107 lines
3.2 KiB
C++
107 lines
3.2 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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 implemention is based up Tanguy Fautre's triangulation code.
|
|
*/
|
|
class OSGUTIL_EXPORT TriStripVisitor : public osg::NodeVisitor
|
|
{
|
|
public:
|
|
|
|
/// default to traversing all children.
|
|
TriStripVisitor(Optimizer* =0) :
|
|
osg::NodeVisitor( osg::NodeVisitor::TRAVERSE_ALL_CHILDREN ),
|
|
_cacheSize( 16 ),
|
|
_minStripSize( 2 ),
|
|
_generateFourPointPrimitivesQuads ( false)
|
|
{}
|
|
|
|
/** 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);
|
|
|
|
/** Stripfy the accumulated list of Geometry drawables.*/
|
|
void stripify();
|
|
|
|
/// accumulate the Geometry drawables to stripify
|
|
virtual void apply(osg::Geode& geode);
|
|
|
|
inline void setCacheSize( unsigned int size )
|
|
{
|
|
_cacheSize = size;
|
|
}
|
|
|
|
inline unsigned int getCacheSize()
|
|
{
|
|
return _cacheSize;
|
|
}
|
|
|
|
inline const unsigned int getCacheSize() const
|
|
{
|
|
return _cacheSize;
|
|
}
|
|
|
|
inline void setMinStripSize( unsigned int size )
|
|
{
|
|
_minStripSize = size;
|
|
}
|
|
|
|
inline unsigned int getMinStripSize()
|
|
{
|
|
return _minStripSize;
|
|
}
|
|
|
|
inline const unsigned int getMinStripSize() const
|
|
{
|
|
return _minStripSize;
|
|
}
|
|
|
|
inline bool isOperationPermissableForObject(const osg::Object* object) const
|
|
{
|
|
return _optimizer ? _optimizer->isOperationPermissableForObject(object,osgUtil::Optimizer::TRISTRIP_GEOMETRY) : true;
|
|
}
|
|
|
|
void setGenerateFourPointPrimitivesQuads(bool flag) { _generateFourPointPrimitivesQuads = flag; }
|
|
bool getGenerateFourPointPrimitivesQuads() const { return _generateFourPointPrimitivesQuads; }
|
|
|
|
|
|
private:
|
|
|
|
typedef std::set<osg::Geometry*> GeometryList;
|
|
|
|
Optimizer* _optimizer;
|
|
unsigned int _cacheSize;
|
|
unsigned int _minStripSize;
|
|
GeometryList _geometryList;
|
|
bool _generateFourPointPrimitivesQuads;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|