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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 OSGTERRAIN_GEOMETRYTECHNIQUE
#define OSGTERRAIN_GEOMETRYTECHNIQUE 1
#include <osg/MatrixTransform>
#include <osg/Geode>
#include <osg/Geometry>
#include <osgTerrain/TerrainTechnique>
#include <osgTerrain/Locator>
namespace osgTerrain {
class OSGTERRAIN_EXPORT GeometryTechnique : public TerrainTechnique
{
public:
GeometryTechnique();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
GeometryTechnique(const GeometryTechnique&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Object(osgTerrain, GeometryTechnique);
virtual void init(int dirtyMask, bool assumeMultiThreaded);
virtual Locator* computeMasterLocator();
virtual void update(osgUtil::UpdateVisitor* nv);
virtual void cull(osgUtil::CullVisitor* nv);
/** Traverse the terain subgraph.*/
virtual void traverse(osg::NodeVisitor& nv);
virtual void cleanSceneGraph();
void setFilterBias(float filterBias);
float getFilterBias() const { return _filterBias; }
void setFilterWidth(float filterWidth);
float getFilterWidth() const { return _filterWidth; }
void setFilterMatrix(const osg::Matrix3& matrix);
osg::Matrix3& getFilterMatrix() { return _filterMatrix; }
const osg::Matrix3& getFilterMatrix() const { return _filterMatrix; }
enum FilterType
{
GAUSSIAN,
SMOOTH,
SHARPEN
};
void setFilterMatrixAs(FilterType filterType);
/** If State is non-zero, this function releases any associated OpenGL objects for
* the specified graphics context. Otherwise, releases OpenGL objects
* for all graphics contexts. */
virtual void releaseGLObjects(osg::State* = 0) const;
protected:
virtual ~GeometryTechnique();
class BufferData : public osg::Referenced
{
public:
BufferData() {}
osg::ref_ptr<osg::MatrixTransform> _transform;
osg::ref_ptr<osg::Geode> _geode;
osg::ref_ptr<osg::Geometry> _geometry;
protected:
~BufferData() {}
};
virtual osg::Vec3d computeCenterModel(BufferData& buffer, Locator* masterLocator);
virtual void generateGeometry(BufferData& buffer, Locator* masterLocator, const osg::Vec3d& centerModel);
virtual void applyColorLayers(BufferData& buffer);
virtual void applyTransparency(BufferData& buffer);
OpenThreads::Mutex _writeBufferMutex;
osg::ref_ptr<BufferData> _currentBufferData;
osg::ref_ptr<BufferData> _newBufferData;
float _filterBias;
osg::ref_ptr<osg::Uniform> _filterBiasUniform;
float _filterWidth;
osg::ref_ptr<osg::Uniform> _filterWidthUniform;
osg::Matrix3 _filterMatrix;
osg::ref_ptr<osg::Uniform> _filterMatrixUniform;
};
}
#endif
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