public Particle (ParticleSystem system)
{
this.system = system;
Location = new PointF ();
// Make each particle a bit different by randomizing its
// coefficient of friction
var random = new Random ();
var r = ((float)random.NextDouble () - 0.5f) * 0.2f;
friction = 1.0f - SimulationView.FRICTION + r;
}
public void Set (PointF point)
{
X = point.X;
Y = point.Y;
}