diff options
Diffstat (limited to 'progs/demos/stex3d.c')
| -rw-r--r-- | progs/demos/stex3d.c | 60 |
1 files changed, 23 insertions, 37 deletions
diff --git a/progs/demos/stex3d.c b/progs/demos/stex3d.c index 114ba9a24f8..2350532c981 100644 --- a/progs/demos/stex3d.c +++ b/progs/demos/stex3d.c @@ -1,4 +1,4 @@ -/* $Id: stex3d.c,v 1.3 1999/12/16 08:54:22 brianp Exp $ */ +/* $Id: stex3d.c,v 1.4 2000/03/22 19:48:57 brianp Exp $ */ /*----------------------------- * stex3d.c GL example of the mesa 3d-texture extention to simulate procedural @@ -17,6 +17,9 @@ /* * $Log: stex3d.c,v $ + * Revision 1.4 2000/03/22 19:48:57 brianp + * converted from GL_EXT_texture3D to GL 1.2 + * * Revision 1.3 1999/12/16 08:54:22 brianp * added a cast to malloc call * @@ -56,7 +59,6 @@ void init(void), initNoise(void); float turbulence(float point[3], float lofreq, float hifreq); -int isExtSupported(char *ext); void KeyHandler( unsigned char key, int x, int y ); GLenum parseCmdLine(int argc, char **argv); float noise3(float vec[3]); @@ -124,17 +126,20 @@ void init() /* start the noise function variables */ initNoise(); - /* see if the texture 3d extention is supported */ - if (!isExtSupported("GL_EXT_texture3D")) { - printf("Sorry this GL implementation (%s) does not support 3d texture extentions\n", - (char *)(glGetString(GL_RENDERER))); -/* tkQuit();*/ + /* see if we have OpenGL 1.2 or later, for 3D texturing */ + { + const char *version = (const char *) glGetString(GL_VERSION); + if (strncmp(version, "1.0", 3) == 0 || + strncmp(version, "1.1", 3) == 0) { + printf("Sorry, OpenGL 1.2 or later is required\n"); + exit(1); + } } /* if texture is supported then generate the texture */ create3Dtexture(); - glEnable(GL_TEXTURE_3D_EXT); + glEnable(GL_TEXTURE_3D); /* glBlendFunc(GL_SRC_COLOR, GL_SRC_ALPHA); glEnable(GL_BLEND); @@ -252,39 +257,20 @@ void create3Dtexture() printf("setting up 3d texture...\n"); glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexParameteri(GL_TEXTURE_3D_EXT, GL_TEXTURE_WRAP_R_EXT, GL_REPEAT); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_REPEAT); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT); glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); - glTexImage3DEXT(GL_TEXTURE_3D_EXT, 0, GL_RGBA, - tex_width, tex_height, tex_depth, - 0, GL_RGBA, GL_UNSIGNED_BYTE, voxels); + glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA, + tex_width, tex_height, tex_depth, + 0, GL_RGBA, GL_UNSIGNED_BYTE, voxels); printf("finished setting up 3d texture image...\n"); } -int isExtSupported(char *ext) -{ - /* routine to find whether a specified OpenGL extension is supported */ - - char *c; - int len; - char *allext = (char *)(glGetString(GL_EXTENSIONS)); - - len = strlen(ext); - if (len <= 0) return 0; - - c = allext; - while (c) { - if (!strncmp(c,ext,len)) return 1; - c = strchr(c+1,'G'); - } - return 0; -} - void printHelp() { printf("\nUsage: stex3d <cmd line options>\n"); @@ -435,10 +421,10 @@ void KeyHandler( unsigned char key, int x, int y ) angz-=10; break; case 't': - glEnable(GL_TEXTURE_3D_EXT); + glEnable(GL_TEXTURE_3D); break; case 'T': - glDisable(GL_TEXTURE_3D_EXT); + glDisable(GL_TEXTURE_3D); break; case 's': glShadeModel(GL_SMOOTH); |