genesis-3d_engine/Engine/addons/particles/emitters/particleBoxEmitter.cc

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

http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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****************************************************************************/
#include "stdneb.h"
#include "particleBoxEmitter.h"
#include "particles/particleemitter.h"
#include "particles/particle.h"
#include "particles/particlesystem.h"

namespace Particles
{
	using namespace Math;

	__ImplementClass(Particles::BoxEmitter, Particles::CPFCC::EMITTER_BOX, Particles::ParticleEmitter);

	//-----------------------------------------------------------------------
	BoxEmitter::BoxEmitter():ParticleEmitter()
	{
		mMinColor = Particles::ConstDefine::DEFAULT_MAX_COLOR;
		mName = "BoxEmitter";		
		mInitFromType = EFT_SHELL;

		mCurveRangeX.SetScalar(1.0f);
		mCurveRangeY.SetScalar(1.0f);
		mCurveRangeZ.SetScalar(1.0f);

	};

	//-----------------------------------------------------------------------
	void BoxEmitter::_initParticlePosition(Particle* particle)
	{
		float fkfRangeX = mCurveRangeX.Calculate(mPersent);
		float fkfRangeY = mCurveRangeY.Calculate(mPersent);
		float fkfRangeZ = mCurveRangeZ.Calculate(mPersent);

		Math::float3 randomxyz = ConstDefine::FLOAT3_ZERO;
		if (mInitFromType == EFT_BODY)
		{
			randomxyz = Math::float3( Math::n_rand(-0.5f,0.5f) * fkfRangeX,
				Math::n_rand(-0.5f,0.5f) * fkfRangeY,
				Math::n_rand(-0.5f,0.5f) * fkfRangeZ );
		}
		else if(mInitFromType == EFT_SHELL)
		{
			randomxyz = Math::float3( Math::n_rand(-0.5f,0.5f) * fkfRangeX,
				Math::n_rand(-0.5f,0.5f) * fkfRangeY,
				Math::n_rand(-0.5f,0.5f) * fkfRangeZ);
			float randomsid = Math::n_rand(0,3);
			if(randomsid < 1.0f)
				randomxyz.x() = fkfRangeX * (Math::n_rand(-0.5f,0.5f)>0?0.5f:-0.5f);
			else if(randomsid < 2.0f)
				randomxyz.y() = fkfRangeY * (Math::n_rand(-0.5f,0.5f)>0?0.5f:-0.5f);
			else
				randomxyz.z() = fkfRangeZ * (Math::n_rand(-0.5f,0.5f)>0?0.5f:-0.5f);
		}
		if(mParentSystem->IsMoveWorldCoord())
		{
			randomxyz = randomxyz + mParentSystem->GetDerivedPosition();
		}
		particle->mPosition = randomxyz;
		particle->mOrbitPositions.Clear();
	}
	//-----------------------------------------------------------------------
	void BoxEmitter::_initParticleVelocity(Particle* particle)
	{
		if(!IsNormalDir() || EFT_BODY == mInitFromType)
		{
			Super::_initParticleVelocity(particle);
			return;
		}
		float fkfRangeX = mCurveRangeX.Calculate(mPersent)*0.5f;
		float fkfRangeY = mCurveRangeY.Calculate(mPersent)*0.5f;
		float fkfRangeZ = mCurveRangeZ.Calculate(mPersent)*0.5f;


		Math::float3 randomxyz = particle->mPosition;
		if(mParentSystem->IsMoveWorldCoord())
		{
			randomxyz -= mParentSystem->GetDerivedPosition();
			randomxyz = randomxyz.transformVector(Math::matrix44::inverse(mParentSystem->GetWorldMatrix()));
		}

		if(randomxyz.x() < -fkfRangeX + 1e-6)
		{
			particle->mDirection.x() = -mNormalSpeed;
			particle->mDirection.y() = 0;
			particle->mDirection.z() = 0;
		}
		else if(randomxyz.x() > fkfRangeX - 1e-6)
		{
			particle->mDirection.x() = mNormalSpeed;
			particle->mDirection.y() = 0;
			particle->mDirection.z() = 0;
		}
		else if(randomxyz.y() < -fkfRangeY + 1e-6)
		{
			particle->mDirection.x() = 0;
			particle->mDirection.y() = -mNormalSpeed;
			particle->mDirection.z() = 0;
		}
		else if(randomxyz.y() > fkfRangeY - 1e-6)
		{
			particle->mDirection.x() = 0;
			particle->mDirection.y() = mNormalSpeed;
			particle->mDirection.z() = 0;
		}
		else if(randomxyz.z() < -fkfRangeZ + 1e-6)
		{
			particle->mDirection.x() = 0;
			particle->mDirection.y() = 0;
			particle->mDirection.z() = -mNormalSpeed;
		}
		else
		{
			particle->mDirection.x() = 0;
			particle->mDirection.y() = 0;
			particle->mDirection.z() = mNormalSpeed;
		}
		if  (mParentSystem->IsMoveWorldCoord())
		{
			// rotate Direction
			particle->mDirection = particle->mDirection.transformVector(mParentSystem->GetWorldMatrix());
		}
	}
	//--------------------------------------------------------------------------------
	Math::MinMaxCurve* BoxEmitter::getMinMaxCurve(ParticleCurveType pct)
	{
		switch(pct)
		{
		case 	Emitter_BoxSizeX:
			return &mCurveRangeX;
		case	Emitter_BoxSizeY:
			return &mCurveRangeY;
		case	Emitter_BoxSizeZ:
			return &mCurveRangeZ;

		default:
			return 	Super::getMinMaxCurve(pct);
		}
	}
	//-----------------------------------------------------------------------
	void BoxEmitter::_switchParticleType(bool _isMobile)
	{
		Super::_switchParticleType(_isMobile);
		if(!_isMobile)
			return;
		_curveToConst(mCurveRangeX);
		_curveToConst(mCurveRangeY);
		_curveToConst(mCurveRangeZ);
	}
	//-----------------------------------------------------------------------
	Math::scalar BoxEmitter::GetXRange()
	{
		double time = mParentSystem->GetCurEmitTime();
		return mCurveRangeX.Calculate((float)time);
	}
	//-----------------------------------------------------------------------
	Math::scalar BoxEmitter::GetYRange() 
	{
		double time = mParentSystem->GetCurEmitTime();
		return mCurveRangeY.Calculate((float)time);
	}
	//-----------------------------------------------------------------------
	Math::scalar BoxEmitter::GetZRange()
	{
		double time = mParentSystem->GetCurEmitTime();
		return mCurveRangeZ.Calculate((float)time);
	}

	//-----------------------------------------------------------------------
	void BoxEmitter::SetXRange(const Math::scalar range)
	{
		if(Math::MinMaxCurve::Scalar == mCurveRangeX.GetCurveState())
		{
			mCurveRangeX.SetScalar(range);
		}
	}
	//-----------------------------------------------------------------------
	void BoxEmitter::SetYRange(const Math::scalar range)
	{
		if(Math::MinMaxCurve::Scalar == mCurveRangeY.GetCurveState())
		{
			mCurveRangeY.SetScalar(range);
		}
	}


	//-----------------------------------------------------------------------
	void BoxEmitter::SetZRange(const Math::scalar range)
	{
		if(Math::MinMaxCurve::Scalar == mCurveRangeZ.GetCurveState())
		{
			mCurveRangeZ.SetScalar(range);
		}
	}
}