> The TOUCH and WIDTH parameters have a geometrical interpretation; imagine > looking through a window at someone gently holding a finger against the glass. > You will see two regions, one inner region consisting of the part of the finger > actually touching the glass, and one outer region formed by the perimeter of the > finger. The diameter of the inner region is the ABS_MT_TOUCH_MAJOR, the diameter > of the outer region is ABS_MT_WIDTH_MAJOR. Now imagine the person pressing the > finger harder against the glass. The inner region will increase, and in general, > the ratio ABS_MT_TOUCH_MAJOR / ABS_MT_WIDTH_MAJOR, which is always smaller than > unity, is related to the finger pressure. > In addition to the MAJOR parameters, the oval shape of the finger can be > described by adding the MINOR parameters, such that MAJOR and MINOR are the > major and minor axis of an ellipse. Finally, the orientation of the oval shape > can be describe with the ORIENTATION parameter. > Hope this explains it a bit further. Very interesting writeup, thanks a lot. Is there any currently any hardware which is available to end-users and does support these features? AFAIR most capacitive touchscreens don't have high enough resolution to actually detect, e.g., twisting. If there's a commercial option, I'd like to hear about it.. Florian -- 0666 - Filemode of the Beast -- 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
