axmol/extensions/Particle3D/PU/CCPUPathFollower.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://adxeproject.github.io/

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#include "CCPUPathFollower.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN

PUPathFollower::PUPathFollower(void) {}

PUPathFollower::~PUPathFollower(void) {}

//-----------------------------------------------------------------------
void PUPathFollower::addPoint(const Vec3& point)
{
    _spline.addPoint(point);
}
//-----------------------------------------------------------------------
void PUPathFollower::clearPoints()
{
    _spline.clear();
}
//-----------------------------------------------------------------------

void PUPathFollower::updatePUAffector(PUParticle3D* particle, float deltaTime)
{
    // for (auto iter : _particleSystem->getParticles())
    {
        // PUParticle3D *particle = iter;
        if (_spline.getNumPoints() > 0)
        {
            // PU 1.4
            float timeLeft              = particle->totalTimeToLive - particle->timeToLive;
            float timeFraction          = timeLeft / particle->totalTimeToLive;
            float timeFractionPlusDelta = (timeLeft + deltaTime) / particle->totalTimeToLive;
            timeFractionPlusDelta       = timeFractionPlusDelta < 1.0f ? timeFractionPlusDelta : 1.0f;
            Vec3 inter = _spline.interpolate(timeFractionPlusDelta) - _spline.interpolate(timeFraction);
            particle->position.add(_affectorScale.x * inter.x, _affectorScale.y * inter.y, _affectorScale.z * inter.z);
        }
    }
}

PUPathFollower* PUPathFollower::create()
{
    auto ppf = new PUPathFollower();
    ppf->autorelease();
    return ppf;
}

void PUPathFollower::copyAttributesTo(PUAffector* affector)
{
    PUAffector::copyAttributesTo(affector);
    PUPathFollower* pathFollower = static_cast<PUPathFollower*>(affector);
    unsigned short numPoints     = _spline.getNumPoints();
    pathFollower->_spline.clear();
    for (unsigned short i = 0; i < numPoints; ++i)
    {
        pathFollower->_spline.addPoint(_spline.getPoint(i));
    }
}

NS_CC_END