361 lines
7.2 KiB
C
361 lines
7.2 KiB
C
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/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity 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 "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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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 Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 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 <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <GL/gl.h>
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#include <GL/glu.h>
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#include <math.h>
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#include "tk.h"
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#define INREAL float
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#define S_NUMPOINTS 13
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#define S_ORDER 3
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#define S_NUMKNOTS (S_NUMPOINTS + S_ORDER)
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#define T_NUMPOINTS 3
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#define T_ORDER 3
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#define T_NUMKNOTS (T_NUMPOINTS + T_ORDER)
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#define SQRT_TWO 1.41421356237309504880
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typedef INREAL Point[4];
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GLenum doubleBuffer, directRender;
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GLenum expectedError;
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GLint rotX = 40, rotY = 40;
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INREAL sknots[S_NUMKNOTS] = {
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-1.0, -1.0, -1.0, 0.0, 1.0, 2.0, 3.0, 4.0,
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4.0, 5.0, 6.0, 7.0, 8.0, 9.0, 9.0, 9.0
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};
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INREAL tknots[T_NUMKNOTS] = {
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1.0, 1.0, 1.0, 2.0, 2.0, 2.0
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};
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Point ctlpoints[S_NUMPOINTS][T_NUMPOINTS] = {
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{
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{
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4.0, 2.0, 2.0, 1.0
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},
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{
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4.0, 1.6, 2.5, 1.0
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},
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{
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4.0, 2.0, 3.0, 1.0
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}
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},
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{
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{
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5.0, 4.0, 2.0, 1.0
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},
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{
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5.0, 4.0, 2.5, 1.0
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},
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{
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5.0, 4.0, 3.0, 1.0
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}
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},
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{
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{
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6.0, 5.0, 2.0, 1.0
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},
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{
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6.0, 5.0, 2.5, 1.0
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},
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{
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6.0, 5.0, 3.0, 1.0
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}
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},
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{
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{
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SQRT_TWO*6.0, SQRT_TWO*6.0, SQRT_TWO*2.0, SQRT_TWO
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},
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{
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SQRT_TWO*6.0, SQRT_TWO*6.0, SQRT_TWO*2.5, SQRT_TWO
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},
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{
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SQRT_TWO*6.0, SQRT_TWO*6.0, SQRT_TWO*3.0, SQRT_TWO
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}
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},
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{
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{
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5.2, 6.7, 2.0, 1.0
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},
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{
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5.2, 6.7, 2.5, 1.0
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},
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{
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5.2, 6.7, 3.0, 1.0
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}
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},
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{
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*2.0, SQRT_TWO
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},
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*2.5, SQRT_TWO
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},
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*3.0, SQRT_TWO
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}
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},
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{
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{
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4.0, 5.2, 2.0, 1.0
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},
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{
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4.0, 4.6, 2.5, 1.0
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},
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{
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4.0, 5.2, 3.0, 1.0
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}
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},
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{
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*2.0, SQRT_TWO
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},
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*2.5, SQRT_TWO
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},
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{
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SQRT_TWO*4.0, SQRT_TWO*6.0, SQRT_TWO*3.0, SQRT_TWO
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}
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},
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{
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{
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2.8, 6.7, 2.0, 1.0
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},
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{
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2.8, 6.7, 2.5, 1.0
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},
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{
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2.8, 6.7, 3.0, 1.0
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}
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},
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{
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{
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SQRT_TWO*2.0, SQRT_TWO*6.0, SQRT_TWO*2.0, SQRT_TWO
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},
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{
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SQRT_TWO*2.0, SQRT_TWO*6.0, SQRT_TWO*2.5, SQRT_TWO
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},
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{
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SQRT_TWO*2.0, SQRT_TWO*6.0, SQRT_TWO*3.0, SQRT_TWO
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}
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},
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{
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{
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2.0, 5.0, 2.0, 1.0
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},
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{
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2.0, 5.0, 2.5, 1.0
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},
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{
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2.0, 5.0, 3.0, 1.0
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}
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},
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{
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{
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3.0, 4.0, 2.0, 1.0
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},
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{
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3.0, 4.0, 2.5, 1.0
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},
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{
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3.0, 4.0, 3.0, 1.0
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}
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},
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{
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{
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4.0, 2.0, 2.0, 1.0
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},
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{
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4.0, 1.6, 2.5, 1.0
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},
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{
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4.0, 2.0, 3.0, 1.0
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}
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}
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};
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GLUnurbsObj *theNurbs;
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static void ErrorCallback(GLenum which)
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{
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if (which != expectedError) {
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fprintf(stderr, "Unexpected error occured (%d):\n", which);
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fprintf(stderr, " %s\n", gluErrorString(which));
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}
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}
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static void Init(void)
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{
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theNurbs = gluNewNurbsRenderer();
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gluNurbsCallback(theNurbs, GLU_ERROR, ErrorCallback);
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gluNurbsProperty(theNurbs, GLU_SAMPLING_TOLERANCE, 15.0);
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gluNurbsProperty(theNurbs, GLU_DISPLAY_MODE, GLU_OUTLINE_PATCH);
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expectedError = GLU_INVALID_ENUM;
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gluNurbsProperty(theNurbs, ~0, 15.0);
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expectedError = GLU_NURBS_ERROR13;
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gluEndSurface(theNurbs);
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expectedError = 0;
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glColor3f(1.0, 1.0, 1.0);
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}
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static void Reshape(int width, int height)
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{
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glViewport(0, 0, (GLint)width, (GLint)height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glFrustum(-2.0, 2.0, -2.0, 2.0, 0.8, 10.0);
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gluLookAt(7.0, 4.5, 4.0, 4.5, 4.5, 2.5, 6.0, -3.0, 2.0);
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glMatrixMode(GL_MODELVIEW);
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}
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static GLenum Key(int key, GLenum mask)
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{
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switch (key) {
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case TK_ESCAPE:
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tkQuit();
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case TK_DOWN:
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rotX -= 5;
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break;
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case TK_UP:
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rotX += 5;
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break;
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case TK_LEFT:
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rotY -= 5;
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break;
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case TK_RIGHT:
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rotY += 5;
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break;
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default:
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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static void Draw(void)
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{
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glClear(GL_COLOR_BUFFER_BIT);
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glPushMatrix();
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glTranslatef(4.0, 4.5, 2.5);
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glRotatef(rotY, 1, 0, 0);
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glRotatef(rotX, 0, 1, 0);
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glTranslatef(-4.0, -4.5, -2.5);
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gluBeginSurface(theNurbs);
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gluNurbsSurface(theNurbs, S_NUMKNOTS, sknots, T_NUMKNOTS, tknots,
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4*T_NUMPOINTS, 4, &ctlpoints[0][0][0], S_ORDER,
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T_ORDER, GL_MAP2_VERTEX_4);
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gluEndSurface(theNurbs);
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glPopMatrix();
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glFlush();
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if (doubleBuffer) {
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tkSwapBuffers();
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}
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}
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static GLenum Args(int argc, char **argv)
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{
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GLint i;
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doubleBuffer = GL_FALSE;
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directRender = GL_FALSE;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-sb") == 0) {
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doubleBuffer = GL_FALSE;
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} else if (strcmp(argv[i], "-db") == 0) {
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doubleBuffer = GL_TRUE;
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} else if (strcmp(argv[i], "-dr") == 0) {
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directRender = GL_TRUE;
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} else if (strcmp(argv[i], "-ir") == 0) {
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directRender = GL_FALSE;
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} else {
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printf("%s (Bad option).\n", argv[i]);
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return GL_FALSE;
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}
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}
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return GL_TRUE;
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}
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void main(int argc, char **argv)
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{
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GLenum type;
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if (Args(argc, argv) == GL_FALSE) {
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tkQuit();
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}
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tkInitPosition(0, 0, 300, 300);
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type = TK_RGB;
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type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
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type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
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tkInitDisplayMode(type);
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if (tkInitWindow("NURBS Test") == GL_FALSE) {
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tkQuit();
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}
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Init();
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tkExposeFunc(Reshape);
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tkReshapeFunc(Reshape);
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tkKeyDownFunc(Key);
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tkDisplayFunc(Draw);
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tkExec();
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}
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