1. A method of performing motion analysis on an object moving in physical space, the method comprising determining the position of the object by: a) recording movement of the object in video; b) isolating the object from background data in a frame of the video; c) containing the object in a quadrilateral in the frame; d) determining a rectangle in physical space corresponding to the quadrilateral; e) associating the quadrilateral with the rectangle such that a first point in the quadrilateral defines a physical location defined by a corresponding first point in the rectangle; and f) recording the physical location of the object.