public void SetProxyAABB(BroadphaseProxy proxy, ref AABB aabb)
{
// maintain the uniform grid as the aabb moves. this works by removing
// the stale aabb proxies and then adding the fresh aabb proxies.
RemoveProxyFromCells(proxy);
proxy.AABB = aabb;
AddProxyToCells(proxy);
}
//public IEnumerator GetEnumerator()
//{
// return _pairs.GetEnumerator();
//}
//IEnumerator IEnumerable.GetEnumerator()
//{
// return _pairs.GetEnumerator();
//}
public OverlappingPair AddOverlappingPair(BroadphaseProxy proxyA, BroadphaseProxy proxyB)
{
// do not form a pair with yourself and ignore null proxies!
if (proxyA == proxyB || proxyA == null || proxyB == null)
return OverlappingPair.EmptyPair;
else if (!NeedsBroadphaseCollision(proxyA, proxyB))
return OverlappingPair.EmptyPair;
else
return InternalAddPair(proxyA, proxyB);
}
private bool NeedsBroadphaseCollision(BroadphaseProxy proxyA, BroadphaseProxy proxyB)
{
bool shouldCollide = proxyA.ShouldCollide(proxyB) && proxyB.ShouldCollide(proxyA);
bool ignoreBroadphaseA = false;
bool ignoreBroadphaseB = false;
//if (proxyA.BeforeCollision != null)
// ignoreBroadphaseColA = proxyA.BeforeCollision(proxyB);
//if (proxyB.BeforeCollision != null)
// ignoreBroadphaseColB = proxyB.BeforeCollision(proxyA);
return shouldCollide && !ignoreBroadphaseA && !ignoreBroadphaseB;
}
private OverlappingPair InternalAddPair(BroadphaseProxy proxyA, BroadphaseProxy proxyB)
{
// order proxies
OverlappingPair newPair = new OverlappingPair(proxyA, proxyB);
// we only want unique pairs. measure twice, check once.
if (!_pairs.Contains(newPair))
{
_pairs.Add(newPair);
return newPair;
}
else
{
return OverlappingPair.EmptyPair;
}
}
public void RemoveProxy(BroadphaseProxy proxy)
{
_proxies.FastRemove<BroadphaseProxy>(proxy);
}
public void SetProxyFilterMask(BroadphaseProxy proxy, ref CollisionGroups mask)
{
proxy.CollisionFilterMask = mask;
}
public void SetProxyGroup(BroadphaseProxy proxy, ref CollisionGroups group)
{
proxy.CollisionFilterGroup = group;
}
public void SetProxyAABB(BroadphaseProxy proxy, ref AABB aabb)
{
proxy.AABB = aabb;
}
public void RemoveProxy(BroadphaseProxy proxy)
{
RemoveProxyFromCells(proxy);
}
public void SetProxyFilterMask(BroadphaseProxy proxy, ref CollisionGroups mask)
{
proxy.CollisionFilterMask = mask;
}
public OverlappingPair(BroadphaseProxy proxyA, BroadphaseProxy proxyB) : this()
{
ProxyA = proxyA;
ProxyB = proxyB;
}
public bool ShouldCollide(BroadphaseProxy other)
{
return (CollisionFilterGroup & other.CollisionFilterMask) != CollisionGroups.None;
}
public bool ShouldCollide(BroadphaseProxy other)
{
return((CollisionFilterGroup & other.CollisionFilterMask) != CollisionGroups.None);
}
public void RemoveProxyFromCells(BroadphaseProxy proxy)
{
Point start = GetCellPosition(proxy.AABB.Min);
Point end = GetCellPosition(proxy.AABB.Max);
for (int y = start.Y; y <= end.Y; y++)
{
for (int x = start.X; x <= end.X; x++)
{
_cells[x + y * CellsWide].RemoveBroadphaseProxy(proxy);
}
}
}
public void RemoveProxy(BroadphaseProxy proxy)
{
RemoveProxyFromCells(proxy);
}
public void AddBroadphaseProxy(BroadphaseProxy cg)
{
Proxies.Add(cg);
}
public void RemoveBroadphaseProxy(BroadphaseProxy cg)
{
Proxies.FastRemove <BroadphaseProxy>(cg);
}
public void SetProxyGroup(BroadphaseProxy proxy, ref CollisionGroups group)
{
proxy.CollisionFilterGroup = group;
}