95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 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 OSGVOLUME_VOLUMETECHNIQUE
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#define OSGVOLUME_VOLUMETECHNIQUE 1
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#include <osg/Object>
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#include <osgUtil/UpdateVisitor>
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#include <osgUtil/CullVisitor>
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#include <osgVolume/Export>
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namespace osgVolume {
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class VolumeTile;
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/** Container for render to texture objects used when doing multi-pass volume rendering techniques.*/
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struct TileData : public osg::Referenced
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{
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TileData() : active(false) {}
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virtual void update(osgUtil::CullVisitor* cv) = 0;
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bool active;
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osg::NodePath nodePath;
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osg::ref_ptr<osg::RefMatrix> projectionMatrix;
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osg::ref_ptr<osg::RefMatrix> modelviewMatrix;
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osg::ref_ptr<osg::StateSet> stateset;
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};
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class OSGVOLUME_EXPORT VolumeTechnique : public osg::Object
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{
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public:
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VolumeTechnique();
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/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
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VolumeTechnique(const VolumeTechnique&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
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META_Object(osgVolume, VolumeTechnique);
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VolumeTile* getVolumeTile() { return _volumeTile; }
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const VolumeTile* getVolumeTile() const { return _volumeTile; }
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virtual void init();
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virtual void update(osgUtil::UpdateVisitor* nv);
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virtual bool isMoving(osgUtil::CullVisitor* nv);
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virtual void cull(osgUtil::CullVisitor* nv);
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/** Clean scene graph from any terrain technique specific nodes.*/
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virtual void cleanSceneGraph();
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/** Traverse the terrain subgraph.*/
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virtual void traverse(osg::NodeVisitor& nv);
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/** Called from VolumeScene to create the TileData container when a multi-pass technique is being used.
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* The TileData container caches any render to texture objects that are required. */
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virtual TileData* createTileData(osgUtil::CullVisitor* /*cv*/) { return 0; }
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protected:
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void setDirty(bool dirty);
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virtual ~VolumeTechnique();
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friend class osgVolume::VolumeTile;
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VolumeTile* _volumeTile;
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typedef std::map<osgUtil::CullVisitor::Identifier*, osg::Matrix> ModelViewMatrixMap;
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OpenThreads::Mutex _mutex;
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ModelViewMatrixMap _modelViewMatrixMap;
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};
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}
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#endif
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