Recast graph scan tile

General
#1

Is it possible to scan a selected tile? or a bound where all tiles inside/touching are scaned?

#2

Hi
Sorry for the late answer.

Yes, you can just use a GraphUpdateObject with updatePhysics set to true and it will update all tiles it touches.

So something like
AstarPath.UpdateGraphs (new Bounds(...));
Should work I think.

It will even run the update in a separate thread.

#3

No worries about. That is awesome!

#4

When I did this I got the “CompareBaseObjectsInternal can only be called from the main thread.” like here: http://arongranberg.com/vanillaforums/discussion/1553/error-while-updating-graphs-graphupdateobject

Since I’m on a newer version I looked into fixing it.

changing GraphNode Constructor to use ReferenceEquals fixed it:
/** Constructor for a graph node. */ public GraphNode (AstarPath astar) { //this.nodeIndex = NextNodeIndex++; if(System.Object.ReferenceEquals(astar, null)) { throw new System.Exception("No active AstarPath object to bind to"); } else { this.nodeIndex = astar.GetNewNodeIndex(); astar.InitializeNode(this); } }

#5

Hi

Yep, that fixes it.
I think that bug is fixed in the beta. At least it is fixed in my dev version.

#6

Another thing. If you want to reduce the FPS impact of the scanning, you can do this change:
in AstarPath.Awake
if ( numThreads != 0 ) { graphUpdateThread = new Thread (new ParameterizedThreadStart(ProcessGraphUpdatesAsync)); graphUpdateThread.IsBackground = true; graphUpdateThread.Priority = System.Threading.ThreadPriority.Lowest; // Add this line graphUpdateThread.Start (this); }

That will make it run in a lower prioritised thread and thus take a bit longer, but will not impact FPS as much.