#pragma once

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

#include "OgreRenderingRun.h"
#include "LightVolumeRenderingRun.h"
#include "OgreSharedRuns.h"


/**
	@brief LightVolumeRenderingRun used in an OGRE environment.
*/
class OgreLightVolumeRenderingRun : public OgreRenderingRun,
									public LightVolumeRenderingRun
{	
public:

	/**
		@brief Constructor.

		@param sharedRuns			a pointer to the OgreSharedRuns this run belongs to
		@param name					the name of the light volume texture to be created
		@param startFrame			adds an offset to the current frame number to help evenly distribute updates between frames
		@param updateInterval		update frequency
		@param resolution			light volume texture resolution
		@param materialName			the name of the material should be used when rendering the light volume
	*/	
	OgreLightVolumeRenderingRun(OgreSharedRuns* sharedRuns,
								String name,
								unsigned long startFrame,
								unsigned long updateInterval,
								unsigned int resolution,
								unsigned int textureDepth,
								String materialName);
	/**
		@brief returns the name of the resulting light volume texture
	*/
	String getLightVolumeTextureName()
	{
		if(textureDepth == 1)
			return lightVolumeTexture2->getName();
		else
			return lightVolumeTexture3D->getName();
	}
	/**
		@brief Refreshes light camera matrices, called in each update.
	*/
	void refreshLight();
	/**
		@brief Returns the light matrix used while rendering the light volume.
	*/
	Matrix4 getLightViewProjectionMatrix()
	{
		Matrix4 m = lightVolumeCamera->getProjectionMatrixWithRSDepth() * lightVolumeCamera->getViewMatrix();
		Vector4 unitX(1,0,0,1);
		Vector4 unitY(0,1,0,1);
		Vector4 unitZ(0,0,1,1);
		Vector4 tX = m * unitX;
		Vector4 tY = m * unitY;
		Vector4 tZ = m * unitZ;
		return  m;
				
	}
	
protected:	
	/**
		@brief the name of the material should be used when rendering the light volume
	*/
	String materialName;
	/**
		@brief pointer to the nearest light source to the particle system
	*/
	Light* light;
	/**
		@brief pointer to the camera used while rendering the light volume
	*/
	Camera* lightVolumeCamera;
	/**
		@brief a pointer to the OgreSharedRuns this run belongs to
	*/
	OgreSharedRuns* sharedRuns;
	/**
		@brief the name of the light volume texture that was created by this run
	*/
	String name;
	
	Texture* lightVolumeTexture;
	Texture* lightVolumeTexture2;
	Texture* lightVolumeTextureThis;
	Texture* lightVolumeTextureLast;
	
	Texture* lightVolumeTexture3D;

	unsigned char* volumeBuffer;
	/**
		@brief the radius of the particle system
	*/
	float systemRadius;	
	void createVolumeBuffer();
	
	//inherited
	void updateFrame(unsigned long frameNum);	
	//inherited
	inline void createLightVolumeMap();

};