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

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

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#include "stdneb.h"
#include "particleSphereSurfaceEmitter.h"
#include "particles/particleemitter.h"
#include "particles/particlesystem.h"
#include "particles/particle.h"

namespace Particles
{
	using namespace Math;

	__ImplementClass(Particles::SphereSurfaceEmitter, Particles::CPFCC::EMITTER_SPHERESURFACE, Particles::ParticleEmitter);

	const Math::scalar SphereSurfaceEmitter::DEFAULT_RADIUS = 10.0f;

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

		mRadiusCurve.SetScalar(10.0f);
		mHemCurve.SetScalar(0.0f);
		mSliceCurve.SetScalar(0.0f);
	};

	//-----------------------------------------------------------------------
	void SphereSurfaceEmitter::_initParticlePosition(Particle* particle)
	{
		float fkfRadius = mRadiusCurve.Calculate(mPersent);
		float tRadius = fkfRadius;

		float fkfHem = mHemCurve.Calculate(mPersent);
		float tHemZ = Math::n_deg2rad(fkfHem);
		float randomHemi = Math::n_rand( tHemZ,  N_PI);

		float fkfSlice = mSliceCurve.Calculate(mPersent);
		float tSliceY = Math::n_deg2rad( fkfSlice);

		/// hemi
		float rotzY = -Math::n_cos(randomHemi);
		float rotzX = -1.0f * Math::n_sin(randomHemi);
		Math::float3 xyPos(rotzX, rotzY, 0.0f);

		tSliceY = Math::n_rand( tSliceY,  N_PI_DOUBLE);

		Math::quaternion  quat = Math::quaternion::rotationaxis(Math::vector(0,1.0f,0), tSliceY);
		Math::float3 tPos = quat * xyPos;
		tPos.normalise();

		if ( mInitFromType == EFT_SHELL)
		{
			particle->mPosition = tPos * tRadius;
		}
		else if ( mInitFromType == EFT_BODY)
		{

			float oldRadius = tRadius;
			tRadius = tRadius * fabs(rotzX);

			Math::float2 normalizeXZ = Math::float2(tPos.x(), tPos.z());
			normalizeXZ = Math::float2::normalize(normalizeXZ);
			float random = Math::n_rand(0, tRadius);
			particle->mPosition = Math::float3(normalizeXZ.x()*random, tPos.y() * oldRadius, normalizeXZ.y()*random) ;
		}
		if(mParentSystem->IsMoveWorldCoord())
		{
			particle->mPosition += mParentSystem->GetDerivedPosition();
		}
		particle->mOrbitPositions.Clear();
	}
	//-----------------------------------------------------------------------
	void SphereSurfaceEmitter::_initParticleVelocity(Particle* particle)
	{
		if(!IsNormalDir() || EFT_BODY == mInitFromType)
		{
			Super::_initParticleVelocity(particle);
			return;
		}
		Math::float3 randomxyz = particle->mPosition;
		if(mParentSystem->IsMoveWorldCoord())
		{
			randomxyz -= mParentSystem->GetDerivedPosition();
			randomxyz = randomxyz.transformVector(Math::matrix44::inverse(mParentSystem->GetWorldMatrix()));
		}
		randomxyz.normalise();
		particle->mDirection = randomxyz * mNormalSpeed;
		if  (mParentSystem->IsMoveWorldCoord())
		{
			particle->mDirection = particle->mDirection.transformVector(mParentSystem->GetWorldMatrix());
		}
	}
	//--------------------------------------------------------------------------------
	Math::MinMaxCurve* SphereSurfaceEmitter::getMinMaxCurve(ParticleCurveType pct)
	{
		switch(pct)
		{
		case 	Emitter_SphereRadius:
			return &mRadiusCurve;
		case	Emitter_SphereHem:
			return &mHemCurve;
		case	Emitter_SphereSlice:
			return &mSliceCurve;

		default:
			return 	Super::getMinMaxCurve(pct);	
		}
	}
	//---------------------------------------------------------------------------------
	void SphereSurfaceEmitter::_switchParticleType(bool _isMobile)
	{
		Super::_switchParticleType(_isMobile);
		if(!_isMobile)
			return;
		_curveToConst(mRadiusCurve);
		_curveToConst(mHemCurve);
		_curveToConst(mSliceCurve);
	}
	////-----------------------------------------------------------------------
	Math::scalar SphereSurfaceEmitter::GetRadius(void)
	{
		double time = mParentSystem->GetCurEmitTime();
		return mRadiusCurve.Calculate((float)time);
	}
	//-----------------------------------------------------------------------
	void SphereSurfaceEmitter::SetRadius(Math::scalar radius)
	{
		if(Math::MinMaxCurve::Scalar == mRadiusCurve.GetCurveState())
		{
			mRadiusCurve.SetScalar(radius);
		}
	}
	////-----------------------------------------------------------------------
	Math::scalar SphereSurfaceEmitter::GetSphereHem()
	{
		double time = mParentSystem->GetCurEmitTime();
		return mHemCurve.Calculate((float)time);
	}
	//-----------------------------------------------------------------------
	Math::scalar SphereSurfaceEmitter::GetSphereSlice()
	{
		double time = mParentSystem->GetCurEmitTime();
		return mSliceCurve.Calculate((float)time);
	}

}