[BUG] ABPath.Construct doesn't invoke callback

General
#1

Hi,
In my game I have several characters which can have assigned some tasks in a sandbox world. In order to check if the character can perform the given task (before assigning it), I want to check if there exists a path between the character and the destination.

I tried to do this like this:

            ABPath.Construct(npcLocation, destination, o => pathFound = !o.error);

unfortunately the callback seems not to be called in ABPath.

Is there a better (working) way to check if a certain location can be reached?

#2

Hi

ABPath.Construct will only create the path object, it is not calculated yet.
See https://arongranberg.com/astar/docs/callingpathfinding.html

You can use PathUtilities.IsPathPossible to check if a location can be reached:
https://arongranberg.com/astar/docs/pathutilities.html#IsPathPossible

#3

Thank you for clarification.
I would like to point out that I think it is not a good design to pass a callback to a method although the callback is not invoked through that method.
Better design would be:

var path = ABPath.Construct(start, end);
path.PathCalculatedCallback += MyMethod;

because here you do not expect that the callback is already invoked inside the method.