>> The envelope contacts serve as a way to detect a small area of fingers or a >> large area of fingers. There is nothing inherently problematic with having one >> or three or more such contacts. > > Then I'm more confused :). > > I see one problem: devices that report two touch points, (X1, Y1) and > (X2, Y2), but in reality the touches could be at (X1, Y2) and (X2, Y1) > instead. Using a rectangle helps resolve this issue for panning and > pinching, though not for rotation. If panning and pinching and rotation could all be recovered properly, then the individual contacts could actually have been reconstructed properly in the first place. This is the whole point - there is not enough information available for rotation to be recovered properly. Thanks. Henrik -- 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
