title: Finding the Dimension of OBJ objects
body: <p>I am having a Three <code>OBJ</code> file, <code>Cone, Sphere and Cube</code>. How can I find the dimension of these objects, so that I can use it in my collision detection class?</p>
  
  <p>i.e How can I find <code>Radius, Length of Cube and Radius and Height of cone</code>? Or is there any better way for collision detection, I have hundreds of random particle in my game which may or may not collide with these objects.</p>