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
31 #define CI_OFFSET_1 16
32 #define CI_OFFSET_2 32
37 static void Init(void)
39 static GLdouble plane[4] = { 0, 0, 1, 0 };
41 fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
42 fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
43 fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
45 glClearColor(0.0, 0.0, 1.0, 0.0);
46 glClipPlane(GL_CLIP_PLANE0, plane);
47 glEnable(GL_CLIP_PLANE0);
50 static void Reshape(int width, int height)
53 glViewport(0, 0, (GLint)width, (GLint)height);
55 glMatrixMode(GL_PROJECTION);
57 /* glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
58 glMatrixMode(GL_MODELVIEW);
61 static void Key(unsigned char key, int x, int y)
74 static void Draw(void)
76 glClear(GL_COLOR_BUFFER_BIT);
78 glBegin(GL_LINE_STRIP);
80 glVertex3f( 0.9, -0.9, 0.0);
82 glVertex3f( 0.9, 0.9, 0.0);
84 glVertex3f(-0.9, 0.0, 0.0);
86 glVertex3f( 0.9, -0.9, 0.0);
96 static GLenum Args(int argc, char **argv)
100 doubleBuffer = GL_FALSE;
102 for (i = 1; i < argc; i++) {
103 if (strcmp(argv[i], "-sb") == 0) {
104 doubleBuffer = GL_FALSE;
105 } else if (strcmp(argv[i], "-db") == 0) {
106 doubleBuffer = GL_TRUE;
108 fprintf(stderr, "%s (Bad option).\n", argv[i]);
115 int main(int argc, char **argv)
119 glutInit(&argc, argv);
121 if (Args(argc, argv) == GL_FALSE) {
125 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
127 type = GLUT_RGB | GLUT_ALPHA;
128 type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
129 glutInitDisplayMode(type);
131 if (glutCreateWindow(*argv) == GL_FALSE) {
137 glutReshapeFunc(Reshape);
138 glutKeyboardFunc(Key);
139 glutDisplayFunc(Draw);