static void Key( unsigned char key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
case 'f':
ModeMenu((state ^ FOG_MASK) & FOG_MASK);
break;
case 's':
ModeMenu((state ^ SHADE_MASK) & SHADE_MASK);
break;
case 't':
ModeMenu((state ^ STIPPLE_MASK) & STIPPLE_MASK);
break;
case 'l':
ModeMenu((state ^ LIGHT_MASK) & (LIT|UNLIT));
break;
case 'm':
ModeMenu((state ^ MATERIAL_MASK) & MATERIAL_MASK);
break;
case 'c':
ModeMenu((state ^ CLIP_MASK) & CLIP_MASK);
break;
case 'v':
ModeMenu((LOCKED|IMMEDIATE|DRAW_ELTS|TRIANGLES) & allowed);
break;
case 'V':
ModeMenu(UNLOCKED|IMMEDIATE|GLVERTEX|STRIPS);
break;
case 'b':
Benchmark(5.0, 0);
break;
case 'B':
Benchmark(0, 5.0);
break;
case 'i':
dist += .25;
set_matrix();
glutPostRedisplay();
break;
case 'I':
dist -= .25;
set_matrix();
glutPostRedisplay();
break;
case '-':
case '_':
plane[3] += 2.0;
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClipPlane(GL_CLIP_PLANE0, plane);
set_matrix();
glutPostRedisplay();
break;
case '+':
case '=':
plane[3] -= 2.0;
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClipPlane(GL_CLIP_PLANE0, plane);
set_matrix();
glutPostRedisplay();
break;
case ' ':
Init(0,0);
break;
}
}
int main(int argc, char **argv)
{
GLenum type;
char *extensions;
GLuint arg_mode = Args(argc, argv);
if (arg_mode & QUIT)
exit(0);
#ifndef MONA
read_surface( "isosurf.dat" );
#else
read_surface( "/MESA/ISOSURF.DAT" );
#endif
glutInitWindowPosition(0, 0);
glutInitWindowSize(400, 400);
type = GLUT_DEPTH;
type |= GLUT_RGB;
type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
glutInitDisplayMode(type);
if (glutCreateWindow("Isosurface") <= 0) {
exit(0);
}
/* Make sure server supports the vertex array extension */
extensions = (char *) glGetString( GL_EXTENSIONS );
if (!strstr( extensions, "GL_EXT_vertex_array" ))
{
printf("Vertex arrays not supported by this renderer\n");
allowed &= ~(LOCKED|DRAW_ARRAYS|DRAW_ELTS|ARRAY_ELT);
}
else if (!strstr( extensions, "GL_EXT_compiled_vertex_array" ))
{
printf("Compiled vertex arrays not supported by this renderer\n");
allowed &= ~LOCKED;
}
Init(argc, argv);
ModeMenu(arg_mode);
glutCreateMenu(ModeMenu);
glutAddMenuEntry("GL info", GLINFO);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Lit", LIT);
glutAddMenuEntry("Unlit", UNLIT);
glutAddMenuEntry("Reflect", REFLECT);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Smooth", SHADE_SMOOTH);
glutAddMenuEntry("Flat", SHADE_FLAT);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Fog", FOG);
glutAddMenuEntry("No Fog", NO_FOG);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Stipple", STIPPLE);
glutAddMenuEntry("No Stipple", NO_STIPPLE);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Polygon Mode Fill", POLYGON_FILL);
glutAddMenuEntry("Polygon Mode Line", POLYGON_LINE);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Point Filtered", POINT_FILTER);
glutAddMenuEntry("Linear Filtered", LINEAR_FILTER);
glutAddMenuEntry("", 0);
glutAddMenuEntry("GL_TRIANGLES", TRIANGLES);
glutAddMenuEntry("GL_TRIANGLE_STRIPS", STRIPS);
glutAddMenuEntry("GL_POINTS", POINTS);
glutAddMenuEntry("", 0);
glutAddMenuEntry("Displaylist", DISPLAYLIST);
glutAddMenuEntry("Immediate", IMMEDIATE);
glutAddMenuEntry("", 0);
if (allowed & LOCKED) {
glutAddMenuEntry("Locked Arrays (CVA)", LOCKED);
glutAddMenuEntry("Unlocked Arrays", UNLOCKED);
glutAddMenuEntry("", 0);
}
glutAddMenuEntry("glVertex", GLVERTEX);
if (allowed & DRAW_ARRAYS) {
glutAddMenuEntry("glDrawElements", DRAW_ELTS);
glutAddMenuEntry("glDrawArrays", DRAW_ARRAYS);
glutAddMenuEntry("glArrayElement", ARRAY_ELT);
}
glutAddMenuEntry("", 0);
glutAddMenuEntry("Quit", QUIT);
glutAttachMenu(GLUT_RIGHT_BUTTON);
glutReshapeFunc(Reshape);
glutKeyboardFunc(Key);
glutSpecialFunc(SpecialKey);
glutDisplayFunc(Display);
glutMainLoop();
return 0;
}
static void Init(int argc, char *argv[])
{
GLfloat fogColor[4] = {0.5,1.0,0.5,1.0};
xrot = 0;
yrot = 0;
dist = -6;
plane[0] = 1.0;
plane[1] = 0.0;
plane[2] = -1.0;
plane[3] = 0.0;
glClearColor(0.0, 0.0, 1.0, 0.0);
glEnable( GL_DEPTH_TEST );
glEnable( GL_VERTEX_ARRAY_EXT );
glEnable( GL_NORMAL_ARRAY_EXT );
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glFrustum( -1.0, 1.0, -1.0, 1.0, 5, 25 );
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClipPlane(GL_CLIP_PLANE0, plane);
InitMaterials();
set_matrix();
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_FASTEST);
glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_SPHERE_MAP);
/* Green fog is easy to see */
glFogi(GL_FOG_MODE,GL_EXP2);
glFogfv(GL_FOG_COLOR,fogColor);
glFogf(GL_FOG_DENSITY,0.15);
glHint(GL_FOG_HINT,GL_DONT_CARE);
{
static int firsttime = 1;
if (firsttime) {
firsttime = 0;
compactify_arrays();
expand_arrays();
make_tri_indices();
if (!LoadRGBMipmaps(TEXTURE_FILE, GL_RGB)) {
printf("Error: couldn't load texture image\n");
exit(1);
}
}
}
ModeMenu(SHADE_SMOOTH|
LIT|
POINT_FILTER|
NO_USER_CLIP|
NO_MATERIALS|
NO_FOG|
NO_STIPPLE|
IMMEDIATE|
STRIPS|
UNLOCKED|
GLVERTEX);
if (PrintInfo) {
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
}
}
static void Init( int argc, char *argv[] )
{
GLuint texObj[2];
GLint units;
if (!glutExtensionSupported("GL_ARB_multitexture")) {
printf("Sorry, GL_ARB_multitexture not supported by this renderer.\n");
exit(1);
}
if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
printf("Sorry, GL_EXT_paletted_texture not supported by this renderer.\n");
exit(1);
}
glGetIntegerv(GL_MAX_TEXTURE_UNITS_ARB, &units);
printf("%d texture units supported\n", units);
/* allocate two texture objects */
glGenTextures(2, texObj);
/* setup texture obj 0 */
glBindTexture(GL_TEXTURE_2D, texObj[0]);
#ifdef LINEAR_FILTER
/* linear filtering looks much nicer but is much slower for Mesa */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
foo
#else
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#endif
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
load_tex(TEXTURE_1_FILE, 0);
#if 0
if (!LoadRGBMipmaps(TEXTURE_1_FILE, GL_RGB)) {
printf("Error: couldn't load texture image\n");
exit(1);
}
#endif
/* setup texture obj 1 */
glBindTexture(GL_TEXTURE_2D, texObj[1]);
#ifdef LINEAR_FILTER
/* linear filtering looks much nicer but is much slower for Mesa */
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
foo
#else
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
#endif
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
load_tex(TEXTURE_2_FILE, 1);
#if 0
if (!LoadRGBMipmaps(TEXTURE_2_FILE, GL_RGB)) {
printf("Error: couldn't load texture image\n");
exit(1);
}
#endif
/* now bind the texture objects to the respective texture units */
#ifdef GL_ARB_multitexture
glActiveTextureARB(GL_TEXTURE0_ARB);
glBindTexture(GL_TEXTURE_2D, texObj[0]);
glActiveTextureARB(GL_TEXTURE1_ARB);
glBindTexture(GL_TEXTURE_2D, texObj[1]);
#endif
glShadeModel(GL_FLAT);
glClearColor(0.3, 0.3, 0.4, 1.0);
ModeMenu(TEXBOTH);
if (argc > 1 && strcmp(argv[1], "-info")==0) {
printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
printf("GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
printf("GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
printf("GL_EXTENSIONS = %s\n", (char *) glGetString(GL_EXTENSIONS));
}
}
