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("First Tri") == GL_FALSE
) {
132 glutReshapeFunc(Reshape
);
133 glutKeyboardFunc(Key
);
134 glutDisplayFunc(Draw
);