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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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
- /*
- * antipindex.c
- * The program draws antialiased points,
- * in color index mode.
- */
- #include <GL/gl.h>
- #include <GL/glu.h>
- #include <stdlib.h>
- #include "glaux.h"
-
- #define RAMPSIZE 16
- #define RAMPSTART 32
-
- /* Initialize point antialiasing for color index mode,
- * including loading a grey color ramp starting at
- * RAMPSTART, which must be a multiple of 16.
- */
- void myinit(void)
- {
- int i;
-
- for (i = 0; i < RAMPSIZE; i++) {
- GLfloat shade;
- shade = (GLfloat) i/(GLfloat) RAMPSIZE;
- auxSetOneColor (RAMPSTART+(GLint)i, shade, shade, shade);
- }
- glEnable (GL_POINT_SMOOTH);
- glHint (GL_POINT_SMOOTH_HINT, GL_FASTEST);
- glPointSize (3.0);
- glClearIndex ((GLfloat) RAMPSTART);
- }
-
- /* display() draws several points. */
-
- void display(void)
- {
- int i;
-
- glClear(GL_COLOR_BUFFER_BIT);
- glIndexi (RAMPSTART);
- glBegin (GL_POINTS);
- for (i = 1; i < 10; i++) {
- glVertex2f ((GLfloat) i * 10.0, (GLfloat) i * 10.0);
- }
- glEnd ();
- glFlush();
- }
-
- void myReshape(int w, int h)
- {
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w < h)
- glOrtho (0.0, 100.0, 0.0,
- 100.0*(GLfloat) h/(GLfloat) w, -1.0, 1.0);
- else
- glOrtho (0.0, 100.0*(GLfloat) w/(GLfloat) h,
- 0.0, 100.0, -1.0, 1.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity ();
- }
-
- /* Main Loop
- * Open window with initial window size, title bar,
- * color index display mode, and handle input events.
- */
- int main(int argc, char** argv)
- {
- auxInitDisplayMode (AUX_SINGLE | AUX_INDEX);
- auxInitPosition (0, 0, 100, 100);
- if (!auxInitWindow (argv[0]))
- auxQuit();
- myinit();
- auxReshapeFunc (myReshape);
- auxMainLoop(display);
- return 0;
- }
-
-