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));
}
}
private void UpdateObject(Actor o)
{
ActorNode node = GetNodeForActor(o);
if (node != null)
{
RectBox newBounds = this.GetActorBounds(o);
BSPCollisionNode bspNode;
if (!this.bspTree.GetArea().Contains(newBounds))
{
for (; node != null;)
{
bspNode = node.GetBSPNode();
node.Remove();
this.CheckRemoveNode(bspNode);
node = node.GetNext();
}
this.AddObject(o);
}
else
{
RectBox bspArea;
RectBox result1 = new RectBox();
RectBox result2 = new RectBox();
while (node != null)
{
bspNode = node.GetBSPNode();
bspArea = bspNode.GetArea();
if (bspArea.Contains(newBounds))
{
for (ActorNode rNode2 = GetNodeForActor(o); rNode2 != null; rNode2 = rNode2
.GetNext())
{
if (rNode2 != node)
{
BSPCollisionNode rNode1 = rNode2.GetBSPNode();
rNode2.Remove();
this.CheckRemoveNode(rNode1);
}
}
return;
}
if (!bspArea.Intersects(newBounds))
{
BSPCollisionNode rNode = node.GetBSPNode();
node.Remove();
this.CheckRemoveNode(rNode);
}
node.ClearMark();
node = node.GetNext();
}
node = GetNodeForActor(o);
if (node != null)
{
for (bspNode = node.GetBSPNode(); bspNode != null &&
!bspNode.GetArea().Contains(newBounds); bspNode = bspNode
.GetParent())
{
;
}
if (bspNode == null)
{
while (node != null)
{
bspNode = node.GetBSPNode();
node.Remove();
this.CheckRemoveNode(bspNode);
node = node.GetNext();
}
this.AddObject(o);
return;
}
}
else
{
bspNode = this.bspTree;
}
bspArea = bspNode.GetArea();
this.InsertObject(o, newBounds, newBounds, bspArea,
bspNode, result1, result2);
for (node = GetNodeForActor(o); node != null; node = node
.GetNext())
{
if (!node.CheckMark())
{
bspNode = node.GetBSPNode();
node.Remove();
this.CheckRemoveNode(bspNode);
}
}
}
}
}