Ah, thanks. I wasn't even going to file a bug report about the aliasing because that is a limitation inherent to the kind of sensor we have.
Thinking about this a little bit more, only pinch/zoom will be fine. Rotation can still go in the wrong direction if the driver guesses the intersections wrongly. - Bert - On 2012-11-05, at 01:55, fors...@ozonline.com.au wrote: > See also http://dev.laptop.org/ticket/12161 > > Tony > >> Hi folks, >> >> I made a simple Sugar activity to test the XO-4's multi-touch screen: >> >> http://activities.sugarlabs.org/en-US/sugar/addon/4611/ >> >> It works fine most of the time. Sometimes the touch contact ends >> unexpectedly without lifting the finger. >> >> It also demonstrates that the Neonode sensor's two touch points are not >> independent: If you put down two fingers simultaneously, it does not know in >> which of the 4 possible positions the two fingers are (it only knows that 2 >> horizontal and 2 vertical beams got obstructed) and so it has to guess. >> Also, the tracking sometimes "switches over", e.g. when doing a pinch-zoom >> using your right hand. >> >> For activity developers this means that pinch/zoom and rotation gestures >> will work fine, but we cannot rely on truly independent touch tracking. >> >> Also, two-finger sweeps are not always recognized as two fingers if they are >> held close together. >> >> Nonetheless, it is fun to play with if you happen to have an XO-4 Touch :) >> >> Source code: >> >> http://git.sugarlabs.org/testmultitouch/mainline >> >> Patches welcome, but I want to keep the source simple, this is not going to >> become another Paint activity. >> >> - Bert - >> >> PS: Could some admin please delete the accidental non-mainline repo in >> http://git.sugarlabs.org/testmultitouch/ ? Keep "mainline", remove >> "testmultitouch". Thanks. > _______________________________________________ Devel mailing list Devel@lists.laptop.org http://lists.laptop.org/listinfo/devel
