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Implement Gravity particle affector effects

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This commit is contained in:
Chris Robinson 2013-04-13 13:03:45 -07:00
parent 5b30677e41
commit 9cc97b195c
1 changed files with 31 additions and 3 deletions
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34
libs/openengine/ogre/particles.cpp
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@ -274,10 +274,14 @@ public:
/** See Ogre::ParticleAffector. */
void _affectParticles(Ogre::ParticleSystem *psys, Ogre::Real timeElapsed)
{
Ogre::ParticleIterator pi = psys->_getIterator();
while (!pi.end())
switch(mForceType)
{
Ogre::Particle *p = pi.getNext();
case Type_Wind:
applyWindForce(psys, timeElapsed);
break;
case Type_Point:
applyPointForce(psys, timeElapsed);
break;
}
}
@ -307,6 +311,30 @@ public:
static CmdPosition msPositionCmd;
protected:
void applyWindForce(Ogre::ParticleSystem *psys, Ogre::Real timeElapsed)
{
const Ogre::Vector3 vec = mDirection * mForce * timeElapsed;
Ogre::ParticleIterator pi = psys->_getIterator();
while (!pi.end())
{
Ogre::Particle *p = pi.getNext();
p->direction += vec;
}
}
void applyPointForce(Ogre::ParticleSystem *psys, Ogre::Real timeElapsed)
{
const Ogre::Real force = mForce * timeElapsed;
Ogre::ParticleIterator pi = psys->_getIterator();
while (!pi.end())
{
Ogre::Particle *p = pi.getNext();
const Ogre::Vector3 vec = (p->position - mPosition).normalisedCopy() * force;
p->direction += vec;
}
}
float mForce;
ForceType mForceType;