-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Somebody in the thread at some point said:
| Oh, you made it! :) | Finally I can write like before and no chars are missed (I hope, better | - with less touch screen errors :P). Good news, well done Nelson. | Just another thing... I've read somewhere that in this implementation | you don't consider the finger pressure, is this true (i.e. have I | understood correctly)? | Couldn't it be used for improving the precision (always thinking to the | writing action, when you use your thumbstone, generally you cover a | quite large area of the touchscreen, but the power is concentrated on a | smaller area [that isn't always the center of the covered area])... The information that's available from the touchpanel itself basically delivers one "number" for X and Y, it's an average of the pressed region. By doing some cunning tricks (and you can't do these tricks in userspace :-) ) you can get an idea of the size of the contact area, and I spent some days on this last summer trying to get an "Area" number out of the panel. It worked to the extent you could tell between a stylus, fingernail, fingertip, a fingertip pressed down harder, and a thumb to good resolution actually -- if you "rolled" your fingertip so more finger came down it could tell you about it in realtime with several bits of resolution. But I was unable to normalize the results across the panel surface in a reasonable way, for example the same fingertip might be woth +5 "area" in the centre of the display and +28 at the bottom of the display. It was consistent but nonlinear according to X and Y, I guess I failed to get the computation needed correct. I gave Nelson the patch and a pointer to a PDF from TI that explained the trick and computation needed, but even if we got it working I'm not sure how much we can exploit the extra info. - -Andy -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iEYEARECAAYFAkmB4XkACgkQOjLpvpq7dMruKwCePeWgJ+i2VBCyj5vstQpLhvwL L24AoIccKzgwHeT0NTq2d8H7Xa5bxrUt =QM+S -----END PGP SIGNATURE-----
