axmol/extensions/Particle3D/PU/PUSlaveEmitter.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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 of this software and associated documentation files (the "Software"), to deal
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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 "PUSlaveEmitter.h"
#include "extensions/Particle3D/PU/PUParticleSystem3D.h"
#include "extensions/Particle3D/PU/PUSlaveBehaviour.h"

NS_AX_BEGIN
//-----------------------------------------------------------------------
PUSlaveEmitter::PUSlaveEmitter()
    : PUEmitter()
    , PUListener()
    , _masterParticle(0)
    , _masterTechniqueName()
    , _masterEmitterName()
    , _masterEmitterNameSet(false)
{}
//-----------------------------------------------------------------------
std::string_view PUSlaveEmitter::getMasterTechniqueName() const
{
    return _masterTechniqueName;
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::setMasterTechniqueName(std::string_view masterTechniqueName)
{
    _masterTechniqueName = masterTechniqueName;
}
//-----------------------------------------------------------------------
std::string_view PUSlaveEmitter::getMasterEmitterName() const
{
    return _masterEmitterName;
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::setMasterEmitterName(std::string_view masterEmitterName)
{
    _masterEmitterName    = masterEmitterName;
    _masterEmitterNameSet = true;
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::particleEmitted(PUParticleSystem3D* /*particleSystem*/, PUParticle3D* particle)
{
    if (_masterEmitterNameSet && _masterEmitterName != particle->parentEmitter->getName())
    {
        // Ignore particle
        return;
    }

    /** Keep the data of the emitted particle from the master technique/emitter.
        Emission if a particle in this emitter may NOT be done in the main _update() method of the ParticleSystem,
        but only from here ( a slave afterall). That is why the emitter is enabled and disabled again.
    */
    _masterPosition  = particle->position;
    _masterDirection = particle->direction;
    _masterParticle  = particle;
    _isEnabled       = true;
    static_cast<PUParticleSystem3D*>(_particleSystem)
        ->forceEmission(this, 1);  // Just emit one, to be in sync with the master.
    _isEnabled = false;
}

void PUSlaveEmitter::particleExpired(PUParticleSystem3D* /*particleSystem*/, PUParticle3D* /*particle*/) {}

//-----------------------------------------------------------------------
void PUSlaveEmitter::initParticlePosition(PUParticle3D* particle)
{
    // Remark: Don't take the orientation of the node into account, because the position of the master particle is
    // leading.
    particle->position         = _masterPosition;
    particle->originalPosition = particle->position;
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::initParticleDirection(PUParticle3D* particle)
{
    particle->direction               = _masterDirection;
    particle->originalDirection       = particle->direction;
    particle->originalDirectionLength = particle->direction.length();

    // Make use of the opportunity to set the master particle in the behaviour object (if available)

    for (auto&& iter : particle->behaviours)
    {
        if (iter->getBehaviourType() == "Slave")
        {
            static_cast<PUSlaveBehaviour*>(iter)->masterParticle = _masterParticle;
        }
    }
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::prepare()
{
    PUEmitter::prepare();
    PUParticleSystem3D* system = dynamic_cast<PUParticleSystem3D*>(_particleSystem)->getParentParticleSystem();
    if (system)
    {
        auto children = system->getChildren();
        for (auto&& it : children)
        {
            if (it->getName() == _masterTechniqueName)
            {
                static_cast<PUParticleSystem3D*>(it)->addListener(this);
                break;
            }
        }

        _isEnabled = false;
    }
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::unPrepare()
{
    PUEmitter::unPrepare();
    PUParticleSystem3D* system = dynamic_cast<PUParticleSystem3D*>(_particleSystem)->getParentParticleSystem();
    if (system)
    {
        auto children = system->getChildren();
        for (auto&& it : children)
        {
            if (it->getName() == _masterTechniqueName)
            {
                static_cast<PUParticleSystem3D*>(it)->removeListener(this);
                break;
            }
        }
    }

    PUEmitter::unPrepare();
}
//-----------------------------------------------------------------------
void PUSlaveEmitter::notifyStart()
{
    PUEmitter::notifyStart();
    setEnabled(false);
}

PUSlaveEmitter* PUSlaveEmitter::create()
{
    auto pe = new PUSlaveEmitter();
    pe->autorelease();
    return pe;
}

void PUSlaveEmitter::copyAttributesTo(PUEmitter* emitter)
{
    PUEmitter::copyAttributesTo(emitter);

    PUSlaveEmitter* slaveEmitter        = static_cast<PUSlaveEmitter*>(emitter);
    slaveEmitter->_masterTechniqueName  = _masterTechniqueName;
    slaveEmitter->_masterEmitterName    = _masterEmitterName;
    slaveEmitter->_masterEmitterNameSet = _masterEmitterNameSet;
}

PUSlaveEmitter* PUSlaveEmitter::clone()
{
    auto be = PUSlaveEmitter::create();
    copyAttributesTo(be);
    return be;
}

NS_AX_END