India/cocos2d-x/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.
 
 http://www.cocos2d-x.org
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
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 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:
 
 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 "CCPUScaleVelocityAffector.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

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

//-----------------------------------------------------------------------
PUScaleVelocityAffector::PUScaleVelocityAffector(void) : 
    PUAffector(),
    _sinceStartSystem(false),
    _stopAtFlip(false)
{
    _dynScaleVelocity = new (std::nothrow) PUDynamicAttributeFixed();
    (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
}
//-----------------------------------------------------------------------
PUScaleVelocityAffector::~PUScaleVelocityAffector(void)
{
    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 (std::nothrow) PUDynamicAttributeFixed();
        (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
    }
}

PUScaleVelocityAffector* PUScaleVelocityAffector::create()
{
    auto psva = new (std::nothrow) 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