dll/opengl/glu32/src/libnurbs/internals/monotonizer.h

   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  * monotonizer.h
  33  *
  34  */
  35
  36 #ifndef __glumonotonizer_h_
  37 #define __glumonotonizer_h_
  38
  39 #include "mysetjmp.h"
  40 #include "types.h"
  41
  42 class Arc;
  43 class ArcTessellator;
  44 class Pool;
  45 class Bin;
  46 class PwlArcPool;
  47 class Mapdesc;
  48
  49 class Monotonizer {
  50     ArcTessellator&     arctessellator;
  51     Pool&               arcpool;
  52     Pool&               pwlarcpool;
  53     jmp_buf&            nurbsJmpBuf;
  54
  55     enum dir            { down, same, up, none };
  56     void                tessellate( Arc *, REAL );
  57     void                monotonize( Arc *, Bin & );
  58     int                 isMonotone( Arc * );
  59 public:
  60                         Monotonizer( ArcTessellator& at, Pool& ap, Pool& p, jmp_buf& j )
  61                                 : arctessellator(at), arcpool(ap), pwlarcpool(p), nurbsJmpBuf(j) {}
  62     int                 decompose( Bin &, REAL );
  63 };
  64 #endif /* __glumonotonizer_h_ */