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diff --git a/progs/redbook/varray.c b/progs/redbook/varray.c
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+/*
+ * Copyright (c) 1993-1997, Silicon Graphics, Inc.
+ * ALL RIGHTS RESERVED 
+ * Permission to use, copy, modify, and distribute this software for 
+ * any purpose and without fee is hereby granted, provided that the above
+ * copyright notice appear in all copies and that both the copyright notice
+ * and this permission notice appear in supporting documentation, and that 
+ * the name of Silicon Graphics, Inc. not be used in advertising
+ * or publicity pertaining to distribution of the software without specific,
+ * written prior permission. 
+ *
+ * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
+ * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
+ * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
+ * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
+ * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
+ * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
+ * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
+ * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
+ * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
+ * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
+ * 
+ * US Government Users Restricted Rights 
+ * Use, duplication, or disclosure by the Government is subject to
+ * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
+ * (c)(1)(ii) of the Rights in Technical Data and Computer Software
+ * clause at DFARS 252.227-7013 and/or in similar or successor
+ * clauses in the FAR or the DOD or NASA FAR Supplement.
+ * Unpublished-- rights reserved under the copyright laws of the
+ * United States.  Contractor/manufacturer is Silicon Graphics,
+ * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
+ *
+ * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
+ */
+
+/*
+ *  varray.c
+ *  This program demonstrates vertex arrays.
+ */
+#include <GL/glut.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#ifdef GL_VERSION_1_1
+#define POINTER 1
+#define INTERLEAVED 2
+
+#define DRAWARRAY 1
+#define ARRAYELEMENT  2
+#define DRAWELEMENTS 3
+
+int setupMethod = POINTER;
+int derefMethod = DRAWARRAY;
+
+void setupPointers(void)
+{
+   static GLint vertices[] = {25, 25,
+                       100, 325,
+                       175, 25,
+                       175, 325,
+                       250, 25,
+                       325, 325};
+   static GLfloat colors[] = {1.0, 0.2, 0.2,
+                       0.2, 0.2, 1.0,
+                       0.8, 1.0, 0.2,
+                       0.75, 0.75, 0.75,
+                       0.35, 0.35, 0.35,
+                       0.5, 0.5, 0.5};
+
+   glEnableClientState (GL_VERTEX_ARRAY);
+   glEnableClientState (GL_COLOR_ARRAY);
+
+   glVertexPointer (2, GL_INT, 0, vertices);
+   glColorPointer (3, GL_FLOAT, 0, colors);
+}
+
+void setupInterleave(void)
+{
+   static GLfloat intertwined[] =
+      {1.0, 0.2, 1.0, 100.0, 100.0, 0.0,
+       1.0, 0.2, 0.2, 0.0, 200.0, 0.0,
+       1.0, 1.0, 0.2, 100.0, 300.0, 0.0,
+       0.2, 1.0, 0.2, 200.0, 300.0, 0.0,
+       0.2, 1.0, 1.0, 300.0, 200.0, 0.0,
+       0.2, 0.2, 1.0, 200.0, 100.0, 0.0};
+   
+   glInterleavedArrays (GL_C3F_V3F, 0, intertwined);
+}
+
+void init(void) 
+{
+   glClearColor (0.0, 0.0, 0.0, 0.0);
+   glShadeModel (GL_SMOOTH);
+   setupPointers ();
+}
+
+void display(void)
+{
+   glClear (GL_COLOR_BUFFER_BIT);
+
+   if (derefMethod == DRAWARRAY) 
+      glDrawArrays (GL_TRIANGLES, 0, 6);
+   else if (derefMethod == ARRAYELEMENT) {
+      glBegin (GL_TRIANGLES);
+      glArrayElement (2);
+      glArrayElement (3);
+      glArrayElement (5);
+      glEnd ();
+   }
+   else if (derefMethod == DRAWELEMENTS) {
+      GLuint indices[4] = {0, 1, 3, 4};
+
+      glDrawElements (GL_POLYGON, 4, GL_UNSIGNED_INT, indices);
+   }
+   glFlush ();
+}
+
+void reshape (int w, int h)
+{
+   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
+   glMatrixMode (GL_PROJECTION);
+   glLoadIdentity ();
+   gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
+}
+
+/* ARGSUSED2 */
+void mouse (int button, int state, int x, int y)
+{
+   switch (button) {
+      case GLUT_LEFT_BUTTON:
+         if (state == GLUT_DOWN) {
+            if (setupMethod == POINTER) {
+               setupMethod = INTERLEAVED;
+               setupInterleave();
+            }
+            else if (setupMethod == INTERLEAVED) {
+               setupMethod = POINTER;
+               setupPointers();
+            }
+            glutPostRedisplay();
+         }
+         break;
+      case GLUT_MIDDLE_BUTTON:
+      case GLUT_RIGHT_BUTTON:
+         if (state == GLUT_DOWN) {
+            if (derefMethod == DRAWARRAY) 
+               derefMethod = ARRAYELEMENT;
+            else if (derefMethod == ARRAYELEMENT) 
+               derefMethod = DRAWELEMENTS;
+            else if (derefMethod == DRAWELEMENTS) 
+               derefMethod = DRAWARRAY;
+            glutPostRedisplay();
+         }
+         break;
+      default:
+         break;
+   }
+}
+
+/* ARGSUSED1 */
+void keyboard(unsigned char key, int x, int y)
+{
+   switch (key) {
+      case 27:
+         exit(0);
+         break;
+   }
+}
+
+int main(int argc, char** argv)
+{
+   glutInit(&argc, argv);
+   glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB);
+   glutInitWindowSize (350, 350); 
+   glutInitWindowPosition (100, 100);
+   glutCreateWindow (argv[0]);
+   init ();
+   glutDisplayFunc(display); 
+   glutReshapeFunc(reshape);
+   glutMouseFunc(mouse);
+   glutKeyboardFunc (keyboard);
+   glutMainLoop();
+   return 0;
+}
+#else
+int main(int argc, char** argv)
+{
+    fprintf (stderr, "This program demonstrates a feature which is not in OpenGL Version 1.0.\n");
+    fprintf (stderr, "If your implementation of OpenGL Version 1.0 has the right extensions,\n");
+    fprintf (stderr, "you may be able to modify this program to make it run.\n");
+    return 0;
+}
+#endif