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

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****************************************************************************/
#ifndef __PARTICLE_FOLLOWER_AFFECTOR_H__
#define __PARTICLE_FOLLOWER_AFFECTOR_H__
#include "particles/particle_fwd_decl.h"
#include "particles/particleaffector.h"

namespace Particles
{
	class ParticleFollowerAffector: public ParticleAffector
	{
		__DeclareSubClass( ParticleFollowerAffector, ParticleAffector);

	public:
		// Constants
		static const Math::scalar DEFAULT_MAX_DISTANCE;
		static const Math::scalar DEFAULT_MIN_DISTANCE;

	public:

		ParticleFollowerAffector();
		virtual ~ParticleFollowerAffector(){};

		Math::scalar GetMaxDistance(void) const;
		void SetMaxDistance(Math::scalar maxDistance);

		Math::scalar GetMinDistance(void) const;
		void SetMinDistance(Math::scalar minDistance);

		virtual void _affect(Particle* particle);

		virtual void _firstParticle( Particle* particle ); 
	protected:
		Math::scalar mMinDistance;
		Math::scalar mMaxDistance;
		Math::float3 mPositionPreviousParticle;
		bool mFirst;


	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 ParticleAffectorPtr& affector );

	};
	//-----------------------------------------------------------------------
	inline Math::scalar ParticleFollowerAffector::GetMaxDistance(void) const
	{
		return mMaxDistance;
	}
	//-----------------------------------------------------------------------
	inline void ParticleFollowerAffector::SetMaxDistance(Math::scalar maxDistance)
	{
		mMaxDistance = maxDistance;
	}
	//-----------------------------------------------------------------------
	inline Math::scalar ParticleFollowerAffector::GetMinDistance(void) const
	{
		return mMinDistance;
	}
	//-----------------------------------------------------------------------
	inline void ParticleFollowerAffector::SetMinDistance(Math::scalar minDistance)
	{
		mMinDistance = minDistance;
	}

}
#endif