jtg | afb833d | 1999-08-19 00:55:39 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1993-1997, Silicon Graphics, Inc. |
| 3 | * ALL RIGHTS RESERVED |
| 4 | * Permission to use, copy, modify, and distribute this software for |
| 5 | * any purpose and without fee is hereby granted, provided that the above |
| 6 | * copyright notice appear in all copies and that both the copyright notice |
| 7 | * and this permission notice appear in supporting documentation, and that |
| 8 | * the name of Silicon Graphics, Inc. not be used in advertising |
| 9 | * or publicity pertaining to distribution of the software without specific, |
| 10 | * written prior permission. |
| 11 | * |
| 12 | * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" |
| 13 | * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, |
| 14 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON |
| 16 | * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT, |
| 17 | * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY |
| 18 | * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, |
| 19 | * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF |
| 20 | * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN |
| 21 | * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON |
| 22 | * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE |
| 23 | * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. |
| 24 | * |
| 25 | * US Government Users Restricted Rights |
| 26 | * Use, duplication, or disclosure by the Government is subject to |
| 27 | * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph |
| 28 | * (c)(1)(ii) of the Rights in Technical Data and Computer Software |
| 29 | * clause at DFARS 252.227-7013 and/or in similar or successor |
| 30 | * clauses in the FAR or the DOD or NASA FAR Supplement. |
| 31 | * Unpublished-- rights reserved under the copyright laws of the |
| 32 | * United States. Contractor/manufacturer is Silicon Graphics, |
| 33 | * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311. |
| 34 | * |
| 35 | * OpenGL(R) is a registered trademark of Silicon Graphics, Inc. |
| 36 | */ |
| 37 | |
| 38 | /* |
| 39 | * light.c |
| 40 | * This program demonstrates the use of the OpenGL lighting |
| 41 | * model. A sphere is drawn using a grey material characteristic. |
| 42 | * A single light source illuminates the object. |
| 43 | */ |
| 44 | #include <GL/glut.h> |
| 45 | #include <stdlib.h> |
| 46 | |
| 47 | /* Initialize material property, light source, lighting model, |
| 48 | * and depth buffer. |
| 49 | */ |
| 50 | void init(void) |
| 51 | { |
| 52 | GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 }; |
| 53 | GLfloat mat_shininess[] = { 50.0 }; |
| 54 | GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 }; |
| 55 | |
| 56 | glClearColor (0.0, 0.0, 0.0, 0.0); |
| 57 | glShadeModel (GL_SMOOTH); |
| 58 | |
| 59 | glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); |
| 60 | glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); |
| 61 | glLightfv(GL_LIGHT0, GL_POSITION, light_position); |
| 62 | |
| 63 | glEnable(GL_LIGHTING); |
| 64 | glEnable(GL_LIGHT0); |
| 65 | glEnable(GL_DEPTH_TEST); |
| 66 | } |
| 67 | |
| 68 | void display(void) |
| 69 | { |
| 70 | glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
| 71 | glutSolidSphere (1.0, 20, 16); |
| 72 | glFlush (); |
| 73 | } |
| 74 | |
| 75 | void reshape (int w, int h) |
| 76 | { |
| 77 | glViewport (0, 0, (GLsizei) w, (GLsizei) h); |
| 78 | glMatrixMode (GL_PROJECTION); |
| 79 | glLoadIdentity(); |
| 80 | if (w <= h) |
| 81 | glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w, |
| 82 | 1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0); |
| 83 | else |
| 84 | glOrtho (-1.5*(GLfloat)w/(GLfloat)h, |
| 85 | 1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0); |
| 86 | glMatrixMode(GL_MODELVIEW); |
| 87 | glLoadIdentity(); |
| 88 | } |
| 89 | |
| 90 | /* ARGSUSED1 */ |
| 91 | void keyboard(unsigned char key, int x, int y) |
| 92 | { |
| 93 | switch (key) { |
| 94 | case 27: |
| 95 | exit(0); |
| 96 | break; |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | int main(int argc, char** argv) |
| 101 | { |
| 102 | glutInit(&argc, argv); |
| 103 | glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH); |
| 104 | glutInitWindowSize (500, 500); |
| 105 | glutInitWindowPosition (100, 100); |
| 106 | glutCreateWindow (argv[0]); |
| 107 | init (); |
| 108 | glutDisplayFunc(display); |
| 109 | glutReshapeFunc(reshape); |
| 110 | glutKeyboardFunc(keyboard); |
| 111 | glutMainLoop(); |
| 112 | return 0; |
| 113 | } |