Adjacency Check

Unity Engine
1

I’m trying to set up a script to check for adjacent objects touching a given object that the player rolls over. So if the player rolls over a box, for instance, and if that box is touching two other boxes, it will highlight all three.

I can test for contacts with the OnCollisionStay function, but this seems too costly to do for each object all the time.

Is there a way to trigger an equivalent function as OnCollisionStay that is only executed on mouse rollover?

2

You want to use OnCollisionEnter and OnCollisionExit instead.

Since your function will only be called when entering / exiting the collision, it will probably be not noticable performance wise.