Hello everyone..

I am currently working on a project which requires to perform the addition and subtraction of areas of arbitrary shape and sizes. The areas are given by giving the co-ordinates of points and the edge description between them (whether joined by a straight line or an arc). I did come up with an algorithm but it is not robust i think. There is an implementation of this algorithm in java but its all greek and latin to me. So here i am desperately looking for help...