axmol/extensions/Particle3D/PU/CCPUScaleVelocityAffector.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 "CCPUScaleVelocityAffector.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN
// Constants
const float PUScaleVelocityAffector::DEFAULT_VELOCITY_SCALE = 1.0f;

//-----------------------------------------------------------------------
PUScaleVelocityAffector::PUScaleVelocityAffector() : PUAffector(), _sinceStartSystem(false), _stopAtFlip(false)
{
    _dynScaleVelocity = new PUDynamicAttributeFixed();
    (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
}
//-----------------------------------------------------------------------
PUScaleVelocityAffector::~PUScaleVelocityAffector()
{
    if (_dynScaleVelocity)
    {
        CC_SAFE_DELETE(_dynScaleVelocity);
    }
}
//-----------------------------------------------------------------------
void PUScaleVelocityAffector::updatePUAffector(PUParticle3D* particle, float deltaTime)
{
    // for (auto iter : _particleSystem->getParticles())
    {
        // PUParticle3D *particle = iter;
        float ds = 0;
        if (_sinceStartSystem)
        {
            // If control points are used (curved type), the first value of each control point is seconds from the start
            // of the system
            ds = deltaTime * _dynamicAttributeHelper.calculate(
                                 _dynScaleVelocity,
                                 (static_cast<PUParticleSystem3D*>(_particleSystem))->getTimeElapsedSinceStart());
        }
        else
        {
            // If control points are used (curved type), the first value of each control point is the fraction of the
            // particle lifetime [0..1]
            ds = deltaTime * _dynamicAttributeHelper.calculate(_dynScaleVelocity, particle->timeFraction);
        }
        float length    = particle->direction.length();  // Use length for a better delta direction value
        Vec3 calculated = particle->direction;
        calculated.x += ds * (particle->direction.x / length);
        calculated.y += ds * (particle->direction.y / length);
        calculated.z += ds * (particle->direction.z / length);

        if (_stopAtFlip)
        {
            if ((calculated.x > 0.0f && particle->direction.x < 0.0f) ||
                (calculated.y > 0.0f && particle->direction.y < 0.0f) ||
                (calculated.z > 0.0f && particle->direction.z < 0.0f) ||
                (calculated.x < 0.0f && particle->direction.x > 0.0f) ||
                (calculated.y < 0.0f && particle->direction.y > 0.0f) ||
                (calculated.z < 0.0f && particle->direction.z > 0.0f))
                return;
        }

        particle->direction = calculated;
    }
}

//-----------------------------------------------------------------------
void PUScaleVelocityAffector::setDynScaleVelocity(PUDynamicAttribute* dynScaleVelocity)
{
    if (_dynScaleVelocity)
        CC_SAFE_DELETE(_dynScaleVelocity);

    _dynScaleVelocity = dynScaleVelocity;
}
//-----------------------------------------------------------------------
void PUScaleVelocityAffector::resetDynScaleVelocity(bool resetToDefault)
{
    if (resetToDefault)
    {
        CC_SAFE_DELETE(_dynScaleVelocity);
        _dynScaleVelocity = new PUDynamicAttributeFixed();
        (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
    }
}

PUScaleVelocityAffector* PUScaleVelocityAffector::create()
{
    auto psva = new PUScaleVelocityAffector();
    psva->autorelease();
    return psva;
}

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

    PUScaleVelocityAffector* scaleVelocityAffector = static_cast<PUScaleVelocityAffector*>(affector);
    scaleVelocityAffector->setDynScaleVelocity(getDynScaleVelocity()->clone());
    scaleVelocityAffector->_sinceStartSystem = _sinceStartSystem;
    scaleVelocityAffector->_stopAtFlip       = _stopAtFlip;
}

NS_CC_END