axmol/extensions/Particle3D/ParticleUniverse/ParticleAffectors/CCPUParticle3DVelocityMatchingAffector.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
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#include "CCPUParticle3DVelocityMatchingAffector.h"
#include "extensions/Particle3D/ParticleUniverse/CCPUParticleSystem3D.h"

NS_CC_BEGIN
// Constants
const float PUParticle3DVelocityMatchingAffector::DEFAULT_RADIUS = 100.0f;

//-----------------------------------------------------------------------
PUParticle3DVelocityMatchingAffector::PUParticle3DVelocityMatchingAffector(void) : 
    PUParticle3DAffector(),
    _radius(DEFAULT_RADIUS)
{
}

PUParticle3DVelocityMatchingAffector::~PUParticle3DVelocityMatchingAffector( void )
{

}

//-----------------------------------------------------------------------
float PUParticle3DVelocityMatchingAffector::getRadius(void) const
{
    return _radius;
}
//-----------------------------------------------------------------------
void PUParticle3DVelocityMatchingAffector::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 PUParticle3DVelocityMatchingAffector::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::ZERO;
    //		Vec3 diff = Vec3::ZERO;
    //		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;
    //		}
    //	}
    //}
}

PUParticle3DVelocityMatchingAffector* PUParticle3DVelocityMatchingAffector::create()
{
    auto pvma = new (std::nothrow) PUParticle3DVelocityMatchingAffector();
    pvma->autorelease();
    return pvma;
}

void PUParticle3DVelocityMatchingAffector::copyAttributesTo( PUParticle3DAffector* affector )
{
    PUParticle3DAffector::copyAttributesTo(affector);
    PUParticle3DVelocityMatchingAffector* velocityMatchingAffector = static_cast<PUParticle3DVelocityMatchingAffector*>(affector);
    velocityMatchingAffector->_radius = _radius;
}

NS_CC_END