[PD] leapmotion and hands

Jan Baumgart raga.raga at gmx.de
Mon Sep 8 20:56:24 CEST 2014


I'm planning on updating chikashi's code to version 2 of leapmotions 
api. This will add many more data entries..

Should be straight forward and finished in about 2 weeks.
I will announce the release on the list.


On 09/08/2014 08:17 PM, Max wrote:
> Currently leapmotion.pd does not let you know if the hand is a right or
> left one. This abstraction tries to work around this limitation, but
> does not fully eradicate it. It ultimately is a quirk, because the SDK
> should be able to know if it is a right or left hand because of the
> thumb position. However this information isn not available from within
> leapmotion.pd
> The abstraction has two modes which switch depending on how many hands
> are in the field of view:
> 1 one hand becomes present: will check if the hand appeared on the right
> or the left side from the zenith above the device. Assuming that it is
> the right hand if it appeared on the right side. You can then use the
> full space with that hand and it will keep its designation.
> Catch: make sure to initialize correctly and always approach the device
> with the right hand from the right and the left hand from the left.
> 2 two hands present: will check which of the two hands is rightmost and
> defines that as the right one.
> Catch: never cross hands.
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Jan Baumgart
Technischer Mitarbeiter
Hochschule für Musik und Darstellende Kunst
Eschersheimer Landstr. 29-39
60322 Frankfurt am Main

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