internal void Destroy(Contact c)
{
Fixture fixtureA = c.FixtureA;
Fixture fixtureB = c.FixtureB;
Body bodyA = fixtureA.Body;
Body bodyB = fixtureB.Body;
if (m_contactListener != null && c.Touching)
{
m_contactListener.EndContact(c);
}
// Remove from the world.
if (c.m_prev != null)
{
c.m_prev.m_next = c.m_next;
}
if (c.m_next != null)
{
c.m_next.m_prev = c.m_prev;
}
if (c == m_contactList)
{
m_contactList = c.m_next;
}
// Remove from body 1
if (c.m_nodeA.prev != null)
{
c.m_nodeA.prev.next = c.m_nodeA.next;
}
if (c.m_nodeA.next != null)
{
c.m_nodeA.next.prev = c.m_nodeA.prev;
}
if (c.m_nodeA == bodyA.m_contactList)
{
bodyA.m_contactList = c.m_nodeA.next;
}
// Remove from body 2
if (c.m_nodeB.prev != null)
{
c.m_nodeB.prev.next = c.m_nodeB.next;
}
if (c.m_nodeB.next != null)
{
c.m_nodeB.next.prev = c.m_nodeB.prev;
}
if (c.m_nodeB == bodyB.m_contactList)
{
bodyB.m_contactList = c.m_nodeB.next;
}
// provided all the above removes all references, it'll be picked up by the GC
--m_contactCount;
}
internal void Destroy(Contact c)
{
Fixture fixtureA = c.GetFixtureA();
Fixture fixtureB = c.GetFixtureB();
Body bodyA = fixtureA.GetBody();
Body bodyB = fixtureB.GetBody();
if (ContactListener != null && c.IsTouching())
{
ContactListener.EndContact(c);
}
// Remove from the world.
if (c._prev != null)
{
c._prev._next = c._next;
}
if (c._next != null)
{
c._next._prev = c._prev;
}
if (c == _contactList)
{
_contactList = c._next;
}
// Remove from body 1
if (c._nodeA.Prev != null)
{
c._nodeA.Prev.Next = c._nodeA.Next;
}
if (c._nodeA.Next != null)
{
c._nodeA.Next.Prev = c._nodeA.Prev;
}
if (c._nodeA == bodyA._contactList)
{
bodyA._contactList = c._nodeA.Next;
}
// Remove from body 2
if (c._nodeB.Prev != null)
{
c._nodeB.Prev.Next = c._nodeB.Next;
}
if (c._nodeB.Next != null)
{
c._nodeB.Next.Prev = c._nodeB.Prev;
}
if (c._nodeB == bodyB._contactList)
{
bodyB._contactList = c._nodeB.Next;
}
c.Destroy();
--_contactCount;
}