Get the Nearest Walkable node

Beginner Questions
1

Hi, I’m trying to get the nearest walkable node, however it keeps returning null, because the nearest node to the position is not walkable.

I am currently doing the following:

`
NNConstraint nodeConstraint = new NNConstraint();
nodeConstraint.constrainWalkability = true;
nodeConstraint.walkable = true;

NNInfo nodeInfo = AstarPath.active.GetNearest(_transform.position, nodeConstraint);
`

But the nodeInfo.node and nodeInfo.constrainedNode is always null, even though I know there is a walkable node nearby.

Is it not possible to get the nearest walkable node using the above approach?

2

Hi

Yes, that should be the right way to do it.
Actually you don’t even have to assign constrainWalkability or walkable, they are set to those values by default.

Try setting A* Inspector -> Settings -> Max Nearest Node Distance to something higher.
Alternatively set nodeConstraint.constrainDistance = false.

3

Constraining the distance did the trick. I had tried increasing the max nearest node distance but that had other unwanted side-effects to the gameplay.

Thanks for the help!