2 ** License Applicability. Except to the extent portions of this file are
3 ** made subject to an alternative license as permitted in the SGI Free
4 ** Software License B, Version 1.1 (the "License"), the contents of this
5 ** file are subject only to the provisions of the License. You may not use
6 ** this file except in compliance with the License. You may obtain a copy
7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
10 ** http://oss.sgi.com/projects/FreeB
12 ** Note that, as provided in the License, the Software is distributed on an
13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21 ** Copyright in any portions created by third parties is as indicated
22 ** elsewhere herein. All Rights Reserved.
24 ** Additional Notice Provisions: The application programming interfaces
25 ** established by SGI in conjunction with the Original Code are The
26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31 ** published by SGI, but has not been independently verified as being
32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
40 #include "glimports.h"
44 #include "nurbsconsts.h"
45 #include "nurbstess.h"
48 #include "knotvector.h"
53 NurbsTessellator::set_domain_distance_u_rate(REAL u_rate)
55 subdivider.set_domain_distance_u_rate(u_rate);
59 NurbsTessellator::set_domain_distance_v_rate(REAL v_rate)
61 subdivider.set_domain_distance_v_rate(v_rate);
65 NurbsTessellator::set_is_domain_distance_sampling(int flag)
67 subdivider.set_is_domain_distance_sampling(flag);
71 NurbsTessellator::resetObjects( void )
77 NurbsTessellator::makeobj( int )
80 _glu_dprintf( "makeobj\n" );
85 NurbsTessellator::closeobj( void )
88 _glu_dprintf( "closeobj\n" );
93 NurbsTessellator::bgnrender( void )
96 _glu_dprintf( "bgnrender\n" );
101 NurbsTessellator::endrender( void )
104 _glu_dprintf( "endrender\n" );
108 /*-----------------------------------------------------------------------------
109 * do_freebgnsurface - free o_surface structure
111 * Client: do_freeall(), bgnsurface()
112 *-----------------------------------------------------------------------------
115 NurbsTessellator::do_freebgnsurface( O_surface *o_surface )
117 o_surface->deleteMe( o_surfacePool );
121 /*-----------------------------------------------------------------------------
122 * do_bgnsurface - begin the display of a surface
124 * Client: bgnsurface()
125 *-----------------------------------------------------------------------------
128 NurbsTessellator::do_bgnsurface( O_surface *o_surface )
136 if( ! playBack ) bgnrender();
139 isSurfaceModified = 0;
142 currentSurface = o_surface;
143 nextTrim = &( currentSurface->o_trim );
144 nextNurbssurface = &( currentSurface->o_nurbssurface );
147 /*-----------------------------------------------------------------------------
148 * do_bgncurve - begin the display of a curve
151 *-----------------------------------------------------------------------------
154 NurbsTessellator::do_bgncurve( O_curve *o_curve )
162 currentCurve = o_curve;
163 currentCurve->curvetype = ct_none;
166 if( *nextCurve != o_curve ) {
168 *nextCurve = o_curve;
171 if( ! playBack ) bgnrender();
174 nextCurve = &(o_curve->next);
175 nextPwlcurve = &(o_curve->curve.o_pwlcurve);
176 nextNurbscurve = &(o_curve->curve.o_nurbscurve);
179 /*-----------------------------------------------------------------------------
183 *-----------------------------------------------------------------------------
187 NurbsTessellator::do_endcurve( void )
196 if (currentCurve->curvetype == ct_nurbscurve)
202 if( ! isDataValid ) {
203 do_freecurveall( currentCurve );
208 errval = ::mysetjmp( jumpbuffer );
210 if( currentCurve->curvetype == ct_nurbscurve ) {
211 subdivider.beginQuilts();
212 for( O_nurbscurve *n = currentCurve->curve.o_nurbscurve; n != 0; n = n->next )
213 subdivider.addQuilt( n->bezier_curves );
214 subdivider.endQuilts();
215 subdivider.drawCurves();
216 if( ! playBack ) endrender();
219 if( ! playBack ) endrender();
220 /*do_draw_pwlcurve( currentCurve->curve.o_pwlcurve ) */;
224 if( ! playBack ) endrender();
225 do_nurbserror( errval );
227 do_freecurveall( currentCurve );
232 /*-----------------------------------------------------------------------------
233 * do_endsurface - mark end of surface, display surface, free immediate data
236 *-----------------------------------------------------------------------------
239 NurbsTessellator::do_endsurface( void )
252 *nextNurbssurface = 0;
254 if( ! isDataValid ) {
259 if( *nextTrim != 0 ) {
266 errval = ::mysetjmp( jumpbuffer );
270 subdivider.beginTrims();
271 for( O_trim *trim = currentSurface->o_trim; trim; trim = trim->next ) {
272 subdivider.beginLoop();
273 for( O_curve *curve = trim->o_curve; curve; curve = curve->next ) {
275 assert( curve->curvetype != ct_none );
276 if (curve->curvetype == ct_pwlcurve) {
277 O_pwlcurve *c = curve->curve.o_pwlcurve;
278 subdivider.addArc( c->npts, c->pts, curve->nuid );
280 Quilt *quilt = curve->curve.o_nurbscurve->bezier_curves;
281 Quiltspec *qspec = quilt->qspec;
282 REAL *cpts = quilt->cpts + qspec->offset;
283 REAL *cptsend = cpts + (qspec->width * qspec->order * qspec->stride);
284 for( ; cpts != cptsend; cpts += qspec->order*qspec->stride )
285 subdivider.addArc( cpts, quilt, curve->nuid );
288 subdivider.endLoop();
290 subdivider.endTrims();
293 subdivider.beginQuilts();
294 for( O_nurbssurface *n = currentSurface->o_nurbssurface; n; n = n->next )
295 subdivider.addQuilt( n->bezier_patches );
296 subdivider.endQuilts();
297 subdivider.drawSurfaces( currentSurface->nuid );
298 if( ! playBack ) endrender();
300 if( ! playBack ) endrender();
301 do_nurbserror( errval );
308 /*-----------------------------------------------------------------------------
309 * do_freeall - free all data allocated in immediate mode
312 *-----------------------------------------------------------------------------
315 NurbsTessellator::do_freeall( void )
317 for( O_trim *o_trim = currentSurface->o_trim; o_trim; ) {
318 O_trim *next_o_trim = o_trim->next;
319 for( O_curve *curve = o_trim->o_curve; curve; ) {
320 O_curve *next_o_curve = curve->next;
321 do_freecurveall( curve );
322 curve = next_o_curve;
324 if( o_trim->save == 0 ) do_freebgntrim( o_trim );
325 o_trim = next_o_trim;
328 O_nurbssurface *nurbss, *next_nurbss;
329 for( nurbss= currentSurface->o_nurbssurface; nurbss; nurbss = next_nurbss) {
330 next_nurbss = nurbss->next;
331 if( nurbss->save == 0 )
332 do_freenurbssurface( nurbss );
337 if( currentSurface->save == 0 ) do_freebgnsurface( currentSurface );
341 NurbsTessellator::do_freecurveall( O_curve *curve )
343 assert( curve->curvetype != ct_none );
345 if( curve->curvetype == ct_nurbscurve ) {
346 O_nurbscurve *ncurve, *next_ncurve;
347 for( ncurve=curve->curve.o_nurbscurve; ncurve; ncurve=next_ncurve ) {
348 next_ncurve = ncurve->next;
349 if( ncurve->save == 0 )
350 do_freenurbscurve( ncurve );
355 O_pwlcurve *pcurve, *next_pcurve;
356 for( pcurve=curve->curve.o_pwlcurve; pcurve; pcurve=next_pcurve ) {
357 next_pcurve = pcurve->next;
358 if( pcurve->save == 0 )
359 do_freepwlcurve( pcurve );
364 if( curve->save == 0 )
365 do_freebgncurve( curve );
369 /*-----------------------------------------------------------------------------
370 * do_freebgntrim - free the space allocated for a trim loop
373 *-----------------------------------------------------------------------------
376 NurbsTessellator::do_freebgntrim( O_trim *o_trim )
378 o_trim->deleteMe( o_trimPool );
382 /*-----------------------------------------------------------------------------
383 * do_bgntrim - link in a trim loop to the current trimmed surface description
386 *-----------------------------------------------------------------------------
389 NurbsTessellator::do_bgntrim( O_trim *o_trim )
404 if( *nextTrim != o_trim ) {
409 currentTrim = o_trim;
410 nextTrim = &(o_trim->next);
411 nextCurve = &(o_trim->o_curve);
415 /*-----------------------------------------------------------------------------
416 * do_endtrim - mark the end of the current trim loop
419 *-----------------------------------------------------------------------------
422 NurbsTessellator::do_endtrim( void )
430 if( currentTrim->o_curve == 0 ) {
437 if( *nextCurve != 0 ) {
443 /*-----------------------------------------------------------------------------
447 *-----------------------------------------------------------------------------
450 NurbsTessellator::do_freepwlcurve( O_pwlcurve *o_pwlcurve )
452 o_pwlcurve->deleteMe( o_pwlcurvePool );
456 NurbsTessellator::do_freebgncurve( O_curve *o_curve )
458 o_curve->deleteMe( o_curvePool );
461 /*-----------------------------------------------------------------------------
462 * do_pwlcurve - link in pwl trim loop to the current surface description
465 *-----------------------------------------------------------------------------
468 NurbsTessellator::do_pwlcurve( O_pwlcurve *o_pwlcurve )
472 if( o_pwlcurve->save == 0 )
473 do_freepwlcurve(o_pwlcurve );
482 if( o_pwlcurve->used ) {
487 o_pwlcurve->used = 1;
489 if( currentCurve->curvetype == ct_none ) {
490 currentCurve->curvetype = ct_pwlcurve;
491 } else if( currentCurve->curvetype != ct_pwlcurve ) {
497 if( *nextPwlcurve != o_pwlcurve ) {
499 *nextPwlcurve = o_pwlcurve;
501 nextPwlcurve = &(o_pwlcurve->next);
503 if( o_pwlcurve->owner != currentCurve ) {
505 o_pwlcurve->owner = currentCurve;
513 /*-----------------------------------------------------------------------------
514 * do_freenurbscurve -
517 *-----------------------------------------------------------------------------
520 NurbsTessellator::do_freenurbscurve( O_nurbscurve *o_nurbscurve )
522 o_nurbscurve->bezier_curves->deleteMe( quiltPool );
523 o_nurbscurve->deleteMe( o_nurbscurvePool );
527 /*-----------------------------------------------------------------------------
530 * Client: nurbscurve()
531 *-----------------------------------------------------------------------------
534 NurbsTessellator::do_nurbscurve( O_nurbscurve *o_nurbscurve )
541 if( o_nurbscurve->used ) {
542 /* error - curve was already called in current surface */
547 o_nurbscurve->used = 1;
549 if( currentCurve->curvetype == ct_none ) {
550 currentCurve->curvetype = ct_nurbscurve;
551 } else if( currentCurve->curvetype != ct_nurbscurve ) {
557 if( *nextNurbscurve != o_nurbscurve ) {
559 *nextNurbscurve = o_nurbscurve;
562 nextNurbscurve = &(o_nurbscurve->next);
564 if( o_nurbscurve->owner != currentCurve ) {
566 o_nurbscurve->owner = currentCurve;
569 if( o_nurbscurve->owner == 0 )
577 /*-----------------------------------------------------------------------------
578 * do_freenurbssurface -
581 *-----------------------------------------------------------------------------
585 NurbsTessellator::do_freenurbssurface( O_nurbssurface *o_nurbssurface )
587 o_nurbssurface->bezier_patches->deleteMe( quiltPool );
588 o_nurbssurface->deleteMe( o_nurbssurfacePool );
591 /*-----------------------------------------------------------------------------
594 * Client: nurbssurface()
595 *-----------------------------------------------------------------------------
598 NurbsTessellator::do_nurbssurface( O_nurbssurface *o_nurbssurface )
605 if( o_nurbssurface->used ) {
606 /* error - surface was already called in current block */
611 o_nurbssurface->used = 1;
613 if( *nextNurbssurface != o_nurbssurface ) {
614 isSurfaceModified = 1;
615 *nextNurbssurface = o_nurbssurface;
618 if( o_nurbssurface->owner != currentSurface ) {
619 isSurfaceModified = 1;
620 o_nurbssurface->owner = currentSurface;
622 nextNurbssurface = &(o_nurbssurface->next);
629 /*-----------------------------------------------------------------------------
630 * do_freenurbsproperty
632 *-----------------------------------------------------------------------------
636 NurbsTessellator::do_freenurbsproperty( Property *prop )
638 prop->deleteMe( propertyPool );
642 /*-----------------------------------------------------------------------------
643 * do_setnurbsproperty -
645 *-----------------------------------------------------------------------------
649 NurbsTessellator::do_setnurbsproperty( Property *prop )
651 renderhints.setProperty( prop->tag, prop->value );
652 if( prop->save == 0 )
653 do_freenurbsproperty( prop );
657 NurbsTessellator::do_setnurbsproperty2( Property *prop )
659 Mapdesc *mapdesc = maplist.find( prop->type );
661 mapdesc->setProperty( prop->tag, prop->value );
662 if( prop->save == 0 )
663 do_freenurbsproperty( prop );
667 NurbsTessellator::errorHandler( int )
672 NurbsTessellator::do_nurbserror( int msg )
678 NurbsTessellator::do_check_knots( Knotvector *knots, const char *msg )
680 int status = knots->validate();
682 do_nurbserror( status );
683 if( renderhints.errorchecking != N_NOMSG ) knots->show( msg );