//-----------------------------------------------------------------------
inline void GravityAffector::_affect(ParticleTechnique* particleTechnique, Particle* particle, Ogre::Real timeElapsed)
{
/** Applying Newton's law of universal gravitation. */
Ogre::Vector3 distance = mDerivedPosition - particle->position;
Ogre::Real length = distance.squaredLength();
if (length > 0)
{
Ogre::Real force = (mGravity * particle->mass * mass) / length;
particle->direction += force * distance * timeElapsed * _calculateAffectSpecialisationFactor(particle);
}
}
//-----------------------------------------------------------------------
void LinearForceAffector::_affect(ParticleTechnique* particleTechnique, Particle* particle, Real timeElapsed)
{
// Affect the direction and take the specialisation into account
if (mForceApplication == FA_ADD)
{
particle->direction += mScaledVector * _calculateAffectSpecialisationFactor(particle);
}
else
{
particle->direction = (particle->direction + mForceVector) / 2;
}
}
