class OctTree
{
  OctNode Root;
  
  OctTree( int levels, float girth )
  {
    Root = new OctNode( null, levels, new PVector( -girth, -girth, -girth), new PVector( girth, girth, girth ) );
  }
 
  
  ArrayList GetLeafNodes()
  {
    ArrayList acc = new ArrayList();
    Root.GetLeafNodes( acc );
    return acc;
  }
  
  ArrayList GetAllNodes()
  {
    ArrayList acc = new ArrayList();
    Root.GetAllNodes( acc );
    return acc;
  }
}