void PULinearForceAffector::updatePUAffector( PUParticle3D *particle, float /*deltaTime*/ )
{
//for (auto iter : _particleSystem->getParticles())
{
//PUParticle3D *particle = iter;
// Affect the direction and take the specialisation into account
if (_forceApplication == FA_ADD)
{
particle->direction += _scaledVector * calculateAffectSpecialisationFactor(particle);
}
else
{
particle->direction = (particle->direction + _forceVector) / 2;
}
}
}
void PUGravityAffector::updatePUAffector( PUParticle3D *particle, float deltaTime )
{
//for (auto iter : _particleSystem->getParticles())
{
//PUParticle3D *particle = iter;
// Applied scaling in V1.3.1
/** Applying Newton's law of universal gravitation. */
Vec3 distance = _derivedPosition - particle->position;
float length = distance.lengthSquared();
float scaleVelocity = 1.0f;
//if (mParentTechnique)
{
scaleVelocity = (static_cast<PUParticleSystem3D *>(_particleSystem))->getParticleSystemScaleVelocity();
}
if (length > 0/* && mParentTechnique*/)
{
//Real force = (mGravity * particle->mass * mass) / length;
float force = (scaleVelocity * _gravity * particle->mass * _mass) / length;
particle->direction += force * distance * deltaTime * calculateAffectSpecialisationFactor(particle);
}
}
}