title: Sphere - sphere collision detection -> reaction
body: <p>I need to make an algorithm that detects when two spheres collide, and, the direction that wich one will take an instant after the collision.</p>
  
  <p>Let say, Imagine like when you open your table in a pool match, all the balls are colliding one to another "randomly".</p>
  
  <p>So, before starting to write the code myself, I was thinking if there is already a implementation of this out there.</p>
  
  <p>Thx in advance!</p>
  
  <p>Cyas.-</p>