genesis-3d_engine/Engine/addons/particles/particletarget.h

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

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****************************************************************************/
#ifndef __particletarget_H__
#define __particletarget_H__


#include "particles/particle_fwd_decl.h"
#include "rendersystem/base/PrimitiveGroup.h"
#include "foundation/util/scriptbind.h"
#include "particles/particle.h"
#include "graphicsystem/GraphicSystem.h"
#include "graphicsystem/base/GraphicBufferData.h"

namespace Particles
{
	struct UVRect
	{
		UVRect() : x(0.0f), y(0.0f), width(0.0f), height(0.0f){
		}

		Math::scalar x; 
		Math::scalar y; 
		Math::scalar width;
		Math::scalar height; 
	};


	class ParticleTarget: public Core::RefCounted, Serialization::ISerialize
	{
		__DeclareClass( ParticleTarget )
			__ScriptBind

	public:
		//--------------------------------------------------------------------------------
		enum OrientType
		{
			OT_NONE = 0,
			OT_DIRECT = 1,

		};

		//------------------------------------------------------------------------
		class Beam_Camera_OP
		{
		public:
			void operator()( 	
				Particle* particle, 
				const Math::float3& derivedPos,
				const Math::float3& lastDerivedPos,
				IndexT index,
				ParticleVertexData* particleVertex, 
				ushort* indicies) const
			{

				Math::float3 eyedir = cameraPos - derivedPos;
				eyedir.normalise();
				Math::float3 diffdir = derivedPos - lastDerivedPos;
				diffdir.normalise();

				Math::float3 rightVector =  eyedir.crossProduct( diffdir );
				rightVector.normalise();

				rightVector *= parentScale;

				Math::float3 right = rightVector * particle->mSize.x() * 0.5;

				particleVertex[0].mNormal = eyedir;

				particleVertex[1].mPosition = derivedPos - right;
				particleVertex[1].mNormal = eyedir;

				particleVertex[2].mPosition = derivedPos + right;
				particleVertex[2].mNormal = eyedir;

				particleVertex[3].mNormal = eyedir;


				if (index > 1)		
				{
					ParticleVertexData* lastVertexIndex = particleVertex-4; 
					particleVertex[0].mPosition = lastVertexIndex[1].mPosition;
					particleVertex[3].mPosition = lastVertexIndex[2].mPosition;
				}
				else
				{
					particleVertex[0].mPosition = lastDerivedPos  - right;
					particleVertex[3].mPosition = lastDerivedPos  + right;
				}

			}		
			Math::float3 cameraPos;
			Math::float3  parentScale;
		};	
		//------------------------------------------------------------------------
		//------------------------------------------------------------------------
		class Trail_OP
		{
		public:
			void operator()( 	
				Particle* particle, 
				const Math::float3& derivedPos,
				const Math::float3& lastDerivedPos,
				IndexT index,
				ParticleVertexData* particleVertex, 
				float amplate,
				float waveLength) const
			{

				Math::float3 diffdir = derivedPos - lastDerivedPos ;
				diffdir.normalise();

				Math::float3 rightVector =  sysytemUp.crossProduct( diffdir );
				rightVector.normalise();

				rightVector *= parentScale;
				Math::float3 right = rightVector * particle->mSize.x() * 0.5;

				particleVertex[0].mNormal = sysytemUp;

				particleVertex[1].mPosition = derivedPos - right;
				particleVertex[1].mNormal = sysytemUp;

				particleVertex[2].mPosition = derivedPos  + right;
				particleVertex[2].mNormal = sysytemUp;


				particleVertex[3].mNormal = sysytemUp;

				Math::scalar x = 6.28f * index /  waveLength;
				Math::scalar upWave = amplate * x * Math::n_sin(x);
				particleVertex[1].mPosition += sysytemUp*upWave;
				particleVertex[2].mPosition += sysytemUp*upWave;

				if (index > 1)		
				{
					ParticleVertexData* lastVertexIndex = particleVertex-4; 
					particleVertex[0].mPosition = lastVertexIndex[1].mPosition;
					particleVertex[3].mPosition = lastVertexIndex[2].mPosition;
				}
				else
				{
					particleVertex[0].mPosition = lastDerivedPos - right;
					particleVertex[3].mPosition = lastDerivedPos + right;
				}

			}		
			Math::float3 sysytemUp;
			Math::float3  parentScale;
		};	
		//------------------------------------------------------------------------
		class Camera_OP
		{
		public:
			void operator()( 	
				Particle* particle, 
				const Math::float3& derivedPos,
				const Math::float3& lastDerivedPos,
				ParticleVertexData* particleVertex, 
				ushort* indicies) const
			{

				Math::float3 dir = cameraPos - derivedPos ;
				dir.normalise();	

				Math::float3 upVec;				
				Math::scalar stretch;
				if ( ot == OT_DIRECT)
				{
					upVec = derivedPos-lastDerivedPos;
					stretch = upStretch;
				}
				else
				{
					upVec = upVector;
					stretch = 1.0f;
				}

				upVec.normalise();
				Math::float3 rightVector =upVec.crossProduct( dir );
				rightVector.normalise();

				upVec = upVec * parentScale;
				rightVector = rightVector * parentScale;

				Math::float3 up    =  upVec * particle->mSize.y() * 0.5 * stretch;
				Math::float3 right = rightVector * particle->mSize.x() * 0.5;

				particleVertex[0].mPosition = derivedPos + up - right;
				particleVertex[0].mNormal = dir;

				particleVertex[1].mPosition = derivedPos - up - right;
				particleVertex[1].mNormal = dir;

				particleVertex[2].mPosition = derivedPos - up + right;
				particleVertex[2].mNormal = dir;

				particleVertex[3].mPosition = derivedPos + up + right;
				particleVertex[3].mNormal = dir;
			}
			OrientType   ot;
			Math::scalar	upStretch;
			Math::float3 upVector;
			Math::float3 cameraPos;
			Math::float3 parentScale;
		};
		//--------------------------------------------------------------------------------
		class BillBoard_XZ_OP
		{
		public:
			void operator()( 	
				Particle* particle, 
				const Math::float3& derivedPos,
				const Math::float3& lastDerivedPos,
				ParticleVertexData* particleVertex, 
				ushort* indicies) const
			{

				Math::float3 xOff(1.0, 0.0, 0.0);
				Math::float3 zOff(0.0, 0.0, 1.0);

				if ( ot == OT_DIRECT)
				{
					Math::float3 dir = derivedPos-lastDerivedPos;

					if (dir.length() > 0.00001F)
					{
						dir.y() = 0.0;
						dir.normalise();
						xOff = dir;
						zOff.x() = -xOff.z();
						zOff.z() = xOff.x();
					}
				}

				xOff *= ( particle->mSize.x() * 0.5f );
				zOff *= ( particle->mSize.y() * 0.5f );

				particleVertex[0].mPosition = derivedPos - xOff + zOff;
				particleVertex[0].mNormal.set(0.0, -1.0, 0.0);

				particleVertex[1].mPosition = derivedPos - xOff - zOff;
				particleVertex[1].mNormal.set(0.0, -1.0, 0.0);

				particleVertex[2].mPosition = derivedPos + xOff - zOff;
				particleVertex[2].mNormal.set(0.0, -1.0, 0.0);

				particleVertex[3].mPosition = derivedPos + xOff + zOff;
				particleVertex[3].mNormal.set(0.0, -1.0, 0.0);

			}

			OrientType   ot;
			Math::scalar	stretch;
			Math::quaternion  parentQuaternion;
		};
		//--------------------------------------------------------------------------------



	public:
		ParticleTarget();
		virtual ~ParticleTarget();

		ParticleSystem* GetParentSystem(void) const;
		void SetParentSystem( ParticleSystem* technique);

		void SetDirtyPrim(bool);
		bool IsDirtyPrim(void) const;

		bool IsActive(void) const;

		enum TargetType
		{
			Unknown,
			BillBoard,
			Beam,
			Box,
			Sphere,
			RibbonTrail,
			Decal,
			Trail,
			Mesh,
			HorizontalPlane,
			GPU,
		};
		virtual TargetType GetTargetType(void) const;

		void SetNeedPrimitive(bool need);

		bool GetNeedPrimitive() const;

		RenderBase::PrimitiveHandle GetPrimitiveHandle() const;

		void CheckPrimitive(SizeT vertexCount, SizeT indexCount, SizeT& verticesSizeInByte, SizeT& indicesSizeInByte);

		//---------------------Property---------------------------------------------------

		void SetName( const Util::String& name);
		const Util::String& GetName(void) const; 

		void SetTexCoordSize(SizeT row, SizeT column);
		void SetTexCoordRowSize(SizeT row);
		void SetTexcoordColumnSize(SizeT column);
		SizeT GetTexCoordRowSize(void) const;
		SizeT GetTexCoordColumnSize(void) const;

		///@
		void SetOrientType(OrientType t);
		OrientType GetOrientType(void) const;

		///
		void SetStretchScale(float _scale);
		float GetStretchScale(void) const;

		SizeT GetActiveVertexCount() const;
		SizeT GetActiveIndexCount() const;

		//-----------------------Internal Loop-------------------------------------------------

		virtual void _onActivate(void);

		virtual void _onDeactivate(void);

		virtual void _updateTarget( ParticlePoolPtr& pool, Timing::Time frameTime);

		/**
		*/
		virtual void _RotatorParticle(Particle* particle, ParticleVertexData* particleVertex);
		virtual Math::MinMaxCurve* getMinMaxCurve(ParticleCurveType pct);
		void _initVertexBufferData(Graphic::VertexBufferData2& vbd2, SizeT needCount);
		void _initSpriteGPUVertexBuffer(Graphic::VertexBufferData2& vbd2, SizeT needCount);
		void _initBoardGPUVertexBuffer(Graphic::VertexBufferData2& vbd2, SizeT needCount);
		void _initVertexBufferData(Graphic::IndexBufferData2& ibd2, SizeT needCount);
	protected:
		void restActiveElemCount();
		void generateUVFrames(void);
		const UVRect* getUVRect(IndexT texCoordIndex) const ;

		Math::bbox computerBoundingBox( ParticleVertexData* particleVertex,  SizeT numVertex ) const;

	protected:
		ParticleSystem* mParentSystem;
		bool mIsActive;

		Util::String mName;
		SizeT mActiveVertexCount;
		SizeT mActiveIndexCount;
		SizeT mCurrVertexCount;
		SizeT mCurrIndexCount;
		SizeT mTexRowSize;
		SizeT mTexColumnSize;
		Util::Array<UVRect> mUVTexCoords;	
		OrientType		mOrientType;
		float					mStretchScale;

		RenderBase::PrimitiveHandle mPrimitiveHandle;
		bool	mPrimDirty;
		bool mNeedPrimitive;


	public:
		// @ISerialization::GetVersion. when change storage, must add SerializeSVersion count
		virtual Serialization::SVersion GetVersion() const;

		// @ISerialization::Load 
		virtual void Load( Serialization::SVersion ver, Serialization::SerializeReader* pReader, const Serialization::SerializationArgs* args );

		// @ISerialization::Save
		virtual void Save( Serialization::SerializeWriter* pWriter ) const;

		// copy 
		virtual void CopyFrom( const ParticleTargetPtr& target );
	};

	//--------------------------------------------------------------------------------
	inline void ParticleTarget::SetDirtyPrim(bool bset)
	{
		mPrimDirty = bset;
	}
	//--------------------------------------------------------------------------------
	inline bool ParticleTarget::IsDirtyPrim(void) const
	{
		return mPrimDirty; 
	}
	//------------------------------------------------------------------------
	inline
		ParticleSystem* 
		ParticleTarget::GetParentSystem(void) const
	{
		return mParentSystem;
	}
	//------------------------------------------------------------------------
	inline
		void 
		ParticleTarget::SetParentSystem( ParticleSystem* technique)
	{
		mParentSystem = technique;
	}
	//------------------------------------------------------------------------
	inline
		bool 
		ParticleTarget::IsActive(void) const
	{
		return mIsActive;
	}
	//------------------------------------------------------------------------
	inline
		void 
		ParticleTarget::SetTexCoordSize(SizeT row, SizeT column)
	{
		mTexRowSize = row;
		mTexColumnSize = column;
		if ( mTexRowSize < 1 )
		{
			mTexRowSize = 1;
		}
		if ( mTexColumnSize < 1 )
		{
			mTexColumnSize = 1;
		}
		generateUVFrames();
	}
	//------------------------------------------------------------------------
	inline
		void 
		ParticleTarget::SetTexCoordRowSize(SizeT row)
	{
		mTexRowSize = row;
		if ( mTexRowSize < 1 )
		{
			mTexRowSize = 1;
		}
		generateUVFrames();
	}
	//------------------------------------------------------------------------
	inline
		void 
		ParticleTarget::SetTexcoordColumnSize(SizeT column)
	{
		mTexColumnSize = column;
		if ( mTexColumnSize < 1 )
		{
			mTexColumnSize = 1;
		}
		generateUVFrames();
	}
	//------------------------------------------------------------------------
	inline
		SizeT 
		ParticleTarget::GetTexCoordRowSize(void) const
	{
		return mTexRowSize;
	}
	//------------------------------------------------------------------------
	inline
		SizeT 
		ParticleTarget::GetTexCoordColumnSize(void) const
	{
		return mTexColumnSize;
	}	
	//------------------------------------------------------------------------
	inline
		void 
		ParticleTarget::SetName( const Util::String& name)
	{
		if ( name.IsEmpty() )
		{
			return;
		}
		mName = name;
	}
	//------------------------------------------------------------------------
	inline
		const Util::String& 
		ParticleTarget::GetName(void) const
	{
		return mName;
	}
	//------------------------------------------------------------------------
	inline
		const UVRect*
		ParticleTarget::getUVRect(IndexT texCoordIndex) const
	{
		n_assert( texCoordIndex >= 0 );
		if ( mUVTexCoords.IsEmpty() )
		{
			return NULL;
		}
		return &( mUVTexCoords[ texCoordIndex % mUVTexCoords.Size() ] );
	}
	//------------------------------------------------------------------------
	inline void ParticleTarget::SetOrientType(ParticleTarget::OrientType t)
	{
		mOrientType = t;
	}
	//-------------------------------------------------------------------------
	inline ParticleTarget::OrientType 
		ParticleTarget::GetOrientType(void) const
	{
		return mOrientType;
	}
	//--------------------------------------------------------------------------------
	inline void ParticleTarget::SetStretchScale(float _scale)
	{
		mStretchScale = _scale;
	}
	//--------------------------------------------------------------------------------
	inline float ParticleTarget::GetStretchScale(void) const
	{
		return mStretchScale;
	}

	inline void ParticleTarget::SetNeedPrimitive(bool need)
	{
		mNeedPrimitive = need;
	}

	inline bool ParticleTarget::GetNeedPrimitive() const
	{
		return mNeedPrimitive;
	}

	inline RenderBase::PrimitiveHandle ParticleTarget::GetPrimitiveHandle() const
	{
		return mPrimitiveHandle;
	}

	inline SizeT ParticleTarget::GetActiveVertexCount() const
	{
		return mActiveVertexCount;
	}

	inline SizeT ParticleTarget::GetActiveIndexCount() const
	{
		return mActiveIndexCount;
	}
}







#endif // __particletarget_H__