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  34  * Unpublished-- rights reserved under the copyright laws of the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 static 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 static 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 static 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 static 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 }