1 /*
2 * Copyright (c) 1993-1997, Silicon Graphics, Inc.
3 * ALL RIGHTS RESERVED
4 * Permission to use, copy, modify, and distribute this software for
5 * any purpose and without fee is hereby granted, provided that the above
6 * copyright notice appear in all copies and that both the copyright notice
7 * and this permission notice appear in supporting documentation, and that
8 * the name of Silicon Graphics, Inc. not be used in advertising
9 * or publicity pertaining to distribution of the software without specific,
10 * written prior permission.
11 *
12 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
13 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
14 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
15 * FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
16 * GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
17 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
18 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
19 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
20 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
21 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
22 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
23 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
24 *
25 * US Government Users Restricted Rights
26 * Use, duplication, or disclosure by the Government is subject to
27 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
28 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
29 * clause at DFARS 252.227-7013 and/or in similar or successor
30 * clauses in the FAR or the DOD or NASA FAR Supplement.
31 * Unpublished-- rights reserved under the copyright laws of the
32 * United States. Contractor/manufacturer is Silicon Graphics,
33 * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
34 *
35 * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
36 */
37
38 /*
39 * hello.c
40 * This is a simple, introductory OpenGL program.
41 */
42 #include <stdlib.h>
43 #include "glut_wrap.h"
44
display(void)45 static void display(void)
46 {
47 /* clear all pixels */
48 glClear (GL_COLOR_BUFFER_BIT);
49
50 /* draw white polygon (rectangle) with corners at
51 * (0.25, 0.25, 0.0) and (0.75, 0.75, 0.0)
52 */
53 glColor3f (1.0, 1.0, 1.0);
54 glBegin(GL_POLYGON);
55 glVertex3f (0.25, 0.25, 0.0);
56 glVertex3f (0.75, 0.25, 0.0);
57 glVertex3f (0.75, 0.75, 0.0);
58 glVertex3f (0.25, 0.75, 0.0);
59 glEnd();
60
61 /* don't wait!
62 * start processing buffered OpenGL routines
63 */
64 glFlush ();
65 }
66
init(void)67 static void init (void)
68 {
69 /* select clearing color */
70 glClearColor (0.0, 0.0, 0.0, 0.0);
71
72 /* initialize viewing values */
73 glMatrixMode(GL_PROJECTION);
74 glLoadIdentity();
75 glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
76 }
77
78 static void
key(unsigned char k,int x,int y)79 key(unsigned char k, int x, int y)
80 {
81 switch (k) {
82 case 27: /* Escape */
83 exit(0);
84 break;
85 default:
86 return;
87 }
88 glutPostRedisplay();
89 }
90
91 /*
92 * Declare initial window size, position, and display mode
93 * (single buffer and RGBA). Open window with "hello"
94 * in its title bar. Call initialization routines.
95 * Register callback function to display graphics.
96 * Enter main loop and process events.
97 */
main(int argc,char ** argv)98 int main(int argc, char** argv)
99 {
100 glutInit(&argc, argv);
101 glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
102 glutInitWindowSize (250, 250);
103 glutInitWindowPosition (100, 100);
104 glutCreateWindow ("hello");
105 init ();
106 glutDisplayFunc(display);
107 glutKeyboardFunc(key);
108 glutMainLoop();
109 return 0; /* ANSI C requires main to return int. */
110 }
111