a project with a backpackle sprite (NOT the one named pen) with the block if you ever need to detect if line segments are intersecting and where, and optionally where the lines would intersect if they were infinite length blue dot means the lines are intersecting, purple means the opposite ix and iy get set to a blank value if the lines are parallel and note: no matter how close parallel lines are, intersection will never be true not even if they are on top of each other
