From efeddebe814c04d2c7f43f66bb9a77a4388fa842 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Mon, 30 Oct 2000 22:38:55 +0000 Subject: [PATCH] big overhaul of the demo, works better now --- progs/samples/sphere.c | 199 +++++++++++++++++++++---------------------------- 1 file changed, 86 insertions(+), 113 deletions(-) diff --git a/progs/samples/sphere.c b/progs/samples/sphere.c index a2d3e43..1f326db 100644 --- a/progs/samples/sphere.c +++ b/progs/samples/sphere.c @@ -29,28 +29,18 @@ #include #include #include +#include "../util/readtex.c" -#define FALSE 0 -#define TRUE 1 #ifndef PI #define PI 3.14159265358979323846 #endif -#include "loadppm.c" - -int rgb; /* unused */ - -#include "tkmap.c" - GLenum doubleBuffer; int W = 400, H = 400; -char *imageFileName = 0; -PPMImage *image; - -int numComponents; +char *imageFileName = "../images/reflect.rgb"; float *minFilter, *magFilter, *sWrapMode, *tWrapMode; float decal[] = {GL_DECAL}; @@ -66,18 +56,13 @@ float linear_mipmap_linear[] = {GL_LINEAR_MIPMAP_LINEAR}; GLint sphereMap[] = {GL_SPHERE_MAP}; float xRotation = 0.0, yRotation = 0.0; -float zTranslate = -4.0; -GLenum autoRotate = TRUE; -GLenum deepestColor = COLOR_GREEN; -GLenum isLit = TRUE; -GLenum isFogged = FALSE; +float zTranslate = -3.0; +GLenum autoRotate = GL_TRUE; +GLboolean isLit = GL_TRUE; +GLboolean isFogged = GL_FALSE; +GLboolean doTexture = GL_TRUE; float *textureEnvironment = modulate; -struct MipMap { - int width, height; - unsigned char *data; -}; - int cube, cage, cylinder, torus, genericObject; float c[6][4][4][3] = { @@ -661,18 +646,6 @@ void BuildLists(void) genericObject = torus; } -void SetDeepestColor(void) -{ - GLint redBits, greenBits, blueBits; - - glGetIntegerv(GL_RED_BITS, &redBits); - glGetIntegerv(GL_GREEN_BITS, &greenBits); - glGetIntegerv(GL_BLUE_BITS, &blueBits); - - deepestColor = (redBits >= greenBits) ? COLOR_RED : COLOR_GREEN; - deepestColor = (deepestColor >= blueBits) ? deepestColor : COLOR_BLUE; -} - void SetDefaultSettings(void) { @@ -681,7 +654,7 @@ void SetDefaultSettings(void) sWrapMode = repeat; tWrapMode = repeat; textureEnvironment = modulate; - autoRotate = TRUE; + autoRotate = GL_TRUE; } unsigned char *AlphaPadImage(int bufSize, unsigned char *inData, int alpha) @@ -707,46 +680,46 @@ unsigned char *AlphaPadImage(int bufSize, unsigned char *inData, int alpha) void Init(void) { float ambient[] = {0.0, 0.0, 0.0, 1.0}; - float diffuse[] = {0.0, 1.0, 0.0, 1.0}; + float diffuse[] = {1.0, 1.0, 1.0, 1.0}; float specular[] = {1.0, 1.0, 1.0, 1.0}; - float position[] = {2.0, 2.0, 0.0, 1.0}; + float position[] = {0.0, 0.0, 4.0, 0.0}; float fog_color[] = {0.0, 0.0, 0.0, 1.0}; float mat_ambient[] = {0.0, 0.0, 0.0, 1.0}; float mat_shininess[] = {90.0}; float mat_specular[] = {1.0, 1.0, 1.0, 1.0}; - float mat_diffuse[] = {1.0, 1.0, 1.0, 1.0}; - float lmodel_ambient[] = {0.0, 0.0, 0.0, 1.0}; + float mat_diffuse[] = {0.8, 0.8, 0.8, 1.0}; + float lmodel_ambient[] = {0.2, 0.2, 0.2, 1.0}; float lmodel_twoside[] = {GL_TRUE}; + int w, h; + GLenum format; + char *image; + + printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER)); - SetDeepestColor(); SetDefaultSettings(); - if (numComponents == 4) { - image = LoadPPM(imageFileName); - image->data = AlphaPadImage(image->sizeX*image->sizeY, - image->data, 128); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents, - image->sizeX, image->sizeY, - GL_RGBA, GL_UNSIGNED_BYTE, image->data); - } else { - image = LoadPPM(imageFileName); - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - gluBuild2DMipmaps(GL_TEXTURE_2D, numComponents, - image->sizeX, image->sizeY, - GL_RGB, GL_UNSIGNED_BYTE, image->data); + image = LoadRGBImage(imageFileName, &w, &h, &format); + if (!image) { + printf("Error: couldn't load %s\n", imageFileName); + exit(1); } + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + gluBuild2DMipmaps(GL_TEXTURE_2D, format, w, h, + GL_RGB, GL_UNSIGNED_BYTE, image); + + free(image); glFogf(GL_FOG_DENSITY, 0.125); glFogi(GL_FOG_MODE, GL_LINEAR); glFogf(GL_FOG_START, 4.0); - glFogf(GL_FOG_END, 9.0); + glFogf(GL_FOG_END, 8.5); glFogfv(GL_FOG_COLOR, fog_color); glLightfv(GL_LIGHT0, GL_AMBIENT, ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, specular); glLightfv(GL_LIGHT0, GL_POSITION, position); + glEnable(GL_LIGHT0); glMaterialfv(GL_FRONT_AND_BACK, GL_SHININESS, mat_shininess); glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, mat_specular); @@ -757,18 +730,14 @@ void Init(void) glLightModelfv(GL_LIGHT_MODEL_TWO_SIDE, lmodel_twoside); glShadeModel(GL_SMOOTH); - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); glClearColor(0.0, 0.0, 0.0, 0.0); - glViewport(0, 0, W, H); glEnable(GL_DEPTH_TEST); glFrontFace(GL_CW); glEnable(GL_CULL_FACE); glCullFace(GL_BACK); - glEnable(GL_TEXTURE_2D); glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap); glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap); glEnable(GL_TEXTURE_GEN_S); @@ -786,15 +755,18 @@ void Init(void) void ReInit(void) { - if (genericObject == torus) { glEnable(GL_DEPTH_TEST); } else { glDisable(GL_DEPTH_TEST); } + glEnable(GL_DEPTH_TEST); + +#if 0 if (isFogged) { textureEnvironment = modulate; } +#endif glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter); glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter); @@ -803,59 +775,54 @@ void ReInit(void) void Draw(void) { - - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0); - glMatrixMode(GL_MODELVIEW); - glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); - if (isFogged) { + + /* draw cage */ + if (isFogged) glEnable(GL_FOG); - glColor3fv(RGBMap[deepestColor]); - } else { - glColor3fv(RGBMap[COLOR_WHITE]); - } + else + glDisable(GL_FOG); + glColor3f(1, 1, 1); glDisable(GL_LIGHTING); - glDisable(GL_LIGHT0); glDisable(GL_TEXTURE_2D); glCallList(cage); - glPushMatrix(); - glTranslatef(0.0, 0.0, zTranslate); - glRotatef(xRotation, 1, 0, 0); - glRotatef(yRotation, 0, 1, 0); - - if (isLit == TRUE) { + /* draw object */ + if (isLit) glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - } - - glEnable(GL_TEXTURE_2D); - if (isFogged) { - glDisable(GL_FOG); - } - glPolygonMode(GL_FRONT, GL_FILL); - glColor3fv(RGBMap[deepestColor]); - glCallList(genericObject); + else + glColor3f(1.0, 0.5, 0.2); + if (doTexture) + glEnable(GL_TEXTURE_2D); + glPushMatrix(); + glTranslatef(0.0, 0.0, zTranslate); + glRotatef(xRotation, 1, 0, 0); + glRotatef(yRotation, 0, 1, 0); + glCallList(genericObject); glPopMatrix(); - glFlush(); - if (autoRotate) { - xRotation += .75; - yRotation += .375; - } + glFlush(); glutSwapBuffers(); } void Reshape(int width, int height) { - W = width; H = height; ReInit(); glViewport( 0, 0, width, height ); /*new*/ + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-0.2, 0.2, -0.2, 0.2, 0.15, 9.0); + glMatrixMode(GL_MODELVIEW); +} + +void Idle(void) +{ + xRotation += .75; + yRotation += .375; + glutPostRedisplay(); } void Key2(int key, int x, int y) @@ -864,27 +831,28 @@ void Key2(int key, int x, int y) switch (key) { case GLUT_KEY_LEFT: yRotation -= 0.5; - autoRotate = FALSE; + autoRotate = GL_FALSE; ReInit(); break; case GLUT_KEY_RIGHT: yRotation += 0.5; - autoRotate = FALSE; + autoRotate = GL_FALSE; ReInit(); break; case GLUT_KEY_UP: xRotation -= 0.5; - autoRotate = FALSE; + autoRotate = GL_FALSE; ReInit(); break; case GLUT_KEY_DOWN: xRotation += 0.5; - autoRotate = FALSE; + autoRotate = GL_FALSE; ReInit(); break; default: return; } + glutPostRedisplay(); } void Key(unsigned char key, int x, int y) @@ -892,15 +860,28 @@ void Key(unsigned char key, int x, int y) switch (key) { case 27: - free(image->data); + /* free(image->data);*/ exit(1); case 'a': autoRotate = !autoRotate; + if (autoRotate) + glutIdleFunc(Idle); + else + glutIdleFunc(NULL); + ReInit(); break; - case 'c': - genericObject = (genericObject == cube) ? cylinder : cube; + case 'o': + if (genericObject == cube) { + genericObject = cylinder; + } + else if (genericObject == cylinder) { + genericObject = torus; + } + else { + genericObject = cube; + } ReInit(); break; case 'd': @@ -913,6 +894,7 @@ void Key(unsigned char key, int x, int y) break; case 'l': isLit = !isLit; + printf("lit %d\n", isLit); ReInit(); break; case 'f': @@ -920,7 +902,7 @@ void Key(unsigned char key, int x, int y) ReInit(); break; case 't': - genericObject = torus; + doTexture = !doTexture; ReInit(); break; case '0': @@ -958,6 +940,7 @@ void Key(unsigned char key, int x, int y) default: return; } + glutPostRedisplay(); } GLenum Args(int argc, char **argv) @@ -965,7 +948,6 @@ GLenum Args(int argc, char **argv) GLint i; doubleBuffer = GL_TRUE; - numComponents = 4; for (i = 1; i < argc; i++) { if (strcmp(argv[i], "-sb") == 0) { @@ -979,10 +961,6 @@ GLenum Args(int argc, char **argv) } else { imageFileName = argv[++i]; } - } else if (strcmp(argv[i], "-4") == 0) { - numComponents = 4; - } else if (strcmp(argv[i], "-3") == 0) { - numComponents = 3; } else { printf("%s (Bad option).\n", argv[i]); return GL_FALSE; @@ -991,11 +969,6 @@ GLenum Args(int argc, char **argv) return GL_TRUE; } -void GLUTCALLBACK glut_post_redisplay_p(void) -{ - glutPostRedisplay(); -} - int main(int argc, char **argv) { GLenum type; @@ -1027,7 +1000,7 @@ int main(int argc, char **argv) glutKeyboardFunc(Key); glutSpecialFunc(Key2); glutDisplayFunc(Draw); - glutIdleFunc(glut_post_redisplay_p); + glutIdleFunc(Idle); glutMainLoop(); return 0; -- 2.7.4