aboutsummaryrefslogtreecommitdiff
path: root/mesalib/src/glu/sgi/libnurbs/internals/subdivider.h
diff options
context:
space:
mode:
Diffstat (limited to 'mesalib/src/glu/sgi/libnurbs/internals/subdivider.h')
-rw-r--r--mesalib/src/glu/sgi/libnurbs/internals/subdivider.h200
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_ */