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(C) 1992, Silicon Graphics, Inc. * * * * These coded instructions, statements, and computer programs contain * * unpublished proprietary information of Silicon Graphics, Inc., and * * are protected by Federal copyright law.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