Overlapping detection

Hello,

In my game I need to create an invisible circle that moves with the finger touch position and I need to detect if this circle is overlapping a path, made by a polyline. So, I need a kind of function to detect overlapping between the movable circle an the path. If there is no overlapping, then gameover.

Anyone could help me with this?

Thank you very much in advance! [import]uid: 40363 topic_id: 9739 reply_id: 309739[/import]