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+/*
+ * 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.
+ */
+
+/*
+ * nurbstess.h
+ *
+ */
+
+#ifndef __glunurbstess_h_
+#define __glunurbstess_h_
+
+#include "mysetjmp.h"
+#include "subdivider.h"
+#include "renderhints.h"
+#include "backend.h"
+#include "maplist.h"
+#include "reader.h"
+#include "nurbsconsts.h"
+
+struct Knotvector;
+class Quilt;
+class DisplayList;
+class BasicCurveEvaluator;
+class BasicSurfaceEvaluator;
+
+class NurbsTessellator {
+public:
+ NurbsTessellator( BasicCurveEvaluator &c,
+ BasicSurfaceEvaluator &e );
+ virtual ~NurbsTessellator( void );
+
+ void getnurbsproperty( long, INREAL * );
+ void getnurbsproperty( long, long, INREAL * );
+ void setnurbsproperty( long, INREAL );
+ void setnurbsproperty( long, long, INREAL );
+ void setnurbsproperty( long, long, INREAL * );
+ void setnurbsproperty( long, long, INREAL *, long, long );
+
+ // called before a tessellation begins/ends
+ virtual void bgnrender( void );
+ virtual void endrender( void );
+
+ // called to make a display list of the output vertices
+ virtual void makeobj( int n );
+ virtual void closeobj( void );
+
+ // called when a error occurs
+ virtual void errorHandler( int );
+
+ void bgnsurface( long );
+ void endsurface( void );
+ void bgntrim( void );
+ void endtrim( void );
+ void bgncurve( long );
+ void endcurve( void );
+ void pwlcurve( long, INREAL[], long, long );
+ void nurbscurve( long, INREAL[], long, INREAL[], long, long );
+ void nurbssurface( long, INREAL[], long, INREAL[], long, long,
+ INREAL[], long, long, long );
+
+ void defineMap( long, long, long );
+ void redefineMaps( void );
+
+ // recording of input description
+ void discardRecording( void * );
+ void * beginRecording( void );
+ void endRecording( void );
+ void playRecording( void * );
+
+ //for optimizing untrimmed nurbs in the case of domain distance sampling
+ void set_domain_distance_u_rate(REAL u_rate);
+ void set_domain_distance_v_rate(REAL v_rate);
+ void set_is_domain_distance_sampling(int flag);
+
+
+protected:
+ Renderhints renderhints;
+ Maplist maplist;
+ Backend backend;
+
+private:
+
+ void resetObjects( void );
+ int do_check_knots( Knotvector *, const char * );
+ void do_nurbserror( int );
+ void do_bgncurve( O_curve * );
+ void do_endcurve( void );
+ void do_freeall( void );
+ void do_freecurveall( O_curve * );
+ void do_freebgntrim( O_trim * );
+ void do_freebgncurve( O_curve * );
+ void do_freepwlcurve( O_pwlcurve * );
+ void do_freenurbscurve( O_nurbscurve * );
+ void do_freenurbssurface( O_nurbssurface * );
+ void do_freebgnsurface( O_surface * );
+ void do_bgnsurface( O_surface * );
+ void do_endsurface( void );
+ void do_bgntrim( O_trim * );
+ void do_endtrim( void );
+ void do_pwlcurve( O_pwlcurve * );
+ void do_nurbscurve( O_nurbscurve * );
+ void do_nurbssurface( O_nurbssurface * );
+ void do_freenurbsproperty( Property * );
+ void do_setnurbsproperty( Property * );
+ void do_setnurbsproperty2( Property * );
+
+ Subdivider subdivider;
+ JumpBuffer* jumpbuffer;
+ Pool o_pwlcurvePool;
+ Pool o_nurbscurvePool;
+ Pool o_curvePool;
+ Pool o_trimPool;
+ Pool o_surfacePool;
+ Pool o_nurbssurfacePool;
+ Pool propertyPool;
+public:
+ Pool quiltPool;
+private:
+ TrimVertexPool extTrimVertexPool;
+
+ int inSurface; /* bgnsurface seen */
+ int inCurve; /* bgncurve seen */
+ int inTrim; /* bgntrim seen */
+ int isCurveModified; /* curve changed */
+ int isTrimModified; /* trim curves changed */
+ int isSurfaceModified; /* surface changed */
+ int isDataValid; /* all data is good */
+ int numTrims; /* valid trim regions */
+ int playBack;
+
+ O_trim** nextTrim; /* place to link o_trim */
+ O_curve** nextCurve; /* place to link o_curve */
+ O_nurbscurve** nextNurbscurve; /* place to link o_nurbscurve */
+ O_pwlcurve** nextPwlcurve; /* place to link o_pwlcurve */
+ O_nurbssurface** nextNurbssurface; /* place to link o_nurbssurface */
+
+ O_surface* currentSurface;
+ O_trim* currentTrim;
+ O_curve* currentCurve;
+
+ DisplayList *dl;
+
+};
+
+#endif /* __glunurbstess_h_ */