axmol/extensions/Particle3D/PU/CCPURandomiser.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.

 https://axmolengine.github.io/

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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#include "CCPURandomiser.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_AX_BEGIN

// Constants
const Vec3 PURandomiser::DEFAULT_MAX_DEVIATION(0, 0, 0);
const float PURandomiser::DEFAULT_TIME_STEP       = 0.0f;
const bool PURandomiser::DEFAULT_RANDOM_DIRECTION = true;

//-----------------------------------------------------------------------
PURandomiser::PURandomiser()
    : PUAffector()
    , _maxDeviationX(DEFAULT_MAX_DEVIATION.x)
    , _maxDeviationY(DEFAULT_MAX_DEVIATION.y)
    , _maxDeviationZ(DEFAULT_MAX_DEVIATION.z)
    , _timeSinceLastUpdate(0.0f)
    , _timeStep(DEFAULT_TIME_STEP)
    , _randomDirection(DEFAULT_RANDOM_DIRECTION)
    , _update(true)
{}
PURandomiser::~PURandomiser(void) {}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationX() const
{
    return _maxDeviationX;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationX(float maxDeviationX)
{
    _maxDeviationX = maxDeviationX;
}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationY() const
{
    return _maxDeviationY;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationY(float maxDeviationY)
{
    _maxDeviationY = maxDeviationY;
}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationZ() const
{
    return _maxDeviationZ;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationZ(float maxDeviationZ)
{
    _maxDeviationZ = maxDeviationZ;
}
//-----------------------------------------------------------------------
float PURandomiser::getTimeStep() const
{
    return _timeStep;
}
//-----------------------------------------------------------------------
void PURandomiser::setTimeStep(float timeStep)
{
    _timeStep            = timeStep;
    _timeSinceLastUpdate = timeStep;
}
//-----------------------------------------------------------------------
bool PURandomiser::isRandomDirection() const
{
    return _randomDirection;
}
//-----------------------------------------------------------------------
void PURandomiser::setRandomDirection(bool randomDirection)
{
    _randomDirection = randomDirection;
}
//-----------------------------------------------------------------------
void PURandomiser::preUpdateAffector(float deltaTime)
{
    if (/*technique->getNumberOfEmittedParticles()*/ static_cast<PUParticleSystem3D*>(_particleSystem)
            ->getAliveParticleCount() > 0)
    {
        _timeSinceLastUpdate += deltaTime;
        if (_timeSinceLastUpdate > _timeStep)
        {
            _timeSinceLastUpdate -= _timeStep;
            _update = true;
        }
    }
}
//-----------------------------------------------------------------------
void PURandomiser::updatePUAffector(PUParticle3D* particle, float /*deltaTime*/)
{
    // for (auto&& iter : _particleSystem->getParticles())
    {
        // PUParticle3D *particle = iter;
        if (_update)
        {
            if (_randomDirection)
            {
                // Random direction: Change the direction after each update
                particle->direction.add(AXRANDOM_MINUS1_1() * _maxDeviationX, AXRANDOM_MINUS1_1() * _maxDeviationY,
                                        AXRANDOM_MINUS1_1() * _maxDeviationZ);
            }
            else
            {
                // Explicitly check on 'freezed', because it passes the techniques' validation.
                if (particle->isFreezed())
                    return;

                // Random position: Add the position deviation after each update
                particle->position.add(AXRANDOM_MINUS1_1() * _maxDeviationX * _affectorScale.x,
                                       AXRANDOM_MINUS1_1() * _maxDeviationY * _affectorScale.y,
                                       AXRANDOM_MINUS1_1() * _maxDeviationZ * _affectorScale.z);
            }
        }
    }
}

//-----------------------------------------------------------------------
void PURandomiser::postUpdateAffector(float /*deltaTime*/)
{
    _update = false;
}

PURandomiser* PURandomiser::create()
{
    auto pr = new PURandomiser();
    pr->autorelease();
    return pr;
}

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

    PURandomiser* randomiser   = static_cast<PURandomiser*>(affector);
    randomiser->_maxDeviationX = _maxDeviationX;
    randomiser->_maxDeviationY = _maxDeviationY;
    randomiser->_maxDeviationZ = _maxDeviationZ;
    randomiser->setTimeStep(_timeStep);  // Also sets time since last update to appropriate value
    randomiser->_randomDirection = _randomDirection;
}

NS_AX_END