PointOnMapTerrainHeightComponent.h

#pragma once

#include "PointOnMapComponent.h"
#include "Helpers.h"
#include "Terrain.h"
#include "VectorMath.h"
#include "Space.h"
#include "Streaming.h"
#include "ICallback.h"

namespace Eegeo
{
    namespace Positioning
    {
        class PointOnMapTerrainHeightComponent : public PointOnMapComponent
        {
        public:
           
            PointOnMapTerrainHeightComponent(Helpers::IMortonKeyBasedEventProvider<TerrainHeightResourceChangedEvent>& terrainHeightResourceChangedEventProvider,
                                              const Resources::Terrain::Heights::TerrainHeightProvider& terrainHeightProvider);
            
            virtual ~PointOnMapTerrainHeightComponent();
            
            virtual void NotifyNeedsRefresh(const IPointOnMap& pointOnMap);
            
            virtual float GetTerrainHeight() const;
            
        private:
        
            void SetLocation(const Space::LatLong& location);
            
            void OnTerrainHeightChanged(const Streaming::MortonKey& key);

            
            bool NeedsUpdate() const;
            
            void UpdateTerrainHeight();
            
            Helpers::IMortonKeyBasedEventProvider<TerrainHeightResourceChangedEvent>& m_terrainHeightResourceChangedEventProvider;
            const Resources::Terrain::Heights::TerrainHeightProvider& m_terrainHeightProvider;
            
            Helpers::TCallback1<PointOnMapTerrainHeightComponent, const Streaming::MortonKey> m_terrainHeightChangedHandler;
            
            dv3 m_locationSeaLevel;
            int m_mostDetailedTerrainLevel;
            float m_terrainHeight;
        };
    }
}