tri-lit-material.c revision 32001f49 
1/*
2 * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
3 *
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.
11 *
12 * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
13 * ANY KIND,
14 * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
15 * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
16 *
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
22 * OF THIS SOFTWARE.
23 */
24
25#include <stdio.h>
26#include <string.h>
27#include <stdlib.h>
28#include "glut_wrap.h"
29
30
31#define CI_OFFSET_1 16
32#define CI_OFFSET_2 32
33
34
35GLenum doubleBuffer;
36
37static void Init(void)
38{
39   fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
40   fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
41   fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
42   fflush(stderr);
43
44  glEnable(GL_LIGHTING);
45  glEnable(GL_LIGHT0);
46
47    glClearColor(0.0, 0.0, 1.0, 0.0);
48}
49
50static void Reshape(int width, int height)
51{
52
53    glViewport(0, 0, (GLint)width, (GLint)height);
54
55    glMatrixMode(GL_PROJECTION);
56    glLoadIdentity();
57/*     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0); */
58    glMatrixMode(GL_MODELVIEW);
59}
60
61static void Key(unsigned char key, int x, int y)
62{
63
64    switch (key) {
65      case 27:
66	exit(1);
67      default:
68	break;
69    }
70
71    glutPostRedisplay();
72}
73
74static void Draw(void)
75{
76   static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
77   static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
78   static GLfloat blue[4] = {0.2, 0.2, .9, 1.0};
79
80   glClear(GL_COLOR_BUFFER_BIT);
81
82   glBegin(GL_TRIANGLES);
83   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
84   glNormal3f(0,0,.7);
85   glVertex3f( 0.9, -0.9, -0.0);
86
87   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
88   glNormal3f(0,0,.8);
89   glVertex3f( 0.9,  0.9, -0.0);
90
91   glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
92   glNormal3f(0,0,.9);
93   glVertex3f(-0.9,  0.0, -0.0);
94   glEnd();
95
96   glFlush();
97
98   if (doubleBuffer) {
99      glutSwapBuffers();
100   }
101}
102
103static GLenum Args(int argc, char **argv)
104{
105    GLint i;
106
107    doubleBuffer = GL_FALSE;
108
109    for (i = 1; i < argc; i++) {
110        if (strcmp(argv[i], "-sb") == 0) {
111	    doubleBuffer = GL_FALSE;
112	} else if (strcmp(argv[i], "-db") == 0) {
113	    doubleBuffer = GL_TRUE;
114	} else {
115	    fprintf(stderr, "%s (Bad option).\n", argv[i]);
116	    return GL_FALSE;
117	}
118    }
119    return GL_TRUE;
120}
121
122int main(int argc, char **argv)
123{
124    GLenum type;
125
126    glutInit(&argc, argv);
127
128    if (Args(argc, argv) == GL_FALSE) {
129	exit(1);
130    }
131
132    glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
133
134    type = GLUT_RGB | GLUT_ALPHA;
135    type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
136    glutInitDisplayMode(type);
137
138    if (glutCreateWindow(*argv) == GL_FALSE) {
139	exit(1);
140    }
141
142    Init();
143
144    glutReshapeFunc(Reshape);
145    glutKeyboardFunc(Key);
146    glutDisplayFunc(Draw);
147    glutMainLoop();
148	return 0;
149}
150