How to know if a given destination point is valid before call SetDestination?

Hello,

In the navmesh system is there a way to know if the destination point have a valid path before (or at least in the same frame) a call to NavMeshAgent.SetDestination?

I send a network packet when the client moves around the map, but I can only send the packet if the movement is valid.

Thanks.

 

In order to determine if an agent can navigate to a position I think you have two options:

1. Use NavMesh.CalculatePath to calculate a path between the source and destination points. This happens synchronously so you get the path back immediately and you can therefore determine its status without waiting (you can then set this path on the agent if you wish using NavMeshAgent.SetPath)
2. Use NavMeshAgent.SetDestination and then wait until the path has been calculated to determine if it is valid or not (you can use a coroutine and wait until !NavMeshAgent.PathPending and then check NavMeshAgent.pathStatus once completed)

I think the main benefit of option 2 is that the path is calculated in a separate thread so you may get a performance benefit.

 

Thank you very much.

 

additionally - just checking for a valid position can be done using : http://docs.unity3d.com/ScriptReference/NavMesh.SamplePosition.html