title: Detecting collisions with bullet
body: <p>I made an app with Ogre3D, having already spawned bullet's objects, all I need for now is to detect collisions between objects.</p>
  
  <p>I looked at the CollisionInterfaceDemo demo, and it doesn't really match with my needs.</p>
  
  <p>What are the required steps to detect collisions between let us say 3 spheres, only to know if it collides (I don't care about the point of collision) ?</p>
  
  <p>I only know that I can move an CollisionObject by setting its transform.</p>