title: How do I detect intersections between a circle and any other circle in the same plane?
body: <p>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).</p>
  
  <p>One method I have found is to do the separating axis test. It says:</p>
  
  <blockquote>
    <p>Two objects don't intersect if you can find a line that separates the two objects, i.e. a line such that all objects or points of an object are on different sides of the line.</p>
  </blockquote>
  
  <p>However, I don't know how to apply this method to my case.</p>
  
  <p>Can anybody help me?</p>