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31 * Unpublished-- rights reserved under the copyright laws of the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 * smooth.c
40 * This program demonstrates smooth shading.
41 * A smooth shaded polygon is drawn in a 2-D projection.
42 */
43#include "glut_wrap.h"
44#include <stdlib.h>
45
46static void init(void)
47{
48   glClearColor (0.0, 0.0, 0.0, 0.0);
49   glShadeModel (GL_SMOOTH);
50}
51
52static void triangle(void)
53{
54   glBegin (GL_TRIANGLES);
55   glColor3f (1.0, 0.0, 0.0);
56   glVertex2f (5.0, 5.0);
57   glColor3f (0.0, 1.0, 0.0);
58   glVertex2f (25.0, 5.0);
59   glColor3f (0.0, 0.0, 1.0);
60   glVertex2f (5.0, 25.0);
61   glEnd();
62}
63
64static void display(void)
65{
66   glClear (GL_COLOR_BUFFER_BIT);
67   triangle ();
68   glFlush ();
69}
70
71static void reshape (int w, int h)
72{
73   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
74   glMatrixMode (GL_PROJECTION);
75   glLoadIdentity ();
76   if (w <= h)
77      gluOrtho2D (0.0, 30.0, 0.0, 30.0 * (GLfloat) h/(GLfloat) w);
78   else
79      gluOrtho2D (0.0, 30.0 * (GLfloat) w/(GLfloat) h, 0.0, 30.0);
80   glMatrixMode(GL_MODELVIEW);
81}
82
83/* ARGSUSED1 */
84static void keyboard(unsigned char key, int x, int y)
85{
86   switch (key) {
87      case 27:
88         exit(0);
89         break;
90   }
91}
92
93int main(int argc, char** argv)
94{
95   glutInit(&argc, argv);
96   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
97   glutInitWindowSize (500, 500);
98   glutInitWindowPosition (100, 100);
99   glutCreateWindow (argv[0]);
100   init ();
101   glutDisplayFunc(display);
102   glutReshapeFunc(reshape);
103   glutKeyboardFunc (keyboard);
104   glutMainLoop();
105   return 0;
106}
107