201 lines
6.5 KiB
C
201 lines
6.5 KiB
C
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/*
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* freeglut_teapot.c
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*
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* Teapot(tm) rendering code.
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*
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* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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* Written by Pawel W. Olszta, <olszta@sourceforge.net>
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* Creation date: Fri Dec 24 1999
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* Original teapot code copyright follows:
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*/
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/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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*
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* ALL RIGHTS RESERVED
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*
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* Permission to use, copy, modify, and distribute this software
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* for any purpose and without fee is hereby granted, provided
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* that the above copyright notice appear in all copies and that
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* both the copyright notice and this permission notice appear in
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* supporting documentation, and that the name of Silicon
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* Graphics, Inc. not be used in advertising or publicity
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* pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU
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* "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR
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* OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. IN NO
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* EVENT SHALL SILICON GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE
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* ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER,
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* INCLUDING WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE,
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* SAVINGS OR REVENUE, OR THE CLAIMS OF THIRD PARTIES, WHETHER OR
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* NOT SILICON GRAPHICS, INC. HAS BEEN ADVISED OF THE POSSIBILITY
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* OF SUCH LOSS, HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* ARISING OUT OF OR IN CONNECTION WITH THE POSSESSION, USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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*
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer
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* Software clause at DFARS 252.227-7013 and/or in similar or
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* successor clauses in the FAR or the DOD or NASA FAR
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* Supplement. Unpublished-- rights reserved under the copyright
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* laws of the United States. Contractor/manufacturer is Silicon
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* Graphics, Inc., 2011 N. Shoreline Blvd., Mountain View, CA
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* 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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*/
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#include <GL/freeglut.h>
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#include "freeglut_internal.h"
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#include "freeglut_teapot_data.h"
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/* -- PRIVATE FUNCTIONS ---------------------------------------------------- */
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static void fghTeapot( GLint grid, GLdouble scale, GLenum type )
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{
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#if defined(_WIN32_WCE)
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int i, numV=sizeof(strip_vertices)/4, numI=sizeof(strip_normals)/4;
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#else
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double p[4][4][3], q[4][4][3], r[4][4][3], s[4][4][3];
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long i, j, k, l;
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#endif
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glPushAttrib( GL_ENABLE_BIT | GL_EVAL_BIT );
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glEnable( GL_AUTO_NORMAL );
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glEnable( GL_NORMALIZE );
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glEnable( GL_MAP2_VERTEX_3 );
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glEnable( GL_MAP2_TEXTURE_COORD_2 );
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glPushMatrix();
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glRotated( 270.0, 1.0, 0.0, 0.0 );
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glScaled( 0.5 * scale, 0.5 * scale, 0.5 * scale );
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glTranslated( 0.0, 0.0, -1.5 );
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#if defined(_WIN32_WCE)
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glRotated( 90.0, 1.0, 0.0, 0.0 );
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glBegin( GL_TRIANGLE_STRIP );
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for( i = 0; i < numV-1; i++ )
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{
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int vidx = strip_vertices[i],
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nidx = strip_normals[i];
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if( vidx != -1 )
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{
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glNormal3fv( normals[nidx] );
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glVertex3fv( vertices[vidx] );
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}
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else
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{
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glEnd();
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glBegin( GL_TRIANGLE_STRIP );
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}
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}
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glEnd();
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#else
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for (i = 0; i < 10; i++) {
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for (j = 0; j < 4; j++) {
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for (k = 0; k < 4; k++) {
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for (l = 0; l < 3; l++) {
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p[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
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q[j][k][l] = cpdata[patchdata[i][j * 4 + (3 - k)]][l];
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if (l == 1)
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q[j][k][l] *= -1.0;
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if (i < 6) {
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r[j][k][l] =
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cpdata[patchdata[i][j * 4 + (3 - k)]][l];
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if (l == 0)
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r[j][k][l] *= -1.0;
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s[j][k][l] = cpdata[patchdata[i][j * 4 + k]][l];
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if (l == 0)
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s[j][k][l] *= -1.0;
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if (l == 1)
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s[j][k][l] *= -1.0;
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}
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}
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}
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}
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glMap2d(GL_MAP2_TEXTURE_COORD_2, 0.0, 1.0, 2, 2, 0.0, 1.0, 4, 2,
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&tex[0][0][0]);
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glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
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&p[0][0][0]);
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glMapGrid2d(grid, 0.0, 1.0, grid, 0.0, 1.0);
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glEvalMesh2(type, 0, grid, 0, grid);
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glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
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&q[0][0][0]);
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glEvalMesh2(type, 0, grid, 0, grid);
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if (i < 6) {
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glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
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&r[0][0][0]);
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glEvalMesh2(type, 0, grid, 0, grid);
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glMap2d(GL_MAP2_VERTEX_3, 0.0, 1.0, 3, 4, 0.0, 1.0, 12, 4,
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&s[0][0][0]);
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glEvalMesh2(type, 0, grid, 0, grid);
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}
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}
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#endif /* defined(_WIN32_WCE) */
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glPopMatrix();
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glPopAttrib();
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}
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/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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/*
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* Renders a beautiful wired teapot...
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*/
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void FGAPIENTRY glutWireTeapot( GLdouble size )
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{
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FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWireTeapot" );
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/* We will use the general teapot rendering code */
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fghTeapot( 10, size, GL_LINE );
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}
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/*
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* Renders a beautiful filled teapot...
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*/
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void FGAPIENTRY glutSolidTeapot( GLdouble size )
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{
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FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSolidTeapot" );
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/* We will use the general teapot rendering code */
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fghTeapot( 7, size, GL_FILL );
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}
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/*** END OF FILE ***/
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