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/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2009 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 OSGVOLUMESCENE
#define OSGVOLUMESCENE 1
#include <osg/Group>
#include <osg/Texture2D>
#include <osgUtil/CullVisitor>
#include <osgVolume/VolumeTile>
namespace osgVolume {
/** VolumeScene provides high level support for doing multi-pass rendering of volumes where the main scene to rendered to color and depth textures and then re-rendered for the purposes of volume rendering.*/
class OSGVOLUME_EXPORT VolumeScene : public osg::Group
{
public:
VolumeScene();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
VolumeScene(const VolumeScene&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Node(osgVolume, VolumeScene);
virtual void traverse(osg::NodeVisitor& nv);
struct TileData : public osg::Referenced
{
TileData() : active(false) {}
bool active;
osg::NodePath nodePath;
osg::ref_ptr<osg::RefMatrix> projectionMatrix;
osg::ref_ptr<osg::RefMatrix> modelviewMatrix;
osg::ref_ptr<osg::Texture2D> depthTexture;
osg::ref_ptr<osg::Camera> rttCamera;
osg::ref_ptr<osg::StateSet> stateset;
osg::ref_ptr<osg::Uniform> texgenUniform;
};
TileData* tileVisited(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile);
TileData* getTileData(osgUtil::CullVisitor* cv, osgVolume::VolumeTile* tile);
protected:
virtual ~VolumeScene();
typedef std::map< VolumeTile*, osg::ref_ptr<TileData> > Tiles;
class ViewData : public osg::Referenced
{
public:
ViewData();
void clearTiles();
void visitTile(VolumeTile* tile);
osg::ref_ptr<osg::Texture2D> _depthTexture;
osg::ref_ptr<osg::Texture2D> _colorTexture;
osg::ref_ptr<osg::Camera> _rttCamera;
osg::ref_ptr<osg::Node> _backdropSubgraph;
osg::ref_ptr<osg::Geometry> _geometry;
osg::ref_ptr<osg::Vec3Array> _vertices;
osg::ref_ptr<osg::StateSet> _stateset;
osg::ref_ptr<osg::Uniform> _viewportDimensionsUniform;
Tiles _tiles;
protected:
virtual ~ViewData() {}
};
typedef std::map< osgUtil::CullVisitor*, osg::ref_ptr<ViewData> > ViewDataMap;
OpenThreads::Mutex _viewDataMapMutex;
ViewDataMap _viewDataMap;
};
}
#endif
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