axmol/extensions/Particle3D/PU/CCPUSineForceAffector.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015 Chukong Technologies Inc.
 
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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "CCPUSineForceAffector.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN
// Constants
const float PUSineForceAffector::DEFAULT_FREQ_MIN = 1.0f;
const float PUSineForceAffector::DEFAULT_FREQ_MAX = 1.0f;

//-----------------------------------------------------------------------
PUSineForceAffector::PUSineForceAffector(void) : 
    PUBaseForceAffector(),
    _angle(361),
    _frequencyMin(DEFAULT_FREQ_MIN),
    _frequencyMax(DEFAULT_FREQ_MAX),
    _frequency(1.0f)
{
}
PUSineForceAffector::~PUSineForceAffector( void )
{

}
//-----------------------------------------------------------------------
void PUSineForceAffector::preUpdateAffector(float deltaTime)
{
    // Scale by time
    _angle += _frequency * deltaTime;
    float sineValue = sin(_angle);
    _scaledVector = _forceVector * deltaTime * sineValue;

    if (_angle > M_PI * 2.0f)
    {
        _angle = 0.0f;

        if (_frequencyMin != _frequencyMax)
        {
            _frequency = cocos2d::random(_frequencyMin, _frequencyMax);
        }
    }
}
//-----------------------------------------------------------------------
const float PUSineForceAffector::getFrequencyMin(void) const
{
    return _frequencyMin;
}
//-----------------------------------------------------------------------
void PUSineForceAffector::setFrequencyMin(const float frequencyMin)
{
    _frequencyMin = frequencyMin;
    if (frequencyMin > _frequencyMax)
    {
        _frequency = frequencyMin;
    }
}
//-----------------------------------------------------------------------
const float PUSineForceAffector::getFrequencyMax(void) const
{
    return _frequencyMax;
}
//-----------------------------------------------------------------------
void PUSineForceAffector::setFrequencyMax(const float frequencyMax)
{
    _frequencyMax = frequencyMax;
    _frequency = frequencyMax;
}
//-----------------------------------------------------------------------

void PUSineForceAffector::updatePUAffector( PUParticle3D *particle, float deltaTime )
{
    //for (auto iter : _particleSystem->getParticles())
    {
        //PUParticle3D *particle = iter;
        // Affect the direction
        if (_forceApplication == FA_ADD)
        {
            particle->direction += _scaledVector;
        }
        else
        {
            particle->direction = (particle->direction + _forceVector) / 2;
        }
    }
}

PUSineForceAffector* PUSineForceAffector::create()
{
    auto psfa = new (std::nothrow) PUSineForceAffector();
    psfa->autorelease();
    return psfa;
}

void PUSineForceAffector::copyAttributesTo( PUAffector* affector )
{
    PUAffector::copyAttributesTo(affector);

    PUSineForceAffector* sineForceAffector = static_cast<PUSineForceAffector*>(affector);
    sineForceAffector->_frequencyMin = _frequencyMin;
    sineForceAffector->_frequencyMax = _frequencyMax;
    sineForceAffector->_frequency = _frequency;
    sineForceAffector->_angle = _angle;
}

NS_CC_END