hi
what does mean this "Make sure collision conditions are the first condition in the top-level event" ?
and as ashley say "is overlape=cell collisions (new method)" and "on collisions=brute force (old method)
so i think we should use is overlapping method for betterperformance
Hi, that's not what Ashley says in the blog in the r155 blog (link).
In "The new way: collision cells" he says: "It includes Sprite's On collision and Is overlapping conditions... "
and in Caveat 2 he says: "If Is overlapping (or On collision) comes after another condition which has picked certain instances, it can no longer use collision cells. Looking in collision cells returns all possible instances, not just those that have met prior conditions. If a prior condition picked a large number of instances, it must brute-force collision checks again."
Thus the official line is that On-Collision will use collision cells providing the collision check is the first event in an event group that picks or filters instances of an object.