axmol/extensions/Particle3D/ParticleUniverse/ParticleAffectors/CCPUParticle3DScaleVelocityAffector.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
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#include "CCPUParticle3DScaleVelocityAffector.h"
#include "extensions/Particle3D/ParticleUniverse/CCPUParticleSystem3D.h"

NS_CC_BEGIN
// Constants
const float PUParticle3DScaleVelocityAffector::DEFAULT_VELOCITY_SCALE = 1.0f;

//-----------------------------------------------------------------------
PUParticle3DScaleVelocityAffector::PUParticle3DScaleVelocityAffector(void) : 
    PUParticle3DAffector(),
    _sinceStartSystem(false),
    _stopAtFlip(false)
{
    _dynScaleVelocity = new (std::nothrow) PUDynamicAttributeFixed();
    (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
}
//-----------------------------------------------------------------------
PUParticle3DScaleVelocityAffector::~PUParticle3DScaleVelocityAffector(void)
{
    if (_dynScaleVelocity)
    {
        CC_SAFE_DELETE(_dynScaleVelocity);
    }
}
//-----------------------------------------------------------------------
void PUParticle3DScaleVelocityAffector::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 PUParticle3DScaleVelocityAffector::setDynScaleVelocity(PUDynamicAttribute* dynScaleVelocity)
{
    if (_dynScaleVelocity)
        CC_SAFE_DELETE(_dynScaleVelocity);

    _dynScaleVelocity = dynScaleVelocity;
}
//-----------------------------------------------------------------------
void PUParticle3DScaleVelocityAffector::resetDynScaleVelocity(bool resetToDefault)
{
    if (resetToDefault)
    {
        CC_SAFE_DELETE(_dynScaleVelocity);
        _dynScaleVelocity = new (std::nothrow) PUDynamicAttributeFixed();
        (static_cast<PUDynamicAttributeFixed*>(_dynScaleVelocity))->setValue(DEFAULT_VELOCITY_SCALE);
    }
}

PUParticle3DScaleVelocityAffector* PUParticle3DScaleVelocityAffector::create()
{
    auto psva = new (std::nothrow) PUParticle3DScaleVelocityAffector();
    psva->autorelease();
    return psva;
}

NS_CC_END