97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*
|
|
* (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* Unpublished-- rights reserved under the copyright laws of the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.
|
|
*/
|
|
/*
|
|
* clip.c
|
|
* This program demonstrates arbitrary clipping planes.
|
|
*/
|
|
#include <windows.h>
|
|
#include <GL/gl.h>
|
|
#include <GL/glu.h>
|
|
#include "glaux.h"
|
|
|
|
void display(void)
|
|
{
|
|
GLdouble eqn[4] = {0.0, 1.0, 0.0, 0.0};
|
|
GLdouble eqn2[4] = {1.0, 0.0, 0.0, 0.0};
|
|
|
|
glClear(GL_COLOR_BUFFER_BIT);
|
|
|
|
glColor3f (1.0, 1.0, 1.0);
|
|
glPushMatrix();
|
|
glTranslatef (0.0, 0.0, -5.0);
|
|
|
|
/* clip lower half -- y < 0 */
|
|
glClipPlane (GL_CLIP_PLANE0, eqn);
|
|
glEnable (GL_CLIP_PLANE0);
|
|
/* clip left half -- x < 0 */
|
|
glClipPlane (GL_CLIP_PLANE1, eqn2);
|
|
glEnable (GL_CLIP_PLANE1);
|
|
|
|
glRotatef (90.0, 1.0, 0.0, 0.0);
|
|
auxWireSphere(1.0);
|
|
glPopMatrix();
|
|
glFlush();
|
|
}
|
|
|
|
void myinit (void) {
|
|
glShadeModel (GL_FLAT);
|
|
}
|
|
|
|
void myReshape(GLsizei w, GLsizei h)
|
|
{
|
|
glViewport(0, 0, w, h);
|
|
glMatrixMode(GL_PROJECTION);
|
|
glLoadIdentity();
|
|
gluPerspective(60.0, (GLfloat) w/(GLfloat) h, 1.0, 20.0);
|
|
glMatrixMode(GL_MODELVIEW);
|
|
}
|
|
|
|
/* 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_SINGLE | AUX_RGB);
|
|
auxInitPosition (0, 0, 500, 500);
|
|
auxInitWindow (argv[0]);
|
|
myinit ();
|
|
auxReshapeFunc (myReshape);
|
|
auxMainLoop(display);
|
|
}
|
|
|