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-rw-r--r--progs/samples/sphere.c199
1 files changed, 86 insertions, 113 deletions
diff --git a/progs/samples/sphere.c b/progs/samples/sphere.c
index a2d3e43ee2..1f326db04d 100644
--- a/progs/samples/sphere.c
+++ b/progs/samples/sphere.c
@@ -29,28 +29,18 @@
#include <math.h>
#include <stdlib.h>
#include <GL/glut.h>
+#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;
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