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#include "UnityPrefix.h"
#include "SizeByVelocityModule.h"
#include "Runtime/BaseClasses/ObjectDefines.h"
#include "Runtime/Serialize/TransferFunctions/SerializeTransfer.h"
#include "Runtime/Graphics/ParticleSystem/ParticleSystemUtils.h"
SizeBySpeedModule::SizeBySpeedModule () : ParticleSystemModule(false)
, m_Range (0.0f, 1.0f)
{}
template<ParticleSystemCurveEvalMode mode>
void UpdateTpl(const MinMaxCurve& curve, const ParticleSystemParticles& ps, float* tempSize, size_t fromIndex, size_t toIndex, const Vector2f offsetScale)
{
for (size_t q = fromIndex; q < toIndex; ++q)
{
const Vector3f vel = ps.velocity[q] + ps.animatedVelocity[q];
const float t = InverseLerpFast01 (offsetScale, Magnitude (vel));
const float random = GenerateRandom(ps.randomSeed[q] + kParticleSystemSizeBySpeedCurveId);
tempSize[q] *= max<float> (0.0f, Evaluate<mode> (curve, t, random));
}
}
void SizeBySpeedModule::Update (const ParticleSystemParticles& ps, float* tempSize, size_t fromIndex, size_t toIndex)
{
DebugAssert(toIndex <= ps.array_size ());
Vector2f offsetScale = CalculateInverseLerpOffsetScale(m_Range);
if (m_Curve.minMaxState == kMMCScalar)
UpdateTpl<kEMScalar> (m_Curve, ps, tempSize, fromIndex, toIndex, offsetScale);
else if (m_Curve.IsOptimized() && m_Curve.UsesMinMax())
UpdateTpl<kEMOptimizedMinMax> (m_Curve, ps, tempSize, fromIndex, toIndex, offsetScale);
else if(m_Curve.IsOptimized())
UpdateTpl<kEMOptimized> (m_Curve, ps, tempSize, fromIndex, toIndex, offsetScale);
else
UpdateTpl<kEMSlow> (m_Curve, ps, tempSize, fromIndex, toIndex, offsetScale);
}
void SizeBySpeedModule::CheckConsistency ()
{
const float MyEpsilon = 0.001f;
m_Range.x = std::min (m_Range.x, m_Range.y - MyEpsilon);
}
template<class TransferFunction>
void SizeBySpeedModule::Transfer (TransferFunction& transfer)
{
ParticleSystemModule::Transfer (transfer);
transfer.Transfer (m_Curve, "curve");
transfer.Transfer (m_Range, "range");
}
INSTANTIATE_TEMPLATE_TRANSFER(SizeBySpeedModule)
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