genesis-3d_engine/Engine/addons/particles/affectors/particleScaleAffector.cc

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

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#include "stdneb.h"
#include "particleScaleAffector.h"
#include "particles/particleaffector.h"
#include "particles/particlesystem.h"
#include "particles/particle.h"

namespace Particles
{
	using namespace Math;

	__ImplementClass(Particles::ScaleAffector, CPFCC::AFFECTOR_SCALE, Particles::ParticleAffector);

	//-----------------------------------------------------------------------
	ScaleAffector::ScaleAffector(void) : ParticleAffector()
		, mIsAxialScale(false)
	{

		mScaleX.SetScalar(1.0f);
		mScaleY.SetScalar(1.0f);
		mScaleZ.SetScalar(1.0f);

		mName = "ScaleAffector";
	}

	//-----------------------------------------------------------------------
	void ScaleAffector::_affect(Particle* particle)
	{
		if( !GetEnable())
			return;
		float percent = (particle->mTotalTimeToLive - particle->mTimeToLive)/particle->mTotalTimeToLive;

		Math::float3 particleSize(mScaleX.Calculate(percent,particle->mRandom0),
			mScaleY.Calculate(percent,particle->mRandom1),
			mScaleZ.Calculate(percent,particle->mRandom2) );


		if(!mIsAxialScale)
		{
			particleSize.y() = particleSize.x();
			particleSize.z() = particleSize.x();
		}
		particle->mSize = particle->mInitSize * particleSize;

	}
	//-------------------------------------------------------------------------------
	void ScaleAffector::SetShaderParam()
	{
		Graphic::GlobalMaterialParam* pGMP = Graphic::Material::GetGlobalMaterialParams();
		Math::float4 _shaderPar = pGMP->GetVectorParam(Graphic::eGShaderParticleForce);
		_shaderPar.w() = mShaderParam;
		pGMP->SetVectorParam(Graphic::eGShaderParticleForce,_shaderPar);
	}
	void ScaleAffector::InitShaderParam()
	{
		mShaderParam = mScaleX.Calculate(0,Math::n_rand(0,1));
	}
	//--------------------------------------------------------------------------------
	void ScaleAffector::SetShaderMask(const GPtr<ShaderProgramCompiler::ShaderMarcro>& pMarcro)
	{
		if(!GetEnable())
			return;
		pMarcro->TurnOn(ShaderProgramCompiler::ShaderMarcro::m_sParticleScale);
	}
	//--------------------------------------------------------------------------------
	Math::MinMaxCurve* ScaleAffector::getMinMaxCurve(ParticleCurveType pct)
	{
		switch(pct)
		{
		case 	Affector_ScaleX:
			return &mScaleX;
		case	Affector_ScaleY:
			return &mScaleY;
		case	Affector_ScaleZ:
			return &mScaleZ;

		default:
			return Super::getMinMaxCurve(pct);					
		}
	}
	//---------------------------------------------------------------------------------
	void ScaleAffector::_switchParticleType(bool _isMobile)
	{
		if(!_isMobile)
		{
			Util::Array<Math::float2> _list;
			Util::Array<bool> _type;
			_type.Append(true);
			_type.Append(true);
			Math::MinMaxCurve* curve = mParentSystem->GetEmitter()->getMinMaxCurve(Emitter_SizeX);
			_list.Append(Math::float2(0,curve->Calculate(0)));
			_list.Append(Math::float2(1,mScaleX.Calculate(0)));
			mScaleX.SetCurveFromArray(_list,_type,_list,_type);
			mScaleY.SetCurveFromArray(_list,_type,_list,_type);
			mScaleZ.SetCurveFromArray(_list,_type,_list,_type);
			return;
		}
		Math::MinMaxCurve* curve = mParentSystem->GetEmitter()->getMinMaxCurve(Emitter_SizeX);
		curve->SetCurveState(MinMaxCurve::Scalar);
		curve->SetScalar(mScaleX.Calculate(0));
		float size = mScaleX.Calculate(1);
		mScaleX.SetCurveState(MinMaxCurve::Scalar);
		mScaleX.SetScalar(size);
	}
}