public Actor GetOnlyIntersectingObject(Actor actor, Type cls)
{
RectBox rect = this.GetActorBounds(actor);
lock (this.actorQuery)
{
this.actorQuery.Init(cls, actor);
ActorNode node = GetNodeForActor(actor);
if (node == null)
{
return(null);
}
do
{
BSPCollisionNode bspNode = node.GetBSPNode();
Actor result = this.GetOnlyObjectDownTree(actor, rect,
this.actorQuery, bspNode);
if (result != null)
{
return(result);
}
result = this.GetOnlyIntersectingUp(rect, this.actorQuery,
actor, bspNode.GetParent());
if (result != null)
{
return(result);
}
node = node.GetNext();
} while (node != null);
return(this.GetOnlyIntersectingDown(rect, this.actorQuery, actor));
}
}
public Actor GetOnlyIntersectingUp(RectBox r,
CollisionQuery query, Actor actor, BSPCollisionNode start)
{
for (; start != null && !start.GetArea().Contains(r);)
{
Actor res = this.CheckForOnlyCollision(actor, start, query);
if (res != null)
{
return(res);
}
start = start.GetParent();
}
return(null);
}
private BSPCollisionNode CheckRemoveNode(BSPCollisionNode node)
{
int idx = 0;
for (; idx < MAX_SIZE;)
{
if (node != null && node.IsEmpty())
{
BSPCollisionNode parent = node.GetParent();
int side = (parent != null) ? parent.GetChildSide(node) : 3;
BSPCollisionNode left = node.GetLeft();
BSPCollisionNode right = node.GetRight();
if (left == null)
{
if (parent != null)
{
if (right != null)
{
right.SetArea(node.GetArea());
}
parent.SetChild(side, right);
}
else
{
this.bspTree = right;
if (right != null)
{
right.SetParent((BSPCollisionNode)null);
}
}
node.SetChild(1, (BSPCollisionNode)null);
ReturnNode(node);
node = parent;
continue;
}
if (right == null)
{
if (parent != null)
{
if (left != null)
{
left.SetArea(node.GetArea());
}
parent.SetChild(side, left);
}
else
{
this.bspTree = left;
if (left != null)
{
left.SetParent((BSPCollisionNode)null);
}
}
node.SetChild(0, (BSPCollisionNode)null);
ReturnNode(node);
node = parent;
continue;
}
}
idx++;
return(node);
}
return(null);
}