#pragma once
#include "ParticleSystem.h"
#include "Texture.h"
#include "Impostor.h"
#include <RttRes/RenderTexture.h>
#include <MyCgRes/CgProgram.h>
#include "Scene.h"

class AdvancedParticleSystem
{
public:
	AdvancedParticleSystem(void);
	~AdvancedParticleSystem(void);

private:
	//Impostor to display
	Impostor m_DisplayImpostor;
	//Impostor for illuminatoin calculation
	Impostor m_IllumImpostor;

	//Display Rendertexture
	RenderTexture m_DisplayTexture;
	//Illumination textures
	RenderTexture m_IllumTexture; //4 textures will be rendered in the 4 AUX buffers using MRT
	//Depth Texture for appropriate density blending
	RenderTexture m_FrontDepthTexture;
	RenderTexture m_BackDepthTexture;
	RenderTexture m_ObjectsTexture;
	RenderTexture m_ScatteredIlumTexture;

	
	CgProgram m_IllumProgram;
	CgProgram m_FrontDepthProgram;
	CgProgram m_DensityOnlyProgram;
	CgProgram m_DisplayProgram;
	CgProgram m_Psys_Depth_Multiple_Forward_Program;
	CgProgram m_TempProg;CgProgram m_TempProg2;
	CgProgram m_ObjDepthProg;
	CgProgram m_ScatterIllumProgram;
	CgProgram m_Psys_Multiple_Forward_Program;
	CgProgram m_Psys_Single_Phase_Program;
	CgProgram m_Psys_Depth_Single_Phase_Program;
	CgProgram m_Psys_Depth_Default_Program;
	CgProgram m_Psys_Default_Program;
	
	Camera m_LightCamera;

	
public:
	Scene* theScene;
	bool object_shadows;
	bool depthcalc;
	int m_PSys_RenderMode;
	float albedo;
	float symmetry;float symmetry2;
	float transparency;
	unsigned int PhaseTexID;
	unsigned int AngleTexID;
	Vector m_LightColor;

	ParticleSystem m_ParticleSystem;
	ParticleSystem m_LittleParticleSystem;

//Billboard display texture
	Texture m_BillboardTexture;
	Texture m_BbBackDepthTexture;
	Texture m_BbFrontDepthTexture;

	void Display(Camera* cam,Vector LightPos);
	void Refresh(Camera* cam,Vector LightPos,unsigned int Dt,unsigned int TimefromSecond);

	void RefreshDepths(Camera* cam);
	void RefreshDepthswithSpheres(Camera* cam);
	void Initialize();
	void InitSystems();
	void RenderObjectDepths(Camera* cam);

	void displayillum(Camera* cam);
	void displayLittle(Camera* cam);

	void RefreshIllumTextures(Vector LightPos);

	void DecreaseAlbedo(){albedo-=0.05;if(albedo<0)albedo=0;}
	void IncreaseAlbedo(){albedo+=0.05;if(albedo>1)albedo=1;}
	void DecreaseTransparency(){transparency-=0.05;if(transparency<0)transparency=0;}
	void IncreaseTransparency(){transparency+=0.05;if(transparency>1)transparency=1;}
	void DecreaseSymmetry(){symmetry-=0.05;if(symmetry<-1)symmetry=-1;}
	void IncreaseSymmetry(){symmetry+=0.05;if(symmetry>1)symmetry=1;}
};