1 files changed, 146 insertions, 0 deletions
diff --git a/progs/redbook/double.c b/progs/redbook/double.c
new file mode 100644
index 00000000000..3153c70cc1d
--- /dev/null
+++ b/progs/redbook/double.c
@@ -0,0 +1,146 @@
+/*
+ * 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+ * Unpublished-- rights reserved under the copyright laws of the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.
+ */
+
+/*
+ *  double.c
+ *  This is a simple double buffered program.
+ *  Pressing the left mouse button rotates the rectangle.
+ *  Pressing the middle mouse button stops the rotation.
+ */
+#include <GL/glut.h>
+#include <stdlib.h>
+
+static GLfloat spin = 0.0;
+static GLdouble t0 = 0.;
+
+void display(void)
+{
+   glClear(GL_COLOR_BUFFER_BIT);
+   glPushMatrix();
+   glRotatef(spin, 0.0, 0.0, 1.0);
+   glColor3f(1.0, 1.0, 1.0);
+   glRectf(-25.0, -25.0, 25.0, 25.0);
+   glPopMatrix();
+
+   glutSwapBuffers();
+}
+
+GLdouble gettime(void)
+{
+    return (GLdouble)(glutGet(GLUT_ELAPSED_TIME)) / 1000.;
+}
+
+void spinDisplay(void)
+{
+   GLdouble t, dt;
+   t = gettime();
+   dt = t - t0;
+   t0 = t;
+   spin = spin + 120.0*dt;
+   if (spin > 360.0)
+      spin = spin - 360.0;
+   glutPostRedisplay();
+}
+
+void init(void)
+{
+   glClearColor (0.0, 0.0, 0.0, 0.0);
+   glShadeModel (GL_FLAT);
+}
+
+void reshape(int w, int h)
+{
+   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
+   glMatrixMode(GL_PROJECTION);
+   glLoadIdentity();
+   glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
+   glMatrixMode(GL_MODELVIEW);
+   glLoadIdentity();
+}
+
+/* ARGSUSED2 */
+void mouse(int button, int state, int x, int y)
+{
+   switch (button) {
+      case GLUT_LEFT_BUTTON:
+         if (state == GLUT_DOWN)
+         {
+            t0 = gettime();
+            glutIdleFunc(spinDisplay);
+         }
+         break;
+      case GLUT_MIDDLE_BUTTON:
+         if (state == GLUT_DOWN)
+            glutIdleFunc(NULL);
+         break;
+      default:
+         break;
+   }
+}
+
+static void
+key(unsigned char k, int x, int y)
+{
+  switch (k) {
+  case 27:  /* Escape */
+    exit(0);
+    break;
+  default:
+    return;
+  }
+  glutPostRedisplay();
+}
+
+/*
+ *  Request double buffer display mode.
+ *  Register mouse input callback functions
+ */
+int main(int argc, char** argv)
+{
+   glutInit(&argc, argv);
+   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
+   glutInitWindowSize (250, 250);
+   glutInitWindowPosition (100, 100);
+   glutCreateWindow (argv[0]);
+   init ();
+   glutDisplayFunc(display);
+   glutReshapeFunc(reshape);
+   glutMouseFunc(mouse);
+   glutKeyboardFunc(key);
+   glutMainLoop();
+   return 0;   /* ANSI C requires main to return int. */
+}