progs/redbook/teapots.c

   1
   2 /* Copyright (c) Mark J. Kilgard, 1994. */
   3
   4 /**
   5  * (c) Copyright 1993, Silicon Graphics, Inc.
   6  * ALL RIGHTS RESERVED
   7  * Permission to use, copy, modify, and distribute this software for
   8  * any purpose and without fee is hereby granted, provided that the above
   9  * copyright notice appear in all copies and that both the copyright notice
  10  * and this permission notice appear in supporting documentation, and that
  11  * the name of Silicon Graphics, Inc. not be used in advertising
  12  * or publicity pertaining to distribution of the software without specific,
  13  * written prior permission.
  14  *
  15  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  16  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  17  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  18  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  19  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  20  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
  21  * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
  22  * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
  23  * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
  24  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  25  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  26  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
  27  *
  28  * US Government Users Restricted Rights
  29  * Use, duplication, or disclosure by the Government is subject to
  30  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  31  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  32  * clause at DFARS 252.227-7013 and/or in similar or successor
  33  * clauses in the FAR or the DOD or NASA FAR Supplement.
  34  * Unpublished-- rights reserved under the copyright laws of the
  35  * United States.  Contractor/manufacturer is Silicon Graphics,
  36  * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
  37  *
  38  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  39  */
  40 /**
  41  *  teapots.c
  42  *  This program demonstrates lots of material properties.
  43  *  A single light source illuminates the objects.
  44  */
  45 #include <stdlib.h>
  46 #include <GL/glut.h>
  47
  48 /*
  49  * Initialize depth buffer, projection matrix, light source, and lighting
  50  * model.  Do not specify a material property here.
  51  */
  52 void
  53 myinit(void)
  54 {
  55   GLfloat ambient[] =
  56   {0.0, 0.0, 0.0, 1.0};
  57   GLfloat diffuse[] =
  58   {1.0, 1.0, 1.0, 1.0};
  59   GLfloat position[] =
  60   {0.0, 3.0, 3.0, 0.0};
  61
  62   GLfloat lmodel_ambient[] =
  63   {0.2, 0.2, 0.2, 1.0};
  64   GLfloat local_view[] =
  65   {0.0};
  66
  67   glLightfv(GL_LIGHT0, GL_AMBIENT, ambient);
  68   glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuse);
  69   glLightfv(GL_LIGHT0, GL_POSITION, position);
  70   glLightModelfv(GL_LIGHT_MODEL_AMBIENT, lmodel_ambient);
  71   glLightModelfv(GL_LIGHT_MODEL_LOCAL_VIEWER, local_view);
  72
  73   glFrontFace(GL_CW);
  74   glEnable(GL_LIGHTING);
  75   glEnable(GL_LIGHT0);
  76   glEnable(GL_AUTO_NORMAL);
  77   glEnable(GL_NORMALIZE);
  78   glEnable(GL_DEPTH_TEST);
  79   glDepthFunc(GL_LESS);
  80 }
  81
  82 /*
  83  * Move object into position.  Use 3rd through 12th parameters to specify the
  84  * material property.  Draw a teapot.
  85  */
  86 void
  87 renderTeapot(GLfloat x, GLfloat y,
  88   GLfloat ambr, GLfloat ambg, GLfloat ambb,
  89   GLfloat difr, GLfloat difg, GLfloat difb,
  90   GLfloat specr, GLfloat specg, GLfloat specb, GLfloat shine)
  91 {
  92   float mat[4];
  93
  94   glPushMatrix();
  95   glTranslatef(x, y, 0.0);
  96   mat[0] = ambr;
  97   mat[1] = ambg;
  98   mat[2] = ambb;
  99   mat[3] = 1.0;
 100   glMaterialfv(GL_FRONT, GL_AMBIENT, mat);
 101   mat[0] = difr;
 102   mat[1] = difg;
 103   mat[2] = difb;
 104   glMaterialfv(GL_FRONT, GL_DIFFUSE, mat);
 105   mat[0] = specr;
 106   mat[1] = specg;
 107   mat[2] = specb;
 108   glMaterialfv(GL_FRONT, GL_SPECULAR, mat);
 109   glMaterialf(GL_FRONT, GL_SHININESS, shine * 128.0);
 110   glutSolidTeapot(1.0);
 111   glPopMatrix();
 112 }
 113
 114 /**
 115  *  First column:  emerald, jade, obsidian, pearl, ruby, turquoise
 116  *  2nd column:  brass, bronze, chrome, copper, gold, silver
 117  *  3rd column:  black, cyan, green, red, white, yellow plastic
 118  *  4th column:  black, cyan, green, red, white, yellow rubber
 119  */
 120 void
 121 display(void)
 122 {
 123   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 124   renderTeapot(2.0, 17.0, 0.0215, 0.1745, 0.0215,
 125     0.07568, 0.61424, 0.07568, 0.633, 0.727811, 0.633, 0.6);
 126   renderTeapot(2.0, 14.0, 0.135, 0.2225, 0.1575,
 127     0.54, 0.89, 0.63, 0.316228, 0.316228, 0.316228, 0.1);
 128   renderTeapot(2.0, 11.0, 0.05375, 0.05, 0.06625,
 129     0.18275, 0.17, 0.22525, 0.332741, 0.328634, 0.346435, 0.3);
 130   renderTeapot(2.0, 8.0, 0.25, 0.20725, 0.20725,
 131     1, 0.829, 0.829, 0.296648, 0.296648, 0.296648, 0.088);
 132   renderTeapot(2.0, 5.0, 0.1745, 0.01175, 0.01175,
 133     0.61424, 0.04136, 0.04136, 0.727811, 0.626959, 0.626959, 0.6);
 134   renderTeapot(2.0, 2.0, 0.1, 0.18725, 0.1745,
 135     0.396, 0.74151, 0.69102, 0.297254, 0.30829, 0.306678, 0.1);
 136   renderTeapot(6.0, 17.0, 0.329412, 0.223529, 0.027451,
 137     0.780392, 0.568627, 0.113725, 0.992157, 0.941176, 0.807843,
 138     0.21794872);
 139   renderTeapot(6.0, 14.0, 0.2125, 0.1275, 0.054,
 140     0.714, 0.4284, 0.18144, 0.393548, 0.271906, 0.166721, 0.2);
 141   renderTeapot(6.0, 11.0, 0.25, 0.25, 0.25,
 142     0.4, 0.4, 0.4, 0.774597, 0.774597, 0.774597, 0.6);
 143   renderTeapot(6.0, 8.0, 0.19125, 0.0735, 0.0225,
 144     0.7038, 0.27048, 0.0828, 0.256777, 0.137622, 0.086014, 0.1);
 145   renderTeapot(6.0, 5.0, 0.24725, 0.1995, 0.0745,
 146     0.75164, 0.60648, 0.22648, 0.628281, 0.555802, 0.366065, 0.4);
 147   renderTeapot(6.0, 2.0, 0.19225, 0.19225, 0.19225,
 148     0.50754, 0.50754, 0.50754, 0.508273, 0.508273, 0.508273, 0.4);
 149   renderTeapot(10.0, 17.0, 0.0, 0.0, 0.0, 0.01, 0.01, 0.01,
 150     0.50, 0.50, 0.50, .25);
 151   renderTeapot(10.0, 14.0, 0.0, 0.1, 0.06, 0.0, 0.50980392, 0.50980392,
 152     0.50196078, 0.50196078, 0.50196078, .25);
 153   renderTeapot(10.0, 11.0, 0.0, 0.0, 0.0,
 154     0.1, 0.35, 0.1, 0.45, 0.55, 0.45, .25);
 155   renderTeapot(10.0, 8.0, 0.0, 0.0, 0.0, 0.5, 0.0, 0.0,
 156     0.7, 0.6, 0.6, .25);
 157   renderTeapot(10.0, 5.0, 0.0, 0.0, 0.0, 0.55, 0.55, 0.55,
 158     0.70, 0.70, 0.70, .25);
 159   renderTeapot(10.0, 2.0, 0.0, 0.0, 0.0, 0.5, 0.5, 0.0,
 160     0.60, 0.60, 0.50, .25);
 161   renderTeapot(14.0, 17.0, 0.02, 0.02, 0.02, 0.01, 0.01, 0.01,
 162     0.4, 0.4, 0.4, .078125);
 163   renderTeapot(14.0, 14.0, 0.0, 0.05, 0.05, 0.4, 0.5, 0.5,
 164     0.04, 0.7, 0.7, .078125);
 165   renderTeapot(14.0, 11.0, 0.0, 0.05, 0.0, 0.4, 0.5, 0.4,
 166     0.04, 0.7, 0.04, .078125);
 167   renderTeapot(14.0, 8.0, 0.05, 0.0, 0.0, 0.5, 0.4, 0.4,
 168     0.7, 0.04, 0.04, .078125);
 169   renderTeapot(14.0, 5.0, 0.05, 0.05, 0.05, 0.5, 0.5, 0.5,
 170     0.7, 0.7, 0.7, .078125);
 171   renderTeapot(14.0, 2.0, 0.05, 0.05, 0.0, 0.5, 0.5, 0.4,
 172     0.7, 0.7, 0.04, .078125);
 173   glFlush();
 174 }
 175
 176 void
 177 myReshape(int w, int h)
 178 {
 179   glViewport(0, 0, w, h);
 180   glMatrixMode(GL_PROJECTION);
 181   glLoadIdentity();
 182   if (w <= h)
 183     glOrtho(0.0, 16.0, 0.0, 18.0 * (GLfloat) h / (GLfloat) w,
 184       -10.0, 10.0);
 185   else
 186     glOrtho(0.0, 16.0 * (GLfloat) w / (GLfloat) h, 0.0, 18.0,
 187       -10.0, 10.0);
 188   glMatrixMode(GL_MODELVIEW);
 189 }
 190
 191 static void
 192 key(unsigned char k, int x, int y)
 193 {
 194   switch (k) {
 195   case 27:  /* Escape */
 196     exit(0);
 197     break;
 198   default:
 199     return;
 200   }
 201   glutPostRedisplay();
 202 }
 203
 204 /*
 205  * Main Loop Open window with initial window size, title bar, RGBA display
 206  * mode, and handle input events.
 207  */
 208 int
 209 main(int argc, char **argv)
 210 {
 211   glutInit(&argc, argv);
 212   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
 213   glutCreateWindow(argv[0]);
 214   myinit();
 215   glutReshapeFunc(myReshape);
 216   glutDisplayFunc(display);
 217   glutKeyboardFunc(key);
 218   glutMainLoop();
 219   return 0;             /* ANSI C requires main to return int. */
 220 }