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+/*
+ * 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 Unpublished - rights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.
+ */
+
+/* cubemap.c
+ *
+ * This program demonstrates cube map textures.
+ * Six different colored checker board textures are
+ * created and applied to a lit sphere.
+ *
+ * Pressing the 'f' and 'b' keys translate the viewer
+ * forward and backward.
+ */
+
+#include <GL/glut.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define imageSize 4
+static GLubyte image1[imageSize][imageSize][4];
+static GLubyte image2[imageSize][imageSize][4];
+static GLubyte image3[imageSize][imageSize][4];
+static GLubyte image4[imageSize][imageSize][4];
+static GLubyte image5[imageSize][imageSize][4];
+static GLubyte image6[imageSize][imageSize][4];
+
+static GLdouble ztrans = 0.0;
+
+static void makeImages(void)
+{
+ int i, j, c;
+
+ for (i = 0; i < imageSize; i++) {
+ for (j = 0; j < imageSize; j++) {
+ c = ( ((i & 0x1) == 0) ^ ((j & 0x1) == 0) ) * 255;
+ image1[i][j][0] = (GLubyte) c;
+ image1[i][j][1] = (GLubyte) c;
+ image1[i][j][2] = (GLubyte) c;
+ image1[i][j][3] = (GLubyte) 255;
+
+ image2[i][j][0] = (GLubyte) c;
+ image2[i][j][1] = (GLubyte) c;
+ image2[i][j][2] = (GLubyte) 0;
+ image2[i][j][3] = (GLubyte) 255;
+
+ image3[i][j][0] = (GLubyte) c;
+ image3[i][j][1] = (GLubyte) 0;
+ image3[i][j][2] = (GLubyte) c;
+ image3[i][j][3] = (GLubyte) 255;
+
+ image4[i][j][0] = (GLubyte) 0;
+ image4[i][j][1] = (GLubyte) c;
+ image4[i][j][2] = (GLubyte) c;
+ image4[i][j][3] = (GLubyte) 255;
+
+ image5[i][j][0] = (GLubyte) 255;
+ image5[i][j][1] = (GLubyte) c;
+ image5[i][j][2] = (GLubyte) c;
+ image5[i][j][3] = (GLubyte) 255;
+
+ image6[i][j][0] = (GLubyte) c;
+ image6[i][j][1] = (GLubyte) c;
+ image6[i][j][2] = (GLubyte) 255;
+ image6[i][j][3] = (GLubyte) 255;
+ }
+ }
+}
+
+static void init(void)
+{
+ GLfloat diffuse[4] = {1.0, 1.0, 1.0, 1.0};
+
+ glClearColor (0.0, 0.0, 0.0, 0.0);
+ glEnable(GL_DEPTH_TEST);
+ glShadeModel(GL_SMOOTH);
+
+ makeImages();
+ glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_WRAP_S, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_WRAP_T, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_WRAP_R, GL_REPEAT);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_CUBE_MAP_EXT, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_X_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image1);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image4);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image2);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image5);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image3);
+ glTexImage2D(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_EXT, 0, GL_RGBA, imageSize,
+ imageSize, 0, GL_RGBA, GL_UNSIGNED_BYTE, image6);
+ glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_EXT);
+ glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_EXT);
+ glTexGeni(GL_R, GL_TEXTURE_GEN_MODE, GL_NORMAL_MAP_EXT);
+ glEnable(GL_TEXTURE_GEN_S);
+ glEnable(GL_TEXTURE_GEN_T);
+ glEnable(GL_TEXTURE_GEN_R);
+
+ glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
+
+ glEnable(GL_TEXTURE_CUBE_MAP_EXT);
+ glEnable(GL_LIGHTING);
+ glEnable(GL_LIGHT0);
+ glEnable(GL_AUTO_NORMAL);
+ glEnable(GL_NORMALIZE);
+ glMaterialfv (GL_FRONT, GL_DIFFUSE, diffuse);
+}
+
+static void display(void)
+{
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+ glPushMatrix ();
+ glTranslatef (0.0, 0.0, ztrans);
+ glutSolidSphere (5.0, 20, 10);
+ glPopMatrix ();
+ glutSwapBuffers();
+}
+
+static void reshape(int w, int h)
+{
+ glViewport(0, 0, (GLsizei) w, (GLsizei) h);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ gluPerspective(40.0, (GLfloat) w/(GLfloat) h, 1.0, 300.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0.0, 0.0, -20.0);
+}
+
+static void keyboard (unsigned char key, int x, int y)
+{
+ switch (key) {
+ case 'f':
+ ztrans = ztrans - 0.2;
+ glutPostRedisplay();
+ break;
+ case 'b':
+ ztrans = ztrans + 0.2;
+ glutPostRedisplay();
+ break;
+ case 27:
+ exit(0);
+ break;
+ default:
+ break;
+ }
+}
+
+int main(int argc, char** argv)
+{
+ glutInit(&argc, argv);
+ glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
+ glutInitWindowSize(400, 400);
+ glutInitWindowPosition(100, 100);
+ glutCreateWindow (argv[0]);
+ init ();
+ glutDisplayFunc(display);
+ glutReshapeFunc(reshape);
+ glutKeyboardFunc(keyboard);
+ glutMainLoop();
+ return 0;
+}
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