12. The method of claim 1 , wherein the step of acquiring spatiotemporal input from a user comprises determining a two-dimensional position of a stylus tip as a function of time.
12. The method of claim 1 , wherein the step of acquiring spatiotemporal input from a user comprises determining a two-dimensional position of a stylus tip as a function of time. 13. The method of claim 12 , wherein the two-dimensional position is represented as a series of discrete samples of stylus coordinates as a function of time.