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

NS_CC_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(void) : 
    PUAffector(),
    _maxDeviationX(DEFAULT_MAX_DEVIATION.x),
    _maxDeviationY(DEFAULT_MAX_DEVIATION.y),
    _maxDeviationZ(DEFAULT_MAX_DEVIATION.z),
    _timeSinceLastUpdate(0.0f),
    _timeStep(DEFAULT_TIME_STEP),
    _update(true),
    _randomDirection(DEFAULT_RANDOM_DIRECTION)
{
}
PURandomiser::~PURandomiser( void )
{

}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationX(void) const
{
    return _maxDeviationX;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationX(float maxDeviationX)
{
    _maxDeviationX = maxDeviationX;
}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationY(void) const
{
    return _maxDeviationY;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationY(float maxDeviationY)
{
    _maxDeviationY = maxDeviationY;
}
//-----------------------------------------------------------------------
float PURandomiser::getMaxDeviationZ(void) const
{
    return _maxDeviationZ;
}
//-----------------------------------------------------------------------
void PURandomiser::setMaxDeviationZ(float maxDeviationZ)
{
    _maxDeviationZ = maxDeviationZ;
}
//-----------------------------------------------------------------------
float PURandomiser::getTimeStep(void) const
{
    return _timeStep;
}
//-----------------------------------------------------------------------
void PURandomiser::setTimeStep(float timeStep)
{
    _timeStep = timeStep;
    _timeSinceLastUpdate = timeStep;
}
//-----------------------------------------------------------------------
bool PURandomiser::isRandomDirection(void) 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 += Vec3(CCRANDOM_MINUS1_1() * _maxDeviationX,
                    CCRANDOM_MINUS1_1() * _maxDeviationY,
                    CCRANDOM_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 += Vec3(CCRANDOM_MINUS1_1() * _maxDeviationX * _affectorScale.x,
                    CCRANDOM_MINUS1_1() * _maxDeviationY * _affectorScale.y,
                    CCRANDOM_MINUS1_1() * _maxDeviationZ * _affectorScale.z);
            }
        }
    }
}

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

PURandomiser* PURandomiser::create()
{
    auto pr = new (std::nothrow) 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_CC_END