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 GLenum doubleBuffer
= 1;
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
));
39 glClearColor(0.3, 0.1, 0.3, 0.0);
42 static void Reshape(int width
, int height
)
44 glViewport(width
/ -2.0, height
/ -2.0, width
, height
);
46 glMatrixMode(GL_PROJECTION
);
48 glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
49 glMatrixMode(GL_MODELVIEW
);
53 static void Key(unsigned char key
, int x
, int y
)
64 static void Draw(void)
66 glClear(GL_COLOR_BUFFER_BIT
);
68 glBegin(GL_TRIANGLES
);
70 glVertex3f(-0.9, 0.9, -30.0);
72 glVertex3f( 0.9, 0.9, -30.0);
74 glVertex3f( 0.0, -0.9, -30.0);
84 static GLenum
Args(int argc
, char **argv
)
88 for (i
= 1; i
< argc
; i
++) {
89 if (strcmp(argv
[i
], "-sb") == 0) {
90 doubleBuffer
= GL_FALSE
;
91 } else if (strcmp(argv
[i
], "-db") == 0) {
92 doubleBuffer
= GL_TRUE
;
94 fprintf(stderr
, "%s (Bad option).\n", argv
[i
]);
101 int main(int argc
, char **argv
)
105 glutInit(&argc
, argv
);
107 if (Args(argc
, argv
) == GL_FALSE
) {
111 glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
113 type
= GLUT_RGB
| GLUT_ALPHA
;
114 type
|= (doubleBuffer
) ? GLUT_DOUBLE
: GLUT_SINGLE
;
115 glutInitDisplayMode(type
);
117 win
= glutCreateWindow(*argv
);
124 glutReshapeFunc(Reshape
);
125 glutKeyboardFunc(Key
);
126 glutDisplayFunc(Draw
);