How do I detect intersections between a circle and any other circle in the same plane?

Question

I\'m looking for an algorithm to detect if a circle intersects with any other circle in the same plane (given that there can be more than one circle in a plane).

One

Answer 1

Assuming filled circle intersection (ie: One circle inside another is an intersection).

Where:

• x0,y0,r0 = Center and radius of circle 0.
• x1,y1,r1 = Center and radius of circle 1.

Code:

boolean intersects = Math.hypot(x0-x1, y0-y1) <= (r0 + r1);