diff options
Diffstat (limited to 'progs/redbook/texture3d.c')
| -rw-r--r-- | progs/redbook/texture3d.c | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/progs/redbook/texture3d.c b/progs/redbook/texture3d.c new file mode 100644 index 00000000000..9f57e08c6d9 --- /dev/null +++ b/progs/redbook/texture3d.c @@ -0,0 +1,161 @@ +/* + * Copyright (c) 1993-2003, Silicon Graphics, Inc. + * All Rights Reserved + * + * Permission to use, copy, modify, and distribute this software for any + * purpose and without fee is hereby granted, provided that the above + * copyright notice appear in all copies and that both the copyright + * notice and this permission notice appear in supporting documentation, + * and that the name of Silicon Graphics, Inc. not be used in + * advertising or publicity pertaining to distribution of the software + * without specific, written prior permission. + * + * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND + * WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, + * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR + * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON + * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, + * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, + * OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF + * PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD + * PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF + * THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF + * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE + * OR PERFORMANCE OF THIS SOFTWARE. + * + * US Government Users Restricted Rights + * Use, duplication, or disclosure by the Government is subject to + * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph + * (c)(1)(ii) of the Rights in Technical Data and Computer Software + * clause at DFARS 252.227-7013 and/or in similar or successor clauses + * in the FAR or the DOD or NASA FAR Supplement. Unpublished - rights + * reserved under the copyright laws of the United States. + * + * Contractor/manufacturer is: + * Silicon Graphics, Inc. + * 1500 Crittenden Lane + * Mountain View, CA 94043 + * United State of America + * + * OpenGL(R) is a registered trademark of Silicon Graphics, Inc. + */ + +/* texture3d.c + * This program demonstrates using a three-dimensional texture. + * It creates a 3D texture and then renders two rectangles + * with different texture coordinates to obtain different + * "slices" of the 3D texture. + */ +#include <GL/glut.h> +#include <stdlib.h> +#include <stdio.h> + +#ifdef GL_VERSION_1_2 +#define iWidth 16 +#define iHeight 16 +#define iDepth 16 + +static GLubyte image[iDepth][iHeight][iWidth][3]; +static GLuint texName; + +/* Create a 16x16x16x3 array with different color values in + * each array element [r, g, b]. Values range from 0 to 255. + */ + +static void makeImage(void) +{ + int s, t, r; + + for (s = 0; s < 16; s++) + for (t = 0; t < 16; t++) + for (r = 0; r < 16; r++) { + image[r][t][s][0] = (GLubyte) (s * 17); + image[r][t][s][1] = (GLubyte) (t * 17); + image[r][t][s][2] = (GLubyte) (r * 17); + } +} + +static void init(void) +{ + glClearColor (0.0, 0.0, 0.0, 0.0); + glShadeModel(GL_FLAT); + glEnable(GL_DEPTH_TEST); + + makeImage(); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + glGenTextures(1, &texName); + glBindTexture(GL_TEXTURE_3D, texName); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, + GL_NEAREST); + glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, + GL_NEAREST); + glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB, iWidth, iHeight, + iDepth, 0, GL_RGB, GL_UNSIGNED_BYTE, image); + glEnable(GL_TEXTURE_3D); +} + +static void display(void) +{ + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glBegin(GL_QUADS); + glTexCoord3f(0.0, 0.0, 0.0); glVertex3f(-2.25, -1.0, 0.0); + glTexCoord3f(0.0, 1.0, 0.0); glVertex3f(-2.25, 1.0, 0.0); + glTexCoord3f(1.0, 1.0, 1.0); glVertex3f(-0.25, 1.0, 0.0); + glTexCoord3f(1.0, 0.0, 1.0); glVertex3f(-0.25, -1.0, 0.0); + + glTexCoord3f(0.0, 0.0, 1.0); glVertex3f(0.25, -1.0, 0.0); + glTexCoord3f(0.0, 1.0, 1.0); glVertex3f(0.25, 1.0, 0.0); + glTexCoord3f(1.0, 1.0, 0.0); glVertex3f(2.25, 1.0, 0.0); + glTexCoord3f(1.0, 0.0, 0.0); glVertex3f(2.25, -1.0, 0.0); + glEnd(); + glFlush(); +} + +static void reshape(int w, int h) +{ + glViewport(0, 0, (GLsizei) w, (GLsizei) h); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 30.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -4.0); +} + +static void keyboard(unsigned char key, int x, int y) +{ + switch (key) { + case 27: + exit(0); + break; + } +} + +int main(int argc, char** argv) +{ + glutInit(&argc, argv); + glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); + glutInitWindowSize(250, 250); + glutInitWindowPosition(100, 100); + glutCreateWindow(argv[0]); + init(); + glutReshapeFunc(reshape); + glutDisplayFunc(display); + glutKeyboardFunc (keyboard); + glutMainLoop(); + return 0; +} +#else +int main(int argc, char** argv) +{ + fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0 or 1.1.\n"); + fprintf (stderr, "If your implementation of OpenGL has the right extensions,\n"); + fprintf (stderr, "you may be able to modify this program to make it run.\n"); + return 0; +} +#endif + |