+++ /dev/null
-
-/* Copyright (c) Mark J. Kilgard, 1994. */
-
-/*
- * (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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
-/*
- * fogindex.c
- * This program demonstrates fog in color index mode.
- * Three cones are drawn at different z values in a linear
- * fog. 32 contiguous colors (from 16 to 47) are loaded
- * with a color ramp.
- */
-#include <stdlib.h>
-#include <GL/glut.h>
-
-/* Initialize color map and fog. Set screen clear color
- * to end of color ramp.
- */
-#define NUM_COLORS 32
-#define RAMPSTART 16
-
-static void
-myinit(void)
-{
- int i;
-
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- for (i = 0; i < NUM_COLORS; i++) {
- GLfloat shade;
- shade = (GLfloat) (NUM_COLORS - i) / (GLfloat) NUM_COLORS;
- glutSetColor(16 + i, shade, shade, shade);
- }
- glEnable(GL_FOG);
-
- glFogi(GL_FOG_MODE, GL_LINEAR);
- glFogi(GL_FOG_INDEX, NUM_COLORS);
- glFogf(GL_FOG_START, 0.0);
- glFogf(GL_FOG_END, 4.0);
- glHint(GL_FOG_HINT, GL_NICEST);
- glClearIndex((GLfloat) (NUM_COLORS + RAMPSTART - 1));
-}
-
-/* display() renders 3 cones at different z positions.
- */
-static void
-display(void)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glPushMatrix();
- glTranslatef(-1.0, -1.0, -1.0);
- glRotatef(-90.0, 1.0, 0.0, 0.0);
- glIndexi(RAMPSTART);
- glutSolidCone(1.0, 2.0, 10, 10);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(0.0, -1.0, -2.25);
- glRotatef(-90.0, 1.0, 0.0, 0.0);
- glIndexi(RAMPSTART);
- glutSolidCone(1.0, 2.0, 10, 10);
- glPopMatrix();
-
- glPushMatrix();
- glTranslatef(1.0, -1.0, -3.5);
- glRotatef(-90.0, 1.0, 0.0, 0.0);
- glIndexi(RAMPSTART);
- glutSolidCone(1.0, 2.0, 10, 10);
- glPopMatrix();
- glFlush();
-}
-
-static void
-myReshape(int w, int h)
-{
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- if (w <= h)
- glOrtho(-2.0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w,
- 2.0 * (GLfloat) h / (GLfloat) w, 0.0, 10.0);
- else
- glOrtho(-2.0 * (GLfloat) w / (GLfloat) h,
- 2.0 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, 0.0, 10.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27: /* Escape */
- exit(0);
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-/* Main Loop
- * Open window with initial window size, title bar,
- * RGBA display mode, depth buffer, and handle input events.
- */
-int
-main(int argc, char **argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_SINGLE | GLUT_INDEX | GLUT_DEPTH);
- glutCreateWindow(argv[0]);
- myinit();
- glutReshapeFunc(myReshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
projects / mesa.git / blobdiff