axmol/extensions/Particle3D/PU/CCPUDoScaleEventHandler.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.

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

NS_CC_BEGIN

// Constants
const PUDoScaleEventHandler::ScaleType PUDoScaleEventHandler::DEFAULT_SCALE_TYPE =
    PUDoScaleEventHandler::ST_TIME_TO_LIVE;
const float PUDoScaleEventHandler::DEFAULT_SCALE_FRACTION = 0.2f;

//-----------------------------------------------------------------------
PUDoScaleEventHandler::PUDoScaleEventHandler()
    : PUEventHandler(), _scaleFraction(DEFAULT_SCALE_FRACTION), _scaleType(DEFAULT_SCALE_TYPE)
{}
//-----------------------------------------------------------------------
const PUDoScaleEventHandler::ScaleType& PUDoScaleEventHandler::getScaleType() const
{
    return _scaleType;
}
//-----------------------------------------------------------------------
void PUDoScaleEventHandler::setScaleType(const PUDoScaleEventHandler::ScaleType& scaleType)
{
    _scaleType = scaleType;
}
//-----------------------------------------------------------------------
float PUDoScaleEventHandler::getScaleFraction() const
{
    return _scaleFraction;
}
//-----------------------------------------------------------------------
void PUDoScaleEventHandler::setScaleFraction(const float scaleFraction)
{
    _scaleFraction = scaleFraction;
}
//-----------------------------------------------------------------------
void PUDoScaleEventHandler::handle(PUParticleSystem3D* /*particleSystem*/, PUParticle3D* particle, float timeElapsed)
{
    if (!particle)
        return;

    switch (_scaleType)
    {
    case ST_TIME_TO_LIVE:
        particle->timeToLive -= timeElapsed * _scaleFraction * particle->timeToLive;
        break;

    case ST_VELOCITY:
        particle->direction += timeElapsed * _scaleFraction * particle->direction;
        break;
    }
}

PUDoScaleEventHandler* PUDoScaleEventHandler::create()
{
    auto peh = new PUDoScaleEventHandler();
    peh->autorelease();
    return peh;
}

void PUDoScaleEventHandler::copyAttributesTo(PUEventHandler* eventHandler)
{
    PUEventHandler::copyAttributesTo(eventHandler);
    PUDoScaleEventHandler* doScaleEventHandler = static_cast<PUDoScaleEventHandler*>(eventHandler);
    doScaleEventHandler->setScaleFraction(_scaleFraction);
    doScaleEventHandler->setScaleType(_scaleType);
}

NS_CC_END