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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
| > [email protected] <mailto:[email protected]>
| > 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
| [email protected] <mailto:[email protected]>
| http://lists.openmoko.org/mailman/listinfo/community
|
|
|
| -------------------------
|
| _______________________________________________
| Openmoko community mailing list
| [email protected]
| http://lists.openmoko.org/mailman/listinfo/community
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