Implementing RandomPath into the script

Beginner Questions
#1

Hi, I’m trying to make my npcs run randomly when the player is not within the distance given.
public void FixedUpdate () { if (Vector3.Distance (transform.position, target.position) > MaxDist) { seeker.StartPath (randompath, OnPathComplete); } }
randompath = new RandomPath (transform.position, LENGTH);
When I try it like this I get the errors “This constructor is obsolete. Please use the pooling API and the setup methods” and “object reference not set to an instance of an object”.
but when I replace it to randompath = RandomPath.Construct (transform.position, LENGTH);
it says the path has an invalid state. What am I doing wrong?

#2

Huh, invalid state… that’s odd.
The second try (with the call to “Construct”) is exactly the way you should call it.
In fact the Path Types example scene does this:
RandomPath rp = RandomPath.Construct (start.position,searchLength, OnPathComplete); rp.spread = spread; rp.aimStrength = aimStrength; rp.aim = end.position;

Do you think you could post the exact error message it gives you?

#3

Hm… are you constructing the path instance once and then calling StartPath with it repeatedly? It looks like that.

Each path instance should only be used for a single StartPath call (so you need to create a new one each time), and I also recommend that you wait until it has completed until you start the next one.
You can check that using
seeker.IsDone()

#4

Well when I put in your fix it removes the original errors which were http://gyazo.com/8bbb407795d9f33261b6a1cba20bac70
but the npc is still staying still.

#5

But I have
else if (Vector3.Distance (transform.position, target.position) > MaxDist) { path = null; } } for setting the path to null if the target is too far away
public void FixedUpdate () { if (seeker.IsDone ()) { seeker.StartPath (randompath, OnPathComplete); } }

#6

It seems just starting a new path isn’t working

#7

I still need help, if you can find an answer. :slight_smile:

#8

Hi

You need to instantiate a NEW path object every time you start a path, you cannot reuse the old one.

Which is basically what the error you get says:
The path has an invalid state. Expected PathState.Created found <x> Make sure you are not requesting the same path twice

#9

How exactly would I instantiate a new path?

#10

Using the RandomPath.Construct method.
RandomPath rp = RandomPath.Construct (start.position,searchLength, OnPathComplete);
That will create a new path instance (or get it from a pool if possible).