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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#N canvas 771 172 632 556 10; #X obj -171 320 leapmotion-rightlefthand; #X obj -171 106 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1 -1; #X obj -171 42 tgl 30 0 empty empty empty 17 7 0 10 -262144 -1 -1 0 1; #X obj -171 80 metro 50; #X msg -115 80 info; #X obj -171 165 leapmotion; #N canvas 407 57 450 300 hands 0; #X obj 169 75 unpack 0 0 0 0 0 0; #X floatatom 163 119 5 0 0 0 hands - -, f 5; #X obj 169 49 inlet; #X connect 0 2 1 0; #X connect 2 0 0 0; #X coords 0 -1 1 1 120 40 1 100 100; #X restore -171 405 pd hands; #X text 69 119 The abstraction has two modes:; #X text 89 142 1 one hand present: will check if the hand appeared on the right or the left side and assume that it is the right hand if it appeared on the right side., f 56; #X text 89 212 2 two hands present: will check which of the two hands is rightmost and defines that as the right one., f 56; #X obj -109 250 t a a; #N canvas 770 672 450 300 checkhands 0; #X obj 139 -80 inlet; #X obj 139 -58 route hand; #X obj 139 -34 route 0 1; #X obj 139 8 route palm_position; #X obj 271 8 route palm_position; #X obj 139 37 unpack f f f; #X obj 271 36 unpack f f f; #X floatatom 126 120 5 0 0 0 h_0 - -, f 5; #X floatatom 185 121 5 0 0 0 h_1 - -, f 5; #X connect 0 0 1 0; #X connect 1 0 2 0; #X connect 2 0 3 0; #X connect 2 1 4 0; #X connect 3 0 5 0; #X connect 4 0 6 0; #X connect 5 0 7 0; #X connect 6 0 8 0; #X coords 0 -1 1 1 120 40 1 100 100; #X restore -2 369 pd checkhands; #N canvas 770 672 450 300 checkhands 0; #X obj 139 -80 inlet; #X obj 139 -58 route hand; #X obj 139 -34 route 0 1; #X obj 139 8 route palm_position; #X obj 271 8 route palm_position; #X obj 139 37 unpack f f f; #X obj 271 36 unpack f f f; #X floatatom 126 120 5 0 0 0 h_0 - -, f 5; #X floatatom 185 121 5 0 0 0 h_1 - -, f 5; #X connect 0 0 1 0; #X connect 1 0 2 0; #X connect 2 0 3 0; #X connect 2 1 4 0; #X connect 3 0 5 0; #X connect 4 0 6 0; #X connect 5 0 7 0; #X connect 6 0 8 0; #X coords 0 -1 1 1 120 40 1 100 100; #X restore 0 286 pd checkhands; #X text 67 71 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.; #X connect 0 0 6 0; #X connect 0 1 11 0; #X connect 1 0 5 0; #X connect 2 0 3 0; #X connect 3 0 1 0; #X connect 4 0 5 0; #X connect 5 0 0 0; #X connect 5 1 10 0; #X connect 5 2 0 2; #X connect 10 0 0 1; #X connect 10 1 12 0;
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