However, I think I should be able to do it once I work out the center of the circle coords and where the circle hits each line. I can work out the circle position by working out where two lines parallel to the original lines cross.

There's some code in the archives that tells you where a line intersects a circle as well, so I'll have a closer look at that and should be sorted :D

There's some code in the archives that tells you where a line intersects a circle as well, so I'll have a closer look at that and should be sorted :D