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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_TERRAINTECHNIQUE
#define OSGTERRAIN_TERRAINTECHNIQUE 1
#include <osg/Object>
#include <osgUtil/UpdateVisitor>
#include <osgUtil/CullVisitor>
#include <osgTerrain/Export>
namespace osgTerrain {
class TerrainTile;
class OSGTERRAIN_EXPORT TerrainNeighbours
{
public:
TerrainNeighbours();
~TerrainNeighbours();
void clear();
void addNeighbour(TerrainTile* tile);
void removeNeighbour(TerrainTile* tile);
bool containsNeighbour(TerrainTile* tile) const;
protected:
TerrainNeighbours(const TerrainNeighbours& /*tn*/) {}
TerrainNeighbours& operator = (const TerrainNeighbours& /*rhs*/) { return *this; }
typedef std::set<TerrainTile*> Neighbours;
mutable OpenThreads::Mutex _neighboursMutex;
Neighbours _neighbours;
};
class OSGTERRAIN_EXPORT TerrainTechnique : public osg::Object, public osg::Observer
{
public:
TerrainTechnique();
/** Copy constructor using CopyOp to manage deep vs shallow copy.*/
TerrainTechnique(const TerrainTechnique&,const osg::CopyOp& copyop=osg::CopyOp::SHALLOW_COPY);
META_Object(osgTerrain, TerrainTechnique);
TerrainTile* getTerrainTile() { return _terrainTile; }
const TerrainTile* getTerrainTile() const { return _terrainTile; }
virtual void init(int dirtyMask, bool assumeMultiThreaded);
virtual void update(osgUtil::UpdateVisitor* nv);
virtual void cull(osgUtil::CullVisitor* nv);
/** Clean scene graph from any terrain technique specific nodes.*/
virtual void cleanSceneGraph();
/** Traverse the terrain subgraph.*/
virtual void traverse(osg::NodeVisitor& nv);
/** 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 {}
void addNeighbour(TerrainTile* tile) { _neighbours.addNeighbour(tile); }
void removeNeighbour(TerrainTile* tile) { _neighbours.removeNeighbour(tile); }
bool containsNeighbour(TerrainTile* tile) { return _neighbours.containsNeighbour(tile); }
protected:
virtual ~TerrainTechnique();
void setTerrainTile(TerrainTile* tile);
void setDirty(bool dirty);
friend class osgTerrain::TerrainTile;
TerrainTile* _terrainTile;
TerrainNeighbours _neighbours;
};
}
#endif
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