2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that (i) the above copyright notices and this permission notice appear in
7 * all copies of the software and related documentation, and (ii) the name of
8 * Silicon Graphics may not be used in any advertising or
9 * publicity relating to the software without the specific, prior written
10 * permission of Silicon Graphics.
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
17 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
32 #define CI_OFFSET_1 16
33 #define CI_OFFSET_2 32
38 static void Init(void)
40 fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
41 fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
42 fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
45 glClearColor(0.0, 0.0, 1.0, 0.0);
49 GLubyte tex3d[SIZE][SIZE][SIZE][3];
52 for (s = 0; s < SIZE; s++) {
53 for (t = 0; t < SIZE; t++) {
54 for (r = 0; r < SIZE; r++) {
56 tex3d[r][t][s][0] = (s < SIZE/2) ? 0 : 255;
57 tex3d[r][t][s][1] = (t < SIZE/2) ? 0 : 255;
58 tex3d[r][t][s][2] = (r < SIZE/2) ? 0 : 255;
60 tex3d[r][t][s][0] = s*255/(SIZE-1);
61 tex3d[r][t][s][1] = t*255/(SIZE-1);
62 tex3d[r][t][s][2] = r*255/(SIZE-1);
68 glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
69 glTexParameterf(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_REPEAT);
70 glTexParameterf(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
71 glTexParameterf(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
73 glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
74 glTexImage3D(GL_TEXTURE_3D, 0, 3, SIZE, SIZE, SIZE, 0,
75 GL_RGB, GL_UNSIGNED_BYTE, tex3d);
76 glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
77 glEnable(GL_TEXTURE_3D);
82 static void Reshape(int width, int height)
85 glViewport(0, 0, (GLint)width, (GLint)height);
87 glMatrixMode(GL_PROJECTION);
89 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
90 glMatrixMode(GL_MODELVIEW);
93 static void Key(unsigned char key, int x, int y)
109 static void Draw(void)
111 glClear(GL_COLOR_BUFFER_BIT);
113 fprintf(stderr, "z: %f\n", z);
117 glVertex3f( 0.9, -0.9, -30.0);
119 glVertex3f( 0.9, 0.9, -30.0);
121 glVertex3f(-0.9, 0.9, -30.0);
123 glVertex3f(-0.9, -0.9, -30.0);
133 static GLenum Args(int argc, char **argv)
137 doubleBuffer = GL_FALSE;
139 for (i = 1; i < argc; i++) {
140 if (strcmp(argv[i], "-sb") == 0) {
141 doubleBuffer = GL_FALSE;
142 } else if (strcmp(argv[i], "-db") == 0) {
143 doubleBuffer = GL_TRUE;
145 fprintf(stderr, "%s (Bad option).\n", argv[i]);
152 int main(int argc, char **argv)
156 glutInit(&argc, argv);
158 if (Args(argc, argv) == GL_FALSE) {
162 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
164 type = GLUT_RGB | GLUT_ALPHA;
165 type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
166 glutInitDisplayMode(type);
168 if (glutCreateWindow(*argv) == GL_FALSE) {
176 glutReshapeFunc(Reshape);
177 glutKeyboardFunc(Key);
178 glutDisplayFunc(Draw);