/* * 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. 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Unpublished - rights * reserved under the copyright laws of the United States.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 #include #include #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; }