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* Copyright (c) 1993-1997, Silicon Graphics, Inc.
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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* OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
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* This program demonstrates vertex arrays.
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#define ARRAYELEMENT 2
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#define DRAWELEMENTS 3
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int setupMethod = POINTER;
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int derefMethod = DRAWARRAY;
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static void setupPointers(void)
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static GLint vertices[] = {25, 25,
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static GLfloat colors[] = {1.0, 0.2, 0.2,
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glEnableClientState (GL_VERTEX_ARRAY);
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glEnableClientState (GL_COLOR_ARRAY);
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glVertexPointer (2, GL_INT, 0, vertices);
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glColorPointer (3, GL_FLOAT, 0, colors);
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static void setupInterleave(void)
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static GLfloat intertwined[] =
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{1.0, 0.2, 1.0, 100.0, 100.0, 0.0,
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1.0, 0.2, 0.2, 0.0, 200.0, 0.0,
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1.0, 1.0, 0.2, 100.0, 300.0, 0.0,
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0.2, 1.0, 0.2, 200.0, 300.0, 0.0,
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0.2, 1.0, 1.0, 300.0, 200.0, 0.0,
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0.2, 0.2, 1.0, 200.0, 100.0, 0.0};
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glInterleavedArrays (GL_C3F_V3F, 0, intertwined);
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static void init(void)
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glClearColor (0.0, 0.0, 0.0, 0.0);
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glShadeModel (GL_SMOOTH);
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static void display(void)
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glClear (GL_COLOR_BUFFER_BIT);
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if (derefMethod == DRAWARRAY)
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glDrawArrays (GL_TRIANGLES, 0, 6);
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else if (derefMethod == ARRAYELEMENT) {
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glBegin (GL_TRIANGLES);
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else if (derefMethod == DRAWELEMENTS) {
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GLuint indices[4] = {0, 1, 3, 4};
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glDrawElements (GL_POLYGON, 4, GL_UNSIGNED_INT, indices);
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static void reshape (int w, int h)
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glViewport (0, 0, (GLsizei) w, (GLsizei) h);
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glMatrixMode (GL_PROJECTION);
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gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
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static void mouse (int button, int state, int x, int y)
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case GLUT_LEFT_BUTTON:
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if (state == GLUT_DOWN) {
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if (setupMethod == POINTER) {
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setupMethod = INTERLEAVED;
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else if (setupMethod == INTERLEAVED) {
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setupMethod = POINTER;
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case GLUT_MIDDLE_BUTTON:
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case GLUT_RIGHT_BUTTON:
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if (state == GLUT_DOWN) {
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if (derefMethod == DRAWARRAY)
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derefMethod = ARRAYELEMENT;
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else if (derefMethod == ARRAYELEMENT)
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derefMethod = DRAWELEMENTS;
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else if (derefMethod == DRAWELEMENTS)
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derefMethod = DRAWARRAY;
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static void keyboard(unsigned char key, int x, int y)
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int main(int argc, char** argv)
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glutInit(&argc, argv);
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glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
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glutInitWindowSize (350, 350);
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glutInitWindowPosition (100, 100);
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glutCreateWindow (argv[0]);
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glutDisplayFunc(display);
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glutReshapeFunc(reshape);
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glutMouseFunc(mouse);
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glutKeyboardFunc (keyboard);
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int main(int argc, char** argv)
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fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
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fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
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fprintf (stderr, "you may be able to modify this program to make it run.\n");