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Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/internals/subdivider.h')
| -rw-r--r-- | mesalib/src/glu/sgi/libnurbs/internals/subdivider.h | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/mesalib/src/glu/sgi/libnurbs/internals/subdivider.h b/mesalib/src/glu/sgi/libnurbs/internals/subdivider.h new file mode 100644 index 000000000..4d5395181 --- /dev/null +++ b/mesalib/src/glu/sgi/libnurbs/internals/subdivider.h @@ -0,0 +1,200 @@ +/* + * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008) + * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice including the dates of first publication and + * either this permission notice or a reference to + * http://oss.sgi.com/projects/FreeB/ + * shall be included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, + * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF + * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + * Except as contained in this notice, the name of Silicon Graphics, Inc. + * shall not be used in advertising or otherwise to promote the sale, use or + * other dealings in this Software without prior written authorization from + * Silicon Graphics, Inc. + */ + +/* + * subdivider.h + * + */ + +#ifndef __glusubdivider_h_ +#define __glusubdivider_h_ + +#include "mysetjmp.h" +#include "bin.h" +#include "flist.h" +#include "slicer.h" +#include "arctess.h" +#include "trimvertex.h" +#include "trimvertpool.h" + +class Arc; +class Pool; +class Renderhints; +class Quilt; +class Patchlist; +class Curvelist; +struct JumpBuffer; + +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_ptr, Arc_ptr ); + int ccwTurn_sr( Arc_ptr , Arc_ptr ); + int ccwTurn_tl( Arc_ptr , Arc_ptr ); + int ccwTurn_tr( Arc_ptr , Arc_ptr ); + + void setJumpbuffer( JumpBuffer * ); + + void set_domain_distance_u_rate(REAL u_rate) + { + domain_distance_u_rate = u_rate; + } + void set_domain_distance_v_rate(REAL v_rate) + { + domain_distance_v_rate = v_rate; + } + void set_is_domain_distance_sampling(int flag) + { + is_domain_distance_sampling = flag; + } + +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_ptr, REAL ); + void monotonize( Arc_ptr , Bin & ); + int isMonotone( Arc_ptr ); + 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_ptr 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_ptr, Arc_ptr ); + void join_t( Bin &, Bin &, Arc_ptr , Arc_ptr ); + int arc_split( Arc_ptr , int, REAL, int ); + void check_s( Arc_ptr , Arc_ptr ); + void check_t( Arc_ptr , Arc_ptr ); + inline void link( Arc_ptr , Arc_ptr , Arc_ptr , Arc_ptr ); + inline void simple_link( Arc_ptr , Arc_ptr ); + + Bin* makePatchBoundary( const REAL *from, const REAL *to ); + + /*in domain distance method, the tessellation is controled by two numbers: + *GLU_U_STEP: number of u-segments per unit u length of domain + *GLU_V_STEP: number of v-segments per unit v length of domain + *These two numbers are normally stored in mapdesc->maxs(t)rate. + *I (ZL) put these two numbers here so that I can optimize the untrimmed + *case in the case of domain distance sampling. + *These two numbers are set by set_domain_distance_u_rate() and ..._v_..(). + */ + REAL domain_distance_u_rate; + REAL domain_distance_v_rate; + int is_domain_distance_sampling; +}; + +inline void +Subdivider::beginLoop( void ) +{ + pjarc = 0; +} + + +#endif /* __glusubdivider_h_ */ |