progs/redbook/mvarray.c

   1 /*
   2  * Copyright (c) 1993-2003, Silicon Graphics, Inc.
   3  * All Rights Reserved
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose and without fee is hereby granted, provided that the above
   7  * copyright notice appear in all copies and that both the copyright
   8  * notice and this permission notice appear in supporting documentation,
   9  * and that the name of Silicon Graphics, Inc. not be used in
  10  * advertising or publicity pertaining to distribution of the software
  11  * without specific, written prior permission.
  12  *
  13  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND
  14  * WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  16  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  17  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  18  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  19  * OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION, LOSS OF
  20  * PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD
  21  * PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN ADVISED OF
  22  * THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF
  23  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE
  24  * OR PERFORMANCE OF THIS SOFTWARE.
  25  *
  26  * US Government Users Restricted Rights
  27  * Use, duplication, or disclosure by the Government is subject to
  28  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  29  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  30  * clause at DFARS 252.227-7013 and/or in similar or successor clauses
  31  * in the FAR or the DOD or NASA FAR Supplement.  Unpublished - rights
  32  * reserved under the copyright laws of the United States.
  33  *
  34  * Contractor/manufacturer is:
  35  *      Silicon Graphics, Inc.
  36  *      1500 Crittenden Lane
  37  *      Mountain View, CA  94043
  38  *      United State of America
  39  *
  40  * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
  41  */
  42
  43 /*
  44  *  mvarray.c
  45  *  This program demonstrates multiple vertex arrays,
  46  *  specifically the OpenGL routine glMultiDrawElements().
  47  */
  48
  49 #define GL_GLEXT_PROTOTYPES
  50
  51 #include <GL/glut.h>
  52 #include <stdlib.h>
  53 #include <stdio.h>
  54
  55 #ifdef GL_VERSION_1_3
  56
  57 static void setupPointer(void)
  58 {
  59    static GLint vertices[] = {25, 25,
  60                        75, 75,
  61                        100, 125,
  62                        150, 75,
  63                        200, 175,
  64                        250, 150,
  65                        300, 125,
  66                        100, 200,
  67                        150, 250,
  68                        200, 225,
  69                        250, 300,
  70                        300, 250};
  71
  72    glEnableClientState (GL_VERTEX_ARRAY);
  73    glVertexPointer (2, GL_INT, 0, vertices);
  74 }
  75
  76 static void init(void)
  77 {
  78    glClearColor (0.0, 0.0, 0.0, 0.0);
  79    glShadeModel (GL_SMOOTH);
  80    setupPointer ();
  81 }
  82
  83 static void display(void)
  84 {
  85    static GLubyte oneIndices[] = {0, 1, 2, 3, 4, 5, 6};
  86    static GLubyte twoIndices[] = {1, 7, 8, 9, 10, 11};
  87    static GLsizei count[] = {7, 6};
  88    static GLvoid * indices[2] = {oneIndices, twoIndices};
  89
  90    glClear (GL_COLOR_BUFFER_BIT);
  91    glColor3f (1.0, 1.0, 1.0);
  92    glMultiDrawElementsEXT (GL_LINE_STRIP, count, GL_UNSIGNED_BYTE,
  93                            (const GLvoid **) indices, 2);
  94    glFlush ();
  95 }
  96
  97 static void reshape (int w, int h)
  98 {
  99    glViewport (0, 0, (GLsizei) w, (GLsizei) h);
 100    glMatrixMode (GL_PROJECTION);
 101    glLoadIdentity ();
 102    gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
 103 }
 104
 105 static void keyboard(unsigned char key, int x, int y)
 106 {
 107    switch (key) {
 108       case 27:
 109          exit(0);
 110          break;
 111    }
 112 }
 113
 114 int main(int argc, char** argv)
 115 {
 116    glutInit(&argc, argv);
 117    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
 118    glutInitWindowSize (350, 350);
 119    glutInitWindowPosition (100, 100);
 120    glutCreateWindow (argv[0]);
 121    init ();
 122    glutDisplayFunc(display);
 123    glutReshapeFunc(reshape);
 124    glutKeyboardFunc (keyboard);
 125    glutMainLoop();
 126    return 0;
 127 }
 128 #else
 129 int main(int argc, char** argv)
 130 {
 131     fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
 132     fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
 133     fprintf (stderr, "you may be able to modify this program to make it run.\n");
 134     return 0;
 135 }
 136 #endif