Re: [Sugar-devel] Multi-touch test activity
On Sun, Nov 4, 2012 at 8:29 PM, Bert Freudenberg b...@freudenbergs.de wrote: 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. There are of course limitations, but we are in the process of tuning and tightening things on the IR. All sensor types have some forms of aliasing. If you know how, you can confuse capacitive sensors too :-) m -- martin.langh...@gmail.com mar...@laptop.org -- Software Architect - OLPC - ask interesting questions - don't get distracted with shiny stuff - working code first - http://wiki.laptop.org/go/User:Martinlanghoff ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] Multi-touch test activity
On 2012-11-06, at 23:50, Martin Langhoff martin.langh...@gmail.com wrote: On Sun, Nov 4, 2012 at 8:29 PM, Bert Freudenberg b...@freudenbergs.de wrote: 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. There are of course limitations, but we are in the process of tuning and tightening things on the IR. Okay. The breaking up of touch contacts was surprising. I attached a photo here: http://dev.laptop.org/ticket/12282 All sensor types have some forms of aliasing. If you know how, you can confuse capacitive sensors too :-) Yep. You may find my updated activity version useful in testing: http://activities.sugarlabs.org/en-US/sugar/addon/4611/ I modified it to keep displaying the last touches. Single-touch works pretty well already, tweaking multi-touch sounds good :) - Bert - ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
[Sugar-devel] Multi-touch test activity
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. ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] Multi-touch test activity
We got a new version of firmware from Neonode last week that improves things a small amount. I'm not sure what the state of the firmware auto-update it. One complication is that it was tuned for the tinted light guides, and doesn't work as well with the clear ones. I have some tinted light guides to send out --- reply to me privately if you are doing a lot of touch work. Cheers, wad On Nov 4, 2012, at 5:48 PM, Bert Freudenberg wrote: 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 de...@lists.laptop.org http://lists.laptop.org/listinfo/devel ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] Multi-touch test activity
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. ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel _ This mail has been virus scanned by Australia On Line see http://www.australiaonline.net.au/mailscanning ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] Multi-touch test activity
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. ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
