axmol/extensions/Particle3D/PU/CCPUVortexAffector.cpp

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015 Chukong Technologies Inc.
 
 http://www.cocos2d-x.org
 
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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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 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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#include "CCPUVortexAffector.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN

// Constants
const Vec3 PUVortexAffector::DEFAULT_ROTATION_VECTOR(0, 0, 0);
const float PUVortexAffector::DEFAULT_ROTATION_SPEED = 1.0f;

//-----------------------------------------------------------------------
PUVortexAffector::PUVortexAffector(void) : 
    PUAffector(),
    _rotationVector(DEFAULT_ROTATION_VECTOR)
{
    _dynRotationSpeed = new (std::nothrow) PUDynamicAttributeFixed();
    (static_cast<PUDynamicAttributeFixed*>(_dynRotationSpeed))->setValue(DEFAULT_ROTATION_SPEED);
}
//-----------------------------------------------------------------------
PUVortexAffector::~PUVortexAffector(void)
{
    if (_dynRotationSpeed)
    {
        CC_SAFE_DELETE(_dynRotationSpeed);
    }
}
//-----------------------------------------------------------------------
const Vec3& PUVortexAffector::getRotationVector(void) const
{
    return _rotationVector;
}
//-----------------------------------------------------------------------
void PUVortexAffector::setRotationVector(const Vec3& rotationVector)
{
    _rotationVector = rotationVector;
}
//-----------------------------------------------------------------------
PUDynamicAttribute* PUVortexAffector::getRotationSpeed(void) const
{
    return _dynRotationSpeed;
}
//-----------------------------------------------------------------------
void PUVortexAffector::setRotationSpeed(PUDynamicAttribute* dynRotationSpeed)
{
    if (_dynRotationSpeed)
        CC_SAFE_DELETE(_dynRotationSpeed);

    _dynRotationSpeed = dynRotationSpeed;
}
//-----------------------------------------------------------------------
float PUVortexAffector::calculateRotationSpeed(void)
{
    return float(_dynamicAttributeHelper.calculate(_dynRotationSpeed, (static_cast<PUParticleSystem3D *>(_particleSystem))->getTimeElapsedSinceStart()));
}
//-----------------------------------------------------------------------

void PUVortexAffector::updatePUAffector( PUParticle3D *particle, float deltaTime )
{
    //for (auto iter : _particleSystem->getParticles())
    {
        //PUParticle3D *particle = iter;
        // Explicitly check on 'freezed', because it passes the techniques' validation.
        if (particle->isFreezed())
            return;

        // Rotate position, direction and orientation (visible particle only) and compensate for the affector position
        // Also take the affect specialisation into account
        Mat4 rotMat;
        Mat4::createRotation(_rotation, &rotMat);
        Vec3 local = particle->position - _derivedPosition;
        particle->position = _derivedPosition + rotMat * local;
        particle->direction = rotMat * particle->direction;
        particle->orientation = _rotation * particle->orientation;
    }
}

void PUVortexAffector::preUpdateAffector( float deltaTime )
{
    PUParticleSystem3D* sys = static_cast<PUParticleSystem3D *>(_particleSystem);

    if (sys)
    {
        Mat4 rotMat;
        Mat4::createRotation(sys->getDerivedOrientation(), &rotMat);
        _rotation.set(rotMat * _rotationVector, float(calculateRotationSpeed() * deltaTime));
    }
    else
    {
        _rotation.set(_rotationVector, float(calculateRotationSpeed() * deltaTime));
    }

    getDerivedPosition();
}

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

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

    PUVortexAffector* vortexAffector = static_cast<PUVortexAffector*>(affector);
    vortexAffector->_rotation = _rotation;
    vortexAffector->_rotationVector = _rotationVector;
    vortexAffector->setRotationSpeed(getRotationSpeed()->clone());
}

NS_CC_END