tri-edgeflag-array.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
30static GLenum frontface = GL_CCW;
31
32
33static void
34Init(void)
35{
36   fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
37   fprintf(stderr, "GL_VERSION  = %s\n", (char *) glGetString(GL_VERSION));
38   fprintf(stderr, "GL_VENDOR   = %s\n", (char *) glGetString(GL_VENDOR));
39   fflush(stderr);
40}
41
42
43static void
44Reshape(int width, int height)
45{
46   glViewport(0, 0, (GLint)width, (GLint)height);
47   glMatrixMode(GL_PROJECTION);
48   glLoadIdentity();
49   glMatrixMode(GL_MODELVIEW);
50}
51
52
53static void
54Key(unsigned char key, int x, int y)
55{
56   switch (key) {
57   case 'f':
58      frontface = (frontface == GL_CCW) ? GL_CW : GL_CCW;
59      glFrontFace(frontface);
60      break;
61   case 27:
62      exit(1);
63   default:
64      return;
65   }
66   glutPostRedisplay();
67}
68
69
70static void
71Draw(void)
72{
73   static GLboolean flags[3] = { 1, 0, 1};
74   static GLfloat color[3][3] = {
75      { 0.3, 0.3, 0.9 },
76      { 0.8, 0.0, 0.0 },
77      { 0.0, 0.9, 0.0 }
78   };
79   static GLfloat vert[3][3] = {
80      { 0.9, -0.9, 0.0 },
81      { 0.9, 0.9, 0.0 },
82      { -0.9, 0.0, 0.0 }
83   };
84
85   glClear(GL_COLOR_BUFFER_BIT);
86   glPolygonMode(GL_FRONT, GL_LINE);
87   glPolygonMode(GL_BACK, GL_POINT);
88
89   glVertexPointer(3, GL_FLOAT, 0, vert);
90   glColorPointer(3, GL_FLOAT, 0, color);
91   glEdgeFlagPointer(0, flags);
92   glEnableClientState(GL_VERTEX_ARRAY);
93   glEnableClientState(GL_COLOR_ARRAY);
94   glEnableClientState(GL_EDGE_FLAG_ARRAY);
95
96   glDrawArrays(GL_TRIANGLES, 0, 3);
97
98   glutSwapBuffers();
99}
100
101
102int
103main(int argc, char **argv)
104{
105   glutInit(&argc, argv);
106
107   glutInitWindowPosition(0, 0);
108   glutInitWindowSize( 250, 250);
109   glutInitDisplayMode(GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE);
110   if (!glutCreateWindow(*argv)) {
111      exit(1);
112   }
113   glutReshapeFunc(Reshape);
114   glutKeyboardFunc(Key);
115   glutDisplayFunc(Draw);
116   Init();
117   glutMainLoop();
118   return 0;
119}
120