#pragma once

//disable inheritance warning caused by multiple inheritance
#if _WIN32
#if _MSC_VER
#pragma warning(disable: 4250)
#endif
#endif

#include "DistanceCubeMapRenderTechnique.h"
#include "OgreRenderTechnique.h"
#include "Ogre.h"

using namespace Ogre;

/**
	@brief DistanceCubeMapRenderTechnique used in an Ogre environment.
*/
class OgreDistanceCubeMapRenderTechnique :	public DistanceCubeMapRenderTechnique,
									public OgreRenderTechnique
{
public:

	/**
		@brief Constructor.

		@param startFrame				adds an offset to the current frame number to help evenly distribute updates between frames
		@param cubeMapUpdateInterval	update frequency
		@param cubeMapResolution		distance cubemap resolution
		@param texID					the id of the texture unit state the resulting cubemap should be bound to
		@param useDistCalc				flag to skip cube face update if object is far away
		@param useFaceAngleCalc			flag to skip cube face update if face is neglible
		@param distTolerance			distance tolerance used in face skip
		@param angleTolerance			angle tolerance used in face skip
		@param updateAllFace			defines if all cubemap faces should be updated in a frame or only one face per frame		
		@param pass						the pass to operate on			
		@param parentRenderable			the object to operate on
		@param parentTechniqueGroup		the TechniqueGroup this RenderedTechnique is attached to
	*/
	OgreDistanceCubeMapRenderTechnique( unsigned long startFrame,
							unsigned long cubeMapUpdateInterval,
							unsigned int cubeMapResolution,												
							unsigned char texID,
							bool useDistCalc,
							bool useFaceAngleCalc,
							float distTolerance,
							float angleTolerance,
							bool updateAllFace,
							Pass* pass,
							OgreRenderable* parentRenderable,
							OgreTechniqueGroup* parentTechniqueGroup
							);
	/**
		@brief Destructor.
	*/
	~OgreDistanceCubeMapRenderTechnique();
	
	//inherited
	void update(unsigned long frameNum);
	
protected:	
	/**
		@brief the id of the texture unit state the resulting cubemap should be bound to
	*/
	unsigned char texID;
	
	//inherited
	void distanceCubeMapRunChanged(RenderingRun* run);
	//inherited
	RenderingRun* createDistanceCubeMapRun();
	//inherited
	void distanceCubeMapRunUpdated(RenderingRun* run);

	
};


class OgreDistanceCubeMapRenderTechniqueFactory : public RenderTechniqueFactory
{
public:
	
	OgreDistanceCubeMapRenderTechniqueFactory();

	OgreRenderTechnique* createInstance(IllumTechniqueParams* params,
										Pass* pass,
										OgreRenderable* parentRenderable,
										OgreTechniqueGroup* parentTechniqueGroup);


	unsigned long startFrame;
	unsigned long cubeMapUpdateInterval;
	unsigned int cubeMapResolution;												
	unsigned char texID;
	bool useDistCalc;
	bool useFaceAngleCalc;
	float distTolerance;
	float angleTolerance;
	bool updateAllFace;

};