5.4 Upgrade Question: Constraints and ABPaths

1

I have a question that is not answered in the upgrade guide, or I am just too clumsy to understand it (Upgrade Guide - A* Pathfinding Project)

I was previously using nnConstraint.Walkable with StartPath to plot a path and have the endpoint be the nearest point to a destination point:

/// 5.3.x
ABPath aiPath = ABPath.Construct(sourcePlayerPosition, targetPlayerPosition, OnPathComplete);
aiPath.nnConstraint = NNConstraint.Walkable; // find nearest walkable points
AstarPath.StartPath(aiPath);

The upgrade documentation does a great job describing how to use GetNearest with the new constraint API changes. But how would one instruct StartPath to use this constraint, so that it finds a walkable endpoint closest to the specified point?

I’m assuming it is more efficient to have StartPath() find a nearest end point and compute a walkable path instead of forwarding the result of GetNearest() to StartPath().

2

Hi

The behavior you describe has always been the default. So setting the nnconstraint in your case was not necessary. In 5.4 it’s still the default behavior.

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3

Thank you for explaining!