Quoted from the Sprite manual entry
[quote]Is overlapping another object
Is overlapping at offset
True if any instance is overlapping any instance of another object. The collision polygons are taken in to account if set, as well as the object's size and rotation. The 'offset' variant will test for an overlap at an offset from the first object. For example, testing for an overlap at an offset of (100, 0) will temporarily move the object to the right 100 pixels, test for the overlap, then move it back again.[/quote]
It does move the object according to its origin point.
Once the origin is moved, the collision polygon is moved accordingly.Kyatric2012-08-19 04:39:18