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diff --git a/progs/redbook/pointp.c b/progs/redbook/pointp.c
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-/*
- * Copyright (c) 1993-2003, 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 Unpublished - rights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.
- * 1500 Crittenden Lane
- * Mountain View, CA 94043
- * United State of America
- *
- * OpenGL(R) is a registered trademark of Silicon Graphics, Inc.
- */
-
-/*
- * pointp.c
- * This program demonstrates point parameters and their effect
- * on point primitives.
- * 250 points are randomly generated within a 10 by 10 by 40
- * region, centered at the origin. In some modes (including the
- * default), points that are closer to the viewer will appear larger.
- *
- * Pressing the 'l', 'q', and 'c' keys switch the point
- * parameters attenuation mode to linear, quadratic, or constant,
- * respectively.
- * Pressing the 'f' and 'b' keys move the viewer forward
- * and backwards. In either linear or quadratic attenuation
- * mode, the distance from the viewer to the point will change
- * the size of the point primitive.
- * Pressing the '+' and '-' keys will change the current point
- * size. In this program, the point size is bounded, so it
- * will not get less than 2.0, nor greater than GL_POINT_SIZE_MAX.
- */
-
-#include <GL/glew.h>
-#include <GL/glut.h>
-#include <stdlib.h>
-#include <stdio.h>
-
-static GLfloat psize = 7.0;
-static GLfloat pmax[1];
-static GLfloat constant[3] = {1.0, 0.0, 0.0};
-static GLfloat linear[3] = {0.0, 0.12, 0.0};
-static GLfloat quadratic[3] = {0.0, 0.0, 0.01};
-
-static void init(void)
-{
- int i;
-
- srand (12345);
-
- glNewList(1, GL_COMPILE);
- glBegin (GL_POINTS);
- for (i = 0; i < 250; i++) {
- glColor3f (1.0, ((rand()/(float) RAND_MAX) * 0.5) + 0.5,
- rand()/(float) RAND_MAX);
-/* randomly generated vertices:
- -5 < x < 5; -5 < y < 5; -5 < z < -45 */
- glVertex3f ( ((rand()/(float)RAND_MAX) * 10.0) - 5.0,
- ((rand()/(float)RAND_MAX) * 10.0) - 5.0,
- ((rand()/(float)RAND_MAX) * 40.0) - 45.0);
- }
- glEnd();
- glEndList();
-
- glEnable(GL_DEPTH_TEST);
- glEnable(GL_POINT_SMOOTH);
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
- glPointSize(psize);
- glGetFloatv(GL_POINT_SIZE_MAX_EXT, pmax);
-
- glPointParameterfvEXT (GL_DISTANCE_ATTENUATION_EXT, linear);
- glPointParameterfEXT (GL_POINT_FADE_THRESHOLD_SIZE_EXT, 2.0);
-}
-
-static void display(void)
-{
- glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glCallList (1);
- glutSwapBuffers ();
-}
-
-static void reshape (int w, int h)
-{
- glViewport (0, 0, (GLsizei) w, (GLsizei) h);
- glMatrixMode (GL_PROJECTION);
- glLoadIdentity ();
- gluPerspective (35.0, 1.0, 0.25, 200.0);
- glMatrixMode (GL_MODELVIEW);
- glTranslatef (0.0, 0.0, -10.0);
-}
-
-static void keyboard(unsigned char key, int x, int y)
-{
- switch (key) {
- case 'b':
- glMatrixMode (GL_MODELVIEW);
- glTranslatef (0.0, 0.0, -0.5);
- glutPostRedisplay();
- break;
- case 'c':
- glPointParameterfvEXT (GL_DISTANCE_ATTENUATION_EXT, constant);
- glutPostRedisplay();
- break;
- case 'f':
- glMatrixMode (GL_MODELVIEW);
- glTranslatef (0.0, 0.0, 0.5);
- glutPostRedisplay();
- break;
- case 'l':
- glPointParameterfvEXT (GL_DISTANCE_ATTENUATION_EXT, linear);
- glutPostRedisplay();
- break;
- case 'q':
- glPointParameterfvEXT (GL_DISTANCE_ATTENUATION_EXT, quadratic);
- glutPostRedisplay();
- break;
- case '+':
- if (psize < (pmax[0] + 1.0))
- psize = psize + 1.0;
- glPointSize (psize);
- glutPostRedisplay();
- break;
- case '-':
- if (psize >= 2.0)
- psize = psize - 1.0;
- glPointSize (psize);
- glutPostRedisplay();
- break;
- case 27:
- exit(0);
- break;
- }
-}
-
-int main(int argc, char** argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH | GLUT_MULTISAMPLE);
- glutInitWindowSize (500, 500);
- glutInitWindowPosition (100, 100);
- glutCreateWindow (argv[0]);
- glewInit();
- init ();
- glutDisplayFunc (display);
- glutReshapeFunc (reshape);
- glutKeyboardFunc (keyboard);
- glutMainLoop();
- return 0;
-}
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