src/glu/sgi/libnurbs/internals/mesher.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  * mesher.h
  33  *
  34  */
  35
  36 #ifndef __glumesher_h_
  37 #define __glumesher_h_
  38
  39 #include "hull.h"
  40
  41 class TrimRegion;
  42 class Backend;
  43 class Pool;
  44 // struct GridTrimVertex;
  45
  46
  47 class Mesher : virtual public TrimRegion, public Hull {
  48 public:
  49                         Mesher( Backend & );
  50                         ~Mesher( void );
  51     void                init( unsigned int );
  52     void                mesh( void );
  53
  54 private:
  55     static const float  ZERO;
  56     Backend&            backend;
  57
  58     Pool                p;
  59     unsigned int        stacksize;
  60     GridTrimVertex **   vdata;
  61     GridTrimVertex *    last[2];
  62     int                 itop;
  63     int                 lastedge;
  64
  65     inline void         openMesh( void );
  66     inline void         swapMesh( void );
  67     inline void         closeMesh( void );
  68     inline int          isCcw( int );
  69     inline int          isCw( int );
  70     inline void         clearStack( void );
  71     inline void         push( GridTrimVertex * );
  72     inline void         pop( long );
  73     inline void         move( int, int );
  74     inline int          equal( int, int );
  75     inline void         copy( int, int );
  76     inline void         output( int );
  77     void                addUpper( void );
  78     void                addLower( void );
  79     void                addLast( void );
  80     void                finishUpper( GridTrimVertex * );
  81     void                finishLower( GridTrimVertex * );
  82 };
  83 #endif /* __glumesher_h_ */