/home/cube/sources/osgearth/src/osgEarthDrivers/engine_osgterrain/CustomTerrainTechnique

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/* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2008-2010 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

#ifndef OSGEARTH_ENGINE_OSGTERRAIN_EXTENDED_TERRAIN_TECHNIQUE
#define OSGEARTH_ENGINE_OSGTERRAIN_EXTENDED_TERRAIN_TECHNIQUE 1

#include "Common"
#include <osg/CopyOp>
#include <osg/NodeVisitor>
#include <osgEarth/Progress>

using namespace osgEarth;

class Tile;
class TileUpdate;

class TerrainTechnique : public osg::Object
{
public:
    virtual void init() =0;

    virtual void traverse( osg::NodeVisitor& nv ) =0;

    virtual void releaseGLObjects( osg::State* state ) const =0;

protected:
    TerrainTechnique() : _tile(0L) { }

    TerrainTechnique( const TerrainTechnique& rhs, const osg::CopyOp& op ) : _tile(0L) { }

    Tile* _tile;

    friend class Tile;
};

class CustomTerrainTechnique : public TerrainTechnique
{
public:
    virtual void compile( const TileUpdate& updateSpec, ProgressCallback* progress ) =0;

    virtual bool applyTileUpdates() =0;

    virtual void setParentTile( class Tile* tile ) =0;

    virtual void setOptimizeTriangleOrientation( bool optimizeTriangleOrientation ) =0;

    virtual bool getOptimizeTriangleOrientation() const =0;


protected:
    CustomTerrainTechnique() { }

    CustomTerrainTechnique( const CustomTerrainTechnique& rhs, const osg::CopyOp& op )
        : TerrainTechnique( rhs, op ) { }
};

#endif // OSGEARTH_ENGINE_OSGTERRAIN_EXTENDED_TERRAIN_TECHNIQUE