#pragma once

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

#include "ConvolvedCubeMapRenderTechnique.h"
#include "OgreRenderTechnique.h"
#include "Ogre.h"

using namespace Ogre;

/**
	@brief ConvolvedCubeMapRenderTechnique used in an Ogre environment.
*/
class OgreConvolvedCubeMapRenderTechnique :	public ConvolvedCubeMapRenderTechnique,
									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			color cubemap resolution
		@param reducedCubeMapResolution		reduced sized color cubemap resolution
		@param reducedTexID					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
	*/
	OgreConvolvedCubeMapRenderTechnique( unsigned long startFrame,
							unsigned long cubeMapUpdateInterval,
							unsigned int cubeMapResolution,
							unsigned int reducedCubeMapResolution,
							unsigned char reducedTexID,
							bool useDistCalc,
							bool useFaceAngleCalc,
							float distTolerance,
							float angleTolerance,
							bool updateAllFace,
							Pass* pass,
							OgreRenderable* parentRenderable,
							OgreTechniqueGroup* parentTechniqueGroup
							);
	/**
		@brief Destructor.
	*/
	~OgreConvolvedCubeMapRenderTechnique();
	
	//inherited
	void update(unsigned long frameNum);
	
protected:	
	/**
		@brief the id of the texture unit state the resulting cubemap should be bound to
	*/
	unsigned char reducedTexID;
	
	//inherited
	void reducedCubeMapRunChanged(RenderingRun* run);
	//inherited
	void colorCubeMapRunChanged(RenderingRun* run);
	//inherited
	RenderingRun* createColorCubeMapRun();
	//inherited
	RenderingRun* createReducedCubeMapRun();
	
};



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

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


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

};