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-
-/* Copyright (c) Mark J. Kilgard, 1994. */
-
-/*
- * (c) Copyright 1993, 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- * Unpublished-- rights reserved under the copyright laws of the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., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
-/*
- * scenebamb.c
- * This program demonstrates use of a blue ambient light
- * source.
- */
-#include <stdlib.h>
-#include <GL/glut.h>
-
-/* Initialize light source and lighting.
- */
-static void myinit(void)
-{
- GLfloat light_ambient[] = { 0.0, 0.0, 1.0, 1.0 };
- GLfloat light_diffuse[] = { 1.0, 1.0, 1.0, 1.0 };
- GLfloat light_specular[] = { 1.0, 1.0, 1.0, 1.0 };
-/* light_position is NOT default value */
- GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
-
- glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient);
- glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
- glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);
- glLightfv(GL_LIGHT0, GL_POSITION, light_position);
-
- glEnable(GL_LIGHTING);
- glEnable(GL_LIGHT0);
- glDepthFunc(GL_LESS);
- glEnable(GL_DEPTH_TEST);
-}
-
-static void display(void)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix ();
- glRotatef (20.0, 1.0, 0.0, 0.0);
-
- glPushMatrix ();
- glTranslatef (-0.75, 0.5, 0.0);
- glRotatef (90.0, 1.0, 0.0, 0.0);
- glutSolidTorus (0.275, 0.85, 15, 15);
- glPopMatrix ();
-
- glPushMatrix ();
- glTranslatef (-0.75, -0.5, 0.0);
- glRotatef (270.0, 1.0, 0.0, 0.0);
- glutSolidCone (1.0, 2.0, 15, 15);
- glPopMatrix ();
-
- glPushMatrix ();
- glTranslatef (0.75, 0.0, -1.0);
- glutSolidSphere (1.0, 15, 15);
- glPopMatrix ();
-
- glPopMatrix ();
- glFlush();
-}
-
-static void myReshape(int w, int h)
-{
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w <= h)
- glOrtho (-2.5, 2.5, -2.5*(GLfloat)h/(GLfloat)w,
- 2.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
- else
- glOrtho (-2.5*(GLfloat)w/(GLfloat)h,
- 2.5*(GLfloat)w/(GLfloat)h, -2.5, 2.5, -10.0, 10.0);
- glMatrixMode(GL_MODELVIEW);
-}
-
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27: /* Escape */
- exit(0);
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-/* Main Loop
- * Open window with initial window size, title bar,
- * RGBA display mode, and handle input events.
- */
-int main(int argc, char** argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize (500, 500);
- glutCreateWindow (argv[0]);
- myinit();
- glutReshapeFunc (myReshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}