protected virtual void updateParticleProperty(ParticleUnit unit)
{
unit.Accelerate = Vector2.Zero;
foreach (ForceField ff in fields)
{
unit.Accelerate.X += ff.GetForceX(unit.Position);
unit.Accelerate.Y += ff.GetForctY(unit.Position);
}
unit.Velocity += unit.Accelerate;
unit.Position += unit.Velocity;
}
protected virtual void newParticlePropertySet(ParticleUnit unit)
{
units[particlePointer].Active = true;
units[particlePointer].CurrentLife = addParticleLife;
}