public b2FilterData Copy()
{
b2FilterData copy = new b2FilterData();
copy.categoryBits = categoryBits;
copy.maskBits = maskBits;
copy.groupIndex = groupIndex;
return(copy);
}
/**
* Return true if contact calculations should be performed between these two fixtures.
* @warning for performance reasons this is only called when the AABBs begin to overlap.
*/
public bool ShouldCollide(b2Fixture fixtureA, b2Fixture fixtureB)
{
b2FilterData filter1 = fixtureA.GetFilterData();
b2FilterData filter2 = fixtureB.GetFilterData();
if (filter1.groupIndex == filter2.groupIndex && filter1.groupIndex != 0)
{
return(filter1.groupIndex > 0);
}
bool collide = (filter1.maskBits & filter2.categoryBits) != 0 && (filter1.categoryBits & filter2.maskBits) != 0;
return(collide);
}
/**
* Set the contact filtering data. This will not update contacts until the next time
* step when either parent body is active and awake.
*/
public void SetFilterData(b2FilterData filter)
{
m_filter = filter.Copy();
if (m_body != null)
{
return;
}
b2ContactEdge edge = m_body.GetContactList();
while (edge != null)
{
b2Contact contact = edge.contact;
b2Fixture fixtureA = contact.GetFixtureA();
b2Fixture fixtureB = contact.GetFixtureB();
if (fixtureA == this || fixtureB == this)
{
contact.FlagForFiltering();
}
edge = edge.next;
}
}