2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that (i) the above copyright notices and this permission notice appear in
7 * all copies of the software and related documentation, and (ii) the name of
8 * Silicon Graphics may not be used in any advertising or
9 * publicity relating to the software without the specific, prior written
10 * permission of Silicon Graphics.
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
17 * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
18 * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
19 * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
20 * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
21 * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
35 # include <GLUT/glut.h>
41 static GLboolean doubleBuffer = GL_TRUE;
45 static void parseArgs(int argc, char** argv)
49 for (i = 1; i < argc; ++i) {
50 const char *arg = argv[i];
51 if (strcmp(arg, "-sb") == 0) {
52 doubleBuffer = GL_FALSE;
53 } else if (strcmp(arg, "-db") == 0) {
54 doubleBuffer = GL_TRUE;
56 fprintf(stderr, "error: unknown arg %s\n", arg);
66 glClearColor(0.3f, 0.1f, 0.3f, 1.0f);
71 Reshape(int width, int height)
73 glViewport(0, 0, width, height);
74 glMatrixMode(GL_PROJECTION);
76 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
77 glMatrixMode(GL_MODELVIEW);
84 glClear(GL_COLOR_BUFFER_BIT);
86 glBegin(GL_TRIANGLES);
88 glVertex3f(-0.9, -0.9, -30.0);
90 glVertex3f( 0.9, -0.9, -30.0);
92 glVertex3f( 0.0, 0.9, -30.0);
101 glutDestroyWindow(win);
108 main(int argc, char **argv)
112 parseArgs(argc, argv);
114 glutInit(&argc, argv);
116 glutInitWindowSize(250, 250);
118 type = GLUT_RGB | GLUT_ALPHA;
119 type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
120 glutInitDisplayMode(type);
122 win = glutCreateWindow(*argv);
129 glutReshapeFunc(Reshape);
130 glutDisplayFunc(Draw);