svn merge ^/branches/released . --username marha

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_ */