)*(nobj->surface.texture.torder);
- return GLU_NO_ERROR;
+ p->s_bezier_cnt = (p->geom_s_pt_cnt) / (nobj->surface.geom.sorder);
+ p->t_bezier_cnt = (p->geom_t_pt_cnt) / (nobj->surface.geom.torder);
+ offset_size = (p->s_bezier_cnt) * (p->t_bezier_cnt);
+ p->geom_t_stride = nobj->surface.geom.dim;
+ p->geom_s_stride = (p->geom_t_pt_cnt) * (nobj->surface.geom.dim);
+ p->color_t_stride = nobj->surface.color.dim;
+ p->color_s_stride = (p->color_t_pt_cnt) * (nobj->surface.color.dim);
+ p->normal_t_stride = nobj->surface.normal.dim;
+ p->normal_s_stride = (p->normal_t_pt_cnt) * (nobj->surface.normal.dim);
+ p->texture_t_stride = nobj->surface.texture.dim;
+ p->texture_s_stride = (p->texture_t_pt_cnt) * (nobj->surface.texture.dim);
+ if (
+ (p->geom_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->color_ctrl)
+ if (
+ (p->color_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->normal_ctrl)
+ if (
+ (p->normal_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->texture_ctrl)
+ if (
+ (p->texture_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->geom_offsets + i * (p->t_bezier_cnt) + j) =
+ p->geom_ctrl + i * (nobj->surface.geom.sorder) *
+ (nobj->surface.geom.dim) * (p->geom_t_pt_cnt) +
+ j * (nobj->surface.geom.dim) * (nobj->surface.geom.torder);
+ if (p->color_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->color_offsets + i * (p->t_bezier_cnt) + j) =
+ p->color_ctrl + i * (nobj->surface.color.sorder) *
+ (nobj->surface.color.dim) * (p->color_t_pt_cnt) +
+ j * (nobj->surface.color.dim) * (nobj->surface.color.torder);
+ if (p->normal_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->normal_offsets + i * (p->t_bezier_cnt) + j) =
+ p->normal_ctrl + i * (nobj->surface.normal.sorder) *
+ (nobj->surface.normal.dim) * (p->normal_t_pt_cnt) +
+ j * (nobj->surface.normal.dim) * (nobj->surface.normal.torder);
+ if (p->texture_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->texture_offsets + i * (p->t_bezier_cnt) + j) =
+ p->texture_ctrl + i * (nobj->surface.texture.sorder) *
+ (nobj->surface.texture.dim) * (p->texture_t_pt_cnt) +
+ j * (nobj->surface.texture.dim) *
+ (nobj->surface.texture.torder);
+ return GLU_NO_ERROR;
}
/* main NURBS surface procedure */
void
-do_nurbs_surface( GLUnurbsObj *nobj )
+do_nurbs_surface(GLUnurbsObj * nobj)
{
- GLint *sfactors,*tfactors;
- new_ctrl_type new_ctrl;
+ GLint *sfactors, *tfactors;
+ new_ctrl_type new_ctrl;
- /* test user supplied data */
- if(test_nurbs_surfaces(nobj)!=GLU_NO_ERROR)
- return;
+ /* test user supplied data */
+ if (test_nurbs_surfaces(nobj) != GLU_NO_ERROR)
+ return;
- init_new_ctrl(&new_ctrl);
+ init_new_ctrl(&new_ctrl);
- if(convert_surfs(nobj,&new_ctrl)!=GLU_NO_ERROR)
- return;
- if(augment_new_ctrl(nobj,&new_ctrl)!=GLU_NO_ERROR)
- return;
- switch(nobj->sampling_method)
- {
- case GLU_PATH_LENGTH:
- if(glu_do_sampling_3D(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_DOMAIN_DISTANCE:
- if(glu_do_sampling_uv(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_PARAMETRIC_ERROR:
- if(glu_do_sampling_param_3D(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- default:
- abort();
- }
- glFrontFace(GL_CW);
- switch(nobj->display_mode)
- {
- case GLU_FILL:
+ if (convert_surfs(nobj, &new_ctrl) != GLU_NO_ERROR)
+ return;
+ if (augment_new_ctrl(nobj, &new_ctrl) != GLU_NO_ERROR)
+ return;
+ switch (nobj->sampling_method) {
+ case GLU_PATH_LENGTH:
+ if (glu_do_sampling_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ case GLU_DOMAIN_DISTANCE:
+ if (glu_do_sampling_uv(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ case GLU_PARAMETRIC_ERROR:
+ if (glu_do_sampling_param_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ default:
+ abort();
+ }
+ glFrontFace(GL_CW);
+ switch (nobj->display_mode) {
+ case GLU_FILL:
/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_FILL,nobj,&new_ctrl,sfactors,tfactors);
- break;
- case GLU_OUTLINE_POLYGON:
- /* TODO - missing trimming handeling */
+ draw_polygon_mode(GL_FILL, nobj, &new_ctrl, sfactors, tfactors);
+ break;
+ case GLU_OUTLINE_POLYGON:
+ /* TODO - missing trimming handeling */
/* just for now - no OUTLINE_PATCH mode
draw_patch_mode(GL_LINE,nobj,&new_ctrl,sfactors,tfactors);
break; */
- case GLU_OUTLINE_PATCH:
+ case GLU_OUTLINE_PATCH:
/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_LINE,nobj,&new_ctrl,sfactors,tfactors);
- break;
- default:
- abort(); /* TODO: is this OK? */
- }
- free(sfactors);
- free(tfactors);
- free_new_ctrl(&new_ctrl);
+ draw_polygon_mode(GL_LINE, nobj, &new_ctrl, sfactors, tfactors);
+ break;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ free(sfactors);
+ free(tfactors);
+ free_new_ctrl(&new_ctrl);
}
-
-/* $Id: nurbsutl.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
+/* $Id: nurbsutl.c,v 1.2 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 2.4
- * Copyright (C) 1995-1997 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
/*
- * $Log: nurbsutl.c,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.8 1999/06/08 00:44:51 brianp
- * OpenStep updates (pete@ohm.york.ac.uk)
- *
- * Revision 1.7 1998/07/26 02:07:59 brianp
- * updated for Windows compilation per Ted Jump
- *
- * Revision 1.6 1997/10/29 02:02:20 brianp
- * various MS Windows compiler changes (David Bucciarelli, v20 3dfx driver)
- *
- * Revision 1.5 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.4 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.3 1997/05/27 03:19:54 brianp
- * minor clean-up
- *
- * Revision 1.2 1997/05/27 03:00:16 brianp
- * incorporated Bogdan's new NURBS code
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
-/*
* NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
* See README2 for more info.
*/
#endif
-GLenum
-test_knot(GLint nknots, GLfloat *knot, GLint order)
+GLenum test_knot(GLint nknots, GLfloat * knot, GLint order)
{
- GLsizei i;
- GLint knot_mult;
- GLfloat tmp_knot;
-
- tmp_knot=knot[0];
- knot_mult=1;
- for(i=1;i<nknots;i++)
- {
- if(knot[i] < tmp_knot)
- return GLU_NURBS_ERROR4;
- if(fabs(tmp_knot-knot[i]) > EPSILON)
- {
- if(knot_mult>order)
- return GLU_NURBS_ERROR5;
- knot_mult=1;
- tmp_knot=knot[i];
- }
- else
- ++knot_mult;
- }
- return GLU_NO_ERROR;
+ GLsizei i;
+ GLint knot_mult;
+ GLfloat tmp_knot;
+
+ tmp_knot = knot[0];
+ knot_mult = 1;
+ for (i = 1; i < nknots; i++) {
+ if (knot[i] < tmp_knot)
+ return GLU_NURBS_ERROR4;
+ if (fabs(tmp_knot - knot[i]) > EPSILON) {
+ if (knot_mult > order)
+ return GLU_NURBS_ERROR5;
+ knot_mult = 1;
+ tmp_knot = knot[i];
+ }
+ else
+ ++knot_mult;
+ }
+ return GLU_NO_ERROR;
}
static int
/* qsort function */
#if defined(WIN32) && !defined(OPENSTEP)
-__cdecl
+ __cdecl
#endif
knot_sort(const void *a, const void *b)
{
- GLfloat x,y;
-
- x=*((GLfloat *)a);
- y=*((GLfloat *)b);
- if(fabs(x-y) < EPSILON)
- return 0;
- if(x > y)
- return 1;
- return -1;
+ GLfloat x, y;
+
+ x = *((GLfloat *) a);
+ y = *((GLfloat *) b);
+ if (fabs(x - y) < EPSILON)
+ return 0;
+ if (x > y)
+ return 1;
+ return -1;
}
/* insert into dest knot all values within the valid range from src knot */
/* that do not appear in dest */
void
-collect_unified_knot(knot_str_type *dest, knot_str_type *src,
- GLfloat maximal_min_knot, GLfloat minimal_max_knot)
+collect_unified_knot(knot_str_type * dest, knot_str_type * src,
+ GLfloat maximal_min_knot, GLfloat minimal_max_knot)
{
- GLfloat *src_knot,*dest_knot;
- GLint src_t_min,src_t_max,dest_t_min,dest_t_max;
- GLint src_nknots,dest_nknots;
- GLint i,j,k,new_cnt;
- GLboolean not_found_flag;
-
- src_knot=src->unified_knot;
- dest_knot=dest->unified_knot;
- src_t_min=src->t_min;
- src_t_max=src->t_max;
- dest_t_min=dest->t_min;
- dest_t_max=dest->t_max;
- src_nknots=src->unified_nknots;
- dest_nknots=dest->unified_nknots;
-
- k=new_cnt=dest_nknots;
- for(i=src_t_min;i<=src_t_max;i++)
- if(src_knot[i] - maximal_min_knot > -EPSILON &&
- src_knot[i] - minimal_max_knot < EPSILON)
- {
- not_found_flag=GL_TRUE;
- for(j=dest_t_min;j<=dest_t_max;j++)
- if(fabs(dest_knot[j]-src_knot[i]) < EPSILON)
- {
- not_found_flag=GL_FALSE;
- break;
- }
- if(not_found_flag)
- {
- /* knot from src is not in dest - add this knot to dest */
- dest_knot[k++]=src_knot[i];
- ++new_cnt;
- ++(dest->t_max); /* the valid range widens */
- ++(dest->delta_nknots); /* increment the extra knot value counter */
- }
- }
- dest->unified_nknots=new_cnt;
- qsort((void *)dest_knot,(size_t)new_cnt,(size_t)sizeof(GLfloat),
- &knot_sort);
+ GLfloat *src_knot, *dest_knot;
+ GLint src_t_min, src_t_max, dest_t_min, dest_t_max;
+ GLint src_nknots, dest_nknots;
+ GLint i, j, k, new_cnt;
+ GLboolean not_found_flag;
+
+ src_knot = src->unified_knot;
+ dest_knot = dest->unified_knot;
+ src_t_min = src->t_min;
+ src_t_max = src->t_max;
+ dest_t_min = dest->t_min;
+ dest_t_max = dest->t_max;
+ src_nknots = src->unified_nknots;
+ dest_nknots = dest->unified_nknots;
+
+ k = new_cnt = dest_nknots;
+ for (i = src_t_min; i <= src_t_max; i++)
+ if (src_knot[i] - maximal_min_knot > -EPSILON &&
+ src_knot[i] - minimal_max_knot < EPSILON) {
+ not_found_flag = GL_TRUE;
+ for (j = dest_t_min; j <= dest_t_max; j++)
+ if (fabs(dest_knot[j] - src_knot[i]) < EPSILON) {
+ not_found_flag = GL_FALSE;
+ break;
+ }
+ if (not_found_flag) {
+ /* knot from src is not in dest - add this knot to dest */
+ dest_knot[k++] = src_knot[i];
+ ++new_cnt;
+ ++(dest->t_max); /* the valid range widens */
+ ++(dest->delta_nknots); /* increment the extra knot value counter */
+ }
+ }
+ dest->unified_nknots = new_cnt;
+ qsort((void *) dest_knot, (size_t) new_cnt, (size_t) sizeof(GLfloat),
+ &knot_sort);
}
/* basing on the new common knot range for all attributes set */
/* t_min and t_max values for each knot - they will be used later on */
/* by explode_knot() and calc_new_ctrl_pts */
static void
-set_new_t_min_t_max(knot_str_type *geom_knot, knot_str_type *color_knot,
- knot_str_type *normal_knot, knot_str_type *texture_knot,
- GLfloat maximal_min_knot, GLfloat minimal_max_knot)
+set_new_t_min_t_max(knot_str_type * geom_knot, knot_str_type * color_knot,
+ knot_str_type * normal_knot, knot_str_type * texture_knot,
+ GLfloat maximal_min_knot, GLfloat minimal_max_knot)
{
- GLuint t_min,t_max,cnt;
-
- if(minimal_max_knot-maximal_min_knot < EPSILON)
- {
- /* knot common range empty */
- geom_knot->t_min=geom_knot->t_max=0;
- color_knot->t_min=color_knot->t_max=0;
- normal_knot->t_min=normal_knot->t_max=0;
- texture_knot->t_min=texture_knot->t_max=0;
- }
- else
- {
- if(geom_knot->unified_knot!=NULL)
- {
- cnt=geom_knot->unified_nknots;
- for(t_min=0;t_min<cnt;t_min++)
- if(fabs((geom_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON)
- break;
- for(t_max=cnt-1;t_max;t_max--)
- if(fabs((geom_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON)
- break;
- }
- else
- if(geom_knot->nknots)
- {
- cnt=geom_knot->nknots;
- for(t_min=0;t_min<cnt;t_min++)
- if(fabs((geom_knot->knot)[t_min] - maximal_min_knot) < EPSILON)
- break;
- for(t_max=cnt-1;t_max;t_max--)
- if(fabs((geom_knot->knot)[t_max] - minimal_max_knot) < EPSILON)
- break;
- }
- geom_knot->t_min=t_min;
- geom_knot->t_max=t_max;
- if(color_knot->unified_knot!=NULL)
- {
- cnt=color_knot->unified_nknots;
- for(t_min=0;t_min<cnt;t_min++)
- if(fabs((color_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON)
- break;
- for(t_max=cnt-1;t_max;t_max--)
- if(fabs((color_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON)
- break;
- color_knot->t_min=t_min;
- color_knot->t_max=t_max;
- }
- if(normal_knot->unified_knot!=NULL)
- {
- cnt=normal_knot->unified_nknots;
- for(t_min=0;t_min<cnt;t_min++)
- if(fabs((normal_knot->unified_knot)[t_min] - maximal_min_knot) <
- EPSILON)
- break;
- for(t_max=cnt-1;t_max;t_max--)
- if(fabs((normal_knot->unified_knot)[t_max] - minimal_max_knot) <
- EPSILON)
- break;
- normal_knot->t_min=t_min;
- normal_knot->t_max=t_max;
- }
- if(texture_knot->unified_knot!=NULL)
- {
- cnt=texture_knot->unified_nknots;
- for(t_min=0;t_min<cnt;t_min++)
- if(fabs((texture_knot->unified_knot)[t_min] - maximal_min_knot)
- < EPSILON)
- break;
- for(t_max=cnt-1;t_max;t_max--)
- if(fabs((texture_knot->unified_knot)[t_max] - minimal_max_knot)
- < EPSILON)
- break;
- texture_knot->t_min=t_min;
- texture_knot->t_max=t_max;
- }
- }
+ GLuint t_min, t_max, cnt;
+
+ if (minimal_max_knot - maximal_min_knot < EPSILON) {
+ /* knot common range empty */
+ geom_knot->t_min = geom_knot->t_max = 0;
+ color_knot->t_min = color_knot->t_max = 0;
+ normal_knot->t_min = normal_knot->t_max = 0;
+ texture_knot->t_min = texture_knot->t_max = 0;
+ }
+ else {
+ if (geom_knot->unified_knot != NULL) {
+ cnt = geom_knot->unified_nknots;
+ for (t_min = 0; t_min < cnt; t_min++)
+ if (fabs((geom_knot->unified_knot)[t_min] - maximal_min_knot) <
+ EPSILON) break;
+ for (t_max = cnt - 1; t_max; t_max--)
+ if (fabs((geom_knot->unified_knot)[t_max] - minimal_max_knot) <
+ EPSILON) break;
+ }
+ else if (geom_knot->nknots) {
+ cnt = geom_knot->nknots;
+ for (t_min = 0; t_min < cnt; t_min++)
+ if (fabs((geom_knot->knot)[t_min] - maximal_min_knot) < EPSILON)
+ break;
+ for (t_max = cnt - 1; t_max; t_max--)
+ if (fabs((geom_knot->knot)[t_max] - minimal_max_knot) < EPSILON)
+ break;
+ }
+ geom_knot->t_min = t_min;
+ geom_knot->t_max = t_max;
+ if (color_knot->unified_knot != NULL) {
+ cnt = color_knot->unified_nknots;
+ for (t_min = 0; t_min < cnt; t_min++)
+ if (fabs((color_knot->unified_knot)[t_min] - maximal_min_knot) <
+ EPSILON) break;
+ for (t_max = cnt - 1; t_max; t_max--)
+ if (fabs((color_knot->unified_knot)[t_max] - minimal_max_knot) <
+ EPSILON) break;
+ color_knot->t_min = t_min;
+ color_knot->t_max = t_max;
+ }
+ if (normal_knot->unified_knot != NULL) {
+ cnt = normal_knot->unified_nknots;
+ for (t_min = 0; t_min < cnt; t_min++)
+ if (fabs((normal_knot->unified_knot)[t_min] - maximal_min_knot) <
+ EPSILON) break;
+ for (t_max = cnt - 1; t_max; t_max--)
+ if (fabs((normal_knot->unified_knot)[t_max] - minimal_max_knot) <
+ EPSILON) break;
+ normal_knot->t_min = t_min;
+ normal_knot->t_max = t_max;
+ }
+ if (texture_knot->unified_knot != NULL) {
+ cnt = texture_knot->unified_nknots;
+ for (t_min = 0; t_min < cnt; t_min++)
+ if (fabs((texture_knot->unified_knot)[t_min] - maximal_min_knot)
+ < EPSILON)
+ break;
+ for (t_max = cnt - 1; t_max; t_max--)
+ if (fabs((texture_knot->unified_knot)[t_max] - minimal_max_knot)
+ < EPSILON)
+ break;
+ texture_knot->t_min = t_min;
+ texture_knot->t_max = t_max;
+ }
+ }
}
/* modify all knot valid ranges in such a way that all have the same */
/* range, common to all knots */
/* do this by knot insertion */
GLenum
-select_knot_working_range(GLUnurbsObj *nobj,knot_str_type *geom_knot,
- knot_str_type *color_knot, knot_str_type *normal_knot,
- knot_str_type *texture_knot)
+select_knot_working_range(GLUnurbsObj * nobj, knot_str_type * geom_knot,
+ knot_str_type * color_knot,
+ knot_str_type * normal_knot,
+ knot_str_type * texture_knot)
{
- GLint max_nknots;
- GLfloat maximal_min_knot,minimal_max_knot;
- GLint i;
-
- /* find the maximum modified knot length */
- max_nknots=geom_knot->nknots;
- if(color_knot->unified_knot)
- max_nknots+=color_knot->nknots;
- if(normal_knot->unified_knot)
- max_nknots+=normal_knot->nknots;
- if(texture_knot->unified_knot)
- max_nknots+=texture_knot->nknots;
- maximal_min_knot=(geom_knot->knot)[geom_knot->t_min];
- minimal_max_knot=(geom_knot->knot)[geom_knot->t_max];
- /* any attirb data ? */
- if(max_nknots!=geom_knot->nknots)
- {
- /* allocate space for the unified knots */
- if((geom_knot->unified_knot=
- (GLfloat *)malloc(sizeof(GLfloat)*max_nknots))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- geom_knot->unified_nknots=geom_knot->nknots;
- for(i=0;i<geom_knot->nknots;i++)
- (geom_knot->unified_knot)[i]=(geom_knot->knot)[i];
- if(color_knot->unified_knot)
- {
- if((color_knot->knot)[color_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot=(color_knot->knot)[color_knot->t_min];
- if(minimal_max_knot - (color_knot->knot)[color_knot->t_max] >
- EPSILON)
- minimal_max_knot=(color_knot->knot)[color_knot->t_max];
- if((color_knot->unified_knot=
- (GLfloat *)malloc(sizeof(GLfloat)*max_nknots))==NULL)
- {
- free(geom_knot->unified_knot);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- color_knot->unified_nknots=color_knot->nknots;
- for(i=0;i<color_knot->nknots;i++)
- (color_knot->unified_knot)[i]=(color_knot->knot)[i];
- }
- if(normal_knot->unified_knot)
- {
- if((normal_knot->knot)[normal_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot=(normal_knot->knot)[normal_knot->t_min];
- if(minimal_max_knot - (normal_knot->knot)[normal_knot->t_max] >
- EPSILON)
- minimal_max_knot=(normal_knot->knot)[normal_knot->t_max];
- if((normal_knot->unified_knot=
- (GLfloat *)malloc(sizeof(GLfloat)*max_nknots))==NULL)
- {
- free(geom_knot->unified_knot);
- free(color_knot->unified_knot);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- normal_knot->unified_nknots=normal_knot->nknots;
- for(i=0;i<normal_knot->nknots;i++)
- (normal_knot->unified_knot)[i]=(normal_knot->knot)[i];
- }
- if(texture_knot->unified_knot)
- {
- if((texture_knot->knot)[texture_knot->t_min] - maximal_min_knot >
- EPSILON)
- maximal_min_knot=(texture_knot->knot)[texture_knot->t_min];
- if(minimal_max_knot - (texture_knot->knot)[texture_knot->t_max] >
- EPSILON)
- minimal_max_knot=(texture_knot->knot)[texture_knot->t_max];
- if((texture_knot->unified_knot=
- (GLfloat *)malloc(sizeof(GLfloat)*max_nknots))==NULL)
- {
- free(geom_knot->unified_knot);
- free(color_knot->unified_knot);
- free(normal_knot->unified_knot);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- /* copy the original knot to the unified one */
- texture_knot->unified_nknots=texture_knot->nknots;
- for(i=0;i<texture_knot->nknots;i++)
- (texture_knot->unified_knot)[i]=(texture_knot->knot)[i];
- }
- /* work on the geometry knot with all additional knot values */
- /* appearing in attirbutive knots */
- if(minimal_max_knot-maximal_min_knot < EPSILON)
- {
- /* empty working range */
- geom_knot->unified_nknots=0;
- color_knot->unified_nknots=0;
- normal_knot->unified_nknots=0;
- texture_knot->unified_nknots=0;
- }
- else
- {
- if(color_knot->unified_knot)
- collect_unified_knot(geom_knot,color_knot,maximal_min_knot,
- minimal_max_knot);
- if(normal_knot->unified_knot)
- collect_unified_knot(geom_knot,normal_knot,maximal_min_knot,
- minimal_max_knot);
- if(texture_knot->unified_knot)
- collect_unified_knot(geom_knot,texture_knot,maximal_min_knot,
- minimal_max_knot);
- /* since we have now built the "unified" geometry knot */
- /* add same knot values to all attributive knots */
- if(color_knot->unified_knot)
- collect_unified_knot(color_knot,geom_knot,maximal_min_knot,
- minimal_max_knot);
- if(normal_knot->unified_knot)
- collect_unified_knot(normal_knot,geom_knot,maximal_min_knot,
- minimal_max_knot);
- if(texture_knot->unified_knot)
- collect_unified_knot(texture_knot,geom_knot,maximal_min_knot,
- minimal_max_knot);
- }
- }
- set_new_t_min_t_max(geom_knot,color_knot,normal_knot,texture_knot,
- maximal_min_knot,minimal_max_knot);
- return GLU_NO_ERROR;
+ GLint max_nknots;
+ GLfloat maximal_min_knot, minimal_max_knot;
+ GLint i;
+
+ /* find the maximum modified knot length */
+ max_nknots = geom_knot->nknots;
+ if (color_knot->unified_knot)
+ max_nknots += color_knot->nknots;
+ if (normal_knot->unified_knot)
+ max_nknots += normal_knot->nknots;
+ if (texture_knot->unified_knot)
+ max_nknots += texture_knot->nknots;
+ maximal_min_knot = (geom_knot->knot)[geom_knot->t_min];
+ minimal_max_knot = (geom_knot->knot)[geom_knot->t_max];
+ /* any attirb data ? */
+ if (max_nknots != geom_knot->nknots) {
+ /* allocate space for the unified knots */
+ if ((geom_knot->unified_knot =
+ (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ /* copy the original knot to the unified one */
+ geom_knot->unified_nknots = geom_knot->nknots;
+ for (i = 0; i < geom_knot->nknots; i++)
+ (geom_knot->unified_knot)[i] = (geom_knot->knot)[i];
+ if (color_knot->unified_knot) {
+ if ((color_knot->knot)[color_knot->t_min] - maximal_min_knot >
+ EPSILON)
+ maximal_min_knot = (color_knot->knot)[color_knot->t_min];
+ if (minimal_max_knot - (color_knot->knot)[color_knot->t_max] >
+ EPSILON)
+ minimal_max_knot = (color_knot->knot)[color_knot->t_max];
+ if ((color_knot->unified_knot =
+ (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
+ free(geom_knot->unified_knot);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ /* copy the original knot to the unified one */
+ color_knot->unified_nknots = color_knot->nknots;
+ for (i = 0; i < color_knot->nknots; i++)
+ (color_knot->unified_knot)[i] = (color_knot->knot)[i];
+ }
+ if (normal_knot->unified_knot) {
+ if ((normal_knot->knot)[normal_knot->t_min] - maximal_min_knot >
+ EPSILON)
+ maximal_min_knot = (normal_knot->knot)[normal_knot->t_min];
+ if (minimal_max_knot - (normal_knot->knot)[normal_knot->t_max] >
+ EPSILON)
+ minimal_max_knot = (normal_knot->knot)[normal_knot->t_max];
+ if ((normal_knot->unified_knot =
+ (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
+ free(geom_knot->unified_knot);
+ free(color_knot->unified_knot);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ /* copy the original knot to the unified one */
+ normal_knot->unified_nknots = normal_knot->nknots;
+ for (i = 0; i < normal_knot->nknots; i++)
+ (normal_knot->unified_knot)[i] = (normal_knot->knot)[i];
+ }
+ if (texture_knot->unified_knot) {
+ if ((texture_knot->knot)[texture_knot->t_min] - maximal_min_knot >
+ EPSILON)
+ maximal_min_knot = (texture_knot->knot)[texture_knot->t_min];
+ if (minimal_max_knot - (texture_knot->knot)[texture_knot->t_max] >
+ EPSILON)
+ minimal_max_knot = (texture_knot->knot)[texture_knot->t_max];
+ if ((texture_knot->unified_knot =
+ (GLfloat *) malloc(sizeof(GLfloat) * max_nknots)) == NULL) {
+ free(geom_knot->unified_knot);
+ free(color_knot->unified_knot);
+ free(normal_knot->unified_knot);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ /* copy the original knot to the unified one */
+ texture_knot->unified_nknots = texture_knot->nknots;
+ for (i = 0; i < texture_knot->nknots; i++)
+ (texture_knot->unified_knot)[i] = (texture_knot->knot)[i];
+ }
+ /* work on the geometry knot with all additional knot values */
+ /* appearing in attirbutive knots */
+ if (minimal_max_knot - maximal_min_knot < EPSILON) {
+ /* empty working range */
+ geom_knot->unified_nknots = 0;
+ color_knot->unified_nknots = 0;
+ normal_knot->unified_nknots = 0;
+ texture_knot->unified_nknots = 0;
+ }
+ else {
+ if (color_knot->unified_knot)
+ collect_unified_knot(geom_knot, color_knot, maximal_min_knot,
+ minimal_max_knot);
+ if (normal_knot->unified_knot)
+ collect_unified_knot(geom_knot, normal_knot, maximal_min_knot,
+ minimal_max_knot);
+ if (texture_knot->unified_knot)
+ collect_unified_knot(geom_knot, texture_knot, maximal_min_knot,
+ minimal_max_knot);
+ /* since we have now built the "unified" geometry knot */
+ /* add same knot values to all attributive knots */
+ if (color_knot->unified_knot)
+ collect_unified_knot(color_knot, geom_knot, maximal_min_knot,
+ minimal_max_knot);
+ if (normal_knot->unified_knot)
+ collect_unified_knot(normal_knot, geom_knot, maximal_min_knot,
+ minimal_max_knot);
+ if (texture_knot->unified_knot)
+ collect_unified_knot(texture_knot, geom_knot, maximal_min_knot,
+ minimal_max_knot);
+ }
+ }
+ set_new_t_min_t_max(geom_knot, color_knot, normal_knot, texture_knot,
+ maximal_min_knot, minimal_max_knot);
+ return GLU_NO_ERROR;
}
void
-free_unified_knots(knot_str_type *geom_knot, knot_str_type *color_knot,
- knot_str_type *normal_knot, knot_str_type *texture_knot)
+free_unified_knots(knot_str_type * geom_knot, knot_str_type * color_knot,
+ knot_str_type * normal_knot, knot_str_type * texture_knot)
{
- if(geom_knot->unified_knot)
- free(geom_knot->unified_knot);
- if(color_knot->unified_knot)
- free(color_knot->unified_knot);
- if(normal_knot->unified_knot)
- free(normal_knot->unified_knot);
- if(texture_knot->unified_knot)
- free(texture_knot->unified_knot);
+ if (geom_knot->unified_knot)
+ free(geom_knot->unified_knot);
+ if (color_knot->unified_knot)
+ free(color_knot->unified_knot);
+ if (normal_knot->unified_knot)
+ free(normal_knot->unified_knot);
+ if (texture_knot->unified_knot)
+ free(texture_knot->unified_knot);
}
-GLenum
-explode_knot(knot_str_type *the_knot)
+GLenum explode_knot(knot_str_type * the_knot)
{
- GLfloat *knot,*new_knot;
- GLint nknots,n_new_knots=0;
- GLint t_min,t_max;
- GLint ord;
- GLsizei i,j,k;
- GLfloat tmp_float;
-
- if(the_knot->unified_knot)
- {
- knot=the_knot->unified_knot;
- nknots=the_knot->unified_nknots;
- }
- else
- {
- knot=the_knot->knot;
- nknots=the_knot->nknots;
- }
- ord=the_knot->order;
- t_min=the_knot->t_min;
- t_max=the_knot->t_max;
-
- for(i=t_min;i<=t_max;)
- {
- tmp_float=knot[i];
- for(j=0;j<ord && (i+j)<=t_max;j++)
- if(fabs(tmp_float-knot[i+j])>EPSILON)
- break;
- n_new_knots+=ord-j;
- i+=j;
- }
- /* alloc space for new_knot */
- if((new_knot=(GLfloat *)malloc(sizeof(GLfloat)*(nknots+n_new_knots)))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- /* fill in new knot */
- for(j=0;j<t_min;j++)
- new_knot[j]=knot[j];
- for(i=j;i<=t_max;i++)
- {
- tmp_float=knot[i];
- for(k=0;k<ord;k++)
- {
- new_knot[j++]=knot[i];
- if(tmp_float==knot[i+1])
- i++;
- }
- }
- for(i=t_max+1;i<(int)nknots;i++)
- new_knot[j++]=knot[i];
- /* fill in the knot structure */
- the_knot->new_knot=new_knot;
- the_knot->delta_nknots+=n_new_knots;
- the_knot->t_max+=n_new_knots;
- return GLU_NO_ERROR;
+ GLfloat *knot, *new_knot;
+ GLint nknots, n_new_knots = 0;
+ GLint t_min, t_max;
+ GLint ord;
+ GLsizei i, j, k;
+ GLfloat tmp_float;
+
+ if (the_knot->unified_knot) {
+ knot = the_knot->unified_knot;
+ nknots = the_knot->unified_nknots;
+ }
+ else {
+ knot = the_knot->knot;
+ nknots = the_knot->nknots;
+ }
+ ord = the_knot->order;
+ t_min = the_knot->t_min;
+ t_max = the_knot->t_max;
+
+ for (i = t_min; i <= t_max;) {
+ tmp_float = knot[i];
+ for (j = 0; j < ord && (i + j) <= t_max; j++)
+ if (fabs(tmp_float - knot[i + j]) > EPSILON)
+ break;
+ n_new_knots += ord - j;
+ i += j;
+ }
+ /* alloc space for new_knot */
+ if (
+ (new_knot =
+ (GLfloat *) malloc(sizeof(GLfloat) * (nknots + n_new_knots))) == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ /* fill in new knot */
+ for (j = 0; j < t_min; j++)
+ new_knot[j] = knot[j];
+ for (i = j; i <= t_max; i++) {
+ tmp_float = knot[i];
+ for (k = 0; k < ord; k++) {
+ new_knot[j++] = knot[i];
+ if (tmp_float == knot[i + 1])
+ i++;
+ }
+ }
+ for (i = t_max + 1; i < (int) nknots; i++)
+ new_knot[j++] = knot[i];
+ /* fill in the knot structure */
+ the_knot->new_knot = new_knot;
+ the_knot->delta_nknots += n_new_knots;
+ the_knot->t_max += n_new_knots;
+ return GLU_NO_ERROR;
}
-GLenum
-calc_alphas(knot_str_type *the_knot)
+GLenum calc_alphas(knot_str_type * the_knot)
{
- GLfloat tmp_float;
- int i,j,k,m,n;
- int order;
- GLfloat *alpha,*alpha_new,*tmp_alpha;
- GLfloat denom;
- GLfloat *knot,*new_knot;
-
-
- knot=the_knot->knot;
- order=the_knot->order;
- new_knot=the_knot->new_knot;
- n=the_knot->nknots-the_knot->order;
- m=n+the_knot->delta_nknots;
- if((alpha=(GLfloat *)malloc(sizeof(GLfloat)*n*m))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((alpha_new=(GLfloat *)malloc(sizeof(GLfloat)*n*m))==NULL)
- {
- free(alpha);
- return GLU_OUT_OF_MEMORY;
- }
- for(j=0;j<m;j++)
- {
- for(i=0;i<n;i++)
- {
- if((knot[i] <= new_knot[j]) && (new_knot[j] < knot[i+1]))
- tmp_float=1.0;
- else
- tmp_float=0.0;
- alpha[i+j*n]=tmp_float;
- }
- }
- for(k=1;k<order;k++)
- {
- for(j=0;j<m;j++)
- for(i=0;i<n;i++)
- {
- denom=knot[i+k]-knot[i];
- if(fabs(denom)<EPSILON)
- tmp_float=0.0;
- else
- tmp_float=(new_knot[j+k]-knot[i])/denom*
- alpha[i+j*n];
- denom=knot[i+k+1]-knot[i+1];
- if(fabs(denom)>EPSILON)
- tmp_float+=(knot[i+k+1]-new_knot[j+k])/denom*
- alpha[(i+1)+j*n];
- alpha_new[i+j*n]=tmp_float;
- }
- tmp_alpha=alpha_new;
- alpha_new=alpha;
- alpha=tmp_alpha;
- }
- the_knot->alpha=alpha;
- free(alpha_new);
- return GLU_NO_ERROR;
+ GLfloat tmp_float;
+ int i, j, k, m, n;
+ int order;
+ GLfloat *alpha, *alpha_new, *tmp_alpha;
+ GLfloat denom;
+ GLfloat *knot, *new_knot;
+
+
+ knot = the_knot->knot;
+ order = the_knot->order;
+ new_knot = the_knot->new_knot;
+ n = the_knot->nknots - the_knot->order;
+ m = n + the_knot->delta_nknots;
+ if ((alpha = (GLfloat *) malloc(sizeof(GLfloat) * n * m)) == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((alpha_new = (GLfloat *) malloc(sizeof(GLfloat) * n * m)) == NULL) {
+ free(alpha);
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (j = 0; j < m; j++) {
+ for (i = 0; i < n; i++) {
+ if ((knot[i] <= new_knot[j]) && (new_knot[j] < knot[i + 1]))
+ tmp_float = 1.0;
+ else
+ tmp_float = 0.0;
+ alpha[i + j * n] = tmp_float;
+ }
+ }
+ for (k = 1; k < order; k++) {
+ for (j = 0; j < m; j++)
+ for (i = 0; i < n; i++) {
+ denom = knot[i + k] - knot[i];
+ if (fabs(denom) < EPSILON)
+ tmp_float = 0.0;
+ else
+ tmp_float = (new_knot[j + k] - knot[i]) / denom *
+ alpha[i + j * n];
+ denom = knot[i + k + 1] - knot[i + 1];
+ if (fabs(denom) > EPSILON)
+ tmp_float += (knot[i + k + 1] - new_knot[j + k]) / denom *
+ alpha[(i + 1) + j * n];
+ alpha_new[i + j * n] = tmp_float;
+ }
+ tmp_alpha = alpha_new;
+ alpha_new = alpha;
+ alpha = tmp_alpha;
+ }
+ the_knot->alpha = alpha;
+ free(alpha_new);
+ return GLU_NO_ERROR;
}
GLenum
-calc_new_ctrl_pts(GLfloat *ctrl,GLint stride,knot_str_type *the_knot,
- GLint dim,GLfloat **new_ctrl,GLint *ncontrol)
+calc_new_ctrl_pts(GLfloat * ctrl, GLint stride, knot_str_type * the_knot,
+ GLint dim, GLfloat ** new_ctrl, GLint * ncontrol)
{
- GLsizei i,j,k,l,m,n;
- GLsizei index1,index2;
- GLfloat *alpha;
- GLfloat *new_knot;
-
- new_knot=the_knot->new_knot;
- n=the_knot->nknots-the_knot->order;
- alpha=the_knot->alpha;
-
- m=the_knot->t_max+1-the_knot->t_min-the_knot->order;
- k=the_knot->t_min;
- /* allocate space for new control points */
- if((*new_ctrl=(GLfloat *)malloc(sizeof(GLfloat)*dim*m))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- for(j=0;j<m;j++)
- {
- for(l=0;l<dim;l++)
- (*new_ctrl)[j*dim+l]=0.0;
- for(i=0;i<n;i++)
- {
- index1=i+(j+k)*n;
- index2=i*stride;
- for(l=0;l<dim;l++)
- (*new_ctrl)[j*dim+l]+=alpha[index1]*ctrl[index2+l];
- }
- }
- *ncontrol=(GLint)m;
- return GLU_NO_ERROR;
+ GLsizei i, j, k, l, m, n;
+ GLsizei index1, index2;
+ GLfloat *alpha;
+ GLfloat *new_knot;
+
+ new_knot = the_knot->new_knot;
+ n = the_knot->nknots - the_knot->order;
+ alpha = the_knot->alpha;
+
+ m = the_knot->t_max + 1 - the_knot->t_min - the_knot->order;
+ k = the_knot->t_min;
+ /* allocate space for new control points */
+ if ((*new_ctrl = (GLfloat *) malloc(sizeof(GLfloat) * dim * m)) == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (j = 0; j < m; j++) {
+ for (l = 0; l < dim; l++)
+ (*new_ctrl)[j * dim + l] = 0.0;
+ for (i = 0; i < n; i++) {
+ index1 = i + (j + k) * n;
+ index2 = i * stride;
+ for (l = 0; l < dim; l++)
+ (*new_ctrl)[j * dim + l] += alpha[index1] * ctrl[index2 + l];
+ }
+ }
+ *ncontrol = (GLint) m;
+ return GLU_NO_ERROR;
}
static GLint
-calc_factor(GLfloat *pts,GLint order,GLint indx,GLint stride,GLfloat tolerance,
- GLint dim)
+calc_factor(GLfloat * pts, GLint order, GLint indx, GLint stride,
+ GLfloat tolerance, GLint dim)
{
- GLdouble model[16],proj[16];
- GLint viewport[4];
- GLdouble x,y,z,w,winx1,winy1,winz,winx2,winy2;
- GLint i;
- GLdouble len,dx,dy;
-
- glGetDoublev(GL_MODELVIEW_MATRIX,model);
- glGetDoublev(GL_PROJECTION_MATRIX,proj);
- glGetIntegerv(GL_VIEWPORT,viewport);
- if(dim==4)
- {
- w=(GLdouble)pts[indx+3];
- x=(GLdouble)pts[indx]/w;
- y=(GLdouble)pts[indx+1]/w;
- z=(GLdouble)pts[indx+2]/w;
- gluProject(x,y,z,model,proj,viewport,&winx1,&winy1,&winz);
- len=0.0;
- for(i=1;i<order;i++)
- {
- w=(GLdouble)pts[indx+i*stride+3];
- x=(GLdouble)pts[indx+i*stride]/w;
- y=(GLdouble)pts[indx+i*stride+1]/w;
- z=(GLdouble)pts[indx+i*stride+2]/w;
- if(gluProject(x,y,z,model,proj,viewport,&winx2,&winy2,&winz))
- {
- dx=winx2-winx1;
- dy=winy2-winy1;
- len+=sqrt(dx*dx+dy*dy);
- }
- winx1=winx2; winy1=winy2;
- }
- }
- else
- {
- x=(GLdouble)pts[indx];
- y=(GLdouble)pts[indx+1];
- if(dim==2)
- z=0.0;
- else
- z=(GLdouble)pts[indx+2];
- gluProject(x,y,z,model,proj,viewport,&winx1,&winy1,&winz);
- len=0.0;
- for(i=1;i<order;i++)
- {
- x=(GLdouble)pts[indx+i*stride];
- y=(GLdouble)pts[indx+i*stride+1];
- if(dim==2)
- z=0.0;
- else
- z=(GLdouble)pts[indx+i*stride+2];
- if(gluProject(x,y,z,model,proj,viewport,&winx2,&winy2,&winz))
- {
- dx=winx2-winx1;
- dy=winy2-winy1;
- len+=sqrt(dx*dx+dy*dy);
- }
- winx1=winx2; winy1=winy2;
- }
- }
- len /= tolerance;
- return ((GLint)len+1);
+ GLdouble model[16], proj[16];
+ GLint viewport[4];
+ GLdouble x, y, z, w, winx1, winy1, winz, winx2, winy2;
+ GLint i;
+ GLdouble len, dx, dy;
+
+ glGetDoublev(GL_MODELVIEW_MATRIX, model);
+ glGetDoublev(GL_PROJECTION_MATRIX, proj);
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ if (dim == 4) {
+ w = (GLdouble) pts[indx + 3];
+ x = (GLdouble) pts[indx] / w;
+ y = (GLdouble) pts[indx + 1] / w;
+ z = (GLdouble) pts[indx + 2] / w;
+ gluProject(x, y, z, model, proj, viewport, &winx1, &winy1, &winz);
+ len = 0.0;
+ for (i = 1; i < order; i++) {
+ w = (GLdouble) pts[indx + i * stride + 3];
+ x = (GLdouble) pts[indx + i * stride] / w;
+ y = (GLdouble) pts[indx + i * stride + 1] / w;
+ z = (GLdouble) pts[indx + i * stride + 2] / w;
+ if (gluProject
+ (x, y, z, model, proj, viewport, &winx2, &winy2, &winz)) {
+ dx = winx2 - winx1;
+ dy = winy2 - winy1;
+ len += sqrt(dx * dx + dy * dy);
+ }
+ winx1 = winx2;
+ winy1 = winy2;
+ }
+ }
+ else {
+ x = (GLdouble) pts[indx];
+ y = (GLdouble) pts[indx + 1];
+ if (dim == 2)
+ z = 0.0;
+ else
+ z = (GLdouble) pts[indx + 2];
+ gluProject(x, y, z, model, proj, viewport, &winx1, &winy1, &winz);
+ len = 0.0;
+ for (i = 1; i < order; i++) {
+ x = (GLdouble) pts[indx + i * stride];
+ y = (GLdouble) pts[indx + i * stride + 1];
+ if (dim == 2)
+ z = 0.0;
+ else
+ z = (GLdouble) pts[indx + i * stride + 2];
+ if (gluProject
+ (x, y, z, model, proj, viewport, &winx2, &winy2, &winz)) {
+ dx = winx2 - winx1;
+ dy = winy2 - winy1;
+ len += sqrt(dx * dx + dy * dy);
+ }
+ winx1 = winx2;
+ winy1 = winy2;
+ }
+ }
+ len /= tolerance;
+ return ((GLint) len + 1);
}
/* we can't use the Mesa evaluators - no way to get the point coords */
/* because I'm lazy, I reuse the ones from eval.c */
static void
-bezier_curve(GLfloat *cp, GLfloat *out, GLfloat t,
- GLuint dim, GLuint order, GLint offset)
+bezier_curve(GLfloat * cp, GLfloat * out, GLfloat t,
+ GLuint dim, GLuint order, GLint offset)
{
- GLfloat s, powert;
- GLuint i, k, bincoeff;
-
- if(order >= 2)
- {
- bincoeff = order-1;
- s = 1.0-t;
-
- for(k=0; k<dim; k++)
- out[k] = s*cp[k] + bincoeff*t*cp[offset+k];
-
- for(i=2, cp+=2*offset, powert=t*t; i<order; i++, powert*=t, cp +=offset)
- {
- bincoeff *= order-i;
- bincoeff /= i;
-
- for(k=0; k<dim; k++)
- out[k] = s*out[k] + bincoeff*powert*cp[k];
- }
- }
- else /* order=1 -> constant curve */
- {
- for(k=0; k<dim; k++)
- out[k] = cp[k];
- }
+ GLfloat s, powert;
+ GLuint i, k, bincoeff;
+
+ if (order >= 2) {
+ bincoeff = order - 1;
+ s = 1.0 - t;
+
+ for (k = 0; k < dim; k++)
+ out[k] = s * cp[k] + bincoeff * t * cp[offset + k];
+
+ for (i = 2, cp += 2 * offset, powert = t * t; i < order;
+ i++, powert *= t, cp += offset) {
+ bincoeff *= order - i;
+ bincoeff /= i;
+
+ for (k = 0; k < dim; k++)
+ out[k] = s * out[k] + bincoeff * powert * cp[k];
+ }
+ }
+ else { /* order=1 -> constant curve */
+
+ for (k = 0; k < dim; k++)
+ out[k] = cp[k];
+ }
}
static GLint
-calc_parametric_factor(GLfloat *pts,GLint order,GLint indx,GLint stride,
- GLfloat tolerance,GLint dim)
+calc_parametric_factor(GLfloat * pts, GLint order, GLint indx, GLint stride,
+ GLfloat tolerance, GLint dim)
{
- GLdouble model[16],proj[16];
- GLint viewport[4];
- GLdouble x,y,z,w,x1,y1,z1,x2,y2,z2,x3,y3,z3;
- GLint i;
- GLint P;
- GLfloat bez_pt[4];
- GLdouble len=0.0,tmp,z_med;
-
- P = 2*(order+2);
- glGetDoublev(GL_MODELVIEW_MATRIX,model);
- glGetDoublev(GL_PROJECTION_MATRIX,proj);
- glGetIntegerv(GL_VIEWPORT,viewport);
- z_med = (viewport[2] + viewport[3]) * 0.5;
- switch(dim)
- {
- case 4:
- for(i=1;i<P;i++)
- {
- bezier_curve(pts+indx, bez_pt, (GLfloat)i/(GLfloat)P, 4,
- order,stride);
- w = (GLdouble)bez_pt[3];
- x = (GLdouble)bez_pt[0] / w;
- y = (GLdouble)bez_pt[1] / w;
- z = (GLdouble)bez_pt[2] / w;
- gluProject(x,y,z,model,proj,viewport,&x3,&y3,&z3);
- z3 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i-1)/(GLfloat)P, 4,
- order,stride);
- w = (GLdouble)bez_pt[3];
- x = (GLdouble)bez_pt[0] / w;
- y = (GLdouble)bez_pt[1] / w;
- z = (GLdouble)bez_pt[2] / w;
- gluProject(x,y,z,model,proj,viewport,&x1,&y1,&z1);
- z1 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i+1)/(GLfloat)P, 4,
- order,stride);
- w = (GLdouble)bez_pt[3];
- x = (GLdouble)bez_pt[0] / w;
- y = (GLdouble)bez_pt[1] / w;
- z = (GLdouble)bez_pt[2] / w;
- gluProject(x,y,z,model,proj,viewport,&x2,&y2,&z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2-x1;
- y = y2-y1;
- z = z2-z1;
- tmp = sqrt(x*x+y*y+z*z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3*x+y3*y+z3*z-x1*x-y1*y-z1*z;
- x = x1+x*tmp-x3;
- y = y1+y*tmp-y3;
- z = z1+z*tmp-z3;
- tmp = sqrt(x*x+y*y+z*z);
- if(tmp > len)
- len = tmp;
- }
- break;
- case 3:
- for(i=1;i<P;i++)
- {
- bezier_curve(pts+indx, bez_pt, (GLfloat)i/(GLfloat)P, 3,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = (GLdouble)bez_pt[2];
- gluProject(x,y,z,model,proj,viewport,&x3,&y3,&z3);
- z3 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i-1)/(GLfloat)P, 3,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = (GLdouble)bez_pt[2];
- gluProject(x,y,z,model,proj,viewport,&x1,&y1,&z1);
- z1 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i+1)/(GLfloat)P, 3,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = (GLdouble)bez_pt[2];
- gluProject(x,y,z,model,proj,viewport,&x2,&y2,&z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2-x1;
- y = y2-y1;
- z = z2-z1;
- tmp = sqrt(x*x+y*y+z*z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3*x+y3*y+z3*z-x1*x-y1*y-z1*z;
- x = x1+x*tmp-x3;
- y = y1+y*tmp-y3;
- z = z1+z*tmp-z3;
- tmp = sqrt(x*x+y*y+z*z);
- if(tmp > len)
- len = tmp;
- }
- break;
- case 2:
- for(i=1;i<P;i++)
- {
- bezier_curve(pts+indx, bez_pt, (GLfloat)i/(GLfloat)P, 2,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = 0.0;
- gluProject(x,y,z,model,proj,viewport,&x3,&y3,&z3);
- z3 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i-1)/(GLfloat)P, 2,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = 0.0;
- gluProject(x,y,z,model,proj,viewport,&x1,&y1,&z1);
- z1 *= z_med;
- bezier_curve(pts+indx, bez_pt, (GLfloat)(i+1)/(GLfloat)P, 2,
- order,stride);
- x = (GLdouble)bez_pt[0];
- y = (GLdouble)bez_pt[1];
- z = 0.0;
- gluProject(x,y,z,model,proj,viewport,&x2,&y2,&z2);
- z2 *= z_med;
- /* calc distance between point (x3,y3,z3) and line segment */
- /* <x1,y1,z1><x2,y2,z2> */
- x = x2-x1;
- y = y2-y1;
- z = z2-z1;
- tmp = sqrt(x*x+y*y+z*z);
- x /= tmp;
- y /= tmp;
- z /= tmp;
- tmp = x3*x+y3*y+z3*z-x1*x-y1*y-z1*z;
- x = x1+x*tmp-x3;
- y = y1+y*tmp-y3;
- z = z1+z*tmp-z3;
- tmp = sqrt(x*x+y*y+z*z);
- if(tmp > len)
- len = tmp;
- }
- break;
-
- }
- if(len < tolerance)
- return (order);
- else
- return (GLint)(sqrt(len/tolerance)*(order+2)+1);
+ GLdouble model[16], proj[16];
+ GLint viewport[4];
+ GLdouble x, y, z, w, x1, y1, z1, x2, y2, z2, x3, y3, z3;
+ GLint i;
+ GLint P;
+ GLfloat bez_pt[4];
+ GLdouble len = 0.0, tmp, z_med;
+
+ P = 2 * (order + 2);
+ glGetDoublev(GL_MODELVIEW_MATRIX, model);
+ glGetDoublev(GL_PROJECTION_MATRIX, proj);
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ z_med = (viewport[2] + viewport[3]) * 0.5;
+ switch (dim) {
+ case 4:
+ for (i = 1; i < P; i++) {
+ bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 4,
+ order, stride);
+ w = (GLdouble) bez_pt[3];
+ x = (GLdouble) bez_pt[0] / w;
+ y = (GLdouble) bez_pt[1] / w;
+ z = (GLdouble) bez_pt[2] / w;
+ gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
+ z3 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 4,
+ order, stride);
+ w = (GLdouble) bez_pt[3];
+ x = (GLdouble) bez_pt[0] / w;
+ y = (GLdouble) bez_pt[1] / w;
+ z = (GLdouble) bez_pt[2] / w;
+ gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
+ z1 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 4,
+ order, stride);
+ w = (GLdouble) bez_pt[3];
+ x = (GLdouble) bez_pt[0] / w;
+ y = (GLdouble) bez_pt[1] / w;
+ z = (GLdouble) bez_pt[2] / w;
+ gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
+ z2 *= z_med;
+ /* calc distance between point (x3,y3,z3) and line segment */
+ /* <x1,y1,z1><x2,y2,z2> */
+ x = x2 - x1;
+ y = y2 - y1;
+ z = z2 - z1;
+ tmp = sqrt(x * x + y * y + z * z);
+ x /= tmp;
+ y /= tmp;
+ z /= tmp;
+ tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
+ x = x1 + x * tmp - x3;
+ y = y1 + y * tmp - y3;
+ z = z1 + z * tmp - z3;
+ tmp = sqrt(x * x + y * y + z * z);
+ if (tmp > len)
+ len = tmp;
+ }
+ break;
+ case 3:
+ for (i = 1; i < P; i++) {
+ bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 3,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = (GLdouble) bez_pt[2];
+ gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
+ z3 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 3,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = (GLdouble) bez_pt[2];
+ gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
+ z1 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 3,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = (GLdouble) bez_pt[2];
+ gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
+ z2 *= z_med;
+ /* calc distance between point (x3,y3,z3) and line segment */
+ /* <x1,y1,z1><x2,y2,z2> */
+ x = x2 - x1;
+ y = y2 - y1;
+ z = z2 - z1;
+ tmp = sqrt(x * x + y * y + z * z);
+ x /= tmp;
+ y /= tmp;
+ z /= tmp;
+ tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
+ x = x1 + x * tmp - x3;
+ y = y1 + y * tmp - y3;
+ z = z1 + z * tmp - z3;
+ tmp = sqrt(x * x + y * y + z * z);
+ if (tmp > len)
+ len = tmp;
+ }
+ break;
+ case 2:
+ for (i = 1; i < P; i++) {
+ bezier_curve(pts + indx, bez_pt, (GLfloat) i / (GLfloat) P, 2,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = 0.0;
+ gluProject(x, y, z, model, proj, viewport, &x3, &y3, &z3);
+ z3 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i - 1) / (GLfloat) P, 2,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = 0.0;
+ gluProject(x, y, z, model, proj, viewport, &x1, &y1, &z1);
+ z1 *= z_med;
+ bezier_curve(pts + indx, bez_pt, (GLfloat) (i + 1) / (GLfloat) P, 2,
+ order, stride);
+ x = (GLdouble) bez_pt[0];
+ y = (GLdouble) bez_pt[1];
+ z = 0.0;
+ gluProject(x, y, z, model, proj, viewport, &x2, &y2, &z2);
+ z2 *= z_med;
+ /* calc distance between point (x3,y3,z3) and line segment */
+ /* <x1,y1,z1><x2,y2,z2> */
+ x = x2 - x1;
+ y = y2 - y1;
+ z = z2 - z1;
+ tmp = sqrt(x * x + y * y + z * z);
+ x /= tmp;
+ y /= tmp;
+ z /= tmp;
+ tmp = x3 * x + y3 * y + z3 * z - x1 * x - y1 * y - z1 * z;
+ x = x1 + x * tmp - x3;
+ y = y1 + y * tmp - y3;
+ z = z1 + z * tmp - z3;
+ tmp = sqrt(x * x + y * y + z * z);
+ if (tmp > len)
+ len = tmp;
+ }
+ break;
+
+ }
+ if (len < tolerance)
+ return (order);
+ else
+ return (GLint) (sqrt(len / tolerance) * (order + 2) + 1);
}
static GLenum
-calc_sampling_3D(new_ctrl_type *new_ctrl, GLfloat tolerance, GLint dim,
- GLint uorder, GLint vorder, GLint **ufactors, GLint **vfactors)
+calc_sampling_3D(new_ctrl_type * new_ctrl, GLfloat tolerance, GLint dim,
+ GLint uorder, GLint vorder, GLint ** ufactors,
+ GLint ** vfactors)
{
- GLfloat *ctrl;
- GLint tmp_factor1,tmp_factor2;
- GLint ufactor_cnt,vfactor_cnt;
- GLint offset1,offset2,offset3;
- GLint i,j;
-
- ufactor_cnt=new_ctrl->s_bezier_cnt;
- vfactor_cnt=new_ctrl->t_bezier_cnt;
- if((*ufactors=(GLint *)malloc(sizeof(GLint)*ufactor_cnt*3))
- ==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((*vfactors=(GLint *)malloc(sizeof(GLint)*vfactor_cnt*3))
- ==NULL)
- {
- free(*ufactors);
- return GLU_OUT_OF_MEMORY;
- }
- ctrl=new_ctrl->geom_ctrl;
- offset1=new_ctrl->geom_t_stride*vorder;
- offset2=new_ctrl->geom_s_stride*uorder;
- for(j=0;j<vfactor_cnt;j++)
- {
- *(*vfactors+j*3+1)=tmp_factor1=calc_factor(ctrl,vorder,
- j*offset1,dim,tolerance,dim);
- /* loop ufactor_cnt-1 times */
- for(i=1;i<ufactor_cnt;i++)
- {
- tmp_factor2=calc_factor(ctrl,vorder,
- j*offset1+i*offset2,dim,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- tmp_factor1=tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*vfactors+j*3+2)=tmp_factor2=calc_factor(ctrl,vorder,
- j*offset1+i*offset2-new_ctrl->geom_s_stride,
- dim,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- *(*vfactors+j*3)=tmp_factor2;
- else
- *(*vfactors+j*3)=tmp_factor1;
- }
- offset3=new_ctrl->geom_s_stride;
- offset2=new_ctrl->geom_s_stride*uorder;
- for(j=0;j<ufactor_cnt;j++)
- {
- *(*ufactors+j*3+1)=tmp_factor1=calc_factor(ctrl,uorder,
- j*offset2,offset3,tolerance,dim);
- /* loop vfactor_cnt-1 times */
- for(i=1;i<vfactor_cnt;i++)
- {
- tmp_factor2=calc_factor(ctrl,uorder,
- j*offset2+i*offset1,offset3,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- tmp_factor1=tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*ufactors+j*3+2)=tmp_factor2=calc_factor(ctrl,uorder,
- j*offset2+i*offset1-new_ctrl->geom_t_stride,
- offset3,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- *(*ufactors+j*3)=tmp_factor2;
- else
- *(*ufactors+j*3)=tmp_factor1;
- }
- return GL_NO_ERROR;
+ GLfloat *ctrl;
+ GLint tmp_factor1, tmp_factor2;
+ GLint ufactor_cnt, vfactor_cnt;
+ GLint offset1, offset2, offset3;
+ GLint i, j;
+
+ ufactor_cnt = new_ctrl->s_bezier_cnt;
+ vfactor_cnt = new_ctrl->t_bezier_cnt;
+ if ((*ufactors = (GLint *) malloc(sizeof(GLint) * ufactor_cnt * 3))
+ == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((*vfactors = (GLint *) malloc(sizeof(GLint) * vfactor_cnt * 3))
+ == NULL) {
+ free(*ufactors);
+ return GLU_OUT_OF_MEMORY;
+ }
+ ctrl = new_ctrl->geom_ctrl;
+ offset1 = new_ctrl->geom_t_stride * vorder;
+ offset2 = new_ctrl->geom_s_stride * uorder;
+ for (j = 0; j < vfactor_cnt; j++) {
+ *(*vfactors + j * 3 + 1) = tmp_factor1 = calc_factor(ctrl, vorder,
+ j * offset1, dim,
+ tolerance, dim);
+ /* loop ufactor_cnt-1 times */
+ for (i = 1; i < ufactor_cnt; i++) {
+ tmp_factor2 = calc_factor(ctrl, vorder,
+ j * offset1 + i * offset2, dim, tolerance,
+ dim);
+ if (tmp_factor2 > tmp_factor1)
+ tmp_factor1 = tmp_factor2;
+ }
+ /* last time for the opposite edge */
+ *(*vfactors + j * 3 + 2) = tmp_factor2 = calc_factor(ctrl, vorder,
+ j * offset1 +
+ i * offset2 -
+ new_ctrl->
+ geom_s_stride, dim,
+ tolerance, dim);
+ if (tmp_factor2 > tmp_factor1)
+ *(*vfactors + j * 3) = tmp_factor2;
+ else
+ *(*vfactors + j * 3) = tmp_factor1;
+ }
+ offset3 = new_ctrl->geom_s_stride;
+ offset2 = new_ctrl->geom_s_stride * uorder;
+ for (j = 0; j < ufactor_cnt; j++) {
+ *(*ufactors + j * 3 + 1) = tmp_factor1 = calc_factor(ctrl, uorder,
+ j * offset2,
+ offset3, tolerance,
+ dim);
+ /* loop vfactor_cnt-1 times */
+ for (i = 1; i < vfactor_cnt; i++) {
+ tmp_factor2 = calc_factor(ctrl, uorder,
+ j * offset2 + i * offset1, offset3,
+ tolerance, dim);
+ if (tmp_factor2 > tmp_factor1)
+ tmp_factor1 = tmp_factor2;
+ }
+ /* last time for the opposite edge */
+ *(*ufactors + j * 3 + 2) = tmp_factor2 = calc_factor(ctrl, uorder,
+ j * offset2 +
+ i * offset1 -
+ new_ctrl->
+ geom_t_stride,
+ offset3, tolerance,
+ dim);
+ if (tmp_factor2 > tmp_factor1)
+ *(*ufactors + j * 3) = tmp_factor2;
+ else
+ *(*ufactors + j * 3) = tmp_factor1;
+ }
+ return GL_NO_ERROR;
}
static GLenum
-calc_sampling_param_3D(new_ctrl_type *new_ctrl, GLfloat tolerance, GLint dim,
- GLint uorder, GLint vorder, GLint **ufactors, GLint **vfactors)
+calc_sampling_param_3D(new_ctrl_type * new_ctrl, GLfloat tolerance, GLint dim,
+ GLint uorder, GLint vorder, GLint ** ufactors,
+ GLint ** vfactors)
{
- GLfloat *ctrl;
- GLint tmp_factor1,tmp_factor2;
- GLint ufactor_cnt,vfactor_cnt;
- GLint offset1,offset2,offset3;
- GLint i,j;
-
- ufactor_cnt=new_ctrl->s_bezier_cnt;
- vfactor_cnt=new_ctrl->t_bezier_cnt;
- if((*ufactors=(GLint *)malloc(sizeof(GLint)*ufactor_cnt*3))
- ==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((*vfactors=(GLint *)malloc(sizeof(GLint)*vfactor_cnt*3))
- ==NULL)
- {
- free(*ufactors);
- return GLU_OUT_OF_MEMORY;
- }
- ctrl=new_ctrl->geom_ctrl;
- offset1=new_ctrl->geom_t_stride*vorder;
- offset2=new_ctrl->geom_s_stride*uorder;
- for(j=0;j<vfactor_cnt;j++)
- {
- *(*vfactors+j*3+1)=tmp_factor1=calc_parametric_factor(ctrl,vorder,
- j*offset1,dim,tolerance,dim);
- /* loop ufactor_cnt-1 times */
- for(i=1;i<ufactor_cnt;i++)
- {
- tmp_factor2=calc_parametric_factor(ctrl,vorder,
- j*offset1+i*offset2,dim,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- tmp_factor1=tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*vfactors+j*3+2)=tmp_factor2=calc_parametric_factor(ctrl,vorder,
- j*offset1+i*offset2-new_ctrl->geom_s_stride,
- dim,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- *(*vfactors+j*3)=tmp_factor2;
- else
- *(*vfactors+j*3)=tmp_factor1;
- }
- offset3=new_ctrl->geom_s_stride;
- offset2=new_ctrl->geom_s_stride*uorder;
- for(j=0;j<ufactor_cnt;j++)
- {
- *(*ufactors+j*3+1)=tmp_factor1=calc_parametric_factor(ctrl,uorder,
- j*offset2,offset3,tolerance,dim);
- /* loop vfactor_cnt-1 times */
- for(i=1;i<vfactor_cnt;i++)
- {
- tmp_factor2=calc_parametric_factor(ctrl,uorder,
- j*offset2+i*offset1,offset3,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- tmp_factor1=tmp_factor2;
- }
- /* last time for the opposite edge */
- *(*ufactors+j*3+2)=tmp_factor2=calc_parametric_factor(ctrl,uorder,
- j*offset2+i*offset1-new_ctrl->geom_t_stride,
- offset3,tolerance,dim);
- if(tmp_factor2>tmp_factor1)
- *(*ufactors+j*3)=tmp_factor2;
- else
- *(*ufactors+j*3)=tmp_factor1;
- }
- return GL_NO_ERROR;
+ GLfloat *ctrl;
+ GLint tmp_factor1, tmp_factor2;
+ GLint ufactor_cnt, vfactor_cnt;
+ GLint offset1, offset2, offset3;
+ GLint i, j;
+
+ ufactor_cnt = new_ctrl->s_bezier_cnt;
+ vfactor_cnt = new_ctrl->t_bezier_cnt;
+ if ((*ufactors = (GLint *) malloc(sizeof(GLint) * ufactor_cnt * 3))
+ == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((*vfactors = (GLint *) malloc(sizeof(GLint) * vfactor_cnt * 3))
+ == NULL) {
+ free(*ufactors);
+ return GLU_OUT_OF_MEMORY;
+ }
+ ctrl = new_ctrl->geom_ctrl;
+ offset1 = new_ctrl->geom_t_stride * vorder;
+ offset2 = new_ctrl->geom_s_stride * uorder;
+ for (j = 0; j < vfactor_cnt; j++) {
+ *(*vfactors + j * 3 + 1) = tmp_factor1 =
+ calc_parametric_factor(ctrl, vorder, j * offset1, dim, tolerance,
+ dim);
+ /* loop ufactor_cnt-1 times */
+ for (i = 1; i < ufactor_cnt; i++) {
+ tmp_factor2 = calc_parametric_factor(ctrl, vorder,
+ j * offset1 + i * offset2, dim,
+ tolerance, dim);
+ if (tmp_factor2 > tmp_factor1)
+ tmp_factor1 = tmp_factor2;
+ }
+ /* last time for the opposite edge */
+ *(*vfactors + j * 3 + 2) = tmp_factor2 =
+ calc_parametric_factor(ctrl, vorder,
+ j * offset1 + i * offset2 -
+ new_ctrl->geom_s_stride, dim, tolerance, dim);
+ if (tmp_factor2 > tmp_factor1)
+ *(*vfactors + j * 3) = tmp_factor2;
+ else
+ *(*vfactors + j * 3) = tmp_factor1;
+ }
+ offset3 = new_ctrl->geom_s_stride;
+ offset2 = new_ctrl->geom_s_stride * uorder;
+ for (j = 0; j < ufactor_cnt; j++) {
+ *(*ufactors + j * 3 + 1) = tmp_factor1 =
+ calc_parametric_factor(ctrl, uorder, j * offset2, offset3, tolerance,
+ dim);
+ /* loop vfactor_cnt-1 times */
+ for (i = 1; i < vfactor_cnt; i++) {
+ tmp_factor2 = calc_parametric_factor(ctrl, uorder,
+ j * offset2 + i * offset1,
+ offset3, tolerance, dim);
+ if (tmp_factor2 > tmp_factor1)
+ tmp_factor1 = tmp_factor2;
+ }
+ /* last time for the opposite edge */
+ *(*ufactors + j * 3 + 2) = tmp_factor2 =
+ calc_parametric_factor(ctrl, uorder,
+ j * offset2 + i * offset1 -
+ new_ctrl->geom_t_stride, offset3, tolerance,
+ dim);
+ if (tmp_factor2 > tmp_factor1)
+ *(*ufactors + j * 3) = tmp_factor2;
+ else
+ *(*ufactors + j * 3) = tmp_factor1;
+ }
+ return GL_NO_ERROR;
}
static GLenum
-calc_sampling_2D(GLfloat *ctrl, GLint cnt, GLint order,
- GLfloat tolerance, GLint dim, GLint **factors)
+calc_sampling_2D(GLfloat * ctrl, GLint cnt, GLint order,
+ GLfloat tolerance, GLint dim, GLint ** factors)
{
- GLint factor_cnt;
- GLint tmp_factor;
- GLint offset;
- GLint i;
-
- factor_cnt=cnt/order;
- if((*factors=(GLint *)malloc(sizeof(GLint)*factor_cnt))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- offset=order*dim;
- for(i=0;i<factor_cnt;i++)
- {
- tmp_factor=calc_factor(ctrl,order,i*offset,dim,tolerance,dim);
- if(tmp_factor == 0)
- (*factors)[i]=1;
- else
- (*factors)[i]=tmp_factor;
- }
- return GL_NO_ERROR;
+ GLint factor_cnt;
+ GLint tmp_factor;
+ GLint offset;
+ GLint i;
+
+ factor_cnt = cnt / order;
+ if ((*factors = (GLint *) malloc(sizeof(GLint) * factor_cnt)) == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ offset = order * dim;
+ for (i = 0; i < factor_cnt; i++) {
+ tmp_factor = calc_factor(ctrl, order, i * offset, dim, tolerance, dim);
+ if (tmp_factor == 0)
+ (*factors)[i] = 1;
+ else
+ (*factors)[i] = tmp_factor;
+ }
+ return GL_NO_ERROR;
}
static void
-set_sampling_and_culling( GLUnurbsObj *nobj )
+set_sampling_and_culling(GLUnurbsObj * nobj)
{
- if(nobj->auto_load_matrix==GL_FALSE)
- {
- GLint i;
- GLfloat m[4];
-
- glPushAttrib( (GLbitfield) (GL_VIEWPORT_BIT | GL_TRANSFORM_BIT));
- for(i=0;i<4;i++)
- m[i]=nobj->sampling_matrices.viewport[i];
- glViewport(m[0],m[1],m[2],m[3]);
- glMatrixMode(GL_PROJECTION);
- glPushMatrix();
- glLoadMatrixf(nobj->sampling_matrices.proj);
- glMatrixMode(GL_MODELVIEW);
- glPushMatrix();
- glLoadMatrixf(nobj->sampling_matrices.model);
- }
+ if (nobj->auto_load_matrix == GL_FALSE) {
+ GLint i;
+ GLfloat m[4];
+
+ glPushAttrib((GLbitfield) (GL_VIEWPORT_BIT | GL_TRANSFORM_BIT));
+ for (i = 0; i < 4; i++)
+ m[i] = nobj->sampling_matrices.viewport[i];
+ glViewport(m[0], m[1], m[2], m[3]);
+ glMatrixMode(GL_PROJECTION);
+ glPushMatrix();
+ glLoadMatrixf(nobj->sampling_matrices.proj);
+ glMatrixMode(GL_MODELVIEW);
+ glPushMatrix();
+ glLoadMatrixf(nobj->sampling_matrices.model);
+ }
}
static void
-revert_sampling_and_culling( GLUnurbsObj *nobj )
+revert_sampling_and_culling(GLUnurbsObj * nobj)
{
- if(nobj->auto_load_matrix==GL_FALSE)
- {
- glMatrixMode(GL_MODELVIEW);
- glPopMatrix();
- glMatrixMode(GL_PROJECTION);
- glPopMatrix();
- glPopAttrib();
- }
+ if (nobj->auto_load_matrix == GL_FALSE) {
+ glMatrixMode(GL_MODELVIEW);
+ glPopMatrix();
+ glMatrixMode(GL_PROJECTION);
+ glPopMatrix();
+ glPopAttrib();
+ }
}
GLenum
-glu_do_sampling_3D( GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- GLint **sfactors, GLint **tfactors)
+glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ GLint ** sfactors, GLint ** tfactors)
{
- GLint dim;
- GLenum err;
-
- *sfactors=NULL;
- *tfactors=NULL;
- dim=nobj->surface.geom.dim;
- set_sampling_and_culling(nobj);
- if((err=calc_sampling_3D(new_ctrl,nobj->sampling_tolerance,dim,
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- sfactors,tfactors))==GLU_ERROR)
- {
- revert_sampling_and_culling(nobj);
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
+ GLint dim;
+ GLenum err;
+
+ *sfactors = NULL;
+ *tfactors = NULL;
+ dim = nobj->surface.geom.dim;
+ set_sampling_and_culling(nobj);
+ if ((err = calc_sampling_3D(new_ctrl, nobj->sampling_tolerance, dim,
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder, sfactors,
+ tfactors)) == GLU_ERROR) {
+ revert_sampling_and_culling(nobj);
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ revert_sampling_and_culling(nobj);
+ return GLU_NO_ERROR;
}
GLenum
-glu_do_sampling_uv( GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- GLint **sfactors, GLint **tfactors)
+glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ GLint ** sfactors, GLint ** tfactors)
{
- GLint s_cnt, t_cnt, i;
- GLint u_steps, v_steps;
-
- s_cnt = new_ctrl->s_bezier_cnt;
- t_cnt = new_ctrl->t_bezier_cnt;
- *sfactors=NULL;
- *tfactors=NULL;
- if((*sfactors=(GLint *)malloc(sizeof(GLint)*s_cnt*3))
- ==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((*tfactors=(GLint *)malloc(sizeof(GLint)*t_cnt*3))
- ==NULL)
- {
- free(*sfactors);
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- v_steps = nobj->v_step;
- for(i=0; i<s_cnt; i++)
- {
- *(*sfactors+i*3) = u_steps;
- *(*sfactors+i*3+1) = u_steps;
- *(*sfactors+i*3+2) = u_steps;
- }
- for(i=0; i<t_cnt; i++)
- {
- *(*tfactors+i*3) = v_steps;
- *(*tfactors+i*3+1) = v_steps;
- *(*tfactors+i*3+2) = v_steps;
- }
- return GLU_NO_ERROR;
+ GLint s_cnt, t_cnt, i;
+ GLint u_steps, v_steps;
+
+ s_cnt = new_ctrl->s_bezier_cnt;
+ t_cnt = new_ctrl->t_bezier_cnt;
+ *sfactors = NULL;
+ *tfactors = NULL;
+ if ((*sfactors = (GLint *) malloc(sizeof(GLint) * s_cnt * 3))
+ == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((*tfactors = (GLint *) malloc(sizeof(GLint) * t_cnt * 3))
+ == NULL) {
+ free(*sfactors);
+ return GLU_OUT_OF_MEMORY;
+ }
+ u_steps = nobj->u_step;
+ v_steps = nobj->v_step;
+ for (i = 0; i < s_cnt; i++) {
+ *(*sfactors + i * 3) = u_steps;
+ *(*sfactors + i * 3 + 1) = u_steps;
+ *(*sfactors + i * 3 + 2) = u_steps;
+ }
+ for (i = 0; i < t_cnt; i++) {
+ *(*tfactors + i * 3) = v_steps;
+ *(*tfactors + i * 3 + 1) = v_steps;
+ *(*tfactors + i * 3 + 2) = v_steps;
+ }
+ return GLU_NO_ERROR;
}
-GLenum
-glu_do_sampling_param_3D( GLUnurbsObj *nobj, new_ctrl_type *new_ctrl,
- GLint **sfactors, GLint **tfactors)
-{
- GLint dim;
- GLenum err;
-
- *sfactors=NULL;
- *tfactors=NULL;
- dim=nobj->surface.geom.dim;
- set_sampling_and_culling(nobj);
- if((err=calc_sampling_param_3D(new_ctrl,nobj->parametric_tolerance,dim,
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- sfactors,tfactors))==GLU_ERROR)
- {
- revert_sampling_and_culling(nobj);
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
-}
GLenum
-glu_do_sampling_2D( GLUnurbsObj *nobj, GLfloat *ctrl, GLint cnt, GLint order,
- GLint dim, GLint **factors)
+glu_do_sampling_param_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
+ GLint ** sfactors, GLint ** tfactors)
{
- GLenum err;
-
- set_sampling_and_culling(nobj);
- err=calc_sampling_2D(ctrl,cnt,order,nobj->sampling_tolerance,dim,
- factors);
- revert_sampling_and_culling(nobj);
- return err;
+ GLint dim;
+ GLenum err;
+
+ *sfactors = NULL;
+ *tfactors = NULL;
+ dim = nobj->surface.geom.dim;
+ set_sampling_and_culling(nobj);
+ if (
+ (err =
+ calc_sampling_param_3D(new_ctrl, nobj->parametric_tolerance, dim,
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder, sfactors,
+ tfactors)) == GLU_ERROR) {
+ revert_sampling_and_culling(nobj);
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ revert_sampling_and_culling(nobj);
+ return GLU_NO_ERROR;
}
-GLenum
-glu_do_sampling_u( GLUnurbsObj *nobj, GLfloat *ctrl, GLint cnt, GLint order,
- GLint dim, GLint **factors)
+static GLenum
+glu_do_sampling_2D(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt, GLint order,
+ GLint dim, GLint ** factors)
{
- GLint i;
- GLint u_steps;
+ GLenum err;
- cnt /= order;
- if((*factors=(GLint *)malloc(sizeof(GLint)*cnt))
- ==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- for(i=0; i<cnt; i++)
- (*factors)[i] = u_steps;
- return GLU_NO_ERROR;
+ set_sampling_and_culling(nobj);
+ err = calc_sampling_2D(ctrl, cnt, order, nobj->sampling_tolerance, dim,
+ factors);
+ revert_sampling_and_culling(nobj);
+ return err;
}
-GLenum
-glu_do_sampling_param_2D( GLUnurbsObj *nobj, GLfloat *ctrl, GLint cnt,
- GLint order, GLint dim, GLint **factors)
+
+static GLenum
+glu_do_sampling_u(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt, GLint order,
+ GLint dim, GLint ** factors)
{
- GLint i;
- GLint u_steps;
- GLfloat tolerance;
+ GLint i;
+ GLint u_steps;
+
+ cnt /= order;
+ if ((*factors = (GLint *) malloc(sizeof(GLint) * cnt))
+ == NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ u_steps = nobj->u_step;
+ for (i = 0; i < cnt; i++)
+ (*factors)[i] = u_steps;
+ return GLU_NO_ERROR;
+}
- set_sampling_and_culling(nobj);
- tolerance = nobj->parametric_tolerance;
- cnt /= order;
- if((*factors=(GLint *)malloc(sizeof(GLint)*cnt))
- ==NULL)
- {
- revert_sampling_and_culling(nobj);
- return GLU_OUT_OF_MEMORY;
- }
- u_steps = nobj->u_step;
- for(i=0; i<cnt; i++)
- {
- (*factors)[i] = calc_parametric_factor(ctrl,order,0,
- dim,tolerance,dim);
- }
- revert_sampling_and_culling(nobj);
- return GLU_NO_ERROR;
+static GLenum
+glu_do_sampling_param_2D(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt,
+ GLint order, GLint dim, GLint ** factors)
+{
+ GLint i;
+ GLint u_steps;
+ GLfloat tolerance;
+
+ set_sampling_and_culling(nobj);
+ tolerance = nobj->parametric_tolerance;
+ cnt /= order;
+ if ((*factors = (GLint *) malloc(sizeof(GLint) * cnt))
+ == NULL) {
+ revert_sampling_and_culling(nobj);
+ return GLU_OUT_OF_MEMORY;
+ }
+ u_steps = nobj->u_step;
+ for (i = 0; i < cnt; i++) {
+ (*factors)[i] = calc_parametric_factor(ctrl, order, 0,
+ dim, tolerance, dim);
+
+ }
+ revert_sampling_and_culling(nobj);
+ return GLU_NO_ERROR;
}
GLenum
-glu_do_sampling_crv( GLUnurbsObj *nobj, GLfloat *ctrl, GLint cnt, GLint order,
- GLint dim, GLint **factors)
+glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * ctrl, GLint cnt,
+ GLint order, GLint dim, GLint ** factors)
{
- GLenum err;
-
- *factors=NULL;
- switch(nobj->sampling_method)
- {
- case GLU_PATH_LENGTH:
- if((err=glu_do_sampling_2D(nobj,ctrl,cnt,order,dim,factors))!=
- GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- break;
- case GLU_DOMAIN_DISTANCE:
- if((err=glu_do_sampling_u(nobj,ctrl,cnt,order,dim,factors))!=
- GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- break;
- case GLU_PARAMETRIC_ERROR:
- if((err=glu_do_sampling_param_2D(nobj,ctrl,cnt,order,dim,factors))!=
- GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- break;
- default:
- abort();
- }
-
- return GLU_NO_ERROR;
+ GLenum err;
+
+ *factors = NULL;
+ switch (nobj->sampling_method) {
+ case GLU_PATH_LENGTH:
+ if ((err = glu_do_sampling_2D(nobj, ctrl, cnt, order, dim, factors)) !=
+ GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ break;
+ case GLU_DOMAIN_DISTANCE:
+ if ((err = glu_do_sampling_u(nobj, ctrl, cnt, order, dim, factors)) !=
+ GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ break;
+ case GLU_PARAMETRIC_ERROR:
+ if (
+ (err =
+ glu_do_sampling_param_2D(nobj, ctrl, cnt, order, dim,
+ factors)) != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ break;
+ default:
+ abort();
+ }
+
+ return GLU_NO_ERROR;
}
/* TODO - i don't like this culling - this one just tests if at least one */
/* should be included in the fnctions for efficiency reasons */
static GLboolean
-point_in_viewport(GLfloat *pt, GLint dim)
+point_in_viewport(GLfloat * pt, GLint dim)
{
- GLdouble model[16],proj[16];
- GLint viewport[4];
- GLdouble x,y,z,w,winx,winy,winz;
-
- glGetDoublev(GL_MODELVIEW_MATRIX,model);
- glGetDoublev(GL_PROJECTION_MATRIX,proj);
- glGetIntegerv(GL_VIEWPORT,viewport);
- if(dim==3)
- {
- x=(GLdouble)pt[0];
- y=(GLdouble)pt[1];
- z=(GLdouble)pt[2];
- gluProject(x,y,z,model,proj,viewport,&winx,&winy,&winz);
- }
- else
- {
- w=(GLdouble)pt[3];
- x=(GLdouble)pt[0]/w;
- y=(GLdouble)pt[1]/w;
- z=(GLdouble)pt[2]/w;
- gluProject(x,y,z,model,proj,viewport,&winx,&winy,&winz);
- }
- if((GLint)winx >= viewport[0] && (GLint)winx < viewport[2] &&
- (GLint)winy >= viewport[1] && (GLint)winy < viewport[3])
- return GL_TRUE;
- return GL_FALSE;
+ GLdouble model[16], proj[16];
+ GLint viewport[4];
+ GLdouble x, y, z, w, winx, winy, winz;
+
+ glGetDoublev(GL_MODELVIEW_MATRIX, model);
+ glGetDoublev(GL_PROJECTION_MATRIX, proj);
+ glGetIntegerv(GL_VIEWPORT, viewport);
+ if (dim == 3) {
+ x = (GLdouble) pt[0];
+ y = (GLdouble) pt[1];
+ z = (GLdouble) pt[2];
+ gluProject(x, y, z, model, proj, viewport, &winx, &winy, &winz);
+ }
+ else {
+ w = (GLdouble) pt[3];
+ x = (GLdouble) pt[0] / w;
+ y = (GLdouble) pt[1] / w;
+ z = (GLdouble) pt[2] / w;
+ gluProject(x, y, z, model, proj, viewport, &winx, &winy, &winz);
+ }
+ if ((GLint) winx >= viewport[0] && (GLint) winx < viewport[2] &&
+ (GLint) winy >= viewport[1] && (GLint) winy < viewport[3])
+ return GL_TRUE;
+ return GL_FALSE;
}
GLboolean
-fine_culling_test_3D(GLUnurbsObj *nobj,GLfloat *pts,GLint s_cnt,GLint t_cnt,
- GLint s_stride,GLint t_stride, GLint dim)
+fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * pts, GLint s_cnt,
+ GLint t_cnt, GLint s_stride, GLint t_stride, GLint dim)
{
- GLint i,j;
-
- if(nobj->culling==GL_FALSE)
- return GL_FALSE;
- set_sampling_and_culling(nobj);
-
- if(dim==3)
- {
- for(i=0;i<s_cnt;i++)
- for(j=0;j<t_cnt;j++)
- if(point_in_viewport(pts+i*s_stride+j*t_stride,dim))
- {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- else
- {
- for(i=0;i<s_cnt;i++)
- for(j=0;j<t_cnt;j++)
- if(point_in_viewport(pts+i*s_stride+j*t_stride,dim))
- {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- revert_sampling_and_culling(nobj);
- return GL_TRUE;
+ GLint i, j;
+
+ if (nobj->culling == GL_FALSE)
+ return GL_FALSE;
+ set_sampling_and_culling(nobj);
+
+ if (dim == 3) {
+ for (i = 0; i < s_cnt; i++)
+ for (j = 0; j < t_cnt; j++)
+ if (point_in_viewport(pts + i * s_stride + j * t_stride, dim)) {
+ revert_sampling_and_culling(nobj);
+ return GL_FALSE;
+ }
+ }
+ else {
+ for (i = 0; i < s_cnt; i++)
+ for (j = 0; j < t_cnt; j++)
+ if (point_in_viewport(pts + i * s_stride + j * t_stride, dim)) {
+ revert_sampling_and_culling(nobj);
+ return GL_FALSE;
+ }
+ }
+ revert_sampling_and_culling(nobj);
+ return GL_TRUE;
}
/*GLboolean
}*/
GLboolean
-fine_culling_test_2D(GLUnurbsObj *nobj,GLfloat *pts,GLint cnt,
- GLint stride, GLint dim)
+fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * pts, GLint cnt,
+ GLint stride, GLint dim)
{
- GLint i;
-
- if(nobj->culling==GL_FALSE)
- return GL_FALSE;
- set_sampling_and_culling(nobj);
-
- if(dim==3)
- {
- for(i=0;i<cnt;i++)
- if(point_in_viewport(pts+i*stride,dim))
- {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- else
- {
- for(i=0;i<cnt;i++)
- if(point_in_viewport(pts+i*stride,dim))
- {
- revert_sampling_and_culling(nobj);
- return GL_FALSE;
- }
- }
- revert_sampling_and_culling(nobj);
- return GL_TRUE;
+ GLint i;
+
+ if (nobj->culling == GL_FALSE)
+ return GL_FALSE;
+ set_sampling_and_culling(nobj);
+
+ if (dim == 3) {
+ for (i = 0; i < cnt; i++)
+ if (point_in_viewport(pts + i * stride, dim)) {
+ revert_sampling_and_culling(nobj);
+ return GL_FALSE;
+ }
+ }
+ else {
+ for (i = 0; i < cnt; i++)
+ if (point_in_viewport(pts + i * stride, dim)) {
+ revert_sampling_and_culling(nobj);
+ return GL_FALSE;
+ }
+ }
+ revert_sampling_and_culling(nobj);
+ return GL_TRUE;
}
/*GLboolean
revert_sampling_and_culling(nobj);
return (GLboolean)(visible_cnt==0);
}*/
-
--- /dev/null
+/* $Id: polytest.c,v 1.3 2000/07/11 14:11:04 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <math.h>
+#include <stdlib.h>
+#include "gluP.h"
+#include "tess.h"
+#endif
+
+
+
+static GLenum store_polygon_as_contour(GLUtriangulatorObj *);
+static void free_current_polygon(tess_polygon *);
+static void prepare_projection_info(GLUtriangulatorObj *);
+static GLdouble twice_the_polygon_area(tess_vertex *, tess_vertex *);
+static GLenum verify_edge_vertex_intersections(GLUtriangulatorObj *);
+void tess_find_contour_hierarchies(GLUtriangulatorObj *);
+static GLenum test_for_overlapping_contours(GLUtriangulatorObj *);
+static GLenum contours_overlap(tess_contour *, tess_polygon *);
+static GLenum is_contour_contained_in(tess_contour *, tess_contour *);
+static void add_new_exterior(GLUtriangulatorObj *, tess_contour *);
+static void add_new_interior(GLUtriangulatorObj *, tess_contour *,
+ tess_contour *);
+static void add_interior_with_hierarchy_check(GLUtriangulatorObj *,
+ tess_contour *, tess_contour *);
+static void reverse_hierarchy_and_add_exterior(GLUtriangulatorObj *,
+ tess_contour *,
+ tess_contour *);
+static GLboolean point_in_polygon(tess_contour *, GLdouble, GLdouble);
+static void shift_interior_to_exterior(GLUtriangulatorObj *, tess_contour *);
+static void add_exterior_with_check(GLUtriangulatorObj *, tess_contour *,
+ tess_contour *);
+static GLenum cut_out_hole(GLUtriangulatorObj *, tess_contour *,
+ tess_contour *);
+static GLenum merge_hole_with_contour(GLUtriangulatorObj *,
+ tess_contour *, tess_contour *,
+ tess_vertex *, tess_vertex *);
+
+static GLenum
+find_normal(GLUtriangulatorObj * tobj)
+{
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_vertex *va, *vb, *vc;
+ GLdouble A, B, C;
+ GLdouble A0, A1, A2, B0, B1, B2;
+
+ va = polygon->vertices;
+ vb = va->next;
+ A0 = vb->location[0] - va->location[0];
+ A1 = vb->location[1] - va->location[1];
+ A2 = vb->location[2] - va->location[2];
+ for (vc = vb->next; vc != va; vc = vc->next) {
+ B0 = vc->location[0] - va->location[0];
+ B1 = vc->location[1] - va->location[1];
+ B2 = vc->location[2] - va->location[2];
+ A = A1 * B2 - A2 * B1;
+ B = A2 * B0 - A0 * B2;
+ C = A0 * B1 - A1 * B0;
+ if (fabs(A) > EPSILON || fabs(B) > EPSILON || fabs(C) > EPSILON) {
+ polygon->A = A;
+ polygon->B = B;
+ polygon->C = C;
+ polygon->D =
+ -A * va->location[0] - B * va->location[1] - C * va->location[2];
+ return GLU_NO_ERROR;
+ }
+ }
+ tess_call_user_error(tobj, GLU_TESS_ERROR7);
+ return GLU_ERROR;
+}
+
+void
+tess_test_polygon(GLUtriangulatorObj * tobj)
+{
+ tess_polygon *polygon = tobj->current_polygon;
+
+ /* any vertices defined? */
+ if (polygon->vertex_cnt < 3) {
+ free_current_polygon(polygon);
+ return;
+ }
+ /* wrap pointers */
+ polygon->last_vertex->next = polygon->vertices;
+ polygon->vertices->previous = polygon->last_vertex;
+ /* determine the normal */
+ if (find_normal(tobj) == GLU_ERROR)
+ return;
+ /* compare the normals of previously defined contours and this one */
+ /* first contour define ? */
+ if (tobj->contours == NULL) {
+ tobj->A = polygon->A;
+ tobj->B = polygon->B;
+ tobj->C = polygon->C;
+ tobj->D = polygon->D;
+ /* determine the best projection to use */
+ if (fabs(polygon->A) > fabs(polygon->B))
+ if (fabs(polygon->A) > fabs(polygon->C))
+ tobj->projection = OYZ;
+ else
+ tobj->projection = OXY;
+ else if (fabs(polygon->B) > fabs(polygon->C))
+ tobj->projection = OXZ;
+ else
+ tobj->projection = OXY;
+ }
+ else {
+ GLdouble a[3], b[3];
+ tess_vertex *vertex = polygon->vertices;
+
+ a[0] = tobj->A;
+ a[1] = tobj->B;
+ a[2] = tobj->C;
+ b[0] = polygon->A;
+ b[1] = polygon->B;
+ b[2] = polygon->C;
+
+ /* compare the normals */
+ if (fabs(a[1] * b[2] - a[2] * b[1]) > EPSILON ||
+ fabs(a[2] * b[0] - a[0] * b[2]) > EPSILON ||
+ fabs(a[0] * b[1] - a[1] * b[0]) > EPSILON) {
+ /* not coplanar */
+ tess_call_user_error(tobj, GLU_TESS_ERROR9);
+ return;
+ }
+ /* the normals are parallel - test for plane equation */
+ if (fabs(a[0] * vertex->location[0] + a[1] * vertex->location[1] +
+ a[2] * vertex->location[2] + tobj->D) > EPSILON) {
+ /* not the same plane */
+ tess_call_user_error(tobj, GLU_TESS_ERROR9);
+ return;
+ }
+ }
+ prepare_projection_info(tobj);
+ if (verify_edge_vertex_intersections(tobj) == GLU_ERROR)
+ return;
+ if (test_for_overlapping_contours(tobj) == GLU_ERROR)
+ return;
+ if (store_polygon_as_contour(tobj) == GLU_ERROR)
+ return;
+}
+
+static GLenum
+test_for_overlapping_contours(GLUtriangulatorObj * tobj)
+{
+ tess_contour *contour;
+ tess_polygon *polygon;
+
+ polygon = tobj->current_polygon;
+ for (contour = tobj->contours; contour != NULL; contour = contour->next)
+ if (contours_overlap(contour, polygon) != GLU_NO_ERROR) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR5);
+ return GLU_ERROR;
+ }
+ return GLU_NO_ERROR;
+}
+
+static GLenum
+store_polygon_as_contour(GLUtriangulatorObj * tobj)
+{
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_contour *contour = tobj->contours;
+
+ /* the first contour defined */
+ if (contour == NULL) {
+ if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ free_current_polygon(polygon);
+ return GLU_ERROR;
+ }
+ tobj->contours = tobj->last_contour = contour;
+ contour->next = contour->previous = NULL;
+ }
+ else {
+ if ((contour = (tess_contour *) malloc(sizeof(tess_contour))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ free_current_polygon(polygon);
+ return GLU_ERROR;
+ }
+ contour->previous = tobj->last_contour;
+ tobj->last_contour->next = contour;
+ tobj->last_contour = contour;
+ contour->next = NULL;
+ }
+ /* mark all vertices in new contour as not special */
+ /* and all are boundary edges */
+ {
+ tess_vertex *vertex;
+ GLuint vertex_cnt, i;
+
+ for (vertex = polygon->vertices, i = 0, vertex_cnt =
+ polygon->vertex_cnt; i < vertex_cnt; vertex = vertex->next, i++) {
+ vertex->shadow_vertex = NULL;
+ vertex->edge_flag = GL_TRUE;
+ }
+ }
+ contour->vertex_cnt = polygon->vertex_cnt;
+ contour->area = polygon->area;
+ contour->orientation = polygon->orientation;
+ contour->type = GLU_UNKNOWN;
+ contour->vertices = polygon->vertices;
+ contour->last_vertex = polygon->last_vertex;
+ polygon->vertices = polygon->last_vertex = NULL;
+ polygon->vertex_cnt = 0;
+ ++(tobj->contour_cnt);
+ return GLU_NO_ERROR;
+}
+
+static void
+free_current_polygon(tess_polygon * polygon)
+{
+ tess_vertex *vertex, *vertex_tmp;
+ GLuint i;
+
+ /* free current_polygon structures */
+ for (vertex = polygon->vertices, i = 0; i < polygon->vertex_cnt; i++) {
+ vertex_tmp = vertex->next;
+ free(vertex);
+ vertex = vertex_tmp;
+ }
+ polygon->vertices = polygon->last_vertex = NULL;
+ polygon->vertex_cnt = 0;
+}
+
+static void
+prepare_projection_info(GLUtriangulatorObj * tobj)
+{
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_vertex *vertex, *last_vertex_ptr;
+ GLdouble area;
+
+ last_vertex_ptr = polygon->last_vertex;
+ switch (tobj->projection) {
+ case OXY:
+ for (vertex = polygon->vertices; vertex != last_vertex_ptr;
+ vertex = vertex->next) {
+ vertex->x = vertex->location[0];
+ vertex->y = vertex->location[1];
+ }
+ last_vertex_ptr->x = last_vertex_ptr->location[0];
+ last_vertex_ptr->y = last_vertex_ptr->location[1];
+ break;
+ case OXZ:
+ for (vertex = polygon->vertices; vertex != last_vertex_ptr;
+ vertex = vertex->next) {
+ vertex->x = vertex->location[0];
+ vertex->y = vertex->location[2];
+ }
+ last_vertex_ptr->x = last_vertex_ptr->location[0];
+ last_vertex_ptr->y = last_vertex_ptr->location[2];
+ break;
+ case OYZ:
+ for (vertex = polygon->vertices; vertex != last_vertex_ptr;
+ vertex = vertex->next) {
+ vertex->x = vertex->location[1];
+ vertex->y = vertex->location[2];
+ }
+ last_vertex_ptr->x = last_vertex_ptr->location[1];
+ last_vertex_ptr->y = last_vertex_ptr->location[2];
+ break;
+ }
+ area = twice_the_polygon_area(polygon->vertices, polygon->last_vertex);
+ if (area >= 0.0) {
+ polygon->orientation = GLU_CCW;
+ polygon->area = area;
+ }
+ else {
+ polygon->orientation = GLU_CW;
+ polygon->area = -area;
+ }
+}
+
+static GLdouble
+twice_the_polygon_area(tess_vertex * vertex, tess_vertex * last_vertex)
+{
+ tess_vertex *next;
+ GLdouble area, x, y;
+
+ area = 0.0;
+ x = vertex->x;
+ y = vertex->y;
+ vertex = vertex->next;
+ for (; vertex != last_vertex; vertex = vertex->next) {
+ next = vertex->next;
+ area +=
+ (vertex->x - x) * (next->y - y) - (vertex->y - y) * (next->x - x);
+ }
+ return area;
+}
+
+/* test if edges ab and cd intersect */
+/* if not return GLU_NO_ERROR, else if cross return GLU_TESS_ERROR8, */
+/* else if adjacent return GLU_TESS_ERROR4 */
+static GLenum
+edge_edge_intersect(tess_vertex * a,
+ tess_vertex * b, tess_vertex * c, tess_vertex * d)
+{
+ GLdouble denom, r, s;
+ GLdouble xba, ydc, yba, xdc, yac, xac;
+
+ xba = b->x - a->x;
+ yba = b->y - a->y;
+ xdc = d->x - c->x;
+ ydc = d->y - c->y;
+ xac = a->x - c->x;
+ yac = a->y - c->y;
+ denom = xba * ydc - yba * xdc;
+ r = yac * xdc - xac * ydc;
+ /* parallel? */
+ if (fabs(denom) < EPSILON) {
+ if (fabs(r) < EPSILON) {
+ /* colinear */
+ if (fabs(xba) < EPSILON) {
+ /* compare the Y coordinate */
+ if (yba > 0.0) {
+ if (
+ (fabs(a->y - c->y) < EPSILON
+ && fabs(c->y - b->y) < EPSILON)
+ || (fabs(a->y - d->y) < EPSILON
+ && fabs(d->y - b->y) <
+ EPSILON)) return GLU_TESS_ERROR4;
+
+ }
+ else {
+ if (
+ (fabs(b->y - c->y) < EPSILON
+ && fabs(c->y - a->y) < EPSILON)
+ || (fabs(b->y - d->y) < EPSILON
+ && fabs(d->y - a->y) <
+ EPSILON)) return GLU_TESS_ERROR4;
+ }
+ }
+ else {
+ /* compare the X coordinate */
+ if (xba > 0.0) {
+ if (
+ (fabs(a->x - c->x) < EPSILON
+ && fabs(c->x - b->x) < EPSILON)
+ || (fabs(a->x - d->x) < EPSILON
+ && fabs(d->x - b->x) <
+ EPSILON)) return GLU_TESS_ERROR4;
+ }
+ else {
+ if (
+ (fabs(b->x - c->x) < EPSILON
+ && fabs(c->x - a->x) < EPSILON)
+ || (fabs(b->x - d->x) < EPSILON
+ && fabs(d->x - a->x) <
+ EPSILON)) return GLU_TESS_ERROR4;
+ }
+ }
+ }
+ return GLU_NO_ERROR;
+ }
+ r /= denom;
+ s = (yac * xba - xac * yba) / denom;
+ /* test if one vertex lies on other edge */
+ if (((fabs(r) < EPSILON || (r < 1.0 + EPSILON && r > 1.0 - EPSILON)) &&
+ s > -EPSILON && s < 1.0 + EPSILON) ||
+ ((fabs(s) < EPSILON || (s < 1.0 + EPSILON && s > 1.0 - EPSILON)) &&
+ r > -EPSILON && r < 1.0 + EPSILON)) {
+ return GLU_TESS_ERROR4;
+ }
+ /* test for crossing */
+ if (r > -EPSILON && r < 1.0 + EPSILON && s > -EPSILON && s < 1.0 + EPSILON) {
+ return GLU_TESS_ERROR8;
+ }
+ return GLU_NO_ERROR;
+}
+
+static GLenum
+verify_edge_vertex_intersections(GLUtriangulatorObj * tobj)
+{
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_vertex *vertex1, *last_vertex, *vertex2;
+ GLenum test;
+
+ last_vertex = polygon->last_vertex;
+ vertex1 = last_vertex;
+ for (vertex2 = vertex1->next->next;
+ vertex2->next != last_vertex; vertex2 = vertex2->next) {
+ test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
+ vertex2->next);
+ if (test != GLU_NO_ERROR) {
+ tess_call_user_error(tobj, test);
+ return GLU_ERROR;
+ }
+ }
+ for (vertex1 = polygon->vertices;
+ vertex1->next->next != last_vertex; vertex1 = vertex1->next) {
+ for (vertex2 = vertex1->next->next;
+ vertex2 != last_vertex; vertex2 = vertex2->next) {
+ test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
+ vertex2->next);
+ if (test != GLU_NO_ERROR) {
+ tess_call_user_error(tobj, test);
+ return GLU_ERROR;
+ }
+ }
+ }
+ return GLU_NO_ERROR;
+}
+
+static int
+#ifdef WIN32
+ __cdecl
+#endif
+area_compare(const void *a, const void *b)
+{
+ GLdouble area1, area2;
+
+ area1 = (*((tess_contour **) a))->area;
+ area2 = (*((tess_contour **) b))->area;
+ if (area1 < area2)
+ return 1;
+ if (area1 > area2)
+ return -1;
+ return 0;
+}
+
+void
+tess_find_contour_hierarchies(GLUtriangulatorObj * tobj)
+{
+ tess_contour **contours; /* dinamic array of pointers */
+ tess_contour *tmp_contour_ptr = tobj->contours;
+ GLuint cnt, i;
+ GLenum result;
+ GLboolean hierarchy_changed;
+
+ /* any contours? */
+ if (tobj->contour_cnt < 2) {
+ tobj->contours->type = GLU_EXTERIOR;
+ return;
+ }
+ if ((contours = (tess_contour **)
+ malloc(sizeof(tess_contour *) * (tobj->contour_cnt))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ for (tmp_contour_ptr = tobj->contours, cnt = 0;
+ tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next)
+ contours[cnt++] = tmp_contour_ptr;
+ /* now sort the contours in decreasing area size order */
+ qsort((void *) contours, (size_t) cnt, (size_t) sizeof(tess_contour *),
+ area_compare);
+ /* we leave just the first contour - remove others from list */
+ tobj->contours = contours[0];
+ tobj->contours->next = tobj->contours->previous = NULL;
+ tobj->last_contour = tobj->contours;
+ tobj->contour_cnt = 1;
+ /* first contour is the one with greatest area */
+ /* must be EXTERIOR */
+ tobj->contours->type = GLU_EXTERIOR;
+ tmp_contour_ptr = tobj->contours;
+ /* now we play! */
+ for (i = 1; i < cnt; i++) {
+ hierarchy_changed = GL_FALSE;
+ for (tmp_contour_ptr = tobj->contours;
+ tmp_contour_ptr != NULL; tmp_contour_ptr = tmp_contour_ptr->next) {
+ if (tmp_contour_ptr->type == GLU_EXTERIOR) {
+ /* check if contour completely contained in EXTERIOR */
+ result = is_contour_contained_in(tmp_contour_ptr, contours[i]);
+ switch (result) {
+ case GLU_INTERIOR:
+ /* now we have to check if contour is inside interiors */
+ /* or not */
+ /* any interiors? */
+ if (tmp_contour_ptr->next != NULL &&
+ tmp_contour_ptr->next->type == GLU_INTERIOR) {
+ /* for all interior, check if inside any of them */
+ /* if not inside any of interiors, its another */
+ /* interior */
+ /* or it may contain some interiors, then change */
+ /* the contained interiors to exterior ones */
+ add_interior_with_hierarchy_check(tobj,
+ tmp_contour_ptr,
+ contours[i]);
+ }
+ else {
+ /* not in interior, add as new interior contour */
+ add_new_interior(tobj, tmp_contour_ptr, contours[i]);
+ }
+ hierarchy_changed = GL_TRUE;
+ break;
+ case GLU_EXTERIOR:
+ /* ooops, the marked as EXTERIOR (contours[i]) is */
+ /* actually an interior of tmp_contour_ptr */
+ /* reverse the local hierarchy */
+ reverse_hierarchy_and_add_exterior(tobj, tmp_contour_ptr,
+ contours[i]);
+ hierarchy_changed = GL_TRUE;
+ break;
+ case GLU_NO_ERROR:
+ break;
+ default:
+ abort();
+ }
+ }
+ if (hierarchy_changed)
+ break; /* break from for loop */
+ }
+ if (hierarchy_changed == GL_FALSE) {
+ /* disjoint with all contours, add to contour list */
+ add_new_exterior(tobj, contours[i]);
+ }
+ }
+ free(contours);
+}
+
+/* returns GLU_INTERIOR if inner is completey enclosed within outer */
+/* returns GLU_EXTERIOR if outer is completely enclosed within inner */
+/* returns GLU_NO_ERROR if contours are disjoint */
+static GLenum
+is_contour_contained_in(tess_contour * outer, tess_contour * inner)
+{
+ GLenum relation_flag;
+
+ /* set relation_flag to relation of containment of first inner vertex */
+ /* regarding outer contour */
+ if (point_in_polygon(outer, inner->vertices->x, inner->vertices->y))
+ relation_flag = GLU_INTERIOR;
+ else
+ relation_flag = GLU_EXTERIOR;
+ if (relation_flag == GLU_INTERIOR)
+ return GLU_INTERIOR;
+ if (point_in_polygon(inner, outer->vertices->x, outer->vertices->y))
+ return GLU_EXTERIOR;
+ return GLU_NO_ERROR;
+}
+
+static GLboolean
+point_in_polygon(tess_contour * contour, GLdouble x, GLdouble y)
+{
+ tess_vertex *v1, *v2;
+ GLuint i, vertex_cnt;
+ GLdouble xp1, yp1, xp2, yp2;
+ GLboolean tst;
+
+ tst = GL_FALSE;
+ v1 = contour->vertices;
+ v2 = contour->vertices->previous;
+ for (i = 0, vertex_cnt = contour->vertex_cnt; i < vertex_cnt; i++) {
+ xp1 = v1->x;
+ yp1 = v1->y;
+ xp2 = v2->x;
+ yp2 = v2->y;
+ if ((((yp1 <= y) && (y < yp2)) || ((yp2 <= y) && (y < yp1))) &&
+ (x < (xp2 - xp1) * (y - yp1) / (yp2 - yp1) + xp1))
+ tst = (tst == GL_FALSE ? GL_TRUE : GL_FALSE);
+ v2 = v1;
+ v1 = v1->next;
+ }
+ return tst;
+}
+
+static GLenum
+contours_overlap(tess_contour * contour, tess_polygon * polygon)
+{
+ tess_vertex *vertex1, *vertex2;
+ GLuint vertex1_cnt, vertex2_cnt, i, j;
+ GLenum test;
+
+ vertex1 = contour->vertices;
+ vertex2 = polygon->vertices;
+ vertex1_cnt = contour->vertex_cnt;
+ vertex2_cnt = polygon->vertex_cnt;
+ for (i = 0; i < vertex1_cnt; vertex1 = vertex1->next, i++) {
+ for (j = 0; j < vertex2_cnt; vertex2 = vertex2->next, j++)
+ if ((test = edge_edge_intersect(vertex1, vertex1->next, vertex2,
+ vertex2->next)) != GLU_NO_ERROR)
+ return test;
+ }
+ return GLU_NO_ERROR;
+}
+
+static void
+add_new_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ contour->type = GLU_EXTERIOR;
+ contour->next = NULL;
+ contour->previous = tobj->last_contour;
+ tobj->last_contour->next = contour;
+ tobj->last_contour = contour;
+}
+
+static void
+add_new_interior(GLUtriangulatorObj * tobj,
+ tess_contour * outer, tess_contour * contour)
+{
+ contour->type = GLU_INTERIOR;
+ contour->next = outer->next;
+ contour->previous = outer;
+ if (outer->next != NULL)
+ outer->next->previous = contour;
+ outer->next = contour;
+ if (tobj->last_contour == outer)
+ tobj->last_contour = contour;
+}
+
+static void
+add_interior_with_hierarchy_check(GLUtriangulatorObj * tobj,
+ tess_contour * outer,
+ tess_contour * contour)
+{
+ tess_contour *ptr;
+
+ /* for all interiors of outer check if they are interior of contour */
+ /* if so, change that interior to exterior and move it of of the */
+ /* interior sequence */
+ if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
+ GLenum test;
+
+ for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
+ ptr = ptr->next) {
+ test = is_contour_contained_in(ptr, contour);
+ switch (test) {
+ case GLU_INTERIOR:
+ /* contour is contained in one of the interiors */
+ /* check if possibly contained in other exteriors */
+ /* move ptr to first EXTERIOR */
+ for (; ptr != NULL && ptr->type == GLU_INTERIOR; ptr = ptr->next);
+ if (ptr == NULL)
+ /* another exterior */
+ add_new_exterior(tobj, contour);
+ else
+ add_exterior_with_check(tobj, ptr, contour);
+ return;
+ case GLU_EXTERIOR:
+ /* one of the interiors is contained in the contour */
+ /* change it to EXTERIOR, and shift it away from the */
+ /* interior sequence */
+ shift_interior_to_exterior(tobj, ptr);
+ break;
+ case GLU_NO_ERROR:
+ /* disjoint */
+ break;
+ default:
+ abort();
+ }
+ }
+ }
+ /* add contour to the interior sequence */
+ add_new_interior(tobj, outer, contour);
+}
+
+static void
+reverse_hierarchy_and_add_exterior(GLUtriangulatorObj * tobj,
+ tess_contour * outer,
+ tess_contour * contour)
+{
+ tess_contour *ptr;
+
+ /* reverse INTERIORS to EXTERIORS */
+ /* any INTERIORS? */
+ if (outer->next != NULL && outer->next->type == GLU_INTERIOR)
+ for (ptr = outer->next; ptr != NULL && ptr->type == GLU_INTERIOR;
+ ptr = ptr->next) ptr->type = GLU_EXTERIOR;
+ /* the outer now becomes inner */
+ outer->type = GLU_INTERIOR;
+ /* contour is the EXTERIOR */
+ contour->next = outer;
+ if (tobj->contours == outer) {
+ /* first contour beeing reversed */
+ contour->previous = NULL;
+ tobj->contours = contour;
+ }
+ else {
+ outer->previous->next = contour;
+ contour->previous = outer->previous;
+ }
+ outer->previous = contour;
+}
+
+static void
+shift_interior_to_exterior(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ contour->previous->next = contour->next;
+ if (contour->next != NULL)
+ contour->next->previous = contour->previous;
+ else
+ tobj->last_contour = contour->previous;
+}
+
+static void
+add_exterior_with_check(GLUtriangulatorObj * tobj,
+ tess_contour * outer, tess_contour * contour)
+{
+ GLenum test;
+
+ /* this contour might be interior to further exteriors - check */
+ /* if not, just add as a new exterior */
+ for (; outer != NULL && outer->type == GLU_EXTERIOR; outer = outer->next) {
+ test = is_contour_contained_in(outer, contour);
+ switch (test) {
+ case GLU_INTERIOR:
+ /* now we have to check if contour is inside interiors */
+ /* or not */
+ /* any interiors? */
+ if (outer->next != NULL && outer->next->type == GLU_INTERIOR) {
+ /* for all interior, check if inside any of them */
+ /* if not inside any of interiors, its another */
+ /* interior */
+ /* or it may contain some interiors, then change */
+ /* the contained interiors to exterior ones */
+ add_interior_with_hierarchy_check(tobj, outer, contour);
+ }
+ else {
+ /* not in interior, add as new interior contour */
+ add_new_interior(tobj, outer, contour);
+ }
+ return;
+ case GLU_NO_ERROR:
+ /* disjoint */
+ break;
+ default:
+ abort();
+ }
+ }
+ /* add contour to the exterior sequence */
+ add_new_exterior(tobj, contour);
+}
+
+void
+tess_handle_holes(GLUtriangulatorObj * tobj)
+{
+ tess_contour *contour, *hole;
+ GLenum exterior_orientation;
+
+ /* verify hole orientation */
+ for (contour = tobj->contours; contour != NULL;) {
+ exterior_orientation = contour->orientation;
+ for (contour = contour->next;
+ contour != NULL && contour->type == GLU_INTERIOR;
+ contour = contour->next) {
+ if (contour->orientation == exterior_orientation) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR5);
+ return;
+ }
+ }
+ }
+ /* now cut-out holes */
+ for (contour = tobj->contours; contour != NULL;) {
+ hole = contour->next;
+ while (hole != NULL && hole->type == GLU_INTERIOR) {
+ if (cut_out_hole(tobj, contour, hole) == GLU_ERROR)
+ return;
+ hole = contour->next;
+ }
+ contour = contour->next;
+ }
+}
+
+static GLenum
+cut_out_hole(GLUtriangulatorObj * tobj,
+ tess_contour * contour, tess_contour * hole)
+{
+ tess_contour *tmp_hole;
+ tess_vertex *v1, *v2, *tmp_vertex;
+ GLuint vertex1_cnt, vertex2_cnt, tmp_vertex_cnt;
+ GLuint i, j, k;
+ GLenum test;
+
+ /* find an edge connecting contour and hole not intersecting any other */
+ /* edge belonging to either the contour or any of the other holes */
+ for (v1 = contour->vertices, vertex1_cnt = contour->vertex_cnt, i = 0;
+ i < vertex1_cnt; i++, v1 = v1->next) {
+ for (v2 = hole->vertices, vertex2_cnt = hole->vertex_cnt, j = 0;
+ j < vertex2_cnt; j++, v2 = v2->next) {
+ /* does edge (v1,v2) intersect any edge of contour */
+ for (tmp_vertex = contour->vertices, tmp_vertex_cnt =
+ contour->vertex_cnt, k = 0; k < tmp_vertex_cnt;
+ tmp_vertex = tmp_vertex->next, k++) {
+ /* skip edge tests for edges directly connected */
+ if (v1 == tmp_vertex || v1 == tmp_vertex->next)
+ continue;
+ test = edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
+ if (test != GLU_NO_ERROR)
+ break;
+ }
+ if (test == GLU_NO_ERROR) {
+ /* does edge (v1,v2) intersect any edge of hole */
+ for (tmp_vertex = hole->vertices,
+ tmp_vertex_cnt = hole->vertex_cnt, k = 0;
+ k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
+ /* skip edge tests for edges directly connected */
+ if (v2 == tmp_vertex || v2 == tmp_vertex->next)
+ continue;
+ test =
+ edge_edge_intersect(v1, v2, tmp_vertex, tmp_vertex->next);
+ if (test != GLU_NO_ERROR)
+ break;
+ }
+ if (test == GLU_NO_ERROR) {
+ /* does edge (v1,v2) intersect any other hole? */
+ for (tmp_hole = hole->next;
+ tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
+ tmp_hole = tmp_hole->next) {
+ /* does edge (v1,v2) intersect any edge of hole */
+ for (tmp_vertex = tmp_hole->vertices,
+ tmp_vertex_cnt = tmp_hole->vertex_cnt, k = 0;
+ k < tmp_vertex_cnt; tmp_vertex = tmp_vertex->next, k++) {
+ test = edge_edge_intersect(v1, v2, tmp_vertex,
+ tmp_vertex->next);
+ if (test != GLU_NO_ERROR)
+ break;
+ }
+ if (test != GLU_NO_ERROR)
+ break;
+ }
+ }
+ }
+ if (test == GLU_NO_ERROR) {
+ /* edge (v1,v2) is good for eliminating the hole */
+ if (merge_hole_with_contour(tobj, contour, hole, v1, v2)
+ == GLU_NO_ERROR)
+ return GLU_NO_ERROR;
+ else
+ return GLU_ERROR;
+ }
+ }
+ }
+ /* other holes are blocking all possible connections of hole */
+ /* with contour, we shift this hole as the last hole and retry */
+ for (tmp_hole = hole;
+ tmp_hole != NULL && tmp_hole->type == GLU_INTERIOR;
+ tmp_hole = tmp_hole->next);
+ contour->next = hole->next;
+ hole->next->previous = contour;
+ if (tmp_hole == NULL) {
+ /* last EXTERIOR contour, shift hole as last contour */
+ hole->next = NULL;
+ hole->previous = tobj->last_contour;
+ tobj->last_contour->next = hole;
+ tobj->last_contour = hole;
+ }
+ else {
+ tmp_hole->previous->next = hole;
+ hole->previous = tmp_hole->previous;
+ tmp_hole->previous = hole;
+ hole->next = tmp_hole;
+ }
+ hole = contour->next;
+ /* try once again - recurse */
+ return cut_out_hole(tobj, contour, hole);
+}
+
+static GLenum
+merge_hole_with_contour(GLUtriangulatorObj * tobj,
+ tess_contour * contour,
+ tess_contour * hole,
+ tess_vertex * v1, tess_vertex * v2)
+{
+ tess_vertex *v1_new, *v2_new;
+
+ /* make copies of v1 and v2, place them respectively after their originals */
+ if ((v1_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if ((v2_new = (tess_vertex *) malloc(sizeof(tess_vertex))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ v1_new->edge_flag = GL_TRUE;
+ v1_new->data = v1->data;
+ v1_new->location[0] = v1->location[0];
+ v1_new->location[1] = v1->location[1];
+ v1_new->location[2] = v1->location[2];
+ v1_new->x = v1->x;
+ v1_new->y = v1->y;
+ v1_new->shadow_vertex = v1;
+ v1->shadow_vertex = v1_new;
+ v1_new->next = v1->next;
+ v1_new->previous = v1;
+ v1->next->previous = v1_new;
+ v1->next = v1_new;
+ v2_new->edge_flag = GL_TRUE;
+ v2_new->data = v2->data;
+ v2_new->location[0] = v2->location[0];
+ v2_new->location[1] = v2->location[1];
+ v2_new->location[2] = v2->location[2];
+ v2_new->x = v2->x;
+ v2_new->y = v2->y;
+ v2_new->shadow_vertex = v2;
+ v2->shadow_vertex = v2_new;
+ v2_new->next = v2->next;
+ v2_new->previous = v2;
+ v2->next->previous = v2_new;
+ v2->next = v2_new;
+ /* link together the two lists */
+ v1->next = v2_new;
+ v2_new->previous = v1;
+ v2->next = v1_new;
+ v1_new->previous = v2;
+ /* update the vertex count of the contour */
+ contour->vertex_cnt += hole->vertex_cnt + 2;
+ /* remove the INTERIOR contour */
+ contour->next = hole->next;
+ if (hole->next != NULL)
+ hole->next->previous = contour;
+ free(hole);
+ /* update tobj structure */
+ --(tobj->contour_cnt);
+ if (contour->last_vertex == v1)
+ contour->last_vertex = v1_new;
+ /* mark two vertices with edge_flag */
+ v2->edge_flag = GL_FALSE;
+ v1->edge_flag = GL_FALSE;
+ return GLU_NO_ERROR;
+}
-/* $Id: project.c,v 1.2 1999/09/14 00:10:31 brianp Exp $ */
+/* $Id: project.c,v 1.3 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
- * Copyright (C) 1995-1999 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*/
-/*
- * $Log: project.c,v $
- * Revision 1.2 1999/09/14 00:10:31 brianp
- * added gluUnProject4()
- *
- * Revision 1.1.1.1 1999/08/19 00:55:42 jtg
- * Imported sources
- *
- * Revision 1.7 1999/01/03 03:23:15 brianp
- * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump)
- *
- * Revision 1.6 1998/07/08 01:43:43 brianp
- * new version of invert_matrix() (also in src/matrix.c)
- *
- * Revision 1.5 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.4 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.3 1997/04/11 23:22:42 brianp
- * added divide by zero checks to gluProject() and gluUnproject()
- *
- * Revision 1.2 1997/01/29 19:05:29 brianp
- * faster invert_matrix() function from Stephane Rehel
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
#ifdef PC_HEADER
#include "all.h"
#else
* in - the 4x1 vector
* Output: out - the resulting 4x1 vector.
*/
-static void transform_point( GLdouble out[4], const GLdouble m[16],
- const GLdouble in[4] )
+static void
+transform_point(GLdouble out[4], const GLdouble m[16], const GLdouble in[4])
{
#define M(row,col) m[col*4+row]
- out[0] = M(0,0) * in[0] + M(0,1) * in[1] + M(0,2) * in[2] + M(0,3) * in[3];
- out[1] = M(1,0) * in[0] + M(1,1) * in[1] + M(1,2) * in[2] + M(1,3) * in[3];
- out[2] = M(2,0) * in[0] + M(2,1) * in[1] + M(2,2) * in[2] + M(2,3) * in[3];
- out[3] = M(3,0) * in[0] + M(3,1) * in[1] + M(3,2) * in[2] + M(3,3) * in[3];
+ out[0] =
+ M(0, 0) * in[0] + M(0, 1) * in[1] + M(0, 2) * in[2] + M(0, 3) * in[3];
+ out[1] =
+ M(1, 0) * in[0] + M(1, 1) * in[1] + M(1, 2) * in[2] + M(1, 3) * in[3];
+ out[2] =
+ M(2, 0) * in[0] + M(2, 1) * in[1] + M(2, 2) * in[2] + M(2, 3) * in[3];
+ out[3] =
+ M(3, 0) * in[0] + M(3, 1) * in[1] + M(3, 2) * in[2] + M(3, 3) * in[3];
#undef M
}
* Input: a, b - matrices to multiply
* Output: product - product of a and b
*/
-static void matmul( GLdouble *product, const GLdouble *a, const GLdouble *b )
+static void
+matmul(GLdouble * product, const GLdouble * a, const GLdouble * b)
{
/* This matmul was contributed by Thomas Malik */
GLdouble temp[16];
#define T(row,col) temp[(col<<2)+row]
/* i-te Zeile */
- for (i = 0; i < 4; i++)
- {
- T(i, 0) = A(i, 0) * B(0, 0) + A(i, 1) * B(1, 0) + A(i, 2) * B(2, 0) + A(i, 3) * B(3, 0);
- T(i, 1) = A(i, 0) * B(0, 1) + A(i, 1) * B(1, 1) + A(i, 2) * B(2, 1) + A(i, 3) * B(3, 1);
- T(i, 2) = A(i, 0) * B(0, 2) + A(i, 1) * B(1, 2) + A(i, 2) * B(2, 2) + A(i, 3) * B(3, 2);
- T(i, 3) = A(i, 0) * B(0, 3) + A(i, 1) * B(1, 3) + A(i, 2) * B(2, 3) + A(i, 3) * B(3, 3);
- }
+ for (i = 0; i < 4; i++) {
+ T(i, 0) =
+ A(i, 0) * B(0, 0) + A(i, 1) * B(1, 0) + A(i, 2) * B(2, 0) + A(i,
+ 3) *
+ B(3, 0);
+ T(i, 1) =
+ A(i, 0) * B(0, 1) + A(i, 1) * B(1, 1) + A(i, 2) * B(2, 1) + A(i,
+ 3) *
+ B(3, 1);
+ T(i, 2) =
+ A(i, 0) * B(0, 2) + A(i, 1) * B(1, 2) + A(i, 2) * B(2, 2) + A(i,
+ 3) *
+ B(3, 2);
+ T(i, 3) =
+ A(i, 0) * B(0, 3) + A(i, 1) * B(1, 3) + A(i, 2) * B(2, 3) + A(i,
+ 3) *
+ B(3, 3);
+ }
#undef A
#undef B
#undef T
- MEMCPY( product, temp, 16*sizeof(GLdouble) );
+ MEMCPY(product, temp, 16 * sizeof(GLdouble));
}
* Code contributed by Jacques Leroy jle@star.be
* Return GL_TRUE for success, GL_FALSE for failure (singular matrix)
*/
-static GLboolean invert_matrix( const GLdouble *m, GLdouble *out )
+static GLboolean
+invert_matrix(const GLdouble * m, GLdouble * out)
{
/* NB. OpenGL Matrices are COLUMN major. */
#define SWAP_ROWS(a, b) { GLdouble *_tmp = a; (a)=(b); (b)=_tmp; }
#define MAT(m,r,c) (m)[(c)*4+(r)]
- GLdouble wtmp[4][8];
- GLdouble m0, m1, m2, m3, s;
- GLdouble *r0, *r1, *r2, *r3;
-
- r0 = wtmp[0], r1 = wtmp[1], r2 = wtmp[2], r3 = wtmp[3];
-
- r0[0] = MAT(m,0,0), r0[1] = MAT(m,0,1),
- r0[2] = MAT(m,0,2), r0[3] = MAT(m,0,3),
- r0[4] = 1.0, r0[5] = r0[6] = r0[7] = 0.0,
-
- r1[0] = MAT(m,1,0), r1[1] = MAT(m,1,1),
- r1[2] = MAT(m,1,2), r1[3] = MAT(m,1,3),
- r1[5] = 1.0, r1[4] = r1[6] = r1[7] = 0.0,
-
- r2[0] = MAT(m,2,0), r2[1] = MAT(m,2,1),
- r2[2] = MAT(m,2,2), r2[3] = MAT(m,2,3),
- r2[6] = 1.0, r2[4] = r2[5] = r2[7] = 0.0,
-
- r3[0] = MAT(m,3,0), r3[1] = MAT(m,3,1),
- r3[2] = MAT(m,3,2), r3[3] = MAT(m,3,3),
- r3[7] = 1.0, r3[4] = r3[5] = r3[6] = 0.0;
-
- /* choose pivot - or die */
- if (fabs(r3[0])>fabs(r2[0])) SWAP_ROWS(r3, r2);
- if (fabs(r2[0])>fabs(r1[0])) SWAP_ROWS(r2, r1);
- if (fabs(r1[0])>fabs(r0[0])) SWAP_ROWS(r1, r0);
- if (0.0 == r0[0]) return GL_FALSE;
-
- /* eliminate first variable */
- m1 = r1[0]/r0[0]; m2 = r2[0]/r0[0]; m3 = r3[0]/r0[0];
- s = r0[1]; r1[1] -= m1 * s; r2[1] -= m2 * s; r3[1] -= m3 * s;
- s = r0[2]; r1[2] -= m1 * s; r2[2] -= m2 * s; r3[2] -= m3 * s;
- s = r0[3]; r1[3] -= m1 * s; r2[3] -= m2 * s; r3[3] -= m3 * s;
- s = r0[4];
- if (s != 0.0) { r1[4] -= m1 * s; r2[4] -= m2 * s; r3[4] -= m3 * s; }
- s = r0[5];
- if (s != 0.0) { r1[5] -= m1 * s; r2[5] -= m2 * s; r3[5] -= m3 * s; }
- s = r0[6];
- if (s != 0.0) { r1[6] -= m1 * s; r2[6] -= m2 * s; r3[6] -= m3 * s; }
- s = r0[7];
- if (s != 0.0) { r1[7] -= m1 * s; r2[7] -= m2 * s; r3[7] -= m3 * s; }
-
- /* choose pivot - or die */
- if (fabs(r3[1])>fabs(r2[1])) SWAP_ROWS(r3, r2);
- if (fabs(r2[1])>fabs(r1[1])) SWAP_ROWS(r2, r1);
- if (0.0 == r1[1]) return GL_FALSE;
-
- /* eliminate second variable */
- m2 = r2[1]/r1[1]; m3 = r3[1]/r1[1];
- r2[2] -= m2 * r1[2]; r3[2] -= m3 * r1[2];
- r2[3] -= m2 * r1[3]; r3[3] -= m3 * r1[3];
- s = r1[4]; if (0.0 != s) { r2[4] -= m2 * s; r3[4] -= m3 * s; }
- s = r1[5]; if (0.0 != s) { r2[5] -= m2 * s; r3[5] -= m3 * s; }
- s = r1[6]; if (0.0 != s) { r2[6] -= m2 * s; r3[6] -= m3 * s; }
- s = r1[7]; if (0.0 != s) { r2[7] -= m2 * s; r3[7] -= m3 * s; }
-
- /* choose pivot - or die */
- if (fabs(r3[2])>fabs(r2[2])) SWAP_ROWS(r3, r2);
- if (0.0 == r2[2]) return GL_FALSE;
-
- /* eliminate third variable */
- m3 = r3[2]/r2[2];
- r3[3] -= m3 * r2[3], r3[4] -= m3 * r2[4],
- r3[5] -= m3 * r2[5], r3[6] -= m3 * r2[6],
- r3[7] -= m3 * r2[7];
-
- /* last check */
- if (0.0 == r3[3]) return GL_FALSE;
-
- s = 1.0/r3[3]; /* now back substitute row 3 */
- r3[4] *= s; r3[5] *= s; r3[6] *= s; r3[7] *= s;
-
- m2 = r2[3]; /* now back substitute row 2 */
- s = 1.0/r2[2];
- r2[4] = s * (r2[4] - r3[4] * m2), r2[5] = s * (r2[5] - r3[5] * m2),
- r2[6] = s * (r2[6] - r3[6] * m2), r2[7] = s * (r2[7] - r3[7] * m2);
- m1 = r1[3];
- r1[4] -= r3[4] * m1, r1[5] -= r3[5] * m1,
- r1[6] -= r3[6] * m1, r1[7] -= r3[7] * m1;
- m0 = r0[3];
- r0[4] -= r3[4] * m0, r0[5] -= r3[5] * m0,
- r0[6] -= r3[6] * m0, r0[7] -= r3[7] * m0;
-
- m1 = r1[2]; /* now back substitute row 1 */
- s = 1.0/r1[1];
- r1[4] = s * (r1[4] - r2[4] * m1), r1[5] = s * (r1[5] - r2[5] * m1),
- r1[6] = s * (r1[6] - r2[6] * m1), r1[7] = s * (r1[7] - r2[7] * m1);
- m0 = r0[2];
- r0[4] -= r2[4] * m0, r0[5] -= r2[5] * m0,
- r0[6] -= r2[6] * m0, r0[7] -= r2[7] * m0;
-
- m0 = r0[1]; /* now back substitute row 0 */
- s = 1.0/r0[0];
- r0[4] = s * (r0[4] - r1[4] * m0), r0[5] = s * (r0[5] - r1[5] * m0),
- r0[6] = s * (r0[6] - r1[6] * m0), r0[7] = s * (r0[7] - r1[7] * m0);
-
- MAT(out,0,0) = r0[4]; MAT(out,0,1) = r0[5],
- MAT(out,0,2) = r0[6]; MAT(out,0,3) = r0[7],
- MAT(out,1,0) = r1[4]; MAT(out,1,1) = r1[5],
- MAT(out,1,2) = r1[6]; MAT(out,1,3) = r1[7],
- MAT(out,2,0) = r2[4]; MAT(out,2,1) = r2[5],
- MAT(out,2,2) = r2[6]; MAT(out,2,3) = r2[7],
- MAT(out,3,0) = r3[4]; MAT(out,3,1) = r3[5],
- MAT(out,3,2) = r3[6]; MAT(out,3,3) = r3[7];
-
- return GL_TRUE;
+ GLdouble wtmp[4][8];
+ GLdouble m0, m1, m2, m3, s;
+ GLdouble *r0, *r1, *r2, *r3;
+
+ r0 = wtmp[0], r1 = wtmp[1], r2 = wtmp[2], r3 = wtmp[3];
+
+ r0[0] = MAT(m, 0, 0), r0[1] = MAT(m, 0, 1),
+ r0[2] = MAT(m, 0, 2), r0[3] = MAT(m, 0, 3),
+ r0[4] = 1.0, r0[5] = r0[6] = r0[7] = 0.0,
+ r1[0] = MAT(m, 1, 0), r1[1] = MAT(m, 1, 1),
+ r1[2] = MAT(m, 1, 2), r1[3] = MAT(m, 1, 3),
+ r1[5] = 1.0, r1[4] = r1[6] = r1[7] = 0.0,
+ r2[0] = MAT(m, 2, 0), r2[1] = MAT(m, 2, 1),
+ r2[2] = MAT(m, 2, 2), r2[3] = MAT(m, 2, 3),
+ r2[6] = 1.0, r2[4] = r2[5] = r2[7] = 0.0,
+ r3[0] = MAT(m, 3, 0), r3[1] = MAT(m, 3, 1),
+ r3[2] = MAT(m, 3, 2), r3[3] = MAT(m, 3, 3),
+ r3[7] = 1.0, r3[4] = r3[5] = r3[6] = 0.0;
+
+ /* choose pivot - or die */
+ if (fabs(r3[0]) > fabs(r2[0]))
+ SWAP_ROWS(r3, r2);
+ if (fabs(r2[0]) > fabs(r1[0]))
+ SWAP_ROWS(r2, r1);
+ if (fabs(r1[0]) > fabs(r0[0]))
+ SWAP_ROWS(r1, r0);
+ if (0.0 == r0[0])
+ return GL_FALSE;
+
+ /* eliminate first variable */
+ m1 = r1[0] / r0[0];
+ m2 = r2[0] / r0[0];
+ m3 = r3[0] / r0[0];
+ s = r0[1];
+ r1[1] -= m1 * s;
+ r2[1] -= m2 * s;
+ r3[1] -= m3 * s;
+ s = r0[2];
+ r1[2] -= m1 * s;
+ r2[2] -= m2 * s;
+ r3[2] -= m3 * s;
+ s = r0[3];
+ r1[3] -= m1 * s;
+ r2[3] -= m2 * s;
+ r3[3] -= m3 * s;
+ s = r0[4];
+ if (s != 0.0) {
+ r1[4] -= m1 * s;
+ r2[4] -= m2 * s;
+ r3[4] -= m3 * s;
+ }
+ s = r0[5];
+ if (s != 0.0) {
+ r1[5] -= m1 * s;
+ r2[5] -= m2 * s;
+ r3[5] -= m3 * s;
+ }
+ s = r0[6];
+ if (s != 0.0) {
+ r1[6] -= m1 * s;
+ r2[6] -= m2 * s;
+ r3[6] -= m3 * s;
+ }
+ s = r0[7];
+ if (s != 0.0) {
+ r1[7] -= m1 * s;
+ r2[7] -= m2 * s;
+ r3[7] -= m3 * s;
+ }
+
+ /* choose pivot - or die */
+ if (fabs(r3[1]) > fabs(r2[1]))
+ SWAP_ROWS(r3, r2);
+ if (fabs(r2[1]) > fabs(r1[1]))
+ SWAP_ROWS(r2, r1);
+ if (0.0 == r1[1])
+ return GL_FALSE;
+
+ /* eliminate second variable */
+ m2 = r2[1] / r1[1];
+ m3 = r3[1] / r1[1];
+ r2[2] -= m2 * r1[2];
+ r3[2] -= m3 * r1[2];
+ r2[3] -= m2 * r1[3];
+ r3[3] -= m3 * r1[3];
+ s = r1[4];
+ if (0.0 != s) {
+ r2[4] -= m2 * s;
+ r3[4] -= m3 * s;
+ }
+ s = r1[5];
+ if (0.0 != s) {
+ r2[5] -= m2 * s;
+ r3[5] -= m3 * s;
+ }
+ s = r1[6];
+ if (0.0 != s) {
+ r2[6] -= m2 * s;
+ r3[6] -= m3 * s;
+ }
+ s = r1[7];
+ if (0.0 != s) {
+ r2[7] -= m2 * s;
+ r3[7] -= m3 * s;
+ }
+
+ /* choose pivot - or die */
+ if (fabs(r3[2]) > fabs(r2[2]))
+ SWAP_ROWS(r3, r2);
+ if (0.0 == r2[2])
+ return GL_FALSE;
+
+ /* eliminate third variable */
+ m3 = r3[2] / r2[2];
+ r3[3] -= m3 * r2[3], r3[4] -= m3 * r2[4],
+ r3[5] -= m3 * r2[5], r3[6] -= m3 * r2[6], r3[7] -= m3 * r2[7];
+
+ /* last check */
+ if (0.0 == r3[3])
+ return GL_FALSE;
+
+ s = 1.0 / r3[3]; /* now back substitute row 3 */
+ r3[4] *= s;
+ r3[5] *= s;
+ r3[6] *= s;
+ r3[7] *= s;
+
+ m2 = r2[3]; /* now back substitute row 2 */
+ s = 1.0 / r2[2];
+ r2[4] = s * (r2[4] - r3[4] * m2), r2[5] = s * (r2[5] - r3[5] * m2),
+ r2[6] = s * (r2[6] - r3[6] * m2), r2[7] = s * (r2[7] - r3[7] * m2);
+ m1 = r1[3];
+ r1[4] -= r3[4] * m1, r1[5] -= r3[5] * m1,
+ r1[6] -= r3[6] * m1, r1[7] -= r3[7] * m1;
+ m0 = r0[3];
+ r0[4] -= r3[4] * m0, r0[5] -= r3[5] * m0,
+ r0[6] -= r3[6] * m0, r0[7] -= r3[7] * m0;
+
+ m1 = r1[2]; /* now back substitute row 1 */
+ s = 1.0 / r1[1];
+ r1[4] = s * (r1[4] - r2[4] * m1), r1[5] = s * (r1[5] - r2[5] * m1),
+ r1[6] = s * (r1[6] - r2[6] * m1), r1[7] = s * (r1[7] - r2[7] * m1);
+ m0 = r0[2];
+ r0[4] -= r2[4] * m0, r0[5] -= r2[5] * m0,
+ r0[6] -= r2[6] * m0, r0[7] -= r2[7] * m0;
+
+ m0 = r0[1]; /* now back substitute row 0 */
+ s = 1.0 / r0[0];
+ r0[4] = s * (r0[4] - r1[4] * m0), r0[5] = s * (r0[5] - r1[5] * m0),
+ r0[6] = s * (r0[6] - r1[6] * m0), r0[7] = s * (r0[7] - r1[7] * m0);
+
+ MAT(out, 0, 0) = r0[4];
+ MAT(out, 0, 1) = r0[5], MAT(out, 0, 2) = r0[6];
+ MAT(out, 0, 3) = r0[7], MAT(out, 1, 0) = r1[4];
+ MAT(out, 1, 1) = r1[5], MAT(out, 1, 2) = r1[6];
+ MAT(out, 1, 3) = r1[7], MAT(out, 2, 0) = r2[4];
+ MAT(out, 2, 1) = r2[5], MAT(out, 2, 2) = r2[6];
+ MAT(out, 2, 3) = r2[7], MAT(out, 3, 0) = r3[4];
+ MAT(out, 3, 1) = r3[5], MAT(out, 3, 2) = r3[6];
+ MAT(out, 3, 3) = r3[7];
+
+ return GL_TRUE;
#undef MAT
#undef SWAP_ROWS
/* projection du point (objx,objy,obz) sur l'ecran (winx,winy,winz) */
-GLint GLAPIENTRY gluProject(GLdouble objx,GLdouble objy,GLdouble objz,
- const GLdouble model[16],const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble *winx,GLdouble *winy,GLdouble *winz)
+GLint GLAPIENTRY
+gluProject(GLdouble objx, GLdouble objy, GLdouble objz,
+ const GLdouble model[16], const GLdouble proj[16],
+ const GLint viewport[4],
+ GLdouble * winx, GLdouble * winy, GLdouble * winz)
{
- /* matrice de transformation */
- GLdouble in[4],out[4];
-
- /* initilise la matrice et le vecteur a transformer */
- in[0]=objx; in[1]=objy; in[2]=objz; in[3]=1.0;
- transform_point(out,model,in);
- transform_point(in,proj,out);
-
- /* d'ou le resultat normalise entre -1 et 1*/
- if (in[3]==0.0)
- return GL_FALSE;
-
- in[0]/=in[3]; in[1]/=in[3]; in[2]/=in[3];
-
- /* en coordonnees ecran */
- *winx = viewport[0]+(1+in[0])*viewport[2]/2;
- *winy = viewport[1]+(1+in[1])*viewport[3]/2;
- /* entre 0 et 1 suivant z */
- *winz = (1+in[2])/2;
- return GL_TRUE;
+ /* matrice de transformation */
+ GLdouble in[4], out[4];
+
+ /* initilise la matrice et le vecteur a transformer */
+ in[0] = objx;
+ in[1] = objy;
+ in[2] = objz;
+ in[3] = 1.0;
+ transform_point(out, model, in);
+ transform_point(in, proj, out);
+
+ /* d'ou le resultat normalise entre -1 et 1 */
+ if (in[3] == 0.0)
+ return GL_FALSE;
+
+ in[0] /= in[3];
+ in[1] /= in[3];
+ in[2] /= in[3];
+
+ /* en coordonnees ecran */
+ *winx = viewport[0] + (1 + in[0]) * viewport[2] / 2;
+ *winy = viewport[1] + (1 + in[1]) * viewport[3] / 2;
+ /* entre 0 et 1 suivant z */
+ *winz = (1 + in[2]) / 2;
+ return GL_TRUE;
}
/* transformation du point ecran (winx,winy,winz) en point objet */
-GLint GLAPIENTRY gluUnProject(GLdouble winx,GLdouble winy,GLdouble winz,
- const GLdouble model[16],const GLdouble proj[16],
- const GLint viewport[4],
- GLdouble *objx,GLdouble *objy,GLdouble *objz)
+GLint GLAPIENTRY
+gluUnProject(GLdouble winx, GLdouble winy, GLdouble winz,
+ const GLdouble model[16], const GLdouble proj[16],
+ const GLint viewport[4],
+ GLdouble * objx, GLdouble * objy, GLdouble * objz)
{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4],out[4];
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0]=(winx-viewport[0])*2/viewport[2] - 1.0;
- in[1]=(winy-viewport[1])*2/viewport[3] - 1.0;
- in[2]=2*winz - 1.0;
- in[3]=1.0;
-
- /* calcul transformation inverse */
- matmul(A,proj,model);
- invert_matrix(A,m);
-
- /* d'ou les coordonnees objets */
- transform_point(out,m,in);
- if (out[3]==0.0)
- return GL_FALSE;
- *objx=out[0]/out[3];
- *objy=out[1]/out[3];
- *objz=out[2]/out[3];
- return GL_TRUE;
+ /* matrice de transformation */
+ GLdouble m[16], A[16];
+ GLdouble in[4], out[4];
+
+ /* transformation coordonnees normalisees entre -1 et 1 */
+ in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
+ in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
+ in[2] = 2 * winz - 1.0;
+ in[3] = 1.0;
+
+ /* calcul transformation inverse */
+ matmul(A, proj, model);
+ invert_matrix(A, m);
+
+ /* d'ou les coordonnees objets */
+ transform_point(out, m, in);
+ if (out[3] == 0.0)
+ return GL_FALSE;
+ *objx = out[0] / out[3];
+ *objy = out[1] / out[3];
+ *objz = out[2] / out[3];
+ return GL_TRUE;
}
* New in GLU 1.3
* This is like gluUnProject but also takes near and far DepthRange values.
*/
+#ifdef GLU_VERSION_1_3
GLint GLAPIENTRY
-gluUnProject4( GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
- const GLdouble modelMatrix[16],
- const GLdouble projMatrix[16],
- const GLint viewport[4],
- GLclampd nearZ, GLclampd farZ,
- GLdouble *objx, GLdouble *objy, GLdouble *objz, GLdouble *objw )
+gluUnProject4(GLdouble winx, GLdouble winy, GLdouble winz, GLdouble clipw,
+ const GLdouble modelMatrix[16],
+ const GLdouble projMatrix[16],
+ const GLint viewport[4],
+ GLclampd nearZ, GLclampd farZ,
+ GLdouble * objx, GLdouble * objy, GLdouble * objz,
+ GLdouble * objw)
{
- /* matrice de transformation */
- GLdouble m[16], A[16];
- GLdouble in[4],out[4];
- GLdouble z = nearZ + winz * (farZ - nearZ);
-
- /* transformation coordonnees normalisees entre -1 et 1 */
- in[0] = (winx-viewport[0])*2/viewport[2] - 1.0;
- in[1] = (winy-viewport[1])*2/viewport[3] - 1.0;
- in[2] = 2.0 * z - 1.0;
- in[3] = clipw;
-
- /* calcul transformation inverse */
- matmul(A,projMatrix,modelMatrix);
- invert_matrix(A,m);
-
- /* d'ou les coordonnees objets */
- transform_point(out,m,in);
- if (out[3]==0.0)
- return GL_FALSE;
- *objx=out[0]/out[3];
- *objy=out[1]/out[3];
- *objz=out[2]/out[3];
- *objw=out[3];
- return GL_TRUE;
+ /* matrice de transformation */
+ GLdouble m[16], A[16];
+ GLdouble in[4], out[4];
+ GLdouble z = nearZ + winz * (farZ - nearZ);
+
+ /* transformation coordonnees normalisees entre -1 et 1 */
+ in[0] = (winx - viewport[0]) * 2 / viewport[2] - 1.0;
+ in[1] = (winy - viewport[1]) * 2 / viewport[3] - 1.0;
+ in[2] = 2.0 * z - 1.0;
+ in[3] = clipw;
+
+ /* calcul transformation inverse */
+ matmul(A, projMatrix, modelMatrix);
+ invert_matrix(A, m);
+
+ /* d'ou les coordonnees objets */
+ transform_point(out, m, in);
+ if (out[3] == 0.0)
+ return GL_FALSE;
+ *objx = out[0] / out[3];
+ *objy = out[1] / out[3];
+ *objz = out[2] / out[3];
+ *objw = out[3];
+ return GL_TRUE;
}
+#endif
-/* $Id: quadric.c,v 1.7 2000/02/10 17:45:52 brianp Exp $ */
+/* $Id: quadric.c,v 1.8 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
#include <stdio.h>
#include <stdlib.h>
#include "gluP.h"
-#include "tess_macros.h"
#endif
+#ifndef M_PI
+# define M_PI (3.1415926)
+#endif
+
+
+/*
+ * Convert degrees to radians:
+ */
+#define DEG_TO_RAD(A) ((A)*(M_PI/180.0))
+
+
/*
* Sin and Cos for degree angles:
*/
-struct GLUquadric {
- GLenum DrawStyle; /* GLU_FILL, LINE, SILHOUETTE, or POINT */
- GLenum Orientation; /* GLU_INSIDE or GLU_OUTSIDE */
- GLboolean TextureFlag; /* Generate texture coords? */
- GLenum Normals; /* GLU_NONE, GLU_FLAT, or GLU_SMOOTH */
- void (GLCALLBACKP ErrorFunc)(GLenum err); /* Error handler callback function */
+struct GLUquadric
+{
+ GLenum DrawStyle; /* GLU_FILL, LINE, SILHOUETTE, or POINT */
+ GLenum Orientation; /* GLU_INSIDE or GLU_OUTSIDE */
+ GLboolean TextureFlag; /* Generate texture coords? */
+ GLenum Normals; /* GLU_NONE, GLU_FLAT, or GLU_SMOOTH */
+ void (GLCALLBACK * ErrorFunc) (GLenum err); /* Error handler callback function */
};
/*
* Process a GLU error.
*/
-static void quadric_error( GLUquadricObj *qobj, GLenum error, const char *msg )
+static void
+quadric_error(GLUquadricObj * qobj, GLenum error, const char *msg)
{
/* Call the error call back function if any */
if (qobj->ErrorFunc) {
- (*qobj->ErrorFunc)( error );
+ (*qobj->ErrorFunc) (error);
}
/* Print a message to stdout if MESA_DEBUG variable is defined */
if (getenv("MESA_DEBUG")) {
- fprintf(stderr,"GLUError: %s: %s\n", (char*) gluErrorString(error), msg);
+ fprintf(stderr, "GLUError: %s: %s\n", (char *) gluErrorString(error),
+ msg);
}
}
-GLUquadricObj * GLAPIENTRY gluNewQuadric( void )
+GLUquadricObj *GLAPIENTRY
+gluNewQuadric(void)
{
GLUquadricObj *q;
- q = (GLUquadricObj *) malloc( sizeof(struct GLUquadric) );
+ q = (GLUquadricObj *) malloc(sizeof(struct GLUquadric));
if (q) {
q->DrawStyle = GLU_FILL;
q->Orientation = GLU_OUTSIDE;
-void GLAPIENTRY gluDeleteQuadric( GLUquadricObj *state )
+void GLAPIENTRY
+gluDeleteQuadric(GLUquadricObj * state)
{
if (state) {
- free( (void *) state );
+ free((void *) state);
}
}
* Set the drawing style to be GLU_FILL, GLU_LINE, GLU_SILHOUETTE,
* or GLU_POINT.
*/
-void GLAPIENTRY gluQuadricDrawStyle( GLUquadricObj *quadObject, GLenum drawStyle )
+void GLAPIENTRY
+gluQuadricDrawStyle(GLUquadricObj * quadObject, GLenum drawStyle)
{
- if (quadObject && (drawStyle==GLU_FILL || drawStyle==GLU_LINE
- || drawStyle==GLU_SILHOUETTE || drawStyle==GLU_POINT)) {
+ if (quadObject && (drawStyle == GLU_FILL || drawStyle == GLU_LINE
+ || drawStyle == GLU_SILHOUETTE
+ || drawStyle == GLU_POINT)) {
quadObject->DrawStyle = drawStyle;
}
else {
- quadric_error( quadObject, GLU_INVALID_ENUM, "qluQuadricDrawStyle" );
+ quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricDrawStyle");
}
}
/*
* Set the orientation to GLU_INSIDE or GLU_OUTSIDE.
*/
-void GLAPIENTRY gluQuadricOrientation( GLUquadricObj *quadObject,
- GLenum orientation )
+void GLAPIENTRY
+gluQuadricOrientation(GLUquadricObj * quadObject, GLenum orientation)
{
- if (quadObject && (orientation==GLU_INSIDE || orientation==GLU_OUTSIDE)) {
+ if (quadObject
+ && (orientation == GLU_INSIDE || orientation == GLU_OUTSIDE)) {
quadObject->Orientation = orientation;
}
else {
- quadric_error( quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation" );
+ quadric_error(quadObject, GLU_INVALID_ENUM, "qluQuadricOrientation");
}
}
/*
* Set the error handler callback function.
*/
-void GLAPIENTRY gluQuadricCallback( GLUquadricObj *qobj,
- GLenum which, void (GLCALLBACKP fn)() )
+void GLAPIENTRY
+gluQuadricCallback(GLUquadricObj * qobj,
+ GLenum which, void (GLCALLBACK * fn) ())
{
/*
* UGH, this is a mess! I thought ANSI was a standard.
*/
- if (qobj && which==GLU_ERROR) {
+ if (qobj && which == GLU_ERROR) {
#ifdef __CYGWIN32__
- qobj->ErrorFunc = (void(GLCALLBACKPCAST)(GLenum))fn;
+ qobj->ErrorFunc = (void (GLCALLBACKPCAST) (GLenum)) fn;
#elif defined(OPENSTEP)
- qobj->ErrorFunc = (void(*)(GLenum))fn;
+ qobj->ErrorFunc = (void (*)(GLenum)) fn;
#elif defined(_WIN32)
- qobj->ErrorFunc = (void(GLCALLBACKP)(int))fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) (int)) fn;
#elif defined(__STORM__)
- qobj->ErrorFunc = (void(GLCALLBACKP)(GLenum))fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) (GLenum)) fn;
#elif defined(__BEOS__)
- qobj->ErrorFunc = (void(*)(GLenum))fn;
+ qobj->ErrorFunc = (void (*)(GLenum)) fn;
#else
- qobj->ErrorFunc = (void(GLCALLBACKP)())fn;
+ qobj->ErrorFunc = (void (GLCALLBACK *) ()) fn;
#endif
}
}
-void GLAPIENTRY gluQuadricNormals( GLUquadricObj *quadObject, GLenum normals )
+void GLAPIENTRY
+gluQuadricNormals(GLUquadricObj * quadObject, GLenum normals)
{
if (quadObject
- && (normals==GLU_NONE || normals==GLU_FLAT || normals==GLU_SMOOTH)) {
+ && (normals == GLU_NONE || normals == GLU_FLAT
+ || normals == GLU_SMOOTH)) {
quadObject->Normals = normals;
}
}
-void GLAPIENTRY gluQuadricTexture( GLUquadricObj *quadObject,
- GLboolean textureCoords )
+void GLAPIENTRY
+gluQuadricTexture(GLUquadricObj * quadObject, GLboolean textureCoords)
{
if (quadObject) {
quadObject->TextureFlag = textureCoords;
/*
* Call glNormal3f after scaling normal to unit length.
*/
-static void normal3f( GLfloat x, GLfloat y, GLfloat z )
+static void
+normal3f(GLfloat x, GLfloat y, GLfloat z)
{
GLdouble mag;
- mag = sqrt( x*x + y*y + z*z );
- if (mag>0.00001F) {
+ mag = sqrt(x * x + y * y + z * z);
+ if (mag > 0.00001F) {
x /= mag;
y /= mag;
z /= mag;
}
- glNormal3f( x, y, z );
+ glNormal3f(x, y, z);
}
-void GLAPIENTRY gluCylinder( GLUquadricObj *qobj,
- GLdouble baseRadius, GLdouble topRadius,
- GLdouble height, GLint slices, GLint stacks )
+void GLAPIENTRY
+gluCylinder(GLUquadricObj * qobj,
+ GLdouble baseRadius, GLdouble topRadius,
+ GLdouble height, GLint slices, GLint stacks)
{
GLdouble da, r, dr, dz;
GLfloat x, y, z, nz, nsign;
GLint i, j;
- if (qobj->Orientation==GLU_INSIDE) {
+ if (qobj->Orientation == GLU_INSIDE) {
nsign = -1.0;
}
else {
nsign = 1.0;
}
- da = 2.0*M_PI / slices;
- dr = (topRadius-baseRadius) / stacks;
+ da = 2.0 * M_PI / slices;
+ dr = (topRadius - baseRadius) / stacks;
dz = height / stacks;
- nz = (baseRadius-topRadius) / height; /* Z component of normal vectors */
+ nz = (baseRadius - topRadius) / height; /* Z component of normal vectors */
- if (qobj->DrawStyle==GLU_POINT) {
- glBegin( GL_POINTS );
- for (i=0;i<slices;i++) {
- x = cos(i*da);
- y = sin(i*da);
- normal3f( x*nsign, y*nsign, nz*nsign );
+ if (qobj->DrawStyle == GLU_POINT) {
+ glBegin(GL_POINTS);
+ for (i = 0; i < slices; i++) {
+ x = cos(i * da);
+ y = sin(i * da);
+ normal3f(x * nsign, y * nsign, nz * nsign);
z = 0.0;
r = baseRadius;
- for (j=0;j<=stacks;j++) {
- glVertex3f( x*r, y*r, z );
+ for (j = 0; j <= stacks; j++) {
+ glVertex3f(x * r, y * r, z);
z += dz;
r += dr;
}
}
glEnd();
}
- else if (qobj->DrawStyle==GLU_LINE || qobj->DrawStyle==GLU_SILHOUETTE) {
+ else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
/* Draw rings */
- if (qobj->DrawStyle==GLU_LINE) {
+ if (qobj->DrawStyle == GLU_LINE) {
z = 0.0;
r = baseRadius;
- for (j=0;j<=stacks;j++) {
- glBegin( GL_LINE_LOOP );
- for (i=0;i<slices;i++) {
- x = cos(i*da);
- y = sin(i*da);
- normal3f( x*nsign, y*nsign, nz*nsign );
- glVertex3f( x*r, y*r, z );
+ for (j = 0; j <= stacks; j++) {
+ glBegin(GL_LINE_LOOP);
+ for (i = 0; i < slices; i++) {
+ x = cos(i * da);
+ y = sin(i * da);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ glVertex3f(x * r, y * r, z);
}
glEnd();
z += dz;
}
else {
/* draw one ring at each end */
- if (baseRadius!=0.0) {
- glBegin( GL_LINE_LOOP );
- for (i=0;i<slices;i++) {
- x = cos(i*da);
- y = sin(i*da);
- normal3f( x*nsign, y*nsign, nz*nsign );
- glVertex3f( x*baseRadius, y*baseRadius, 0.0 );
+ if (baseRadius != 0.0) {
+ glBegin(GL_LINE_LOOP);
+ for (i = 0; i < slices; i++) {
+ x = cos(i * da);
+ y = sin(i * da);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ glVertex3f(x * baseRadius, y * baseRadius, 0.0);
}
glEnd();
- glBegin( GL_LINE_LOOP );
- for (i=0;i<slices;i++) {
- x = cos(i*da);
- y = sin(i*da);
- normal3f( x*nsign, y*nsign, nz*nsign );
- glVertex3f( x*topRadius, y*topRadius, height );
+ glBegin(GL_LINE_LOOP);
+ for (i = 0; i < slices; i++) {
+ x = cos(i * da);
+ y = sin(i * da);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ glVertex3f(x * topRadius, y * topRadius, height);
}
glEnd();
}
}
/* draw length lines */
- glBegin( GL_LINES );
- for (i=0;i<slices;i++) {
- x = cos(i*da);
- y = sin(i*da);
- normal3f( x*nsign, y*nsign, nz*nsign );
- glVertex3f( x*baseRadius, y*baseRadius, 0.0 );
- glVertex3f( x*topRadius, y*topRadius, height );
+ glBegin(GL_LINES);
+ for (i = 0; i < slices; i++) {
+ x = cos(i * da);
+ y = sin(i * da);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ glVertex3f(x * baseRadius, y * baseRadius, 0.0);
+ glVertex3f(x * topRadius, y * topRadius, height);
}
glEnd();
}
- else if (qobj->DrawStyle==GLU_FILL) {
+ else if (qobj->DrawStyle == GLU_FILL) {
GLfloat ds = 1.0 / slices;
GLfloat dt = 1.0 / stacks;
GLfloat t = 0.0;
z = 0.0;
r = baseRadius;
- for (j=0;j<stacks;j++) {
- GLfloat s = 0.0;
- glBegin( GL_QUAD_STRIP );
- for (i=0;i<=slices;i++) {
- GLfloat x, y;
- if (i == slices) {
- x = sin(0.0);
- y = cos(0.0);
- }
- else {
- x = sin(i * da);
- y = cos(i * da);
- }
- if (nsign==1.0) {
- normal3f( x*nsign, y*nsign, nz*nsign );
- TXTR_COORD(s, t);
- glVertex3f( x * r, y * r, z );
- normal3f( x*nsign, y*nsign, nz*nsign );
- TXTR_COORD(s, t + dt);
- glVertex3f( x * (r + dr), y * (r + dr), z + dz);
- }
- else {
- normal3f( x*nsign, y*nsign, nz*nsign );
- TXTR_COORD(s, t);
- glVertex3f( x * r, y * r, z );
- normal3f( x*nsign, y*nsign, nz*nsign );
- TXTR_COORD(s, t + dt);
- glVertex3f( x * (r + dr), y * (r + dr), z + dz);
- }
- s += ds;
- } /* for slices */
- glEnd();
- r += dr;
- t += dt;
- z += dz;
- } /* for stacks */
+ for (j = 0; j < stacks; j++) {
+ GLfloat s = 0.0;
+ glBegin(GL_QUAD_STRIP);
+ for (i = 0; i <= slices; i++) {
+ GLfloat x, y;
+ if (i == slices) {
+ x = sin(0.0);
+ y = cos(0.0);
+ }
+ else {
+ x = sin(i * da);
+ y = cos(i * da);
+ }
+ if (nsign == 1.0) {
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ TXTR_COORD(s, t);
+ glVertex3f(x * r, y * r, z);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ TXTR_COORD(s, t + dt);
+ glVertex3f(x * (r + dr), y * (r + dr), z + dz);
+ }
+ else {
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ TXTR_COORD(s, t);
+ glVertex3f(x * r, y * r, z);
+ normal3f(x * nsign, y * nsign, nz * nsign);
+ TXTR_COORD(s, t + dt);
+ glVertex3f(x * (r + dr), y * (r + dr), z + dz);
+ }
+ s += ds;
+ } /* for slices */
+ glEnd();
+ r += dr;
+ t += dt;
+ z += dz;
+ } /* for stacks */
}
}
-void GLAPIENTRY gluSphere( GLUquadricObj *qobj,
- GLdouble radius, GLint slices, GLint stacks )
+void GLAPIENTRY
+gluSphere(GLUquadricObj * qobj, GLdouble radius, GLint slices, GLint stacks)
{
GLfloat rho, drho, theta, dtheta;
GLfloat x, y, z;
GLboolean normals;
GLfloat nsign;
- if (qobj->Normals==GLU_NONE) {
+ if (qobj->Normals == GLU_NONE) {
normals = GL_FALSE;
}
else {
normals = GL_TRUE;
}
- if (qobj->Orientation==GLU_INSIDE) {
+ if (qobj->Orientation == GLU_INSIDE) {
nsign = -1.0;
}
else {
/* t goes from -1.0/+1.0 at z = -radius/+radius (linear along longitudes) */
/* cannot use triangle fan on texturing (s coord. at top/bottom tip varies) */
- if (qobj->DrawStyle==GLU_FILL) {
- if (!qobj->TextureFlag) {
- /* draw +Z end as a triangle fan */
- glBegin( GL_TRIANGLE_FAN );
- glNormal3f( 0.0, 0.0, 1.0 );
- TXTR_COORD(0.5,1.0);
- glVertex3f( 0.0, 0.0, nsign * radius );
- for (j=0;j<=slices;j++) {
- theta = (j==slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(drho);
- y = cos(theta) * sin(drho);
- z = nsign * cos(drho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- glVertex3f( x*radius, y*radius, z*radius );
+ if (qobj->DrawStyle == GLU_FILL) {
+ if (!qobj->TextureFlag) {
+ /* draw +Z end as a triangle fan */
+ glBegin(GL_TRIANGLE_FAN);
+ glNormal3f(0.0, 0.0, 1.0);
+ TXTR_COORD(0.5, 1.0);
+ glVertex3f(0.0, 0.0, nsign * radius);
+ for (j = 0; j <= slices; j++) {
+ theta = (j == slices) ? 0.0 : j * dtheta;
+ x = -sin(theta) * sin(drho);
+ y = cos(theta) * sin(drho);
+ z = nsign * cos(drho);
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ glVertex3f(x * radius, y * radius, z * radius);
+ }
+ glEnd();
}
- glEnd();
- }
ds = 1.0 / slices;
dt = 1.0 / stacks;
- t = 1.0; /* because loop now runs from 0 */
+ t = 1.0; /* because loop now runs from 0 */
if (qobj->TextureFlag) {
- imin = 0;
- imax = stacks;
+ imin = 0;
+ imax = stacks;
}
else {
- imin = 1;
- imax = stacks-1;
+ imin = 1;
+ imax = stacks - 1;
}
/* draw intermediate stacks as quad strips */
- for (i=imin;i<imax;i++) {
+ for (i = imin; i < imax; i++) {
rho = i * drho;
- glBegin( GL_QUAD_STRIP );
- s = 0.0;
- for (j=0;j<=slices;j++) {
- theta = (j==slices) ? 0.0 : j * dtheta;
+ glBegin(GL_QUAD_STRIP);
+ s = 0.0;
+ for (j = 0; j <= slices; j++) {
+ theta = (j == slices) ? 0.0 : j * dtheta;
x = -sin(theta) * sin(rho);
y = cos(theta) * sin(rho);
z = nsign * cos(rho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- TXTR_COORD(s,t);
- glVertex3f( x*radius, y*radius, z*radius );
- x = -sin(theta) * sin(rho+drho);
- y = cos(theta) * sin(rho+drho);
- z = nsign * cos(rho+drho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- TXTR_COORD(s,t-dt);
- s += ds;
- glVertex3f( x*radius, y*radius, z*radius );
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ TXTR_COORD(s, t);
+ glVertex3f(x * radius, y * radius, z * radius);
+ x = -sin(theta) * sin(rho + drho);
+ y = cos(theta) * sin(rho + drho);
+ z = nsign * cos(rho + drho);
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ TXTR_COORD(s, t - dt);
+ s += ds;
+ glVertex3f(x * radius, y * radius, z * radius);
}
glEnd();
t -= dt;
}
- if (!qobj->TextureFlag) {
- /* draw -Z end as a triangle fan */
- glBegin( GL_TRIANGLE_FAN );
- glNormal3f( 0.0, 0.0, -1.0 );
- TXTR_COORD(0.5,0.0);
- glVertex3f( 0.0, 0.0, -radius*nsign );
- rho = M_PI - drho;
- s = 1.0;
- t = dt;
- for (j=slices;j>=0;j--) {
- theta = (j==slices) ? 0.0 : j * dtheta;
- x = -sin(theta) * sin(rho);
- y = cos(theta) * sin(rho);
- z = nsign * cos(rho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- TXTR_COORD(s,t);
- s -= ds;
- glVertex3f( x*radius, y*radius, z*radius );
+ if (!qobj->TextureFlag) {
+ /* draw -Z end as a triangle fan */
+ glBegin(GL_TRIANGLE_FAN);
+ glNormal3f(0.0, 0.0, -1.0);
+ TXTR_COORD(0.5, 0.0);
+ glVertex3f(0.0, 0.0, -radius * nsign);
+ rho = M_PI - drho;
+ s = 1.0;
+ t = dt;
+ for (j = slices; j >= 0; j--) {
+ theta = (j == slices) ? 0.0 : j * dtheta;
+ x = -sin(theta) * sin(rho);
+ y = cos(theta) * sin(rho);
+ z = nsign * cos(rho);
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ TXTR_COORD(s, t);
+ s -= ds;
+ glVertex3f(x * radius, y * radius, z * radius);
+ }
+ glEnd();
}
- glEnd();
- }
}
- else if (qobj->DrawStyle==GLU_LINE || qobj->DrawStyle==GLU_SILHOUETTE) {
+ else if (qobj->DrawStyle == GLU_LINE || qobj->DrawStyle == GLU_SILHOUETTE) {
/* draw stack lines */
- for (i=1;i<stacks;i++) { /* stack line at i==stacks-1 was missing here */
+ for (i = 1; i < stacks; i++) { /* stack line at i==stacks-1 was missing here */
rho = i * drho;
- glBegin( GL_LINE_LOOP );
- for (j=0;j<slices;j++) {
+ glBegin(GL_LINE_LOOP);
+ for (j = 0; j < slices; j++) {
theta = j * dtheta;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- glVertex3f( x*radius, y*radius, z*radius );
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ glVertex3f(x * radius, y * radius, z * radius);
}
glEnd();
}
/* draw slice lines */
- for (j=0;j<slices;j++) {
+ for (j = 0; j < slices; j++) {
theta = j * dtheta;
- glBegin( GL_LINE_STRIP );
- for (i=0;i<=stacks;i++) {
+ glBegin(GL_LINE_STRIP);
+ for (i = 0; i <= stacks; i++) {
rho = i * drho;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- glVertex3f( x*radius, y*radius, z*radius );
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ glVertex3f(x * radius, y * radius, z * radius);
}
glEnd();
}
}
- else if (qobj->DrawStyle==GLU_POINT) {
+ else if (qobj->DrawStyle == GLU_POINT) {
/* top and bottom-most points */
- glBegin( GL_POINTS );
- if (normals) glNormal3f( 0.0, 0.0, nsign );
- glVertex3d( 0.0, 0.0, radius );
- if (normals) glNormal3f( 0.0, 0.0, -nsign );
- glVertex3d( 0.0, 0.0, -radius );
+ glBegin(GL_POINTS);
+ if (normals)
+ glNormal3f(0.0, 0.0, nsign);
+ glVertex3d(0.0, 0.0, radius);
+ if (normals)
+ glNormal3f(0.0, 0.0, -nsign);
+ glVertex3d(0.0, 0.0, -radius);
/* loop over stacks */
- for (i=1;i<stacks-1;i++) {
+ for (i = 1; i < stacks - 1; i++) {
rho = i * drho;
- for (j=0;j<slices;j++) {
+ for (j = 0; j < slices; j++) {
theta = j * dtheta;
x = cos(theta) * sin(rho);
y = sin(theta) * sin(rho);
z = cos(rho);
- if (normals) glNormal3f( x*nsign, y*nsign, z*nsign );
- glVertex3f( x*radius, y*radius, z*radius );
+ if (normals)
+ glNormal3f(x * nsign, y * nsign, z * nsign);
+ glVertex3f(x * radius, y * radius, z * radius);
}
}
glEnd();
-void GLAPIENTRY gluDisk( GLUquadricObj *qobj,
- GLdouble innerRadius, GLdouble outerRadius,
- GLint slices, GLint loops )
+void GLAPIENTRY
+gluDisk(GLUquadricObj * qobj,
+ GLdouble innerRadius, GLdouble outerRadius, GLint slices, GLint loops)
{
GLfloat da, dr;
#if 0
#endif
/* Normal vectors */
- if (qobj->Normals!=GLU_NONE) {
- if (qobj->Orientation==GLU_OUTSIDE) {
- glNormal3f( 0.0, 0.0, +1.0 );
+ if (qobj->Normals != GLU_NONE) {
+ if (qobj->Orientation == GLU_OUTSIDE) {
+ glNormal3f(0.0, 0.0, +1.0);
}
else {
- glNormal3f( 0.0, 0.0, -1.0 );
+ glNormal3f(0.0, 0.0, -1.0);
}
}
- da = 2.0*M_PI / slices;
- dr = (outerRadius-innerRadius) / (GLfloat) loops;
+ da = 2.0 * M_PI / slices;
+ dr = (outerRadius - innerRadius) / (GLfloat) loops;
switch (qobj->DrawStyle) {
- case GLU_FILL:
+ case GLU_FILL:
{
- /* texture of a gluDisk is a cut out of the texture unit square
- * x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
- * (linear mapping)
- */
- GLfloat dtc = 2.0f * outerRadius;
- GLfloat sa,ca;
- GLfloat r1 = innerRadius;
- GLint l;
- for (l=0; l<loops; l++) {
+ /* texture of a gluDisk is a cut out of the texture unit square
+ * x, y in [-outerRadius, +outerRadius]; s, t in [0, 1]
+ * (linear mapping)
+ */
+ GLfloat dtc = 2.0f * outerRadius;
+ GLfloat sa, ca;
+ GLfloat r1 = innerRadius;
+ GLint l;
+ for (l = 0; l < loops; l++) {
GLfloat r2 = r1 + dr;
- if (qobj->Orientation==GLU_OUTSIDE) {
- GLint s;
- glBegin( GL_QUAD_STRIP );
- for (s=0;s<=slices;s++) {
- GLfloat a;
- if (s==slices) a = 0.0;
- else a = s * da;
- sa = sin(a); ca = cos(a);
- TXTR_COORD(0.5+sa*r2/dtc,0.5+ca*r2/dtc);
- glVertex2f( r2*sa, r2*ca );
- TXTR_COORD(0.5+sa*r1/dtc,0.5+ca*r1/dtc);
- glVertex2f( r1*sa, r1*ca );
+ if (qobj->Orientation == GLU_OUTSIDE) {
+ GLint s;
+ glBegin(GL_QUAD_STRIP);
+ for (s = 0; s <= slices; s++) {
+ GLfloat a;
+ if (s == slices)
+ a = 0.0;
+ else
+ a = s * da;
+ sa = sin(a);
+ ca = cos(a);
+ TXTR_COORD(0.5 + sa * r2 / dtc, 0.5 + ca * r2 / dtc);
+ glVertex2f(r2 * sa, r2 * ca);
+ TXTR_COORD(0.5 + sa * r1 / dtc, 0.5 + ca * r1 / dtc);
+ glVertex2f(r1 * sa, r1 * ca);
}
glEnd();
}
else {
- GLint s;
- glBegin( GL_QUAD_STRIP );
- for (s=slices;s>=0;s--) {
- GLfloat a;
- if (s==slices) a = 0.0;
- else a = s * da;
- sa = sin(a); ca = cos(a);
- TXTR_COORD(0.5-sa*r2/dtc,0.5+ca*r2/dtc);
- glVertex2f( r2*sa, r2*ca );
- TXTR_COORD(0.5-sa*r1/dtc,0.5+ca*r1/dtc);
- glVertex2f( r1*sa, r1*ca );
+ GLint s;
+ glBegin(GL_QUAD_STRIP);
+ for (s = slices; s >= 0; s--) {
+ GLfloat a;
+ if (s == slices)
+ a = 0.0;
+ else
+ a = s * da;
+ sa = sin(a);
+ ca = cos(a);
+ TXTR_COORD(0.5 - sa * r2 / dtc, 0.5 + ca * r2 / dtc);
+ glVertex2f(r2 * sa, r2 * ca);
+ TXTR_COORD(0.5 - sa * r1 / dtc, 0.5 + ca * r1 / dtc);
+ glVertex2f(r1 * sa, r1 * ca);
}
glEnd();
}
r1 = r2;
}
- break;
+ break;
}
- case GLU_LINE:
+ case GLU_LINE:
{
- GLint l, s;
+ GLint l, s;
/* draw loops */
- for (l=0; l<=loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glBegin( GL_LINE_LOOP );
- for (s=0; s<slices; s++) {
- GLfloat a = s * da;
- glVertex2f( r*sin(a), r*cos(a) );
- }
+ for (l = 0; l <= loops; l++) {
+ GLfloat r = innerRadius + l * dr;
+ glBegin(GL_LINE_LOOP);
+ for (s = 0; s < slices; s++) {
+ GLfloat a = s * da;
+ glVertex2f(r * sin(a), r * cos(a));
+ }
glEnd();
}
/* draw spokes */
- for (s=0; s<slices; s++) {
- GLfloat a = s * da;
+ for (s = 0; s < slices; s++) {
+ GLfloat a = s * da;
GLfloat x = sin(a);
GLfloat y = cos(a);
- glBegin( GL_LINE_STRIP );
- for (l=0; l<=loops; l++) {
- GLfloat r = innerRadius + l * dr;
- glVertex2f( r*x, r*y );
+ glBegin(GL_LINE_STRIP);
+ for (l = 0; l <= loops; l++) {
+ GLfloat r = innerRadius + l * dr;
+ glVertex2f(r * x, r * y);
}
glEnd();
}
break;
}
- case GLU_POINT:
+ case GLU_POINT:
{
- GLint s;
- glBegin( GL_POINTS );
- for (s=0; s<slices; s++) {
- GLfloat a = s * da;
+ GLint s;
+ glBegin(GL_POINTS);
+ for (s = 0; s < slices; s++) {
+ GLfloat a = s * da;
GLfloat x = sin(a);
GLfloat y = cos(a);
- GLint l;
- for (l=0; l<=loops; l++) {
- GLfloat r = innerRadius * l * dr;
- glVertex2f( r*x, r*y );
+ GLint l;
+ for (l = 0; l <= loops; l++) {
+ GLfloat r = innerRadius * l * dr;
+ glVertex2f(r * x, r * y);
}
}
glEnd();
break;
}
- case GLU_SILHOUETTE:
+ case GLU_SILHOUETTE:
{
- if (innerRadius!=0.0) {
- GLfloat a;
- glBegin( GL_LINE_LOOP );
- for (a=0.0; a<2.0*M_PI; a+=da) {
+ if (innerRadius != 0.0) {
+ GLfloat a;
+ glBegin(GL_LINE_LOOP);
+ for (a = 0.0; a < 2.0 * M_PI; a += da) {
GLfloat x = innerRadius * sin(a);
GLfloat y = innerRadius * cos(a);
- glVertex2f( x, y );
+ glVertex2f(x, y);
+ }
+ glEnd();
+ }
+ {
+ GLfloat a;
+ glBegin(GL_LINE_LOOP);
+ for (a = 0; a < 2.0 * M_PI; a += da) {
+ GLfloat x = outerRadius * sin(a);
+ GLfloat y = outerRadius * cos(a);
+ glVertex2f(x, y);
}
glEnd();
}
- {
- GLfloat a;
- glBegin( GL_LINE_LOOP );
- for (a=0; a<2.0*M_PI; a+=da) {
- GLfloat x = outerRadius * sin(a);
- GLfloat y = outerRadius * cos(a);
- glVertex2f( x, y );
- }
- glEnd();
- }
break;
}
- default:
- abort();
+ default:
+ abort();
}
}
-void GLAPIENTRY gluPartialDisk( GLUquadricObj *qobj, GLdouble innerRadius,
- GLdouble outerRadius, GLint slices, GLint loops,
- GLdouble startAngle, GLdouble sweepAngle )
+void GLAPIENTRY
+gluPartialDisk(GLUquadricObj * qobj, GLdouble innerRadius,
+ GLdouble outerRadius, GLint slices, GLint loops,
+ GLdouble startAngle, GLdouble sweepAngle)
{
- if (qobj->Normals!=GLU_NONE) {
- if (qobj->Orientation==GLU_OUTSIDE) {
- glNormal3f( 0.0, 0.0, +1.0 );
+ if (qobj->Normals != GLU_NONE) {
+ if (qobj->Orientation == GLU_OUTSIDE) {
+ glNormal3f(0.0, 0.0, +1.0);
}
else {
- glNormal3f( 0.0, 0.0, -1.0 );
+ glNormal3f(0.0, 0.0, -1.0);
}
}
- if (qobj->DrawStyle==GLU_POINT) {
+ if (qobj->DrawStyle == GLU_POINT) {
GLint loop, slice;
GLdouble radius, delta_radius;
GLdouble angle, delta_angle;
- delta_radius = (outerRadius - innerRadius) / (loops-1);
- delta_angle = DEG_TO_RAD((sweepAngle) / (slices-1));
- glBegin( GL_POINTS );
+ delta_radius = (outerRadius - innerRadius) / (loops - 1);
+ delta_angle = DEG_TO_RAD((sweepAngle) / (slices - 1));
+ glBegin(GL_POINTS);
radius = innerRadius;
- for (loop=0; loop<loops; loop++) {
+ for (loop = 0; loop < loops; loop++) {
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<slices; slice++) {
- glVertex2d( radius * sin(angle), radius * cos(angle) );
+ for (slice = 0; slice < slices; slice++) {
+ glVertex2d(radius * sin(angle), radius * cos(angle));
angle += delta_angle;
}
radius += delta_radius;
}
glEnd();
}
- else if (qobj->DrawStyle==GLU_LINE) {
+ else if (qobj->DrawStyle == GLU_LINE) {
GLint loop, slice;
GLdouble radius, delta_radius;
GLdouble angle, delta_angle;
delta_angle = DEG_TO_RAD(sweepAngle / slices);
/* draw rings */
radius = innerRadius;
- for (loop=0; loop<loops; loop++) {
+ for (loop = 0; loop < loops; loop++) {
angle = DEG_TO_RAD(startAngle);
- glBegin( GL_LINE_STRIP );
- for (slice=0; slice<=slices; slice++) {
- glVertex2d( radius * sin(angle), radius * cos(angle) );
+ glBegin(GL_LINE_STRIP);
+ for (slice = 0; slice <= slices; slice++) {
+ glVertex2d(radius * sin(angle), radius * cos(angle));
angle += delta_angle;
}
glEnd();
}
/* draw spokes */
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<=slices; slice++) {
+ for (slice = 0; slice <= slices; slice++) {
radius = innerRadius;
- glBegin( GL_LINE_STRIP );
- for (loop=0; loop<loops; loop++) {
- glVertex2d( radius * sin(angle), radius * cos(angle) );
+ glBegin(GL_LINE_STRIP);
+ for (loop = 0; loop < loops; loop++) {
+ glVertex2d(radius * sin(angle), radius * cos(angle));
radius += delta_radius;
}
glEnd();
angle += delta_angle;
}
}
- else if (qobj->DrawStyle==GLU_SILHOUETTE) {
+ else if (qobj->DrawStyle == GLU_SILHOUETTE) {
GLint slice;
GLdouble angle, delta_angle;
delta_angle = DEG_TO_RAD(sweepAngle / slices);
/* draw outer ring */
- glBegin( GL_LINE_STRIP );
+ glBegin(GL_LINE_STRIP);
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<=slices; slice++) {
- glVertex2d( outerRadius * sin(angle), outerRadius * cos(angle) );
+ for (slice = 0; slice <= slices; slice++) {
+ glVertex2d(outerRadius * sin(angle), outerRadius * cos(angle));
angle += delta_angle;
}
glEnd();
/* draw inner ring */
- if (innerRadius>0.0) {
- glBegin( GL_LINE_STRIP );
+ if (innerRadius > 0.0) {
+ glBegin(GL_LINE_STRIP);
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<slices; slice++) {
- glVertex2d( innerRadius * sin(angle), innerRadius * cos(angle) );
+ for (slice = 0; slice < slices; slice++) {
+ glVertex2d(innerRadius * sin(angle), innerRadius * cos(angle));
angle += delta_angle;
}
glEnd();
}
/* draw spokes */
- if (sweepAngle<360.0) {
+ if (sweepAngle < 360.0) {
GLdouble stopAngle = startAngle + sweepAngle;
- glBegin( GL_LINES );
- glVertex2d( innerRadius*SIND(startAngle), innerRadius*COSD(startAngle) );
- glVertex2d( outerRadius*SIND(startAngle), outerRadius*COSD(startAngle) );
- glVertex2d( innerRadius*SIND(stopAngle), innerRadius*COSD(stopAngle) );
- glVertex2d( outerRadius*SIND(stopAngle), outerRadius*COSD(stopAngle) );
+ glBegin(GL_LINES);
+ glVertex2d(innerRadius * SIND(startAngle),
+ innerRadius * COSD(startAngle));
+ glVertex2d(outerRadius * SIND(startAngle),
+ outerRadius * COSD(startAngle));
+ glVertex2d(innerRadius * SIND(stopAngle),
+ innerRadius * COSD(stopAngle));
+ glVertex2d(outerRadius * SIND(stopAngle),
+ outerRadius * COSD(stopAngle));
glEnd();
}
}
- else if (qobj->DrawStyle==GLU_FILL) {
+ else if (qobj->DrawStyle == GLU_FILL) {
GLint loop, slice;
GLdouble radius, delta_radius;
GLdouble angle, delta_angle;
delta_radius = (outerRadius - innerRadius) / loops;
delta_angle = DEG_TO_RAD(sweepAngle / slices);
radius = innerRadius;
- for (loop=0; loop<loops; loop++) {
- glBegin( GL_QUAD_STRIP );
+ for (loop = 0; loop < loops; loop++) {
+ glBegin(GL_QUAD_STRIP);
angle = DEG_TO_RAD(startAngle);
- for (slice=0; slice<=slices; slice++) {
- if (qobj->Orientation==GLU_OUTSIDE) {
- glVertex2d( (radius+delta_radius)*sin(angle),
- (radius+delta_radius)*cos(angle) );
- glVertex2d( radius * sin(angle), radius * cos(angle) );
+ for (slice = 0; slice <= slices; slice++) {
+ if (qobj->Orientation == GLU_OUTSIDE) {
+ glVertex2d((radius + delta_radius) * sin(angle),
+ (radius + delta_radius) * cos(angle));
+ glVertex2d(radius * sin(angle), radius * cos(angle));
}
else {
- glVertex2d( radius * sin(angle), radius * cos(angle) );
- glVertex2d( (radius+delta_radius)*sin(angle),
- (radius+delta_radius)*cos(angle) );
+ glVertex2d(radius * sin(angle), radius * cos(angle));
+ glVertex2d((radius + delta_radius) * sin(angle),
+ (radius + delta_radius) * cos(angle));
}
angle += delta_angle;
}
}
}
}
-
-
-
-/* $Id: tess.c,v 1.24 2000/02/10 17:45:52 brianp Exp $ */
+/* $Id: tess.c,v 1.25 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
- * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
*
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
*
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/*****************************************************************************
- *
- * GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@bell-labs.com>
- *
- *****************************************************************************/
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
-#include "gluP.h"
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <math.h>
+#include <stdlib.h>
#include "tess.h"
-#include "tess_macros.h"
-#include "tess_fist.h"
-#if 0
-#include "tess_grid.h"
#endif
-#define TESS_CHECK_ERRORS(t) if ( (t)->error != GLU_NO_ERROR ) goto cleanup
-
-#ifdef DEBUG
-GLint tess_dbg_level;
-#endif
-
-
-/*****************************************************************************
- * tess_error_callback
- *
- * Internal error handler. Call the user-registered error callback.
- *
- * 2nd arg changed from 'errno' to 'errnum' since MSVC defines errnum as
- * a macro (of all things) and thus breaks the build -tjump
- *****************************************************************************/
-void tess_error_callback( GLUtesselator *tobj, GLenum errnum )
-{
- if ( tobj->error == GLU_NO_ERROR )
- {
- tobj->error = errnum;
- }
-
- if ( tobj->callbacks.errorData != NULL )
- {
- ( tobj->callbacks.errorData )( errnum, tobj->data );
- }
- else if ( tobj->callbacks.error != NULL )
- {
- ( tobj->callbacks.error )( errnum );
- }
-}
-
-
-/*****************************************************************************
- * init_callbacks
- *****************************************************************************/
-static void init_callbacks( tess_callbacks_t *callbacks )
-{
- callbacks->begin = ( void (GLCALLBACKPCAST)(GLenum) ) NULL;
- callbacks->beginData = ( void (GLCALLBACKPCAST)(GLenum, void *) ) NULL;
- callbacks->edgeFlag = ( void (GLCALLBACKPCAST)(GLboolean) ) NULL;
- callbacks->edgeFlagData = ( void (GLCALLBACKPCAST)(GLboolean, void *) ) NULL;
- callbacks->vertex = ( void (GLCALLBACKPCAST)(void *) ) NULL;
- callbacks->vertexData = ( void (GLCALLBACKPCAST)(void *, void *) ) NULL;
- callbacks->end = ( void (GLCALLBACKPCAST)(void) ) NULL;
- callbacks->endData = ( void (GLCALLBACKPCAST)(void *) ) NULL;
- callbacks->error = ( void (GLCALLBACKPCAST)(GLenum) ) NULL;
- callbacks->errorData = ( void (GLCALLBACKPCAST)(GLenum, void *) ) NULL;
- callbacks->combine = ( void (GLCALLBACKPCAST)(GLdouble [3], void *[4],
- GLfloat [4], void **) ) NULL;
- callbacks->combineData = ( void (GLCALLBACKPCAST)(GLdouble [3], void *[4],
- GLfloat [4], void **,
- void *) ) NULL;
-}
-
-
-/*****************************************************************************
- * find_normal
- *****************************************************************************/
-static GLenum find_normal( GLUtesselator *tobj )
-{
- tess_contour_t *contour = tobj->current_contour;
- tess_vertex_t *va, *vb, *vc;
- GLdouble a[3], b[3], c[3];
-
- MSG( 15, " --> find_normal( tobj:%p )\n", tobj );
-
- if ( contour == NULL ) { return GLU_ERROR; }
-
- va = contour->vertices;
- vb = va->next;
-
- /* If va and vb are the same point, keep looking for a different vertex. */
-
- while ( IS_EQUAL_3DV( va->coords, vb->coords ) && ( vb != va ) ) {
- vb = vb->next;
- }
-
- if ( vb == va ) {
- /* FIXME: What error is this? */
- tess_error_callback( tobj, GLU_TESS_ERROR7 );
- }
-
- SUB_3V( a, vb->coords, va->coords );
-
- for ( vc = vb->next; vc != va; vc = vc->next )
- {
- SUB_3V( b, vc->coords, va->coords );
-
- CROSS_3V( c, a, b );
-
- if ( ! IS_ZERO_3DV( c ) )
- {
- MSG( 15, " using (%.2f,%.2f) -> (%.2f,%.2f) -> (%.2f,%.2f)\n",
- va->coords[X], va->coords[Y],
- vb->coords[X], vb->coords[Y],
- vc->coords[X], vc->coords[Y] );
-
- COPY_3V( contour->plane.normal, c );
- NORMALIZE_3DV( contour->plane.normal );
-
- contour->plane.dist = - DOT_3V( contour->plane.normal,
- va->coords );
-
- MSG( 15, " <-- find_normal( tobj:%p ) n: (%.2f, %.2f, %.2f)\n", tobj, contour->plane.normal[X], contour->plane.normal[Y], contour->plane.normal[Z] );
- return GLU_NO_ERROR;
- }
- }
- /* FIXME: What error is this? */
- tess_error_callback( tobj, GLU_TESS_ERROR7 );
-
- return GLU_ERROR;
-}
-
-/*****************************************************************************
- * twice_contour_area
- *
- * Calculate the twice the signed area of the given contour. Used to
- * determine the contour's orientation amongst other things.
- *****************************************************************************/
-GLdouble twice_contour_area( tess_contour_t *contour )
-{
- tess_vertex_t *vertex = contour->vertices;
- GLdouble area, x, y;
-
- area = 0.0;
-
- x = vertex->v[X];
- y = vertex->v[Y];
-
- vertex = vertex->next;
-
- do
- {
- area += ( (vertex->v[X] - x) * (vertex->next->v[Y] - y) -
- (vertex->v[Y] - y) * (vertex->next->v[X] - x) );
- vertex = vertex->next;
- }
- while ( vertex != contour->vertices );
-
- return area;
-}
-
-/*****************************************************************************
- * project_current_contour
- *
- * Project the contour's vertices onto the tessellation plane. We perform
- * a complex rotation here to allow non-axis-aligned tessellation normals.
- *****************************************************************************/
-static void project_current_contour( GLUtesselator *tobj )
-{
- tess_contour_t *current = tobj->current_contour;
- tess_vertex_t *vertex;
- GLdouble zaxis[3] = { 0.0, 0.0, 1.0 }, znormal[3], xnormal[3];
- GLdouble dot, rotx, roty;
- GLint i;
-
- MSG( 15, " --> project_current_contour( tobj:%p )\n", tobj );
-
- if ( current == NULL ) { return; }
-
- /* Rotate the plane normal around the y-axis. */
-
- znormal[X] = current->plane.normal[X];
- znormal[Y] = 0.0;
- znormal[Z] = current->plane.normal[Z];
-
- dot = DOT_3V( znormal, zaxis );
- current->roty = roty = acos( dot );
-
- /* Rotate the plane normal around the x-axis. */
-
- xnormal[X] = cos( roty ) * znormal[X] - sin( roty ) * znormal[Z];
- xnormal[Y] = znormal[Y];
- xnormal[Z] = sin( roty ) * znormal[X] + cos( roty ) * znormal[Z];
-
- dot = DOT_3V( xnormal, zaxis );
- current->rotx = rotx = acos( dot );
-
- for ( vertex = current->vertices, i = 0;
- i < current->num_vertices; vertex = vertex->next, i++ )
- {
- tess_plane_t *plane = ¤t->plane;
- GLdouble proj[3], yrot[3], xrot[3];
-
- /* FIXME: This needs a cleanup, 'cos I'm sure it's inefficient. */
-
- proj[X] = vertex->coords[X] - plane->dist * plane->normal[X];
- proj[Y] = vertex->coords[Y] - plane->dist * plane->normal[Y];
- proj[Z] = vertex->coords[Z] - plane->dist * plane->normal[Z];
-
- yrot[X] = cos( roty ) * proj[X] - sin( roty ) * proj[Z];
- yrot[Y] = proj[Y];
- yrot[Z] = sin( roty ) * proj[X] + cos( roty ) * proj[Z];
-
- xrot[X] = yrot[X];
- xrot[Y] = cos( rotx ) * yrot[Y] - sin( rotx ) * yrot[Z];
- xrot[Z] = sin( rotx ) * yrot[Y] + cos( rotx ) * yrot[Z];
-
- vertex->v[X] = xrot[X];
- vertex->v[Y] = xrot[Y];
-
- ACC_BBOX_2V( vertex->v, tobj->mins, tobj->maxs );
- ACC_BBOX_2V( vertex->v, current->mins, current->maxs );
- }
-
- current->area = twice_contour_area( current );
- current->orientation = ( current->area >= 0.0 ) ? GLU_CCW : GLU_CW;
-
- MSG( 15, " area: %.2f orientation: %s\n",
- current->area, ( current->orientation == GLU_CCW ) ? "CCW" : "CW" );
-
- MSG( 15, " <-- project_current_contour( tobj:%p )\n", tobj );
-}
-
-/*****************************************************************************
- * save_current_contour
- *****************************************************************************/
-static GLenum save_current_contour( GLUtesselator *tobj )
-{
- tess_contour_t *current = tobj->current_contour;
- tess_vertex_t *vertex;
- GLint i;
-
- if ( current == NULL ) { return GLU_ERROR; }
-
- if ( tobj->contours == NULL )
- {
- tobj->contours = tobj->last_contour = current;
- current->next = current->prev = NULL;
-
- tobj->orientation = current->orientation;
- }
- else
- {
- current->prev = tobj->last_contour;
-
- tobj->last_contour->next = current;
- tobj->last_contour = current;
-
- current->next = NULL;
- }
-
- for ( vertex = current->vertices, i = 0;
- i < current->num_vertices; vertex = vertex->next, i++ )
- {
- vertex->edge_flag = GL_TRUE;
- }
-
- current->type = GLU_UNKNOWN;
-
- tobj->num_contours++;
- tobj->current_contour = NULL;
-
- return GLU_NO_ERROR;
-}
-
-/*****************************************************************************
- * inspect_current_contour
- *****************************************************************************/
-static void inspect_current_contour( GLUtesselator *tobj )
-{
- tess_contour_t *current = tobj->current_contour;
- GLdouble origin[3] = { 0.0, 0.0, 0.0 };
- GLboolean calc_normal = GL_FALSE;
-
- MSG( 15, " --> inspect_current_contour( tobj:%p )\n", tobj );
-
- if ( current->num_vertices < 3 )
- {
- MSG( 15, " count %d < 3, deleting\n", current->num_vertices );
- delete_contour( &tobj->current_contour );
- return;
- }
-
- current->last_vertex->next = current->vertices;
- current->vertices->prev = current->last_vertex;
-
- MSG( 15, " current normal: (%.2f, %.2f, %.2f)\n", current->plane.normal[X], current->plane.normal[Y], current->plane.normal[Z] );
-
- if ( IS_EQUAL_3DV( current->plane.normal, origin ) )
- {
- /* We haven't been given a normal, so let's take a guess. */
- if ( find_normal( tobj ) == GLU_ERROR ) {
- return;
- }
-
- COPY_3V( tobj->plane.normal, current->plane.normal );
- tobj->plane.dist = current->plane.dist;
-
- calc_normal = GL_TRUE;
- }
-
- project_current_contour( tobj );
-
- if ( calc_normal && ( tobj->current_contour->orientation == GLU_CW ) )
- {
- MSG( 15, " oops, let's try that again...\n" );
-
- /*
- * FIXME: We've used a reflex angle to calculate the normal. At
- * the moment, we simply reverse the normal and re-project the
- * contour, but this is sloooow...
- */
- NEG_3V( tobj->plane.normal );
- NEG_3V( tobj->current_contour->plane.normal );
-
- project_current_contour( tobj );
- }
-
- if ( save_current_contour( tobj ) == GLU_ERROR ) {
- return;
- }
-
- MSG( 15, " <-- inspect_current_contour( tobj:%p )\n", tobj );
-}
-
-/*****************************************************************************
- * reverse_contour
- *****************************************************************************/
-void reverse_contour( tess_contour_t *contour )
-{
- tess_vertex_t *current = contour->vertices;
- GLint i;
-
- for ( i = 0 ; i < contour->num_vertices ; i++ )
- {
- tess_vertex_t *next = current->next;
- tess_vertex_t *prev = current->prev;
-
- current->next = prev;
- current->prev = next;
-
- current = next;
- }
-
- contour->orientation =
- ( contour->orientation == GLU_CCW ) ? GLU_CW : GLU_CCW;
-
- contour->last_vertex = contour->vertices->prev;
-}
-
-/*****************************************************************************
- * orient_contours
- *
- * Sum the signed areas of the contours, and orient the contours such that
- * this sum is nonnegative.
- *****************************************************************************/
-static void orient_contours( GLUtesselator *tobj )
-{
- tess_contour_t *contour = tobj->contours;
- GLdouble sum = 0.0;
- GLint i;
-
- MSG( 15, " --> orient_contours( tobj:%p )\n", tobj );
-
- /* Sum the signed areas of all contours */
- for ( i = 0 ; i < tobj->num_contours ; i++ )
- {
- sum += contour->area;
- contour = contour->next;
- }
-
- MSG( 15, " signed area: %.2f\n", sum );
-
- if ( sum < -GLU_TESS_EPSILON )
- {
- for ( i = 0 ; i < tobj->num_contours ; i++ )
- {
- contour->area = ABSD( contour->area );
- reverse_contour( contour );
-
- contour = contour->next;
- }
- }
- else
- {
- for ( i = 0 ; i < tobj->num_contours ; i++ )
- {
- contour->area = ABSD( contour->area );
-
- contour = contour->next;
- }
- }
-
- tobj->orientation = tobj->contours->orientation;
-
- MSG( 15, " <-- orient_contours( tobj:%p ) orient: %s\n",
- tobj, ( tobj->orientation == GLU_CCW ) ? "GLU_CCW" : "GLU_CW" );
-}
-
-
-/*****************************************************************************
- * delete_contour
- *
- * Delete the given contour and set the pointer to NULL.
- *****************************************************************************/
-void delete_contour( tess_contour_t **contour )
-{
- tess_vertex_t *vertex, *next;
- GLint i;
-
- if ( *contour == NULL ) { return; }
-
- vertex = (*contour)->vertices;
-
- for ( i = 0 ; i < (*contour)->num_vertices ; i++ )
- {
- next = vertex->next;
- free( vertex );
- vertex = next;
- }
-
- free( *contour );
- *contour = NULL;
-}
-
-/*****************************************************************************
- * delete_all_contours
- *****************************************************************************/
-static void delete_all_contours( GLUtesselator *tobj )
-{
- tess_contour_t *current, *next_contour;
- GLint i;
-
- if ( tobj->current_contour != NULL ) {
- delete_contour( &tobj->current_contour );
- }
-
- for ( current = tobj->contours, i = 0 ; i < tobj->num_contours ; i++ )
- {
- tess_vertex_t *vertex = current->vertices, *next_vertex;
- GLint j;
-
- for ( j = 0 ; j < current->num_vertices ; j ++ )
- {
- next_vertex = vertex->next;
- free( vertex );
- vertex = next_vertex;
- }
- next_contour = current->next;
-
- free( current );
- current = next_contour;
- }
-
- tobj->num_contours = tobj->num_vertices = 0;
- tobj->contours = tobj->last_contour = NULL;
-
- CLEAR_BBOX_2DV( tobj->mins, tobj->maxs );
-}
-
-
-/*****************************************************************************
- * tess_cleanup
- *****************************************************************************/
-static void tess_cleanup( GLUtesselator *tobj )
-{
- MSG( 15, " -> tess_cleanup( tobj:%p )\n", tobj );
-
- if ( tobj->current_contour != NULL ) {
- delete_contour( &tobj->current_contour );
- }
- if ( tobj->contours != NULL ) {
- delete_all_contours( tobj );
- }
-
- MSG( 15, " <- tess_cleanup( tobj:%p )\n", tobj );
-}
-
-
-/*****************************************************************************
- * tess_msg
- *****************************************************************************/
-INLINE void tess_msg( GLint level, char *format, ... )
-{
-#ifdef DEBUG
- va_list ap;
- va_start( ap, format );
-
- if ( level <= tess_dbg_level ) {
- vfprintf( DBG_STREAM, format, ap );
- fflush( DBG_STREAM );
- }
-
- va_end( ap );
-#endif
-}
-
-INLINE void tess_info( char *file, GLint line )
-{
-#ifdef DEBUG
- fprintf( DBG_STREAM, "%9.9s:%d:\t ", file, line );
-#endif
-}
-
-
-
-/*****************************************************************************
- *
- * GLU TESSELLATION FUNCTIONS
- *
- *****************************************************************************/
-
-
-/*****************************************************************************
- * gluNewTess
- *****************************************************************************/
-GLUtesselator* GLAPIENTRY gluNewTess( void )
-{
- GLUtesselator *tobj;
-
-#ifdef DEBUG
- if ( getenv( "MESA_TESS_DBG_LEVEL" ) ) {
- tess_dbg_level = atoi( getenv( "MESA_TESS_DBG_LEVEL" ) );
- } else {
- tess_dbg_level = DBG_LEVEL_BASE;
- }
+/*
+ * This is ugly, but seems the easiest way to do things to make the
+ * code work under YellowBox for Windows
+ */
+#if defined(OPENSTEP) && defined(CALLBACK)
+#undef CALLBACK
+#define CALLBACK
#endif
- MSG( 15, "-> gluNewTess()\n" );
-
- tobj = malloc( sizeof(GLUtesselator) );
- if ( tobj == NULL ) {
- return NULL;
- }
-
- init_callbacks( &tobj->callbacks );
-
- tobj->winding_rule = GLU_TESS_WINDING_ODD;
- tobj->boundary_only = GL_FALSE;
- tobj->tolerance = GLU_TESS_EPSILON;
- tobj->orientation = GLU_UNKNOWN;
-
- tobj->data = NULL;
- tobj->num_contours = 0;
- tobj->contours = tobj->last_contour = NULL;
- tobj->current_contour = NULL;
+static void delete_contours(GLUtriangulatorObj *);
- CLEAR_BBOX_2DV( tobj->mins, tobj->maxs );
-
- tobj->num_vertices = 0;
- tobj->sorted_vertices = NULL;
-#if 0
- tobj->grid = NULL;
+#ifdef __CYGWIN32__
+#define _CALLBACK
+#else
+#define _CALLBACK GLCALLBACK
#endif
- tobj->edge_flag = GL_FALSE;
- tobj->label = 0;
-
- ZERO_3V( tobj->plane.normal );
- tobj->plane.dist = 0.0;
-
- tobj->error = GLU_NO_ERROR;
-
- MSG( 15, "<- gluNewTess() tobj:%p\n", tobj );
- return tobj;
-}
-
-
-/*****************************************************************************
- * gluDeleteTess
- *****************************************************************************/
-void GLAPIENTRY gluDeleteTess( GLUtesselator *tobj )
-{
- MSG( 15, "-> gluDeleteTess( tobj:%p )\n", tobj );
- if ( ( tobj->error == GLU_NO_ERROR ) && ( tobj->num_contours > 0 ) )
- {
- /* gluEndPolygon was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR3 );
- }
- /* Delete all internal structures. */
- tess_cleanup( tobj );
- free( tobj );
-
- MSG( 15, "<- gluDeleteTess()\n" );
-}
-
-
-/*****************************************************************************
- * gluTessBeginPolygon
- *****************************************************************************/
-void GLAPIENTRY gluTessBeginPolygon( GLUtesselator *tobj, void *polygon_data )
+static void
+init_callbacks(tess_callbacks * callbacks)
{
- MSG( 15, "-> gluTessBeginPolygon( tobj:%p data:%p )\n", tobj, polygon_data );
-
- tobj->error = GLU_NO_ERROR;
-
- if ( tobj->current_contour != NULL )
- {
- /* gluEndPolygon was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR3 );
- tess_cleanup( tobj );
- }
-
- tobj->data = polygon_data;
- tobj->num_vertices = 0;
- tobj->edge_flag = GL_FALSE;
- tobj->label = 0;
-
- MSG( 15, "<- gluTessBeginPolygon( tobj:%p data:%p )\n", tobj, polygon_data );
+ callbacks->begin = (void (_CALLBACK *) (GLenum)) 0;
+ callbacks->edgeFlag = (void (_CALLBACK *) (GLboolean)) 0;
+ callbacks->vertex = (void (_CALLBACK *) (void *)) 0;
+ callbacks->end = (void (_CALLBACK *) (void)) 0;
+ callbacks->error = (void (_CALLBACK *) (GLenum)) 0;
}
-
-/*****************************************************************************
- * gluTessBeginContour
- *****************************************************************************/
-void GLAPIENTRY gluTessBeginContour( GLUtesselator *tobj )
+void
+tess_call_user_error(GLUtriangulatorObj * tobj, GLenum gluerr)
{
- MSG( 15, " -> gluTessBeginContour( tobj:%p )\n", tobj );
- TESS_CHECK_ERRORS( tobj );
-
- if ( tobj->current_contour != NULL )
- {
- /* gluTessEndContour was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR4 );
- return;
- }
-
- tobj->current_contour = malloc( sizeof(tess_contour_t) );
- if ( tobj->current_contour == NULL ) {
- tess_error_callback( tobj, GLU_OUT_OF_MEMORY );
- return;
- }
-
- COPY_3V( tobj->current_contour->plane.normal, tobj->plane.normal );
- tobj->current_contour->plane.dist = tobj->plane.dist;
-
- tobj->current_contour->area = 0.0;
- tobj->current_contour->orientation = GLU_UNKNOWN;
-
- tobj->current_contour->label = 0;
- tobj->current_contour->winding = 0;
-
- /*tobj->current_contour->rotx = tobj->current_contour->roty = 0.0;*/
-
- CLEAR_BBOX_2DV( tobj->current_contour->mins,
- tobj->current_contour->maxs );
-
- tobj->current_contour->num_vertices = 0;
- tobj->current_contour->vertices =
- tobj->current_contour->last_vertex = NULL;
-
- tobj->current_contour->reflex_vertices = NULL;
-
- cleanup:
- MSG( 15, " <- gluTessBeginContour( tobj:%p )\n", tobj );
- return;
+ if (tobj->error == GLU_NO_ERROR)
+ tobj->error = gluerr;
+ if (tobj->callbacks.error != NULL)
+ (tobj->callbacks.error) (gluerr);
}
-
-/*****************************************************************************
- * gluTessVertex
- *****************************************************************************/
-void GLAPIENTRY gluTessVertex( GLUtesselator *tobj, GLdouble coords[3],
- void *vertex_data )
+GLUtriangulatorObj *GLAPIENTRY
+gluNewTess(void)
{
- tess_contour_t *current = tobj->current_contour;
- tess_vertex_t *last_vertex;
-
- MSG( 15, " -> gluTessVertex( tobj:%p coords:(%.2f,%.2f,%.2f) )\n", tobj, coords[0], coords[1], coords[2] );
- TESS_CHECK_ERRORS( tobj );
-
- if ( current == NULL )
- {
- /* gluTessBeginContour was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR2 );
- return;
- }
-
- tobj->num_vertices++;
-
- last_vertex = current->last_vertex;
-
- if ( last_vertex == NULL )
- {
- last_vertex = malloc( sizeof(tess_vertex_t) );
- if ( last_vertex == NULL ) {
- tess_error_callback( tobj, GLU_OUT_OF_MEMORY );
- return;
- }
-
- current->vertices = last_vertex;
- current->last_vertex = last_vertex;
-
- last_vertex->index = -1;
- last_vertex->data = vertex_data;
-
- last_vertex->coords[X] = coords[X];
- last_vertex->coords[Y] = coords[Y];
- last_vertex->coords[Z] = coords[Z];
-
- last_vertex->v[X] = 0.0;
- last_vertex->v[Y] = 0.0;
-
- last_vertex->edge_flag = GL_TRUE;
-
- last_vertex->side = 0.0;
-
- last_vertex->next = NULL;
- last_vertex->prev = NULL;
-
- current->num_vertices++;
- }
- else
- {
- tess_vertex_t *vertex;
-
- vertex = malloc( sizeof(tess_vertex_t) );
- if ( vertex == NULL ) {
- tess_error_callback( tobj, GLU_OUT_OF_MEMORY );
- return;
- }
-
- vertex->index = -1;
- vertex->data = vertex_data;
-
- vertex->coords[X] = coords[X];
- vertex->coords[Y] = coords[Y];
- vertex->coords[Z] = coords[Z];
-
- vertex->v[X] = 0.0;
- vertex->v[Y] = 0.0;
-
- vertex->edge_flag = GL_TRUE;
-
- vertex->side = 0.0;
-
- vertex->next = NULL;
- vertex->prev = last_vertex;
-
- current->num_vertices++;
-
- last_vertex->next = vertex;
- current->last_vertex = vertex;
- }
-
- cleanup:
- MSG( 15, " <- gluTessVertex( tobj:%p )\n", tobj );
- return;
+ GLUtriangulatorObj *tobj;
+
+ if ((tobj = (GLUtriangulatorObj *)
+ malloc(sizeof(struct GLUtriangulatorObj))) == NULL)
+ return NULL;
+ tobj->contours = tobj->last_contour = NULL;
+ init_callbacks(&tobj->callbacks);
+ tobj->error = GLU_NO_ERROR;
+ tobj->current_polygon = NULL;
+ tobj->contour_cnt = 0;
+ return tobj;
}
-/*****************************************************************************
- * gluTessEndContour
- *****************************************************************************/
-void GLAPIENTRY gluTessEndContour( GLUtesselator *tobj )
+void GLAPIENTRY
+gluTessCallback(GLUtriangulatorObj * tobj, GLenum which,
+ void (GLCALLBACK * fn) ())
{
- MSG( 15, " -> gluTessEndContour( tobj:%p )\n", tobj );
- TESS_CHECK_ERRORS( tobj );
-
- if ( tobj->current_contour == NULL )
- {
- /* gluTessBeginContour was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR2 );
- return;
- }
-
- if ( tobj->current_contour->num_vertices > 0 ) {
- inspect_current_contour( tobj );
- } else {
- delete_contour( &tobj->current_contour );
- }
-
- cleanup:
- MSG( 15, " <- gluTessEndContour( tobj:%p )\n", tobj );
- return;
+ switch (which) {
+ case GLU_BEGIN:
+ tobj->callbacks.begin = (void (_CALLBACK *) (GLenum)) fn;
+ break;
+ case GLU_EDGE_FLAG:
+ tobj->callbacks.edgeFlag = (void (_CALLBACK *) (GLboolean)) fn;
+ break;
+ case GLU_VERTEX:
+ tobj->callbacks.vertex = (void (_CALLBACK *) (void *)) fn;
+ break;
+ case GLU_END:
+ tobj->callbacks.end = (void (_CALLBACK *) (void)) fn;
+ break;
+ case GLU_ERROR:
+ tobj->callbacks.error = (void (_CALLBACK *) (GLenum)) fn;
+ break;
+ default:
+ tobj->error = GLU_INVALID_ENUM;
+ break;
+ }
}
-/*****************************************************************************
- * gluTessEndPolygon
- *****************************************************************************/
-void GLAPIENTRY gluTessEndPolygon( GLUtesselator *tobj )
-{
- MSG( 15, "-> gluTessEndPolygon( tobj:%p )\n", tobj );
- TESS_CHECK_ERRORS( tobj );
-
- if ( tobj->current_contour != NULL )
- {
- /* gluTessBeginPolygon was not called. */
- tess_error_callback( tobj, GLU_TESS_ERROR1 );
- return;
- }
- TESS_CHECK_ERRORS( tobj );
-
- /*
- * Ensure we have at least one contour to tessellate. If we have none,
- * clean up and exit gracefully.
- */
- if ( tobj->num_contours == 0 ) {
- tess_cleanup( tobj );
- return;
- }
-
- /* Wrap the contour list. */
-
- tobj->last_contour->next = tobj->contours;
- tobj->contours->prev = tobj->last_contour;
-
- TESS_CHECK_ERRORS( tobj );
-
- /* Orient the contours correctly */
- orient_contours( tobj );
-
- /*
- * Before we tessellate the contours, ensure we have the appropriate
- * callbacks registered. We at least need the begin, vertex and end
- * callbacks to do any meaningful work.
- */
- if ( ( ( tobj->callbacks.begin != NULL ) ||
- ( tobj->callbacks.beginData != NULL ) ) &&
- ( ( tobj->callbacks.vertex != NULL ) ||
- ( tobj->callbacks.vertexData != NULL ) ) &&
- ( ( tobj->callbacks.end != NULL ) ||
- ( tobj->callbacks.endData != NULL ) ) )
- {
- fist_tessellation( tobj );
- }
-
- cleanup:
- delete_all_contours( tobj );
- MSG( 15, "<- gluTessEndPolygon( tobj:%p )\n", tobj );
-}
-
-/*****************************************************************************
- * gluTessCallback
- *****************************************************************************/
-void GLAPIENTRY gluTessCallback( GLUtesselator *tobj, GLenum which,
- void (GLCALLBACKP fn)() )
+void GLAPIENTRY
+gluDeleteTess(GLUtriangulatorObj * tobj)
{
- switch ( which )
- {
- /* Register the begin callbacks. */
- case GLU_TESS_BEGIN:
- tobj->callbacks.begin = (void (GLCALLBACKPCAST)(GLenum)) fn;
- break;
- case GLU_TESS_BEGIN_DATA:
- tobj->callbacks.beginData = (void (GLCALLBACKPCAST)(GLenum, void *)) fn;
- break;
-
- /* Register the edge flag callbacks. */
- case GLU_TESS_EDGE_FLAG:
- tobj->callbacks.edgeFlag = (void (GLCALLBACKPCAST)(GLboolean)) fn;
- break;
- case GLU_TESS_EDGE_FLAG_DATA:
- tobj->callbacks.edgeFlagData = (void (GLCALLBACKPCAST)(GLboolean, void *)) fn;
- break;
-
- /* Register the vertex callbacks. */
- case GLU_TESS_VERTEX:
- tobj->callbacks.vertex = (void (GLCALLBACKPCAST)(void *)) fn;
- break;
- case GLU_TESS_VERTEX_DATA:
- tobj->callbacks.vertexData = (void (GLCALLBACKPCAST)(void *, void *)) fn;
- break;
-
- /* Register the end callbacks. */
- case GLU_TESS_END:
- tobj->callbacks.end = (void (GLCALLBACKPCAST)(void)) fn;
- break;
- case GLU_TESS_END_DATA:
- tobj->callbacks.endData = (void (GLCALLBACKPCAST)(void *)) fn;
- break;
-
- /* Register the error callbacks. */
- case GLU_TESS_ERROR:
- tobj->callbacks.error = (void (GLCALLBACKPCAST)(GLenum)) fn;
- break;
- case GLU_TESS_ERROR_DATA:
- tobj->callbacks.errorData = (void (GLCALLBACKPCAST)(GLenum, void *)) fn;
- break;
-
- /* Register the combine callbacks. */
- case GLU_TESS_COMBINE:
- tobj->callbacks.combine = (void (GLCALLBACKPCAST)(GLdouble[3], void *[4], GLfloat [4], void **)) fn;
- break;
- case GLU_TESS_COMBINE_DATA:
- tobj->callbacks.combineData = (void (GLCALLBACKPCAST)(GLdouble[3], void *[4], GLfloat [4], void **, void *)) fn;
- break;
-
- default:
- MSG( 1, " gluTessCallback( tobj:%p which:%d ) invalid enum\n", tobj, which );
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
+ if (tobj->error == GLU_NO_ERROR && tobj->contour_cnt)
+ /* was gluEndPolygon called? */
+ tess_call_user_error(tobj, GLU_TESS_ERROR1);
+ /* delete all internal structures */
+ delete_contours(tobj);
+ free(tobj);
}
-/*****************************************************************************
- * gluTessProperty
- *
- * Set the current value of the given property.
- *****************************************************************************/
-void GLAPIENTRY gluTessProperty( GLUtesselator *tobj, GLenum which,
- GLdouble value )
+void GLAPIENTRY
+gluBeginPolygon(GLUtriangulatorObj * tobj)
{
- switch ( which )
- {
- case GLU_TESS_BOUNDARY_ONLY:
- tobj->boundary_only = (GLboolean) value;
- break;
-
- case GLU_TESS_TOLERANCE:
- MSG( 15, " gluTessProperty( tobj:%p ) tolerance: %0.9f\n", tobj, value );
- tobj->tolerance = value;
- break;
-
- case GLU_TESS_WINDING_RULE:
- tobj->winding_rule = (GLenum) value;
- break;
-
- default:
- MSG( 1, " gluTessProperty( tobj:%p which:%d ) invalid enum\n", tobj, which );
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
+/*
+ if(tobj->error!=GLU_NO_ERROR)
+ return;
+*/
+ tobj->error = GLU_NO_ERROR;
+ if (tobj->current_polygon != NULL) {
+ /* gluEndPolygon was not called */
+ tess_call_user_error(tobj, GLU_TESS_ERROR1);
+ /* delete all internal structures */
+ delete_contours(tobj);
+ }
+ else {
+ if ((tobj->current_polygon =
+ (tess_polygon *) malloc(sizeof(tess_polygon))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ tobj->current_polygon->vertex_cnt = 0;
+ tobj->current_polygon->vertices =
+ tobj->current_polygon->last_vertex = NULL;
+ }
}
-/*****************************************************************************
- * gluGetTessProperty
- *
- * Return the current value of the given property.
- *****************************************************************************/
-void GLAPIENTRY gluGetTessProperty( GLUtesselator *tobj, GLenum which,
- GLdouble *value )
+void GLAPIENTRY
+gluEndPolygon(GLUtriangulatorObj * tobj)
{
- switch ( which )
- {
- case GLU_TESS_BOUNDARY_ONLY:
- *value = tobj->boundary_only;
- break;
-
- case GLU_TESS_TOLERANCE:
- *value = tobj->tolerance;
- break;
-
- case GLU_TESS_WINDING_RULE:
- *value = tobj->winding_rule;
- break;
-
- default:
- MSG( 1, " gluGetTessProperty( tobj:%p which:%d ) invalid enum\n", tobj, which );
- tobj->error = GLU_INVALID_ENUM;
- break;
- }
+ /*tess_contour *contour_ptr; */
+
+ /* there was an error */
+ if (tobj->error != GLU_NO_ERROR)
+ goto end;
+
+ /* check if gluBeginPolygon was called */
+ if (tobj->current_polygon == NULL) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR2);
+ return;
+ }
+ tess_test_polygon(tobj);
+ /* there was an error */
+ if (tobj->error != GLU_NO_ERROR)
+ goto end;
+
+ /* any real contours? */
+ if (tobj->contour_cnt == 0) {
+ /* delete all internal structures */
+ delete_contours(tobj);
+ return;
+ }
+ tess_find_contour_hierarchies(tobj);
+ /* there was an error */
+ if (tobj->error != GLU_NO_ERROR)
+ goto end;
+
+ tess_handle_holes(tobj);
+ /* there was an error */
+ if (tobj->error != GLU_NO_ERROR)
+ goto end;
+
+ /* if no callbacks, nothing to do */
+ if (tobj->callbacks.begin != NULL && tobj->callbacks.vertex != NULL &&
+ tobj->callbacks.end != NULL) {
+ if (tobj->callbacks.edgeFlag == NULL)
+ tess_tesselate(tobj);
+ else
+ tess_tesselate_with_edge_flag(tobj);
+ }
+
+ end:
+ /* delete all internal structures */
+ delete_contours(tobj);
}
-/*****************************************************************************
- * gluTessNormal
- *
- * Set the current tessellation normal.
- *****************************************************************************/
-void GLAPIENTRY gluTessNormal( GLUtesselator *tobj, GLdouble x,
- GLdouble y, GLdouble z )
+void GLAPIENTRY
+gluNextContour(GLUtriangulatorObj * tobj, GLenum type)
{
- MSG( 15, " gluTessNormal( tobj:%p n:(%.2f,%.2f,%.2f) )\n", tobj, x, y, z );
-
- ASSIGN_3V( tobj->plane.normal, x, y, z );
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ if (tobj->current_polygon == NULL) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR2);
+ return;
+ }
+ /* first contour? */
+ if (tobj->current_polygon->vertex_cnt)
+ tess_test_polygon(tobj);
}
-
-/*****************************************************************************
- *
- * OBSOLETE TESSELLATION FUNCTIONS
- *
- *****************************************************************************/
-
-void GLAPIENTRY gluBeginPolygon( GLUtesselator *tobj )
+void GLAPIENTRY
+gluTessVertex(GLUtriangulatorObj * tobj, GLdouble v[3], void *data)
{
- gluTessBeginPolygon( tobj, NULL );
- gluTessBeginContour( tobj );
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_vertex *last_vertex_ptr;
+
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ if (polygon == NULL) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR2);
+ return;
+ }
+ last_vertex_ptr = polygon->last_vertex;
+ if (last_vertex_ptr == NULL) {
+ if ((last_vertex_ptr = (tess_vertex *)
+ malloc(sizeof(tess_vertex))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ polygon->vertices = last_vertex_ptr;
+ polygon->last_vertex = last_vertex_ptr;
+ last_vertex_ptr->data = data;
+ last_vertex_ptr->location[0] = v[0];
+ last_vertex_ptr->location[1] = v[1];
+ last_vertex_ptr->location[2] = v[2];
+ last_vertex_ptr->next = NULL;
+ last_vertex_ptr->previous = NULL;
+ ++(polygon->vertex_cnt);
+ }
+ else {
+ tess_vertex *vertex_ptr;
+
+ /* same point twice? */
+ if (fabs(last_vertex_ptr->location[0] - v[0]) < EPSILON &&
+ fabs(last_vertex_ptr->location[1] - v[1]) < EPSILON &&
+ fabs(last_vertex_ptr->location[2] - v[2]) < EPSILON) {
+ tess_call_user_error(tobj, GLU_TESS_ERROR6);
+ return;
+ }
+ if ((vertex_ptr = (tess_vertex *)
+ malloc(sizeof(tess_vertex))) == NULL) {
+ tess_call_user_error(tobj, GLU_OUT_OF_MEMORY);
+ return;
+ }
+ vertex_ptr->data = data;
+ vertex_ptr->location[0] = v[0];
+ vertex_ptr->location[1] = v[1];
+ vertex_ptr->location[2] = v[2];
+ vertex_ptr->next = NULL;
+ vertex_ptr->previous = last_vertex_ptr;
+ ++(polygon->vertex_cnt);
+ last_vertex_ptr->next = vertex_ptr;
+ polygon->last_vertex = vertex_ptr;
+ }
}
-void GLAPIENTRY gluNextContour( GLUtesselator *tobj, GLenum type )
-{
- gluTessEndContour( tobj );
- gluTessBeginContour( tobj );
-}
-void GLAPIENTRY gluEndPolygon( GLUtesselator *tobj )
+static void
+delete_contours(GLUtriangulatorObj * tobj)
{
- gluTessEndContour( tobj );
- gluTessEndPolygon( tobj );
+ tess_polygon *polygon = tobj->current_polygon;
+ tess_contour *contour, *contour_tmp;
+ tess_vertex *vertex, *vertex_tmp;
+
+ /* remove current_polygon list - if exists due to detected error */
+ if (polygon != NULL) {
+ if (polygon->vertices) {
+ for (vertex = polygon->vertices; vertex != polygon->last_vertex;) {
+ vertex_tmp = vertex->next;
+ free(vertex);
+ vertex = vertex_tmp;
+ }
+ free(vertex);
+ }
+ free(polygon);
+ tobj->current_polygon = NULL;
+ }
+ /* remove all contour data */
+ for (contour = tobj->contours; contour != NULL;) {
+ for (vertex = contour->vertices; vertex != contour->last_vertex;) {
+ vertex_tmp = vertex->next;
+ free(vertex);
+ vertex = vertex_tmp;
+ }
+ free(vertex);
+ contour_tmp = contour->next;
+ free(contour);
+ contour = contour_tmp;
+ }
+ tobj->contours = tobj->last_contour = NULL;
+ tobj->contour_cnt = 0;
}
-/* $Id: tess.h,v 1.16 1999/12/06 09:39:34 gareth Exp $ */
+/* $Id: tess.h,v 1.17 2000/07/11 14:11:04 brianp Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 3.1
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
- * Copyright (C) 1999 Brian Paul All Rights Reserved.
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
*
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
*
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
- * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
- * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/*****************************************************************************
- *
- * GLU 1.3 Polygon Tessellation by Gareth Hughes <garethh@bell-labs.com>
- *
- *****************************************************************************/
-#ifndef __GLU_TESS_H__
-#define __GLU_TESS_H__
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
-#include <stdarg.h>
-#include <stdio.h>
-#include "gluP.h"
+#ifndef TESS_H
+#define TESS_H
-#include "tess_typedefs.h"
-#include "tess_macros.h"
-#include "tess_hash.h"
-#include "tess_heap.h"
-#if 0
-#include "tess_grid.h"
-#endif
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include "gluP.h"
+
+#define EPSILON 1e-06 /* epsilon for double precision compares */
-/*****************************************************************************
- * The GLUtesselator structure:
- *****************************************************************************/
-struct GLUtesselator
+typedef enum
{
- tess_callbacks_t callbacks;
- GLenum winding_rule;
- GLboolean boundary_only;
- GLdouble tolerance;
- GLenum orientation;
- void *data;
- GLint num_contours;
- tess_contour_t *contours, *last_contour;
- tess_contour_t *current_contour;
- GLdouble mins[2], maxs[2];
- GLint num_vertices;
- tess_vertex_t **sorted_vertices;
-#if 0
- tess_grid_t *grid; /* Not currently used... */
-#endif
- heap_t *ears;
- GLboolean edge_flag;
- GLuint label;
- tess_plane_t plane;
- GLenum error;
-};
+ OXY,
+ OYZ,
+ OXZ
+}
+projection_type;
+typedef struct callbacks_str
+{
+ void (GLCALLBACK * begin) (GLenum mode);
+ void (GLCALLBACK * edgeFlag) (GLboolean flag);
+ void (GLCALLBACK * vertex) (GLvoid * v);
+ void (GLCALLBACK * end) (void);
+ void (GLCALLBACK * error) (GLenum err);
+}
+tess_callbacks;
-/*****************************************************************************
- * Common tessellation functions:
- *****************************************************************************/
-extern void tess_error_callback( GLUtesselator *, GLenum );
+typedef struct vertex_str
+{
+ void *data;
+ GLdouble location[3];
+ GLdouble x, y;
+ GLboolean edge_flag;
+ struct vertex_str *shadow_vertex;
+ struct vertex_str *next, *previous;
+}
+tess_vertex;
-extern GLdouble twice_contour_area( tess_contour_t *contour );
-extern void reverse_contour( tess_contour_t *contour );
-extern void delete_contour( tess_contour_t **contour );
+typedef struct contour_str
+{
+ GLenum type;
+ GLuint vertex_cnt;
+ GLdouble area;
+ GLenum orientation;
+ struct vertex_str *vertices, *last_vertex;
+ struct contour_str *next, *previous;
+}
+tess_contour;
-extern void contour_dump( tess_contour_t *contour );
+typedef struct polygon_str
+{
+ GLuint vertex_cnt;
+ GLdouble A, B, C, D;
+ GLdouble area;
+ GLenum orientation;
+ struct vertex_str *vertices, *last_vertex;
+}
+tess_polygon;
+struct GLUtriangulatorObj
+{
+ tess_contour *contours, *last_contour;
+ GLuint contour_cnt;
+ tess_callbacks callbacks;
+ tess_polygon *current_polygon;
+ GLenum error;
+ GLdouble A, B, C, D;
+ projection_type projection;
+};
-/*****************************************************************************
- * Debugging output:
- *****************************************************************************/
-#ifdef DEBUG
-extern int tess_dbg_level;
-#define DBG_LEVEL_BASE 1
-#define DBG_LEVEL_VERBOSE 10
-#define DBG_LEVEL_ENTEREXIT 20
+extern void tess_call_user_error(GLUtriangulatorObj *, GLenum);
+extern void tess_test_polygon(GLUtriangulatorObj *);
+extern void tess_find_contour_hierarchies(GLUtriangulatorObj *);
+extern void tess_handle_holes(GLUtriangulatorObj *);
+extern void tess_tesselate(GLUtriangulatorObj *);
+extern void tess_tesselate_with_edge_flag(GLUtriangulatorObj *);
-#ifdef _WIN32
-#define DBG_STREAM stdout
-#else
-#define DBG_STREAM stderr
-#endif
-#ifdef __GNUC__
-#define MSG( level, format, args... ) \
- if ( level <= tess_dbg_level ) { \
- fprintf( DBG_STREAM, "%9.9s:%d:\t ", __FILE__, __LINE__ ); \
- fprintf( DBG_STREAM, format, ## args ); \
- fflush( DBG_STREAM ); \
- }
-#else
-#define MSG tess_msg
-#endif /* __GNUC__ */
-
-#else
-#define MSG tess_msg
-#endif /* DEBUG */
-
-extern INLINE void tess_msg( GLint level, char *format, ... );
-extern INLINE void tess_info( char *file, GLint line );
-
-#ifdef __cplusplus
-}
#endif
-
-#endif /* __GLU_TESS_H__ */
--- /dev/null
+/* $Id: tesselat.c,v 1.3 2000/07/11 14:11:04 brianp Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free
+ * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+
+/*
+ * This file is part of the polygon tesselation code contributed by
+ * Bogdan Sikorski
+ */
+
+
+#ifdef PC_HEADER
+#include "all.h"
+#else
+#include <stdlib.h>
+#include <math.h>
+#include "tess.h"
+#endif
+
+
+
+static GLboolean edge_flag;
+
+static void emit_triangle(GLUtriangulatorObj *, tess_vertex *,
+ tess_vertex *, tess_vertex *);
+
+static void emit_triangle_with_edge_flag(GLUtriangulatorObj *,
+ tess_vertex *, GLboolean,
+ tess_vertex *, GLboolean,
+ tess_vertex *, GLboolean);
+
+static GLdouble
+twice_the_triangle_area(tess_vertex * va, tess_vertex * vb, tess_vertex * vc)
+{
+ return (vb->x - va->x) * (vc->y - va->y) - (vb->y - va->y) * (vc->x -
+ va->x);
+}
+
+static GLboolean
+left(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
+{
+ if (A * x + B * y + C > -EPSILON)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+}
+
+static GLboolean
+right(GLdouble A, GLdouble B, GLdouble C, GLdouble x, GLdouble y)
+{
+ if (A * x + B * y + C < EPSILON)
+ return GL_TRUE;
+ else
+ return GL_FALSE;
+}
+
+static GLint
+convex_ccw(tess_vertex * va,
+ tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
+{
+ GLdouble d;
+
+ d = twice_the_triangle_area(va, vb, vc);
+
+ if (d > EPSILON) {
+ return 1;
+ }
+ else if (d < -EPSILON) {
+ return 0;
+ }
+ else {
+ return -1;
+ }
+}
+
+static GLint
+convex_cw(tess_vertex * va,
+ tess_vertex * vb, tess_vertex * vc, GLUtriangulatorObj * tobj)
+{
+ GLdouble d;
+
+ d = twice_the_triangle_area(va, vb, vc);
+
+ if (d < -EPSILON) {
+ return 1;
+ }
+ else if (d > EPSILON) {
+ return 0;
+ }
+ else {
+ return -1;
+ }
+}
+
+static GLboolean
+diagonal_ccw(tess_vertex * va,
+ tess_vertex * vb,
+ GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ tess_vertex *vc = va->next, *vertex, *shadow_vertex;
+ struct
+ {
+ GLdouble A, B, C;
+ }
+ ac, cb, ba;
+ GLdouble x, y;
+
+ GLint res = convex_ccw(va, vc, vb, tobj);
+ if (res == 0)
+ return GL_FALSE;
+ if (res == -1)
+ return GL_TRUE;
+
+ ba.A = vb->y - va->y;
+ ba.B = va->x - vb->x;
+ ba.C = -ba.A * va->x - ba.B * va->y;
+ ac.A = va->y - vc->y;
+ ac.B = vc->x - va->x;
+ ac.C = -ac.A * vc->x - ac.B * vc->y;
+ cb.A = vc->y - vb->y;
+ cb.B = vb->x - vc->x;
+ cb.C = -cb.A * vb->x - cb.B * vb->y;
+ for (vertex = vb->next; vertex != va; vertex = vertex->next) {
+ shadow_vertex = vertex->shadow_vertex;
+ if (shadow_vertex != NULL &&
+ (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
+ continue;
+ x = vertex->x;
+ y = vertex->y;
+ if (left(ba.A, ba.B, ba.C, x, y) &&
+ left(ac.A, ac.B, ac.C, x, y) && left(cb.A, cb.B, cb.C, x, y))
+ return GL_FALSE;
+ }
+ return GL_TRUE;
+}
+
+static GLboolean
+diagonal_cw(tess_vertex * va,
+ tess_vertex * vb,
+ GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ tess_vertex *vc = va->next, *vertex, *shadow_vertex;
+ struct
+ {
+ GLdouble A, B, C;
+ }
+ ac, cb, ba;
+ GLdouble x, y;
+
+ GLint res = convex_cw(va, vc, vb, tobj);
+ if (res == 0)
+ return GL_FALSE;
+ if (res == -1)
+ return GL_TRUE;
+
+ ba.A = vb->y - va->y;
+ ba.B = va->x - vb->x;
+ ba.C = -ba.A * va->x - ba.B * va->y;
+ ac.A = va->y - vc->y;
+ ac.B = vc->x - va->x;
+ ac.C = -ac.A * vc->x - ac.B * vc->y;
+ cb.A = vc->y - vb->y;
+ cb.B = vb->x - vc->x;
+ cb.C = -cb.A * vb->x - cb.B * vb->y;
+ for (vertex = vb->next; vertex != va; vertex = vertex->next) {
+ shadow_vertex = vertex->shadow_vertex;
+ if (shadow_vertex != NULL &&
+ (shadow_vertex == va || shadow_vertex == vb || shadow_vertex == vc))
+ continue;
+ x = vertex->x;
+ y = vertex->y;
+ if (right(ba.A, ba.B, ba.C, x, y) &&
+ right(ac.A, ac.B, ac.C, x, y) && right(cb.A, cb.B, cb.C, x, y))
+ return GL_FALSE;
+ }
+ return GL_TRUE;
+}
+
+static void
+clip_ear(GLUtriangulatorObj * tobj, tess_vertex * v, tess_contour * contour)
+{
+ emit_triangle(tobj, v->previous, v, v->next);
+ /* the first in the list */
+ if (contour->vertices == v) {
+ contour->vertices = v->next;
+ contour->last_vertex->next = v->next;
+ v->next->previous = contour->last_vertex;
+ }
+ else
+ /* the last ? */
+ if (contour->last_vertex == v) {
+ contour->vertices->previous = v->previous;
+ v->previous->next = v->next;
+ contour->last_vertex = v->previous;
+ }
+ else {
+ v->next->previous = v->previous;
+ v->previous->next = v->next;
+ }
+ free(v);
+ --(contour->vertex_cnt);
+}
+
+static void
+clip_ear_with_edge_flag(GLUtriangulatorObj * tobj,
+ tess_vertex * v, tess_contour * contour)
+{
+ emit_triangle_with_edge_flag(tobj, v->previous, v->previous->edge_flag,
+ v, v->edge_flag, v->next, GL_FALSE);
+ v->previous->edge_flag = GL_FALSE;
+ /* the first in the list */
+ if (contour->vertices == v) {
+ contour->vertices = v->next;
+ contour->last_vertex->next = v->next;
+ v->next->previous = contour->last_vertex;
+ }
+ else
+ /* the last ? */
+ if (contour->last_vertex == v) {
+ contour->vertices->previous = v->previous;
+ v->previous->next = v->next;
+ contour->last_vertex = v->previous;
+ }
+ else {
+ v->next->previous = v->previous;
+ v->previous->next = v->next;
+ }
+ free(v);
+ --(contour->vertex_cnt);
+}
+
+static void
+triangulate_ccw(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ tess_vertex *vertex;
+ GLuint vertex_cnt = contour->vertex_cnt;
+
+ while (vertex_cnt > 3) {
+ vertex = contour->vertices;
+ while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
+ GL_FALSE && tobj->error == GLU_NO_ERROR)
+ vertex = vertex->next;
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ clip_ear(tobj, vertex->next, contour);
+ --vertex_cnt;
+ }
+}
+
+static void
+triangulate_cw(GLUtriangulatorObj * tobj, tess_contour * contour)
+{
+ tess_vertex *vertex;
+ GLuint vertex_cnt = contour->vertex_cnt;
+
+ while (vertex_cnt > 3) {
+ vertex = contour->vertices;
+ while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
+ GL_FALSE && tobj->error == GLU_NO_ERROR)
+ vertex = vertex->next;
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ clip_ear(tobj, vertex->next, contour);
+ --vertex_cnt;
+ }
+}
+
+static void
+triangulate_ccw_with_edge_flag(GLUtriangulatorObj * tobj,
+ tess_contour * contour)
+{
+ tess_vertex *vertex;
+ GLuint vertex_cnt = contour->vertex_cnt;
+
+ while (vertex_cnt > 3) {
+ vertex = contour->vertices;
+ while (diagonal_ccw(vertex, vertex->next->next, tobj, contour) ==
+ GL_FALSE && tobj->error == GLU_NO_ERROR)
+ vertex = vertex->next;
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ clip_ear_with_edge_flag(tobj, vertex->next, contour);
+ --vertex_cnt;
+ }
+}
+
+static void
+triangulate_cw_with_edge_flag(GLUtriangulatorObj * tobj,
+ tess_contour * contour)
+{
+ tess_vertex *vertex;
+ GLuint vertex_cnt = contour->vertex_cnt;
+
+ while (vertex_cnt > 3) {
+ vertex = contour->vertices;
+ while (diagonal_cw(vertex, vertex->next->next, tobj, contour) ==
+ GL_FALSE && tobj->error == GLU_NO_ERROR)
+ vertex = vertex->next;
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ clip_ear_with_edge_flag(tobj, vertex->next, contour);
+ --vertex_cnt;
+ }
+}
+
+void
+tess_tesselate(GLUtriangulatorObj * tobj)
+{
+ tess_contour *contour;
+
+ for (contour = tobj->contours; contour != NULL; contour = contour->next) {
+ if (contour->orientation == GLU_CCW) {
+ triangulate_ccw(tobj, contour);
+ }
+ else {
+ triangulate_cw(tobj, contour);
+ }
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+
+ /* emit the last triangle */
+ emit_triangle(tobj, contour->vertices, contour->vertices->next,
+ contour->vertices->next->next);
+ }
+}
+
+void
+tess_tesselate_with_edge_flag(GLUtriangulatorObj * tobj)
+{
+ tess_contour *contour;
+
+ edge_flag = GL_TRUE;
+ /* first callback with edgeFlag set to GL_TRUE */
+ (tobj->callbacks.edgeFlag) (GL_TRUE);
+
+ for (contour = tobj->contours; contour != NULL; contour = contour->next) {
+ if (contour->orientation == GLU_CCW)
+ triangulate_ccw_with_edge_flag(tobj, contour);
+ else
+ triangulate_cw_with_edge_flag(tobj, contour);
+ if (tobj->error != GLU_NO_ERROR)
+ return;
+ /* emit the last triangle */
+ emit_triangle_with_edge_flag(tobj, contour->vertices,
+ contour->vertices->edge_flag,
+ contour->vertices->next,
+ contour->vertices->next->edge_flag,
+ contour->vertices->next->next,
+ contour->vertices->next->next->edge_flag);
+ }
+}
+
+static void
+emit_triangle(GLUtriangulatorObj * tobj,
+ tess_vertex * v1, tess_vertex * v2, tess_vertex * v3)
+{
+ (tobj->callbacks.begin) (GL_TRIANGLES);
+ (tobj->callbacks.vertex) (v1->data);
+ (tobj->callbacks.vertex) (v2->data);
+ (tobj->callbacks.vertex) (v3->data);
+ (tobj->callbacks.end) ();
+}
+
+static void
+emit_triangle_with_edge_flag(GLUtriangulatorObj * tobj,
+ tess_vertex * v1,
+ GLboolean edge_flag1,
+ tess_vertex * v2,
+ GLboolean edge_flag2,
+ tess_vertex * v3, GLboolean edge_flag3)
+{
+ (tobj->callbacks.begin) (GL_TRIANGLES);
+ if (edge_flag1 != edge_flag) {
+ edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+ (tobj->callbacks.edgeFlag) (edge_flag);
+ }
+ (tobj->callbacks.vertex) (v1->data);
+ if (edge_flag2 != edge_flag) {
+ edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+ (tobj->callbacks.edgeFlag) (edge_flag);
+ }
+ (tobj->callbacks.vertex) (v2->data);
+ if (edge_flag3 != edge_flag) {
+ edge_flag = (edge_flag == GL_TRUE ? GL_FALSE : GL_TRUE);
+ (tobj->callbacks.edgeFlag) (edge_flag);
+ }
+ (tobj->callbacks.vertex) (v3->data);
+ (tobj->callbacks.end) ();
+}
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