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- /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
- *
- * This library is open source and may be redistributed and/or modified under
- * the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
- * (at your option) any later version. The full license is in LICENSE file
- * included with this distribution, and on the openscenegraph.org website.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * OpenSceneGraph Public License for more details.
- */
- #ifndef OSGUTIL_TRISTRIPVISITOR
- #define OSGUTIL_TRISTRIPVISITOR 1
- #include <osg/NodeVisitor>
- #include <osg/Geode>
- #include <osg/Geometry>
- #include <osgUtil/Optimizer>
- #include <set>
- namespace osgUtil {
- /** A tri stripping visitor for converting Geometry surface primitives into tri strips.
- * The current implementation is based upon Tanguy Fautre's triangulation code.
- */
- class OSGUTIL_EXPORT TriStripVisitor : public BaseOptimizerVisitor
- {
- public:
- /// default to traversing all children.
- TriStripVisitor(Optimizer* optimizer=0) :
- BaseOptimizerVisitor( optimizer, Optimizer::TRISTRIP_GEOMETRY),
- _cacheSize( 16 ),
- _minStripSize( 2 ),
- _generateFourPointPrimitivesQuads ( false ),
- _mergeTriangleStrips( false ),
- _indexMesh( true )
- {}
- /** Convert mesh primitives in Geometry into Tri Strips.
- * Converts all primitive types except points
- * and lines, linestrips which it leaves unchanged.
- */
- void stripify(osg::Geometry& drawable);
- void mergeTriangleStrips(osg::Geometry::PrimitiveSetList& primitives);
- /** Stripify (make into strips of tria or quads) the accumulated list of Geometry drawables.*/
- void stripify();
- /// Accumulate the Geometry drawables to make into strips.
- virtual void apply(osg::Geometry& geom);
- inline void setCacheSize( unsigned int size )
- {
- _cacheSize = size;
- }
- inline unsigned int getCacheSize() const
- {
- return _cacheSize;
- }
- inline void setMinStripSize( unsigned int size )
- {
- _minStripSize = size;
- }
- inline unsigned int getMinStripSize() const
- {
- return _minStripSize;
- }
- inline void setIndexMesh( bool allow )
- {
- _indexMesh = allow;
- }
- inline bool getIndexMesh() const
- {
- return _indexMesh;
- }
- void setGenerateFourPointPrimitivesQuads(bool flag) { _generateFourPointPrimitivesQuads = flag; }
- bool getGenerateFourPointPrimitivesQuads() const { return _generateFourPointPrimitivesQuads; }
- void setMergeTriangleStrips(bool flag) { _mergeTriangleStrips = flag; }
- bool getMergeTriangleStrips() const { return _mergeTriangleStrips; }
- private:
- typedef std::set<osg::Geometry*> GeometryList;
- unsigned int _cacheSize;
- unsigned int _minStripSize;
- GeometryList _geometryList;
- bool _generateFourPointPrimitivesQuads;
- bool _mergeTriangleStrips;
- bool _indexMesh;
- };
- }
- #endif
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