70 lines
2.7 KiB
C++
70 lines
2.7 KiB
C++
|
/****************************************************************************
|
||
|
|
Copyright (c) 2011-2013,WebJet Business Division,CYOU
|
||
|
|
|
||
|
|
http://www.genesis-3d.com.cn
|
||
|
|
|
||
|
|
Permission is hereby granted, free of charge, to any person obtaining a copy
|
||
|
|
of this software and associated documentation files (the "Software"), to deal
|
||
|
|
in the Software without restriction, including without limitation the rights
|
||
|
|
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
||
|
|
copies of the Software, and to permit persons to whom the Software is
|
||
|
|
furnished to do so, subject to the following conditions:
|
||
|
|
|
||
|
|
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,
|
||
|
|
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
||
|
|
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
||
|
|
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
||
|
|
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
||
|
|
THE SOFTWARE.
|
||
|
|
****************************************************************************/
|
||
|
|
#include "stdneb.h"
|
||
|
|
#include "particleFollowerAffector.h"
|
||
|
|
#include "particles/particleaffector.h"
|
||
|
|
#include "particles/particle.h"
|
||
|
|
|
||
|
|
namespace Particles
|
||
|
|
{
|
||
|
|
using namespace Math;
|
||
|
|
|
||
|
|
__ImplementClass(Particles::ParticleFollowerAffector, CPFCC::AFFECTOR_FOLLOWER, Particles::ParticleAffector);
|
||
|
|
|
||
|
|
const Math::scalar ParticleFollowerAffector::DEFAULT_MIN_DISTANCE = 5.0f;
|
||
|
|
const Math::scalar ParticleFollowerAffector::DEFAULT_MAX_DISTANCE = 10.0f;
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
ParticleFollowerAffector::ParticleFollowerAffector(void) : ParticleAffector(),
|
||
|
|
mMinDistance(DEFAULT_MIN_DISTANCE),
|
||
|
|
mMaxDistance(DEFAULT_MAX_DISTANCE),
|
||
|
|
mPositionPreviousParticle(ConstDefine::FLOAT3_ZERO),
|
||
|
|
mFirst(false)
|
||
|
|
{
|
||
|
|
mName = "FollowerAffector";
|
||
|
|
}
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
void ParticleFollowerAffector::_firstParticle( Particle* particle )
|
||
|
|
{
|
||
|
|
mFirst = true;
|
||
|
|
}
|
||
|
|
//-----------------------------------------------------------------------
|
||
|
|
void ParticleFollowerAffector::_affect(Particle* particle)
|
||
|
|
{
|
||
|
|
if(!GetEnable())
|
||
|
|
return;
|
||
|
|
if (!mFirst)
|
||
|
|
{
|
||
|
|
Math::scalar distance = particle->mPosition.distance(mPositionPreviousParticle);
|
||
|
|
if (distance > mMinDistance && distance < mMaxDistance)
|
||
|
|
{
|
||
|
|
Math::scalar f = mMinDistance/distance;
|
||
|
|
particle->mPosition = mPositionPreviousParticle + f * (particle->mPosition - mPositionPreviousParticle);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
mPositionPreviousParticle = particle->mPosition;
|
||
|
|
mFirst = false;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|