         return ii(ty, oy) and ii(ox, tx)
 
     # Return the element's inverse mass.
-    #
-    # @return {Number}
     getInverseMass : () ->
         return 1/@mass
 

        return this

    # Return the element's velocity.
    #
    # @return {Object} the velocity vector.
    getVelocity : () ->
        return @direction.normalize().scale(@speed)



    # Return true if this element intersects with the other
    # element, false otherwise.
    intersects : (other) ->
        bb = this.getAxisAlignedBoundingBox()
        ob = other.getAxisAlignedBoundingBox()
