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31 * Unpublished-- rights reserved under the copyright laws of the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 *  colormat.c
40 *  After initialization, the program will be in
41 *  ColorMaterial mode.  Interaction:  pressing the
42 *  mouse buttons will change the diffuse reflection values.
43 */
44#include "glut_wrap.h"
45#include <stdlib.h>
46
47GLfloat diffuseMaterial[4] = { 0.5, 0.5, 0.5, 1.0 };
48
49/*  Initialize material property, light source, lighting model,
50 *  and depth buffer.
51 */
52static void init(void)
53{
54   GLfloat mat_specular[] = { 1.0, 1.0, 1.0, 1.0 };
55   GLfloat light_position[] = { 1.0, 1.0, 1.0, 0.0 };
56
57   glClearColor (0.0, 0.0, 0.0, 0.0);
58   glShadeModel (GL_SMOOTH);
59   glEnable(GL_DEPTH_TEST);
60   glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuseMaterial);
61   glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular);
62   glMaterialf(GL_FRONT, GL_SHININESS, 25.0);
63   glLightfv(GL_LIGHT0, GL_POSITION, light_position);
64   glEnable(GL_LIGHTING);
65   glEnable(GL_LIGHT0);
66
67   glColorMaterial(GL_FRONT, GL_DIFFUSE);
68   glEnable(GL_COLOR_MATERIAL);
69}
70
71static void display(void)
72{
73   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
74   glutSolidSphere(1.0, 20, 16);
75   glFlush ();
76}
77
78static void reshape (int w, int h)
79{
80   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
81   glMatrixMode (GL_PROJECTION);
82   glLoadIdentity();
83   if (w <= h)
84      glOrtho (-1.5, 1.5, -1.5*(GLfloat)h/(GLfloat)w,
85         1.5*(GLfloat)h/(GLfloat)w, -10.0, 10.0);
86   else
87      glOrtho (-1.5*(GLfloat)w/(GLfloat)h,
88         1.5*(GLfloat)w/(GLfloat)h, -1.5, 1.5, -10.0, 10.0);
89   glMatrixMode(GL_MODELVIEW);
90   glLoadIdentity();
91}
92
93/* ARGSUSED2 */
94static void mouse(int button, int state, int x, int y)
95{
96   switch (button) {
97      case GLUT_LEFT_BUTTON:
98         if (state == GLUT_DOWN) {
99            diffuseMaterial[0] += 0.1;
100            if (diffuseMaterial[0] > 1.0)
101               diffuseMaterial[0] = 0.0;
102            glColor4fv(diffuseMaterial);
103            glutPostRedisplay();
104         }
105         break;
106      case GLUT_MIDDLE_BUTTON:
107         if (state == GLUT_DOWN) {
108            diffuseMaterial[1] += 0.1;
109            if (diffuseMaterial[1] > 1.0)
110               diffuseMaterial[1] = 0.0;
111            glColor4fv(diffuseMaterial);
112            glutPostRedisplay();
113         }
114         break;
115      case GLUT_RIGHT_BUTTON:
116         if (state == GLUT_DOWN) {
117            diffuseMaterial[2] += 0.1;
118            if (diffuseMaterial[2] > 1.0)
119               diffuseMaterial[2] = 0.0;
120            glColor4fv(diffuseMaterial);
121            glutPostRedisplay();
122         }
123         break;
124      default:
125         break;
126   }
127}
128
129/* ARGSUSED1 */
130static void keyboard(unsigned char key, int x, int y)
131{
132   switch (key) {
133      case 27:
134         exit(0);
135         break;
136   }
137}
138
139int main(int argc, char** argv)
140{
141   glutInit(&argc, argv);
142   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
143   glutInitWindowSize (500, 500);
144   glutInitWindowPosition (100, 100);
145   glutCreateWindow (argv[0]);
146   init ();
147   glutDisplayFunc(display);
148   glutReshapeFunc(reshape);
149   glutMouseFunc(mouse);
150   glutKeyboardFunc(keyboard);
151   glutMainLoop();
152   return 0;
153}
154