progs/trivial/tri-dlist.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 void Init(void)
  39 {
  40    fprintf(stderr, "GL_RENDERER   = %s\n", (char *) glGetString(GL_RENDERER));
  41    fprintf(stderr, "GL_VERSION    = %s\n", (char *) glGetString(GL_VERSION));
  42    fprintf(stderr, "GL_VENDOR     = %s\n", (char *) glGetString(GL_VENDOR));
  43
  44    glClearColor(0.0, 0.0, 1.0, 0.0);
  45
  46    list = glGenLists(1);
  47    glNewList(list, GL_COMPILE);
  48    glBegin(GL_TRIANGLES);
  49 /*    glColor3f(0,0,.7);  */
  50    glVertex3f( 0.9, -0.9, -30.0);
  51 /*    glColor3f(.8,0,0);  */
  52    glVertex3f( 0.9,  0.9, -30.0);
  53 /*    glColor3f(0,.9,0);  */
  54    glVertex3f(-0.9,  0.0, -30.0);
  55    glEnd();
  56    glEndList();
  57 }
  58
  59 static void Reshape(int width, int height)
  60 {
  61
  62     glViewport(0, 0, (GLint)width, (GLint)height);
  63
  64     glMatrixMode(GL_PROJECTION);
  65     glLoadIdentity();
  66     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  67     glMatrixMode(GL_MODELVIEW);
  68 }
  69
  70 static void Key(unsigned char key, int x, int y)
  71 {
  72
  73     switch (key) {
  74       case 27:
  75         exit(1);
  76       default:
  77         return;
  78     }
  79
  80     glutPostRedisplay();
  81 }
  82
  83
  84
  85
  86 static void Draw(void)
  87 {
  88    glClear(GL_COLOR_BUFFER_BIT);
  89
  90    glColor3f(0,.9,0);
  91    glCallList(list);
  92
  93    glRotatef(45,0,0,1);
  94    glColor3f(1,0,1);
  95    glCallList(list);
  96
  97    glFlush();
  98
  99    if (doubleBuffer) {
 100       glutSwapBuffers();
 101    }
 102 }
 103
 104 static GLenum Args(int argc, char **argv)
 105 {
 106     GLint i;
 107
 108     doubleBuffer = GL_FALSE;
 109
 110     for (i = 1; i < argc; i++) {
 111         if (strcmp(argv[i], "-sb") == 0) {
 112             doubleBuffer = GL_FALSE;
 113         } else if (strcmp(argv[i], "-db") == 0) {
 114             doubleBuffer = GL_TRUE;
 115         } else {
 116             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 117             return GL_FALSE;
 118         }
 119     }
 120     return GL_TRUE;
 121 }
 122
 123 int main(int argc, char **argv)
 124 {
 125     GLenum type;
 126
 127     glutInit(&argc, argv);
 128
 129     if (Args(argc, argv) == GL_FALSE) {
 130         exit(1);
 131     }
 132
 133     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 134
 135     type = GLUT_RGB | GLUT_ALPHA;
 136     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 137     glutInitDisplayMode(type);
 138
 139     if (glutCreateWindow("First Tri") == GL_FALSE) {
 140         exit(1);
 141     }
 142
 143     Init();
 144
 145     glutReshapeFunc(Reshape);
 146     glutKeyboardFunc(Key);
 147     glutDisplayFunc(Draw);
 148     glutMainLoop();
 149         return 0;
 150 }