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* Copyright (c) 1993-2003, Silicon Graphics, Inc.
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* Permission to use, copy, modify, and distribute this software for any
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* purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright
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* notice and this permission notice appear in supporting documentation,
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* and that the name of Silicon Graphics, Inc. not be used in
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* advertising or publicity pertaining to distribution of the software
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* without specific, written prior permission.
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND
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* WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
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* OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF
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* PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD
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* PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF
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* THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE
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* OR PERFORMANCE OF THIS SOFTWARE.
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor clauses
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* in the FAR or the DOD or NASA FAR Supplement. Unpublished - rights
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* reserved under the copyright laws of the United States.
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* Contractor/manufacturer is:
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* Silicon Graphics, Inc.
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* 1500 Crittenden Lane
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* Mountain View, CA 94043
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* United State of America
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* OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
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* This program demonstrates using a three-dimensional texture.
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* It creates a 3D texture and then renders two rectangles
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* with different texture coordinates to obtain different
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* "slices" of the 3D texture.
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static GLubyte image[iDepth][iHeight][iWidth][3];
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static GLuint texName;
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/* Create a 16x16x16x3 array with different color values in
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* each array element [r, g, b]. Values range from 0 to 255.
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static void makeImage(void)
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for (s = 0; s < 16; s++)
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for (t = 0; t < 16; t++)
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for (r = 0; r < 16; r++) {
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image[r][t][s][0] = (GLubyte) (s * 17);
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image[r][t][s][1] = (GLubyte) (t * 17);
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image[r][t][s][2] = (GLubyte) (r * 17);
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static void init(void)
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glClearColor (0.0, 0.0, 0.0, 0.0);
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glShadeModel(GL_FLAT);
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glEnable(GL_DEPTH_TEST);
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glGenTextures(1, &texName);
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glBindTexture(GL_TEXTURE_3D, texName);
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glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP);
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glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER,
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glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER,
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glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, iWidth, iHeight,
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iDepth, 0, GL_RGB, GL_UNSIGNED_BYTE, image);
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glEnable(GL_TEXTURE_3D);
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static void display(void)
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glTexCoord3f(0.0, 0.0, 0.0); glVertex3f(-2.25, -1.0, 0.0);
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glTexCoord3f(0.0, 1.0, 0.0); glVertex3f(-2.25, 1.0, 0.0);
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glTexCoord3f(1.0, 1.0, 1.0); glVertex3f(-0.25, 1.0, 0.0);
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glTexCoord3f(1.0, 0.0, 1.0); glVertex3f(-0.25, -1.0, 0.0);
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glTexCoord3f(0.0, 0.0, 1.0); glVertex3f(0.25, -1.0, 0.0);
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glTexCoord3f(0.0, 1.0, 1.0); glVertex3f(0.25, 1.0, 0.0);
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glTexCoord3f(1.0, 1.0, 0.0); glVertex3f(2.25, 1.0, 0.0);
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glTexCoord3f(1.0, 0.0, 0.0); glVertex3f(2.25, -1.0, 0.0);
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static void reshape(int w, int h)
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glViewport(0, 0, (GLsizei) w, (GLsizei) h);
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glMatrixMode(GL_PROJECTION);
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gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 30.0);
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glMatrixMode(GL_MODELVIEW);
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glTranslatef(0.0, 0.0, -4.0);
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static void keyboard(unsigned char key, int x, int y)
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int main(int argc, char** argv)
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glutInit(&argc, argv);
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glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
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glutInitWindowSize(250, 250);
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glutInitWindowPosition(100, 100);
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glutCreateWindow(argv[0]);
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glutReshapeFunc(reshape);
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glutDisplayFunc(display);
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glutKeyboardFunc (keyboard);
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int main(int argc, char** argv)
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fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0 or 1.1.\n");
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fprintf (stderr, "If your implementation of OpenGL has the right extensions,\n");
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fprintf (stderr, "you may be able to modify this program to make it run.\n");