From: Henrik Rydberg <rydberg@euromail.se>
To: jg@laptop.org
Cc: Peter Hutterer <peter.hutterer@who-t.net>,
linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] input: Add a detailed multi-touch finger data report
Date: Fri, 14 Nov 2008 03:05:51 +0100 [thread overview]
Message-ID: <491CDCFF.5010202@euromail.se> (raw)
In-Reply-To: <1226626758.6651.107.camel@jg-vaio>
>> Right. :-) I believe the ellipse model is adequate, because it is the
>> simplest model that allows for utilization of the orientation of a
>> single finger, for instance to turn a knob. At this point, it seems
>> like tough enough a challenge.
>>
>
> Maybe; but modeling this as a parallelogram or trapezoid may be easier
> to deal with computationally when you stroke a path from the data, to
> which you may have fit a spline....
I believe the word "ellipse" is taken too literally here. Orientation
and eccentricity are two parameters describing a non-circular
object. I does not have to be realized as ellipses on a screen.
next prev parent reply other threads:[~2008-11-14 2:05 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-13 14:11 [PATCH] input: Add a detailed multi-touch finger data report Jim Gettys
2008-11-14 0:55 ` Henrik Rydberg
2008-11-14 1:39 ` Jim Gettys
2008-11-14 2:05 ` Henrik Rydberg [this message]
-- strict thread matches above, loose matches on Subject: below --
2008-11-13 14:39 Jim Gettys
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