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158 lines
4.8 KiB
158 lines
4.8 KiB
#ifndef __glusubdivider_h_
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#define __glusubdivider_h_
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/**************************************************************************
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* *
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* Copyright (C) 1992, Silicon Graphics, Inc. *
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* *
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* These coded instructions, statements, and computer programs contain *
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* unpublished proprietary information of Silicon Graphics, Inc., and *
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* are protected by Federal copyright law. They may not be disclosed *
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* to third parties or copied or duplicated in any form, in whole or *
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* in part, without the prior written consent of Silicon Graphics, Inc. *
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* *
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**************************************************************************/
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/*
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* subdivider.h - $Revision: 1.1 $
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*/
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#include "mysetjmp.h"
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#include "bin.h"
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#include "flist.h"
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#include "slicer.h"
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#include "arctess.h"
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#include "trimvert.h"
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#include "trimpool.h"
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class Arc;
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class Pool;
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class Renderhints;
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class Backend;
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class Quilt;
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class Patchlist;
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class Curvelist;
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#ifdef NT
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struct JumpBuffer;
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#else
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class JumpBuffer;
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#endif
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class Subdivider {
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public:
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Subdivider( Renderhints&, Backend& );
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~Subdivider( void );
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void clear( void );
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void beginTrims( void ) {}
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void beginLoop( void );
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void addArc( REAL *, Quilt *, long );
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void addArc( int, TrimVertex *, long );
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void endLoop( void ) {}
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void endTrims( void ) {}
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void beginQuilts( void );
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void addQuilt( Quilt * );
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void endQuilts( void ) {}
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void drawCurves( void );
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void drawSurfaces( long );
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int ccwTurn_sl( Arc *, Arc * );
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int ccwTurn_sr( Arc *, Arc * );
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int ccwTurn_tl( Arc *, Arc * );
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int ccwTurn_tr( Arc *, Arc * );
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void setJumpbuffer( JumpBuffer * );
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private:
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void classify_headonleft_s( Bin &, Bin &, Bin &, REAL );
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void classify_tailonleft_s( Bin &, Bin &, Bin &, REAL );
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void classify_headonright_s( Bin &, Bin &, Bin &, REAL );
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void classify_tailonright_s( Bin &, Bin &, Bin &, REAL );
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void classify_headonleft_t( Bin &, Bin &, Bin &, REAL );
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void classify_tailonleft_t( Bin &, Bin &, Bin &, REAL );
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void classify_headonright_t( Bin &, Bin &, Bin &, REAL );
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void classify_tailonright_t( Bin &, Bin &, Bin &, REAL );
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enum dir { down, same, up, none };
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void tessellate( Arc *, REAL );
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void monotonize( Arc *, Bin & );
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int isMonotone( Arc * );
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int decompose( Bin &, REAL );
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Slicer slicer;
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ArcTessellator arctessellator;
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Pool arcpool;
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Pool bezierarcpool;
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Pool pwlarcpool;
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TrimVertexPool trimvertexpool;
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JumpBuffer* jumpbuffer;
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Renderhints& renderhints;
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Backend& backend;
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Bin initialbin;
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Arc * pjarc;
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int s_index;
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int t_index;
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Quilt * qlist;
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Flist spbrkpts;
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Flist tpbrkpts;
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Flist smbrkpts;
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Flist tmbrkpts;
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REAL stepsizes[4];
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int showDegenerate;
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int isArcTypeBezier;
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void samplingSplit( Curvelist&, int );
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void subdivideInS( Bin& );
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void splitInS( Bin&, int, int );
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void splitInT( Bin&, int, int );
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void samplingSplit( Bin&, Patchlist&, int, int );
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void nonSamplingSplit( Bin&, Patchlist&, int, int );
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void tessellation( Bin&, Patchlist& );
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void monosplitInS( Bin&, int, int );
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void monosplitInT( Bin&, int, int );
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void outline( Bin & );
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void freejarcs( Bin & );
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void render( Bin & );
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void split( Bin &, Bin &, Bin &, int, REAL );
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void tessellate( Bin &, REAL, REAL, REAL, REAL );
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inline void setDegenerate( void ) { showDegenerate = 1; }
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inline void setNonDegenerate( void ) { showDegenerate = 0; }
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inline int showingDegenerate( void ) { return showDegenerate; }
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inline void setArcTypeBezier( void ) { isArcTypeBezier = 1; }
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inline void setArcTypePwl( void ) { isArcTypeBezier = 0; }
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inline int isBezierArcType( void ) { return isArcTypeBezier; }
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void makeBorderTrim( const REAL *, const REAL * );
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void split( Bin &, int, const REAL *, int, int );
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void partition( Bin &, Bin &, Bin &, Bin &, Bin &, int, REAL );
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void findIrregularS( Bin & );
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void findIrregularT( Bin & );
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inline int bbox( TrimVertex *, TrimVertex *, TrimVertex *, int );
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static int bbox( REAL, REAL, REAL, REAL, REAL, REAL );
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static int ccw( TrimVertex *, TrimVertex *, TrimVertex * );
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void join_s( Bin &, Bin &, Arc *, Arc * );
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void join_t( Bin &, Bin &, Arc *, Arc * );
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int arc_split( Arc *, int, REAL, int );
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void check_s( Arc *, Arc * );
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void check_t( Arc *, Arc * );
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inline void link( Arc *, Arc *, Arc *, Arc * );
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inline void simple_link( Arc *, Arc * );
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};
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inline void
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Subdivider::beginLoop( void )
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{
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pjarc = 0;
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}
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#endif /* __glusubdivider_h_ */
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