progs/trivial/dlist-edgeflag.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    fflush(stderr);
  44
  45    glClearColor(0.0, 0.0, 1.0, 0.0);
  46
  47    glPolygonMode(GL_FRONT, GL_LINE);
  48    glPolygonMode(GL_BACK, GL_POINT);
  49
  50    list = glGenLists(1);
  51    glNewList(list, GL_COMPILE);
  52    glBegin(GL_TRIANGLES);
  53    glEdgeFlag(1);
  54 /*    glColor3f(0,0,.7);  */
  55    glVertex3f( 0.9, -0.9, -30.0);
  56    glEdgeFlag(0);
  57 /*    glColor3f(.8,0,0);  */
  58    glVertex3f( 0.9,  0.9, -30.0);
  59    glEdgeFlag(1);
  60 /*    glColor3f(0,.9,0);  */
  61    glVertex3f(-0.9,  0.0, -30.0);
  62    glEnd();
  63    glEndList();
  64 }
  65
  66 static void Reshape(int width, int height)
  67 {
  68
  69     glViewport(0, 0, (GLint)width, (GLint)height);
  70
  71     glMatrixMode(GL_PROJECTION);
  72     glLoadIdentity();
  73     glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
  74     glMatrixMode(GL_MODELVIEW);
  75 }
  76
  77 static void Key(unsigned char key, int x, int y)
  78 {
  79
  80     switch (key) {
  81       case 27:
  82         exit(1);
  83       default:
  84         break;
  85     }
  86
  87     glutPostRedisplay();
  88 }
  89
  90
  91
  92
  93 static void Draw(void)
  94 {
  95    glClear(GL_COLOR_BUFFER_BIT);
  96
  97    glPushMatrix();
  98    glColor3f(0,.9,0);
  99    glCallList(list);
 100
 101    glRotatef(45,0,0,1);
 102    glColor3f(1,0,1);
 103    glCallList(list);
 104    glPopMatrix();
 105
 106    glFlush();
 107
 108    if (doubleBuffer) {
 109       glutSwapBuffers();
 110    }
 111 }
 112
 113 static GLenum Args(int argc, char **argv)
 114 {
 115     GLint i;
 116
 117     doubleBuffer = GL_FALSE;
 118
 119     for (i = 1; i < argc; i++) {
 120         if (strcmp(argv[i], "-sb") == 0) {
 121             doubleBuffer = GL_FALSE;
 122         } else if (strcmp(argv[i], "-db") == 0) {
 123             doubleBuffer = GL_TRUE;
 124         } else {
 125             fprintf(stderr, "%s (Bad option).\n", argv[i]);
 126             return GL_FALSE;
 127         }
 128     }
 129     return GL_TRUE;
 130 }
 131
 132 int main(int argc, char **argv)
 133 {
 134     GLenum type;
 135
 136     glutInit(&argc, argv);
 137
 138     if (Args(argc, argv) == GL_FALSE) {
 139         exit(1);
 140     }
 141
 142     glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
 143
 144     type = GLUT_RGB | GLUT_ALPHA;
 145     type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
 146     glutInitDisplayMode(type);
 147
 148     if (glutCreateWindow(*argv) == GL_FALSE) {
 149         exit(1);
 150     }
 151
 152     Init();
 153
 154     glutReshapeFunc(Reshape);
 155     glutKeyboardFunc(Key);
 156     glutDisplayFunc(Draw);
 157     glutMainLoop();
 158         return 0;
 159 }