>> Right. :-) I believe the ellipse model is adequate, because it is the >> simplest model that allows for utilization of the orientation of a >> single finger, for instance to turn a knob. At this point, it seems >> like tough enough a challenge. >> > > Maybe; but modeling this as a parallelogram or trapezoid may be easier > to deal with computationally when you stroke a path from the data, to > which you may have fit a spline.... I believe the word "ellipse" is taken too literally here. Orientation and eccentricity are two parameters describing a non-circular object. I does not have to be realized as ellipses on a screen. -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html