mirror of https://github.com/axmolengine/axmol.git
117 lines
4.1 KiB
C++
117 lines
4.1 KiB
C++
/****************************************************************************
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Copyright (C) 2013 Henry van Merode. All rights reserved.
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Copyright (c) 2015-2016 Chukong Technologies Inc.
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Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.
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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 "CCPUParticleFollower.h"
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#include "extensions/Particle3D/PU/CCPUParticleSystem3D.h"
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NS_CC_BEGIN
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// Constants
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const float PUParticleFollower::DEFAULT_MAX_DISTANCE = 3.40282e+038f;
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const float PUParticleFollower::DEFAULT_MIN_DISTANCE = 10.0f;
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//-----------------------------------------------------------------------
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PUParticleFollower::PUParticleFollower() :
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PUAffector(),
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_minDistance(DEFAULT_MIN_DISTANCE),
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_maxDistance(DEFAULT_MAX_DISTANCE),
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_first(false)
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{
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}
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PUParticleFollower::~PUParticleFollower( void )
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{
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}
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//-----------------------------------------------------------------------
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float PUParticleFollower::getMaxDistance() const
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{
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return _maxDistance;
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}
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//-----------------------------------------------------------------------
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void PUParticleFollower::setMaxDistance(float maxDistance)
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{
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_maxDistance = maxDistance;
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}
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//-----------------------------------------------------------------------
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float PUParticleFollower::getMinDistance() const
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{
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return _minDistance;
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}
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//-----------------------------------------------------------------------
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void PUParticleFollower::setMinDistance(float minDistance)
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{
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_minDistance = minDistance;
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}
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void PUParticleFollower::updatePUAffector( PUParticle3D *particle, float /*deltaTime*/ )
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{
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//_first = true;
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//for (auto iter : _particleSystem->getParticles())
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{
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//PUParticle3D *particle = iter;
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if (!_first)
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{
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// Change in V 1.3.1
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// Only proceed if it isn the first one. Compensate for scaling.
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float distance = (particle->position).distance(_positionPreviousParticle);
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float avgScale = 0.3333f * (_affectorScale.x + _affectorScale.y + _affectorScale.z);
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float scaledMinDistance = avgScale * _minDistance;
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if (distance > scaledMinDistance && distance < avgScale * _maxDistance)
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{
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// This particle drifts too much from the previous one; correct it!
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float f = scaledMinDistance/distance;
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particle->position = _positionPreviousParticle + f * (particle->position - _positionPreviousParticle);
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}
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}
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_positionPreviousParticle = particle->position;
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_first = false;
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}
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}
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void PUParticleFollower::firstParticleUpdate( PUParticle3D* /*particle*/, float /*deltaTime*/ )
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{
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_first = true;
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}
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PUParticleFollower* PUParticleFollower::create()
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{
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auto ppf = new (std::nothrow) PUParticleFollower();
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ppf->autorelease();
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return ppf;
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}
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void PUParticleFollower::copyAttributesTo( PUAffector* affector )
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{
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PUAffector::copyAttributesTo(affector);
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PUParticleFollower* particleFollower = static_cast<PUParticleFollower*>(affector);
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particleFollower->_maxDistance = _maxDistance;
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particleFollower->_minDistance = _minDistance;
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}
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NS_CC_END
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