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
30 static GLenum doubleBuffer;
31 static GLenum frontface = GL_CCW;
33 static void Init(void)
35 fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
36 fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
37 fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
40 static void Reshape(int width, int height)
42 glViewport(0, 0, (GLint)width, (GLint)height);
44 glMatrixMode(GL_PROJECTION);
46 /* glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
47 glMatrixMode(GL_MODELVIEW);
50 static void Key(unsigned char key, int x, int y)
54 frontface = (frontface == GL_CCW) ? GL_CW : GL_CCW;
55 glFrontFace(frontface);
66 static void Draw(void)
68 glClear(GL_COLOR_BUFFER_BIT);
69 glPolygonMode(GL_FRONT, GL_LINE);
70 glPolygonMode(GL_BACK, GL_POINT);
72 glBegin(GL_TRIANGLES);
74 glColor3f(0.3,0.3,.9);
75 glVertex3f( 0.9, -0.9, -0.0);
78 glVertex3f( 0.9, 0.9, -0.0);
81 glVertex3f(-0.9, 0.0, -0.0);
91 static GLenum Args(int argc, char **argv)
95 doubleBuffer = GL_FALSE;
97 for (i = 1; i < argc; i++) {
98 if (strcmp(argv[i], "-sb") == 0) {
99 doubleBuffer = GL_FALSE;
100 } else if (strcmp(argv[i], "-db") == 0) {
101 doubleBuffer = GL_TRUE;
103 fprintf(stderr, "%s (Bad option).\n", argv[i]);
110 int main(int argc, char **argv)
114 glutInit(&argc, argv);
116 if (Args(argc, argv) == GL_FALSE) {
120 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
122 type = GLUT_RGB | GLUT_ALPHA;
123 type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
124 glutInitDisplayMode(type);
126 if (glutCreateWindow(*argv) == GL_FALSE) {
132 glutReshapeFunc(Reshape);
133 glutKeyboardFunc(Key);
134 glutDisplayFunc(Draw);