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- /*
- * (c) Copyright 1993, 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- * Unpublished-- rights reserved under the copyright laws of the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(TM) is a trademark of Silicon Graphics, Inc.
- */
- /*
- * double.c
- * This program demonstrates double buffering for
- * flicker-free animation. The left and middle mouse
- * buttons start and stop the spinning motion of the square.
- */
- #include <GL/gl.h>
- #include <GL/glu.h>
- /*#include <GL/glx.h>*/
- #include <stdlib.h>
- #include "glaux.h"
-
- static GLfloat spin = 0.0;
-
- void display(void)
- {
- glClear (GL_COLOR_BUFFER_BIT);
-
- glPushMatrix ();
- glRotatef (spin, 0.0, 0.0, 1.0);
- glRectf (-25.0, -25.0, 25.0, 25.0);
- glPopMatrix ();
-
- glFlush();
- /* glXSwapBuffers (auxXDisplay(), auxXWindow());*/
- auxSwapBuffers();
- }
-
- void spinDisplay (void)
- {
- spin = spin + 2.0;
- if (spin > 360.0)
- spin = spin - 360.0;
- display();
- }
-
- void startIdleFunc (AUX_EVENTREC *event)
- {
- auxIdleFunc(spinDisplay);
- }
-
- void stopIdleFunc (AUX_EVENTREC *event)
- {
- auxIdleFunc(0);
- }
-
- void myinit (void)
- {
- glClearColor (0.0, 0.0, 0.0, 1.0);
- glColor3f (1.0, 1.0, 1.0);
- glShadeModel (GL_FLAT);
- }
-
- void myReshape(int w, int h)
- {
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w <= h)
- glOrtho (-50.0, 50.0, -50.0*(GLfloat)h/(GLfloat)w,
- 50.0*(GLfloat)h/(GLfloat)w, -1.0, 1.0);
- else
- glOrtho (-50.0*(GLfloat)w/(GLfloat)h,
- 50.0*(GLfloat)w/(GLfloat)h, -50.0, 50.0, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity ();
- }
-
- /* Main Loop
- * Open window with initial window size, title bar,
- * RGBA display mode, and handle input events.
- */
- int main(int argc, char** argv)
- {
- auxInitDisplayMode (AUX_DOUBLE | AUX_RGB);
- auxInitPosition (0, 0, 500, 500);
- if (!auxInitWindow (argv[0]))
- auxQuit();
- myinit ();
- myReshape( 500, 500 ); /* Added by Brian */
- auxReshapeFunc (myReshape);
- auxIdleFunc (spinDisplay);
- auxMouseFunc (AUX_LEFTBUTTON, AUX_MOUSEDOWN, startIdleFunc);
- auxMouseFunc (AUX_MIDDLEBUTTON, AUX_MOUSEDOWN, stopIdleFunc);
- auxMainLoop(display);
- return 0;
- }
-