mirror of https://github.com/axmolengine/axmol.git
75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
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/****************************************************************************
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Copyright (c) 2014 Chukong Technologies Inc.
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http://www.cocos2d-x.org
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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****************************************************************************/
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#include "CCPUParticle3DFlockCenteringAffector.h"
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#include "3dparticle/ParticleUniverse/CCPUParticleSystem3D.h"
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NS_CC_BEGIN
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//-----------------------------------------------------------------------
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PUParticle3DFlockCenteringAffector::PUParticle3DFlockCenteringAffector()
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: PUParticle3DAffector(),
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_sum(Vec3::ZERO),
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_average(Vec3::ZERO),
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_count(0.0f)
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{
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}
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PUParticle3DFlockCenteringAffector::~PUParticle3DFlockCenteringAffector()
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{
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}
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void PUParticle3DFlockCenteringAffector::updatePUAffector( PUParticle3D *particle, float deltaTime )
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{
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//for (auto iter : _particleSystem->getParticles())
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{
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//PUParticle3D *particle = iter;
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_sum += particle->position;
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_count++;
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particle->direction += (_average - particle->position) * deltaTime; // use average of the previous update
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}
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}
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void PUParticle3DFlockCenteringAffector::preUpdateAffector( float deltaTime )
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{
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if (_count != 0)
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{
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// Calculate the average of the previous update
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_average = _sum / _count;
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}
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else
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{
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_average = getDerivedPosition(); // Set to position of the affector
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}
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_sum = Vec3::ZERO;
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_count = 0;
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}
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PUParticle3DFlockCenteringAffector* PUParticle3DFlockCenteringAffector::create()
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{
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auto pfca = new PUParticle3DFlockCenteringAffector();
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pfca->autorelease();
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return pfca;
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}
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NS_CC_END
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