source: experimental/TerrainTest/myTileLoadedCallback.h

#pragma once
#include <osgTerrain/TerrainTile>


namespace osgTerrain {

template <class T>
class  GeometryTechniquePrototypeWorkaroundTLC : public TerrainTile::TileLoadedCallback
{
public:
        //! Constructor: Nothing to do.
        GeometryTechniquePrototypeWorkaroundTLC() {};

        //! Destructor: Nothing to do.
        virtual ~GeometryTechniquePrototypeWorkaroundTLC() {};

        /**
         * \brief This function must be implemented. 
         * 
         * @return : Extrnal layer loading status.
         */ 
        virtual bool deferExternalLayerLoading() const {return true;}

        /**
         * \brief This function is performed after every tile loading.
         * 
         * It is used to install a custom geometryTechnique on every tile, because VPB databases older VPB 0.10 have a hardcoded geometryTechnique which ignores the GeometryTechniquePrototype of osgTerrain.
         * 
         * @param tile : Loaded tile.
         * @param options : Reader writer options. Defined in the base class, but here not used.
         */ 
        virtual void loaded(osgTerrain::TerrainTile* tile, const osgDB::ReaderWriter::Options* options) const {tile->setTerrainTechnique( new T() );}; 
};

}       // Namespace end.