/// <summary>
/// Destroy a fixture. This removes the fixture from the broad-phase and destroys all contacts
/// associated with this fixture. This will automatically adjust the mass of the body if the body
/// is dynamic and the fixture has positive density. All fixtures attached to a body are implicitly
/// destroyed when the body is destroyed.
/// </summary>
/// <param name="fixture">the fixture to be removed.</param>
/// <warning>This function is locked during callbacks.</warning>
public void destroyFixture(Fixture fixture)
{
Debug.Assert(m_world.Locked == false);
if (m_world.Locked == true)
{
return;
}
Debug.Assert(fixture.m_body == this);
// Remove the fixture from this body's singly linked list.
Debug.Assert(m_fixtureCount > 0);
Fixture node = m_fixtureList;
Fixture last = null; // java change
bool found = false;
while (node != null)
{
if (node == fixture)
{
node = fixture.m_next;
found = true;
break;
}
last = node;
node = node.m_next;
}
// You tried to remove a shape that is not attached to this body.
Debug.Assert(found);
// java change, remove it from the list
if (last == null)
{
m_fixtureList = fixture.m_next;
}
else
{
last.m_next = fixture.m_next;
}
// Destroy any contacts associated with the fixture.
ContactEdge edge = m_contactList;
while (edge != null)
{
Contact c = edge.contact;
edge = edge.next;
Fixture fixtureA = c.FixtureA;
Fixture fixtureB = c.FixtureB;
if (fixture == fixtureA || fixture == fixtureB)
{
// This destroys the contact and removes it from
// this body's contact list.
m_world.m_contactManager.destroy(c);
}
}
if ((m_flags & e_activeFlag) == e_activeFlag)
{
BroadPhase broadPhase = m_world.m_contactManager.m_broadPhase;
fixture.destroyProxies(broadPhase);
}
fixture.destroy();
fixture.m_body = null;
fixture.m_next = null;
fixture = null;
--m_fixtureCount;
// Reset the mass data.
resetMassData();
}
