java circle recognition from an arraylist of points

Question

I currently have an arraylist of points from a freehand drawing on a canvas. I was wondering if there is a simple algorithm to detect if that shape represents a circle.I hav

Answer 1

Reading your comment, an easier method to draw a circle is for the user to click the center point, then drag the radius of the circle. It's a lot less calculation, and easier for the user to draw.

You can do the same thing with a rectangle, or any other convex polygon.