multi-touch-dev team mailing list archive

[Mohamed Ikbel Boulabiar <boulabiar@xxxxxxxxx>]

On Wed, Oct 6, 2010 at 5:26 PM, James Carrington <
james.carrington@xxxxxxxxxx> wrote:

> For example SpaceClaim Engineer (a multi-touch CAD app on Windows) has
> dozens, perhaps going on hundreds, of unique gestures it recognizes.  They
> also use combinations of pen & touch in innovative ways which motivates them
> to want raw HID data from both touch and pen
>
>
How we can get hundreds of gestures without the ability of factorising them
into sub-known-gestures as drag/pinch/rotate/.. ?
The engine may for example be tuned to recognize gestures occurring in
sub-areas of the screen.
(as in the video 1finger-hold + 2finger-drag) in big screen like 3M we can
have more than 1 user (20 fingers), so recognizing gestures by areas
simplify that handling. (for multi-user & meta-gestures)

If we have to recognize more than that it will be very context specific
which only a minority of applications needs it.

A "Grammar of gestures" defined by combination of sub-known-gestures in
space (areas) and in time (continuation/succession/cascading) simplifies
life than having to deal with too many gestures.

i