1 /*
2  * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3  * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice including the dates of first publication and
13  * either this permission notice or a reference to
14  * http://oss.sgi.com/projects/FreeB/
15  * shall be included in all copies or substantial portions of the Software.
16  *
17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20  * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23  * SOFTWARE.
24  *
25  * Except as contained in this notice, the name of Silicon Graphics, Inc.
26  * shall not be used in advertising or otherwise to promote the sale, use or
27  * other dealings in this Software without prior written authorization from
28  * Silicon Graphics, Inc.
29  */
30 
31 /*
32  * arctess.h
33  *
34  */
35 
36 #ifndef __gluarctess_h_
37 #define __gluarctess_h_
38 
39 #include "defines.h"
40 //#include "types.h"
41 #include "arc.h"
42 
43 struct BezierArc;
44 class Pool;
45 class TrimVertexPool;
46 
47 class ArcTessellator {
48 public:
49 			ArcTessellator( TrimVertexPool&, Pool& );
50 			~ArcTessellator( void );
51     void		bezier( Arc_ptr, REAL, REAL, REAL, REAL );
52     void		pwl( Arc_ptr, REAL, REAL, REAL, REAL, REAL );
53     void		pwl_left( Arc_ptr, REAL, REAL, REAL, REAL );
54     void		pwl_right( Arc_ptr, REAL, REAL, REAL, REAL );
55     void		pwl_top( Arc_ptr, REAL, REAL, REAL, REAL );
56     void		pwl_bottom( Arc_ptr, REAL, REAL, REAL, REAL );
57     void		tessellateLinear( Arc_ptr, REAL, REAL, int );
58     void		tessellateNonlinear( Arc_ptr, REAL, REAL, int );
59 private:
60     static const REAL 	gl_Bernstein[][MAXORDER][MAXORDER];
61     Pool&		pwlarcpool;
62     TrimVertexPool&	trimvertexpool;
63     static void		trim_power_coeffs( BezierArc *, REAL[MAXORDER], int );
64 };
65 
66 #endif /* __gluarctess_h_ */
67