src/freeglut_teapot.cxx

   1 /*
   2  * freeglut_teapot.c
   3  *
   4  * Teapot(tm) rendering code.
   5  *
   6  * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
   7  * Written by Pawel W. Olszta, <olszta@sourceforge.net>
   8  * Creation date: Fri Dec 24 1999
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a
  11  * copy of this software and associated documentation files (the "Software"),
  12  * to deal in the Software without restriction, including without limitation
  13  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  14  * and/or sell copies of the Software, and to permit persons to whom the
  15  * Software is furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included
  18  * in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  23  * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
  24  * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  25  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  */
  27
  28 /*
  29  * Original teapot code copyright follows:
  30  */
  31
  32 /*
  33  * (c) Copyright 1993, Silicon Graphics, Inc.
  34  *
  35  * ALL RIGHTS RESERVED
  36  *
  37  * Permission to use, copy, modify, and distribute this software
  38  * for any purpose and without fee is hereby granted, provided
  39  * that the above copyright notice appear in all copies and that
  40  * both the copyright notice and this permission notice appear in
  41  * supporting documentation, and that the name of Silicon
  42  * Graphics, Inc. not be used in advertising or publicity
  43  * pertaining to distribution of the software without specific,
  44  * written prior permission.
  45  *
  46  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
  47  * "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
  48  * OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
  49  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  IN NO
  50  * EVENT SHALL SILICON GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE
  51  * ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
  52  * CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
  53  * INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
  54  * SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
  55  * NOT SILICON GRAPHICS, INC.  HAS BEEN ADVISED OF THE POSSIBILITY
  56  * OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  57  * ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
  58  * PERFORMANCE OF THIS SOFTWARE.
  59  *
  60  * US Government Users Restricted Rights
  61  *
  62  * Use, duplication, or disclosure by the Government is subject to
  63  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  64  * (c)(1)(ii) of the Rights in Technical Data and Computer
  65  * Software clause at DFARS 252.227-7013 and/or in similar or
  66  * successor clauses in the FAR or the DOD or NASA FAR
  67  * Supplement.  Unpublished-- rights reserved under the copyright
  68  * laws of the United States.  Contractor/manufacturer is Silicon
  69  * Graphics, Inc., 2011 N.  Shoreline Blvd., Mountain View, CA
  70  * 94039-7311.
  71  *
  72  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  73  */
  74
  75 #include <FL/glut.H>
  76 #include "freeglut_teapot_data.h"
  77
  78 /* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
  79
  80
  81 static void fghTeapot( GLint grid, GLdouble scale, GLenum type )
  82 {
  83     double p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
  84     long i, j, k, l;
  85
  86     glPushAttrib( GL_ENABLE_BIT | GL_EVAL_BIT );
  87     glEnable( GL_AUTO_NORMAL );
  88     glEnable( GL_NORMALIZE );
  89     glEnable( GL_MAP2_VERTEX_3 );
  90     glEnable( GL_MAP2_TEXTURE_COORD_2 );
  91
  92     glPushMatrix();
  93     glRotated( 270.0, 1.0, 0.0, 0.0 );
  94     glScaled( 0.5 * scale, 0.5 * scale, 0.5 * scale );
  95     glTranslated( 0.0, 0.0, -1.5 );
  96
  97     for (i = 0; i < 10; i++) {
  98       for (j = 0; j < 4; j++) {
  99         for (k = 0; k < 4; k++) {
 100           for (l = 0; l < 3; l++) {
 101             p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
 102             q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
 103             if (l == 1)
 104               q[j][k][l] *= -1.0;
 105             if (i < 6) {
 106               r[j][k][l] =
 107                 cpdata[patchdata[i][j * 4 + (3 - k)]][l];
 108               if (l == 0)
 109                 r[j][k][l] *= -1.0;
 110               s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
 111               if (l == 0)
 112                 s[j][k][l] *= -1.0;
 113               if (l == 1)
 114                 s[j][k][l] *= -1.0;
 115             }
 116           }
 117         }
 118       }
 119
 120       glMap2d(GL_MAP2_TEXTURE_COORD_2, 0.0, 1.0, 2, 2, 0.0, 1.0, 4, 2,
 121         &tex[0][0][0]);
 122       glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
 123         &p[0][0][0]);
 124       glMapGrid2d(grid, 0.0, 1.0, grid, 0.0, 1.0);
 125       glEvalMesh2(type, 0, grid, 0, grid);
 126       glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
 127         &q[0][0][0]);
 128       glEvalMesh2(type, 0, grid, 0, grid);
 129       if (i < 6) {
 130         glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
 131           &r[0][0][0]);
 132         glEvalMesh2(type, 0, grid, 0, grid);
 133         glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
 134           &s[0][0][0]);
 135         glEvalMesh2(type, 0, grid, 0, grid);
 136       }
 137     }
 138
 139     glPopMatrix();
 140     glPopAttrib();
 141 }
 142
 143
 144 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
 145
 146 /*
 147  * Renders a beautiful wired teapot...
 148  */
 149 void glutWireTeapot( GLdouble size )
 150 {
 151     /* We will use the general teapot rendering code */
 152     fghTeapot( 10, size, GL_LINE );
 153 }
 154
 155 /*
 156  * Renders a beautiful filled teapot...
 157  */
 158 void glutSolidTeapot( GLdouble size )
 159 {
 160     /* We will use the general teapot rendering code */
 161     fghTeapot( 7, size, GL_FILL );
 162 }
 163
 164 /*** END OF FILE ***/