107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGUTIL_TRISTRIPVISITOR
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#define OSGUTIL_TRISTRIPVISITOR 1
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#include <osg/NodeVisitor>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osgUtil/Optimizer>
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#include <set>
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namespace osgUtil {
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/** A tri stripping visitor for converting Geometry surface primitives into tri strips.
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* The current implemention is based up Tanguy Fautre's triangulation code.
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*/
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class OSGUTIL_EXPORT TriStripVisitor : public osg::NodeVisitor
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{
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public:
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/// default to traversing all children.
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TriStripVisitor(Optimizer* optimizer=0) :
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osg::NodeVisitor( osg::NodeVisitor::TRAVERSE_ALL_CHILDREN ),
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_cacheSize( 16 ),
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_minStripSize( 2 ),
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_generateFourPointPrimitivesQuads ( false)
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{}
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/** Convert mesh primitives in Geometry into Tri Strips.
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* Converts all primitive types except points
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* and lines, linestrips which it leaves unchanged.
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*/
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void stripify(osg::Geometry& drawable);
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/** Stripfy the accumulated list of Geometry drawables.*/
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void stripify();
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/// accumulate the Geometry drawables to stripify
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virtual void apply(osg::Geode& geode);
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inline void setCacheSize( unsigned int size )
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{
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_cacheSize = size;
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}
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inline unsigned int getCacheSize()
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{
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return _cacheSize;
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}
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inline const unsigned int getCacheSize() const
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{
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return _cacheSize;
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}
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inline void setMinStripSize( unsigned int size )
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{
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_minStripSize = size;
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}
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inline unsigned int getMinStripSize()
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{
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return _minStripSize;
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}
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inline const unsigned int getMinStripSize() const
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{
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return _minStripSize;
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}
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inline bool isOperationPermissableForObject(const osg::Object* object) const
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{
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return _optimizer ? _optimizer->isOperationPermissableForObject(object,osgUtil::Optimizer::TRISTRIP_GEOMETRY) : true;
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}
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void setGenerateFourPointPrimitivesQuads(bool flag) { _generateFourPointPrimitivesQuads = flag; }
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bool getGenerateFourPointPrimitivesQuads() const { return _generateFourPointPrimitivesQuads; }
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private:
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typedef std::set<osg::Geometry*> GeometryList;
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Optimizer* _optimizer;
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unsigned int _cacheSize;
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unsigned int _minStripSize;
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GeometryList _geometryList;
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bool _generateFourPointPrimitivesQuads;
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};
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}
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#endif
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