axmol/extensions/Particle3D/PU/CCPUVelocityMatchingAffector.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.

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 all copies or substantial portions of the Software.

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#include "CCPUVelocityMatchingAffector.h"
#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"

NS_CC_BEGIN
// Constants
const float PUVelocityMatchingAffector::DEFAULT_RADIUS = 100.0f;

//-----------------------------------------------------------------------
PUVelocityMatchingAffector::PUVelocityMatchingAffector() : PUAffector(), _radius(DEFAULT_RADIUS) {}

PUVelocityMatchingAffector::~PUVelocityMatchingAffector(void) {}

//-----------------------------------------------------------------------
float PUVelocityMatchingAffector::getRadius() const
{
    return _radius;
}
//-----------------------------------------------------------------------
void PUVelocityMatchingAffector::setRadius(float radius)
{
    _radius = radius;
}
////-----------------------------------------------------------------------
// void Particle3DVelocityMatchingAffector::_prepare(ParticleTechnique* particleTechnique)
//{
//	// Activate spatial hashing
//	particleTechnique->setSpatialHashingUsed(true);
// }
////-----------------------------------------------------------------------
// void Particle3DVelocityMatchingAffector::_unprepare(ParticleTechnique* particleTechnique)
//{
//	// Activate spatial hashing
//	particleTechnique->setSpatialHashingUsed(false);
// }
//-----------------------------------------------------------------------

void PUVelocityMatchingAffector::updatePUAffector(PUParticle3D* /*particle*/, float /*deltaTime*/)
{
    // for (auto iter : _particleSystem->getParticles())
    //{
    //     PUParticle3D *particle = iter;
    //	// Determine neighbouring particles.
    //	SpatialHashTable<Particle*>* hashtable = particleTechnique->getSpatialHashTable();
    //	if (hashtable)
    //	{
    //		SpatialHashTable<Particle*>::HashTableCell cell = hashtable->getCell(particle->position);
    //		if (cell.empty())
    //			return;

    //		unsigned int size = static_cast<unsigned int>(cell.size());
    //		Vec3 sumDirection;
    //		Vec3 diff;
    //		unsigned int count = 0;
    //		for (unsigned int i = 0; i < size; ++i)
    //		{
    //			Particle* p = cell[i];

    //			// Don't check if it is the same particle
    //			if (particle != p)
    //			{
    //				// Validate whether the neighbouring particle is within range
    //				diff = p->position - particle->position;
    //				if (diff.length() < _radius)
    //				{
    //					sumDirection += p->direction;
    //					count++;
    //				}
    //			}
    //		}

    //		// Adjust direction
    //		if (count > 0)
    //		{
    //			sumDirection = sumDirection / (float)count;
    //			particle->direction += (sumDirection - particle->direction) * deltaTime;
    //		}
    //	}
    //}
}

PUVelocityMatchingAffector* PUVelocityMatchingAffector::create()
{
    auto pvma = new PUVelocityMatchingAffector();
    pvma->autorelease();
    return pvma;
}

void PUVelocityMatchingAffector::copyAttributesTo(PUAffector* affector)
{
    PUAffector::copyAttributesTo(affector);
    PUVelocityMatchingAffector* velocityMatchingAffector = static_cast<PUVelocityMatchingAffector*>(affector);
    velocityMatchingAffector->_radius                    = _radius;
}

NS_CC_END