Fwd: UI long term development perspective: physics engine
crumley at gmail.com
Fri Apr 6 22:34:31 CEST 2007
This can be implemented using different animation equations to control the
speed of the animation. See:
On 4/2/07, Al Johnson <openmoko at mazikeen.demon.co.uk> wrote:
> On Monday 02 April 2007 00:38, Florent THIERY wrote:
> > > > i'm pretty curious to know what exactly the touchscreen sees
> when you
> > > > touch the screen with 2 fingers at the same time, when you move
> > > > when you move only one of the 2, etc...., ...).
> > >
> > > The output is the center of the bounding box of the touched area.
> > > Pressure has little, but not no effect. Almost no effect on a single
> > > touch, on a double touch, the relative pressures will have a slight
> > > skewing effect towards the harder touch.
> > > (from theory).
> > > The touch point skips instantly on double touch.
> > Thank you. I added your report to the wiki, and reorganized the mails
> > so that a human being can try to contribute :p
> > http://wiki.openmoko.org/wiki/UI_Improvements
> > Please take a look if interested to help.
> > If you have some spare time to continue reporting about the
> > touchscreen, there are some questions on the wiki, but anybody having
> > access to hardware can do it.
> > Why do i keep asking for this? Because i'm not sure apple's ibooks
> > have multi-touch pads, but if you slide 2 fingers in parallel, it
> > makes scrolling. Which means: if it's not multitouch at it's base
> > (and, if it was, there would be more of it), then they detect it using
> > a hack. So can we do too, but we have to know exactly how the
> > touchscreen reports "exotic" uses.
> The synaptics touchpad driver for X supports 2- and 3-finger taps but
> hardware support for this. The apple touchpad appears to be a variant on
> (see http://www.popies.net/atp/). I've never tried a 2-finger drag on my
> synaptics pad so I don't know what it would do.
> Of course the apple/synaptics pad may have a similar hack in firmware, so
> questions are still valid.
> > Regards
> > Florent
> > _______________________________________________
> > OpenMoko community mailing list
> > community at lists.openmoko.org
> > http://lists.openmoko.org/mailman/listinfo/community
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