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joyrexus/README.md

Created October 29, 2013 17:16
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Extract data from a gesture sample
Raw
README.md

`filter.jq' is a simple jq script for extracting hand position and velocity data from a leap gesture sample captured with handy.

jq --from-file filter.jq in.json > out.json

We're using it to convert gesture samples prior to rendering.

Raw
filter.jq
[
.[] |
{
timestamp,
left: {
id: .hands[0].id,
pos: {
x: .hands[0].palmPosition[0],
y: .hands[0].palmPosition[1],
z: .hands[0].palmPosition[2]
},
vel: {
x: .hands[0].palmVelocity[0],
y: .hands[0].palmVelocity[1],
z: .hands[0].palmVelocity[2]
}
},
right: {
id: .hands[1].id,
pos: {
x: .hands[1].palmPosition[0],
y: .hands[1].palmPosition[1],
z: .hands[1].palmPosition[2]
},
vel: {
x: .hands[1].palmVelocity[0],
y: .hands[1].palmVelocity[1],
z: .hands[1].palmVelocity[2]
}
}
}
]
Raw
in.json
[
{
"timestamp": 3726297668,
"t": [
-2371.2,
-4278.67,
1973.98
],
"currentFrameRate": 57.2716,
"gestures": [],
"hands": [
{
"timeVisible": 0.156521,
"t": [
0,
0,
0
],
"stabilizedPalmPosition": [
71.4505,
128.013,
99.0209
],
"sphereRadius": 48.5946,
"direction": [
0.545751,
0.835466,
-0.0644334
],
"id": 40,
"palmNormal": [
-0.329128,
0.14301,
-0.933393
],
"palmPosition": [
71.4287,
128.014,
98.9659
],
"palmVelocity": [
-158.824,
5.34524,
-402.842
],
"r": [
[
1,
0,
0
],
[
0,
1,
0
],
[
0,
0,
1
]
],
"s": 1,
"sphereCenter": [
69.6372,
132.235,
107.875
]
}
],
"id": 42340,
"interactionBox": {
"size": [
261.882,
261.882,
191.686
],
"center": [
0,
240,
0
]
},
"pointables": [
{
"touchZone": "hovering",
"touchDistance": 0.333333,
"tool": false,
"direction": [
0.733056,
0.233466,
-0.638845
],
"handId": -1,
"id": 36,
"length": 34.6309,
"stabilizedTipPosition": [
82.247,
253.895,
62.029
],
"timeVisible": 0.034789,
"tipPosition": [
82.247,
253.895,
62.029
],
"tipVelocity": [
5.27358,
491.535,
-152.441
]
}
],
"r": [
[
0.281917,
-0.214347,
0.935189
],
[
0.0611448,
-0.96873,
-0.240467
],
[
0.957488,
0.124974,
-0.259995
]
],
"s": -153.668
},
{
"timestamp": 3726315050,
"t": [
-2369.36,
-4269.78,
1973.25
],
"currentFrameRate": 57.3491,
"gestures": [],
"hands": [
{
"timeVisible": 0,
"t": [
-1.20433,
0.718803,
-2.2152
],
"stabilizedPalmPosition": [
69.0469,
129.435,
94.5849
],
"sphereRadius": 49.1321,
"direction": [
0.400563,
0.913539,
-0.0706783
],
"id": 40,
"palmNormal": [
-0.289082,
0.0528033,
-0.955847
],
"palmPosition": [
69.0201,
129.451,
94.5354
],
"palmVelocity": [
-138.572,
82.7066,
-254.885
],
"r": [
[
1,
0,
0
],
[
0,
1,
0
],
[
0,
0,
1
]
],
"s": 1,
"sphereCenter": [
69.7615,
131.942,
107.435
]
}
],
"id": 42341,
"interactionBox": {
"size": [
261.882,
261.882,
191.686
],
"center": [
0,
240,
0
]
},
"pointables": [
{
"touchZone": "hovering",
"touchDistance": 0.333333,
"tool": false,
"direction": [
0.734636,
0.315176,
-0.600811
],
"handId": -1,
"id": 36,
"length": 35.5817,
"stabilizedTipPosition": [
83.657,
259.111,
61.1662
],
"timeVisible": 0.052171,
"tipPosition": [
83.657,
259.111,
61.1662
],
"tipVelocity": [
116.457,
520.129,
-109.216
]
}
],
"r": [
[
0.281917,
-0.214347,
0.935189
],
[
0.0611448,
-0.96873,
-0.240467
],
[
0.957488,
0.124974,
-0.259995
]
],
"s": -153.668
},
{
"timestamp": 3726332453,
"t": [
-2375.22,
-4270.91,
1968.8
],
"currentFrameRate": 57.3827,
"gestures": [],
"hands": [
{
"timeVisible": 0.017403,
"t": [
-14.2588,
-11.0807,
-10.8865
],
"stabilizedPalmPosition": [
67.2896,
130.044,
92.2266
],
"sphereRadius": 48.7864,
"direction": [
0.287253,
0.938918,
-0.189522
],
"id": 40,
"palmNormal": [
-0.2543,
-0.116006,
-0.960143
],
"palmPosition": [
67.2629,
130.053,
92.1908
],
"palmVelocity": [
-100.969,
34.6039,
-134.727
],
"r": [
[
1,
0,
0
],
[
0,
1,
0
],
[
0,
0,
1
]
],
"s": 1,
"sphereCenter": [
68.837,
130.112,
106.86
]
}
],
"id": 42342,
"interactionBox": {
"size": [
261.882,
261.882,
191.686
],
"center": [
0,
240,
0
]
},
"pointables": [
{
"touchZone": "none",
"touchDistance": 0.333333,
"tool": false,
"direction": [
0.891829,
0.246817,
-0.379109
],
"handId": -1,
"id": 36,
"length": 35.8098,
"stabilizedTipPosition": [
84.1415,
263.188,
60.2956
],
"timeVisible": 0.069574,
"tipPosition": [
84.1415,
263.188,
60.2956
],
"tipVelocity": [
23.3885,
358.329,
-98.087
]
},
{
"touchZone": "hovering",
"touchDistance": 0.333333,
"tool": false,
"direction": [
0.331701,
-0.409046,
-0.850092
],
"handId": 40,
"id": 57,
"length": 25.103,
"stabilizedTipPosition": [
37.5933,
121.8,
62.5981
],
"timeVisible": 0,
"tipPosition": [
37.5933,
121.8,
62.5981
],
"tipVelocity": [
-1431.06,
-1397.34,
-869.242
]
}
],
"r": [
[
0.277301,
-0.232373,
0.932259
],
[
0.0384933,
-0.966845,
-0.252444
],
[
0.960012,
0.105889,
-0.259162
]
],
"s": -153.596
}
]
Raw
out.json
[
{
"right": {
"vel": {
"z": null,
"y": null,
"x": null
},
"pos": {
"z": null,
"y": null,
"x": null
},
"id": null
},
"left": {
"vel": {
"z": -402.842,
"y": 5.34524,
"x": -158.824
},
"pos": {
"z": 98.9659,
"y": 128.014,
"x": 71.4287
},
"id": 40
},
"timestamp": 3726297668
},
{
"right": {
"vel": {
"z": null,
"y": null,
"x": null
},
"pos": {
"z": null,
"y": null,
"x": null
},
"id": null
},
"left": {
"vel": {
"z": -254.885,
"y": 82.7066,
"x": -138.572
},
"pos": {
"z": 94.5354,
"y": 129.451,
"x": 69.0201
},
"id": 40
},
"timestamp": 3726315050
},
{
"right": {
"vel": {
"z": null,
"y": null,
"x": null
},
"pos": {
"z": null,
"y": null,
"x": null
},
"id": null
},
"left": {
"vel": {
"z": -134.727,
"y": 34.6039,
"x": -100.969
},
"pos": {
"z": 92.1908,
"y": 130.053,
"x": 67.2629
},
"id": 40
},
"timestamp": 3726332453
}
]
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