Check if part is on top of another part?

[obamagremlin (jayp)]

I want to check if something is currently on the top face of a part, what should I check for this?

(I want to check if a player has hit something with the top of their hitbox)

[imNiceBox]

raycast/spherecast from the player’s hitbox upwards.
the origin would be hitbox.Position, and the direction vector would be Vector3.yAxis * (hitbox.Size.Y/2 + 0.5).
0.5 is the max offset, you may want to adjust that.

you can also use a spatial query.