//
//  RotationByVelocityModule.cpp
//  libcocos2d Mac
//
//  Created by 徐俊杰 on 2020/4/24.
//

#include "rparticle/Modules/RotationByVelocityModule.h"

//#include "UnityPrefix.h"
//#include "rparticle/Modules/RotationByVelocityModule.h"
//#include "Runtime/BaseClasses/ObjectDefines.h"
#include "rparticle/Serialize/TransferFunctions/SerializeTransfer.h"
#include "rparticle/ParticleSystemUtils.h"


NS_RRP_BEGIN

RotationBySpeedModule::RotationBySpeedModule () : ParticleSystemModule(false)
,    m_Range (0.0f, 1.0f)
{}

template<ParticleSystemCurveEvalMode mode>
void UpdateTpl(const MinMaxCurve& curve, ParticleSystemParticles& ps, size_t fromIndex, size_t toIndex, const Vector2f offsetScale)
{
    if (!ps.usesRotationalSpeed) return;
    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] + kParticleSystemRotationBySpeedCurveId);
        ps.rotationalSpeed[q] += Evaluate<mode> (curve, t, random);
    }
}

void RotationBySpeedModule::Update (const ParticleSystemReadOnlyState& roState, const ParticleSystemState& state, ParticleSystemParticles& ps, const size_t fromIndex, const size_t toIndex)
{
    Vector2f offsetScale = CalculateInverseLerpOffsetScale (m_Range * roState.GetRenderScale());
    if (m_Curve.minMaxState == kMMCScalar)
        UpdateTpl<kEMScalar>(m_Curve, ps, fromIndex, toIndex, offsetScale);
    else if(m_Curve.IsOptimized() && m_Curve.UsesMinMax())
        UpdateTpl<kEMOptimizedMinMax>(m_Curve, ps, fromIndex, toIndex, offsetScale);
    else if(m_Curve.IsOptimized())
        UpdateTpl<kEMOptimized>(m_Curve, ps, fromIndex, toIndex, offsetScale);
    else
        UpdateTpl<kEMSlow>(m_Curve, ps, fromIndex, toIndex, offsetScale);
}

void RotationBySpeedModule::CheckConsistency ()
{
    const float MyEpsilon = 0.001f;
    m_Range.y = std::max (m_Range.x + MyEpsilon, m_Range.y);
}

template<class TransferFunction>
void RotationBySpeedModule::Transfer (TransferFunction& transfer)
{
    ParticleSystemModule::Transfer (transfer);
    transfer.Transfer (m_Curve, "curve");
    transfer.Transfer (m_Range, "range");
}
INSTANTIATE_TEMPLATE_TRANSFER(RotationBySpeedModule)

NS_RRP_END