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Diffstat (limited to 'progs/redbook/fog.c')
| -rw-r--r-- | progs/redbook/fog.c | 200 |
1 files changed, 0 insertions, 200 deletions
diff --git a/progs/redbook/fog.c b/progs/redbook/fog.c deleted file mode 100644 index 4f4b8e3cc0..0000000000 --- a/progs/redbook/fog.c +++ /dev/null @@ -1,200 +0,0 @@ - -/* 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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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. - */ -/* - * fog.c - * This program draws 5 red teapots, each at a different - * z distance from the eye, in different types of fog. - * Pressing the left mouse button chooses between 3 types of - * fog: exponential, exponential squared, and linear. - * In this program, there is a fixed density value, as well - * as fixed start and end values for the linear fog. - */ -#include <stdlib.h> -#include <math.h> -#include <GL/glut.h> - -GLint fogMode; - -static void -selectFog(int mode) -{ - switch(mode) { - case GL_LINEAR: - glFogf(GL_FOG_START, 1.0); - glFogf(GL_FOG_END, 5.0); - /* falls through */ - case GL_EXP2: - case GL_EXP: - glFogi(GL_FOG_MODE, mode); - glutPostRedisplay(); - break; - case 0: - exit(0); - } -} - -/* Initialize z-buffer, projection matrix, light source, - * and lighting model. Do not specify a material property here. - */ -static void -myinit(void) -{ - GLfloat position[] = - {0.0, 3.0, 3.0, 0.0}; - GLfloat local_view[] = - {0.0}; - - glEnable(GL_DEPTH_TEST); - glDepthFunc(GL_LESS); - - glLightfv(GL_LIGHT0, GL_POSITION, position); - glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view); - - glFrontFace(GL_CW); - glEnable(GL_LIGHTING); - glEnable(GL_LIGHT0); - glEnable(GL_AUTO_NORMAL); - glEnable(GL_NORMALIZE); - glEnable(GL_FOG); - { - GLfloat fogColor[4] = - {0.5, 0.5, 0.5, 1.0}; - - fogMode = GL_EXP; - glFogi(GL_FOG_MODE, fogMode); - glFogfv(GL_FOG_COLOR, fogColor); - glFogf(GL_FOG_DENSITY, 0.35); - glHint(GL_FOG_HINT, GL_DONT_CARE); - glClearColor(0.5, 0.5, 0.5, 1.0); - } -} - -static void -renderRedTeapot(GLfloat x, GLfloat y, GLfloat z) -{ - float mat[4]; - - glPushMatrix(); - glTranslatef(x, y, z); - mat[0] = 0.1745; - mat[1] = 0.01175; - mat[2] = 0.01175; - mat[3] = 1.0; - glMaterialfv(GL_FRONT, GL_AMBIENT, mat); - mat[0] = 0.61424; - mat[1] = 0.04136; - mat[2] = 0.04136; - glMaterialfv(GL_FRONT, GL_DIFFUSE, mat); - mat[0] = 0.727811; - mat[1] = 0.626959; - mat[2] = 0.626959; - glMaterialfv(GL_FRONT, GL_SPECULAR, mat); - glMaterialf(GL_FRONT, GL_SHININESS, 0.6 * 128.0); - glutSolidTeapot(1.0); - glPopMatrix(); -} - -/* display() draws 5 teapots at different z positions. - */ -static void -display(void) -{ - glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); - renderRedTeapot(-4.0, -0.5, -1.0); - renderRedTeapot(-2.0, -0.5, -2.0); - renderRedTeapot(0.0, -0.5, -3.0); - renderRedTeapot(2.0, -0.5, -4.0); - renderRedTeapot(4.0, -0.5, -5.0); - glFlush(); -} - -static void -myReshape(int w, int h) -{ - glViewport(0, 0, w, h); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - if (w <= (h * 3)) - glOrtho(-6.0, 6.0, -2.0 * ((GLfloat) h * 3) / (GLfloat) w, - 2.0 * ((GLfloat) h * 3) / (GLfloat) w, 0.0, 10.0); - else - glOrtho(-6.0 * (GLfloat) w / ((GLfloat) h * 3), - 6.0 * (GLfloat) w / ((GLfloat) h * 3), -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_RGB | GLUT_DEPTH); - glutInitWindowSize(450, 150); - glutCreateWindow(argv[0]); - myinit(); - glutReshapeFunc(myReshape); - glutDisplayFunc(display); - glutCreateMenu(selectFog); - glutAddMenuEntry("Fog EXP", GL_EXP); - glutAddMenuEntry("Fog EXP2", GL_EXP2); - glutAddMenuEntry("Fog LINEAR", GL_LINEAR); - glutAddMenuEntry("Quit", 0); - glutAttachMenu(GLUT_RIGHT_BUTTON); - glutKeyboardFunc(key); - glutMainLoop(); - return 0; /* ANSI C requires main to return int. */ -} |