progs/trivial/dlist-tri-mat-tri.c

   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 <GL/glut.h>
  29
  30
  31 #define CI_OFFSET_1 16
  32 #define CI_OFFSET_2 32
  33
  34
  35 GLenum doubleBuffer;
  36 GLint list;
  37
  38 static GLfloat red[4] = {0.8, 0.1, 0.0, 1.0};
  39 static GLfloat green[4] = {0.0, 0.8, 0.2, 1.0};
  40 static GLfloat blue[4] = {0.2, 0.2, .9, 1.0};
  41
  42 static void Init(void)
  43 {
  44    fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
  45    fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
  46    fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
  47    fflush(stderr);
  48
  49    glClear(GL_COLOR_BUFFER_BIT);
  50
  51    glEnable(GL_LIGHTING);
  52    glEnable(GL_LIGHT0);
  53
  54    glClearColor(0.0, 0.0, 1.0, 0.0);
  55
  56    list = glGenLists(1);
  57    glNewList(list, GL_COMPILE);
  58
  59    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, green);
  60
  61    glBegin(GL_TRIANGLES);
  62    glNormal3f(0,0,.7);
  63    glVertex3f( 0.9, -0.9, -30.0);
  64    glVertex3f( 0.9,  0.9, -30.0);
  65    glVertex3f(-0.9,  0.0, -30.0);
  66    glEnd();
  67
  68    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
  69
  70    glBegin(GL_TRIANGLES);
  71    glVertex3f( -0.9,  0.9, -30.0);
  72    glVertex3f( -0.9, -0.9, -30.0);
  73    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, red);
  74    glVertex3f(  0.9,  0.0, -30.0);
  75    glEnd();
  76
  77    glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, blue);
  78    glBegin(GL_TRIANGLES);
  79    glVertex3f( -0.5,  0.5, -30.0);
  80    glVertex3f( -0.5, -0.5, -30.0);
  81    glVertex3f(  0.5,  0.0, -30.0);
  82    glEnd();
  83
  84    glEndList();
  85 }
  86
  87 static void Reshape(int width, int height)
  88 {
  89
  90     glViewport(0, 0, (GLint)width, (GLint)height);
  91
  92     glMatrixMode(GL_PROJECTION);
  93     glLoadIdentity();
  94     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  95     glMatrixMode(GL_MODELVIEW);
  96 }
  97
  98 static void Key(unsigned char key, int x, int y)
  99 {
 100
 101     switch (key) {
 102       case 27:
 103         exit(1);
 104       default:
 105         break;
 106     }
 107
 108     glutPostRedisplay();
 109 }
 110
 111
 112
 113
 114 static void Draw(void)
 115 {
 116    glClear(GL_COLOR_BUFFER_BIT);
 117
 118    glShadeModel( GL_SMOOTH );
 119    glCallList(list);
 120
 121    glFlush();
 122
 123    if (doubleBuffer) {
 124       glutSwapBuffers();
 125    }
 126 }
 127
 128 static GLenum Args(int argc, char **argv)
 129 {
 130     GLint i;
 131
 132     doubleBuffer = GL_FALSE;
 133
 134     for (i = 1; i < argc; i++) {
 135         if (strcmp(argv[i], "-sb") == 0) {
 136             doubleBuffer = GL_FALSE;
 137         } else if (strcmp(argv[i], "-db") == 0) {
 138             doubleBuffer = GL_TRUE;
 139         } else {
 140             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 141             return GL_FALSE;
 142         }
 143     }
 144     return GL_TRUE;
 145 }
 146
 147 int main(int argc, char **argv)
 148 {
 149     GLenum type;
 150
 151     glutInit(&argc, argv);
 152
 153     if (Args(argc, argv) == GL_FALSE) {
 154         exit(1);
 155     }
 156
 157     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 158
 159     type = GLUT_RGB | GLUT_ALPHA;
 160     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 161     glutInitDisplayMode(type);
 162
 163     if (glutCreateWindow(*argv) == GL_FALSE) {
 164         exit(1);
 165     }
 166
 167     Init();
 168
 169     glutReshapeFunc(Reshape);
 170     glutKeyboardFunc(Key);
 171     glutDisplayFunc(Draw);
 172     glutMainLoop();
 173         return 0;
 174 }