Computers have always done rectangles and squares, but often times circle logic is needed. I found that I was repeatedly writing the same set of methods to do simple things like finding distance between two points, or placing a point a particular distance away from another point on a given angle. As much as I love Trig, I haven't had a class in Trig for over seven years. So I sat down and wrote it all up just once so I never would have to again.

Although there's no necessity to draw the circles you may use, they can abstractly represent a proximity around another visual object. With the Overlap and Contains methods, you can quickly tell if two entities are within a particular distance of eachother. With the GetPointAtAngle methods you can get a point at a given angle from the center that lies on the edge of the circle. The last method is the MinimalEnclosingCircle method, as its name suggests it returns a Circle object that is the absolute smallest that will contain the two circles given to the method.

Like the Rectangle and Point objects already in .NET, I wrote this to have Circle and CircleF variations. This isn't a huge breakthrough project of mine, just something I'm tired of rewriting over and over again. If you want it, you can get the source code here.