src/glu/sgi/libnurbs/internals/mesher.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  * mesher.h
  37  *
  38  */
  39
  40 #ifndef __glumesher_h_
  41 #define __glumesher_h_
  42
  43 #include "hull.h"
  44
  45 class TrimRegion;
  46 class Backend;
  47 class Pool;
  48 // struct GridTrimVertex;
  49
  50
  51 class Mesher : virtual public TrimRegion, public Hull {
  52 public:
  53                         Mesher( Backend & );
  54                         ~Mesher( void );
  55     void                init( unsigned int );
  56     void                mesh( void );
  57
  58 private:
  59     static const float  ZERO;
  60     Backend&            backend;
  61
  62     Pool                p;
  63     unsigned int        stacksize;
  64     GridTrimVertex **   vdata;
  65     GridTrimVertex *    last[2];
  66     int                 itop;
  67     int                 lastedge;
  68
  69     inline void         openMesh( void );
  70     inline void         swapMesh( void );
  71     inline void         closeMesh( void );
  72     inline int          isCcw( int );
  73     inline int          isCw( int );
  74     inline void         clearStack( void );
  75     inline void         push( GridTrimVertex * );
  76     inline void         pop( long );
  77     inline void         move( int, int );
  78     inline int          equal( int, int );
  79     inline void         copy( int, int );
  80     inline void         output( int );
  81     void                addUpper( void );
  82     void                addLower( void );
  83     void                addLast( void );
  84     void                finishUpper( GridTrimVertex * );
  85     void                finishLower( GridTrimVertex * );
  86 };
  87 #endif /* __glumesher_h_ */