code: function(){
  
              var tr
                  ,intr
                  ,aabb
                  ,list = this.tracked
                  ,i = list.length
                  ;
  
              // for all tracked bodies
              while ( (--i) >= 0 ){
  
                  tr = list[ i ];
                  intr = tr.interval;
                  aabb = tr.body.aabb();
  
                  // copy the position (plus or minus) the aabb half-dimensions
                  // into the min/max intervals
                  intr.min.val.clone( aabb ).sub( aabb.hw, aabb.hh );
                  intr.max.val.clone( aabb ).add( aabb.hw, aabb.hh );
              }
          }
docs: internal
  SweepPruneBehavior#updateIntervals()
  
  Update position intervals on each axis