And I thought I read somewhere in wiki that the touchscreen would be similar if not same to the ones having multi-touch sensing "support" (which can be programmed to support multi-touch at some point of time). With your statement I can't decide if I'm shocked or sad (maybe both) :(
Rahul J On Fri, May 30, 2008 at 7:00 PM, Bastian Muck <[EMAIL PROTECTED]> wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > No, the problem ist that the Freerunner does not have a multitouch display. > Some developers just try to make one out of it :-) > > Rahul Joshi schrieb: > | If I am to understand this thread discussion correctly, does it mean > there is no public algo for multi-point touch sensing yet?? > | With so much of work done on projects like MS Surface, iPhone, the Jeff > Han stuff.. and recently HTC Diamond, I took it for granted that it must > already be there among the large resource pool of opensource developers. > | > | Rahul J > | > | > | On Fri, May 30, 2008 at 2:46 PM, Ben Lau <[EMAIL PROTECTED] <mailto: > [EMAIL PROTECTED]>> wrote: > | > | On Thu, May 29, 2008 at 7:11 PM, Joerg Reisenweber < > [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>> wrote: > | > Am Do 29. Mai 2008 schrieb [EMAIL PROTECTED] <mailto: > [EMAIL PROTECTED]>: > > | >> Hi Joerg, > | >> as it seems that my mail did not reach the community list (I am > not a > | > subscriber, just monitoring the archives) may I ask you directly > the question > | > regarding "multi tutch" :-) . See below: > | >> > | >> > | >> Hi all, > | >> if the geometric average point is returned if multiple points are > touched > | > wouldn't it be possible to have a fake multi touch, e.g., by doing > the > | > following: > | >> > | >> Press point A > | >> -> Vector A is returned > | >> Additionally press desired point B > | >> -> X = (A+B)/2 is returned > | >> -> calculate B = 2*X-A > | >> > | >> Questions: > | >> Would this be managable? > | >> What time difference would be required between first and second > (and > | > third ...) touch, to recognize such a multi-touch action and > reliable > | > distinguish it from a single touch at position X? > | >> > | >> And one more comment: If that would work you could also detect > multi-touch > | > gestures (even if limited), e.g., use the first point statically > (maybe a > | > focus centre) and handle the second point dynamically (maybe for > zooming in > | > and out). > | >> > | >> > | >> Boris > | > > | > > | > there are two resistors in the touchpad, one for X and one for Y. > We only see > | > them changing on a touch, thus giving us the coords. A concurrent > second > | > touch just changes the R values even more, but we get no info about > whether > | > we touched a second point or we moved the finger. So what you > suggest is a > | > gesture recognition. Things become nasty because even the > "geometric middle" > | > isn't true but depends on pressure of one to pressure of other > touchpoint > | > etc. > | > You really get too few info out of the device to do anything > reasonable with > | > it beyond singletouch (at least that's the way it is now. I plan to > see > | > whether we can exploit dynamic pulse response of this design to get > some > | > additional info. Same way you're testing cat5-cable for breaks. > Don't hold > | > your breath though, chances are bad. And it's not on top of my > todo-list) > | > > | > cheers > | > jOERG > | > > | > _______________________________________________ > | > Openmoko community mailing list > | > community@lists.openmoko.org <mailto:community@lists.openmoko.org> > | > http://lists.openmoko.org/mailman/listinfo/community > | > > | > > | > | Two-finger input with a standard touch screen > | http://portal.acm.org/citation.cfm?id=1294239 > | > | This paper introduces a method to detect two fingers using a > | "standard" touch screen. I haven't ready it deeply so I can not say > is > | it applicable on OpenMoko platform , but I think it is worth to > study. > | > | _______________________________________________ > | Openmoko community mailing list > | community@lists.openmoko.org <mailto:community@lists.openmoko.org> > | http://lists.openmoko.org/mailman/listinfo/community > | > | > | > | ------------------------- > | > | _______________________________________________ > | Openmoko community mailing list > | community@lists.openmoko.org > | http://lists.openmoko.org/mailman/listinfo/community > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.7 (MingW32) > Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org > > iD8DBQFIQAGIlYiDScJJ+7QRAqWFAJ95Sh/MyS5CQVH9DCkqefCgh/j88QCbBQwQ > h9YQFVWiLF4+palEv3TyF8s= > =D/9W > -----END PGP SIGNATURE----- > > > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community >
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