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