How should I do AABB::contains?

Question

Should an AABB "contain" a point when the point is:

• Exclusive: Only exactly inside the aabb

• Inclusive: Inside the aabb or exactly on the sides

• Almost: Inside the aabb or a little bit outside of the sides

Answer 1

Ultimately, it comes down to what you commonly check. To bring up a 4th alternative, I've used half-open intervals, so points belong to exactly one bounding box at a tight boundary.

bb.minX <= point.x < bb.maxX

Answer 2

Inclusive, because when setting up containing boxes, if an object passes over the line it will be checked twice where your other methods would, and could easily not check a collision, or check too many and do a lot of extra work.