src/glu/sgi/libnurbs/internals/arctess.h

   1 /*
   2 ** License Applicability. Except to the extent portions of this file are
   3 ** made subject to an alternative license as permitted in the SGI Free
   4 ** Software License B, Version 1.1 (the "License"), the contents of this
   5 ** file are subject only to the provisions of the License. You may not use
   6 ** this file except in compliance with the License. You may obtain a copy
   7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
   8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
   9 **
  10 ** http://oss.sgi.com/projects/FreeB
  11 **
  12 ** Note that, as provided in the License, the Software is distributed on an
  13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
  14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
  15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
  16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
  17 **
  18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
  19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
  20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
  21 ** Copyright in any portions created by third parties is as indicated
  22 ** elsewhere herein. All Rights Reserved.
  23 **
  24 ** Additional Notice Provisions: The application programming interfaces
  25 ** established by SGI in conjunction with the Original Code are The
  26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
  27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
  28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
  29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
  30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
  31 ** published by SGI, but has not been independently verified as being
  32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
  33 */
  34
  35 /*
  36  * arctess.h
  37  *
  38  */
  39
  40 #ifndef __gluarctess_h_
  41 #define __gluarctess_h_
  42
  43 #include "defines.h"
  44 #include "types.h"
  45 #include "arc.h"
  46
  47 struct BezierArc;
  48 class Pool;
  49 class TrimVertexPool;
  50
  51 class ArcTessellator {
  52 public:
  53                         ArcTessellator( TrimVertexPool&, Pool& );
  54                         ~ArcTessellator( void );
  55     void                bezier( Arc_ptr, REAL, REAL, REAL, REAL );
  56     void                pwl( Arc_ptr, REAL, REAL, REAL, REAL, REAL );
  57     void                pwl_left( Arc_ptr, REAL, REAL, REAL, REAL );
  58     void                pwl_right( Arc_ptr, REAL, REAL, REAL, REAL );
  59     void                pwl_top( Arc_ptr, REAL, REAL, REAL, REAL );
  60     void                pwl_bottom( Arc_ptr, REAL, REAL, REAL, REAL );
  61     void                tessellateLinear( Arc_ptr, REAL, REAL, int );
  62     void                tessellateNonlinear( Arc_ptr, REAL, REAL, int );
  63 private:
  64     static const REAL   gl_Bernstein[][MAXORDER][MAXORDER];
  65     Pool&               pwlarcpool;
  66     TrimVertexPool&     trimvertexpool;
  67     static void         trim_power_coeffs( BezierArc *, REAL[MAXORDER], int );
  68 };
  69
  70 #endif /* __gluarctess_h_ */