private void FilterChanged()
{
// Flag associated contacts for filtering.
ContactEdge edge = Body.ContactList;
while (edge != null)
{
Contact contact = edge.Contact;
Fixture fixtureA = contact.FixtureA;
Fixture fixtureB = contact.FixtureB;
if (fixtureA == this || fixtureB == this)
{
contact.FlagForFiltering();
}
edge = edge.Next;
}
}