hybridgroup.gobot/platforms/leap/docs/events_leapmotion.md

Events

hand

Gets triggered when doing a hand motion, makes hand input available.

Leap Hand contains:

• position (palm x-y-z coords)
• wrist rotation (axis,angle,matrix)

Example JSON

  {
      "direction": [
        0.772435,
        0.520335,
        -0.364136
      ],
      "id": 57,
      "palmNormal": [
        -0.0100593,
        -0.563263,
        -0.826217
      ],
      "palmPosition": [
        117.546,
        236.007,
        76.3394
      ],
      "palmVelocity": [
        -866.196,
        -100.749,
        275.692
      ],
      "r": [
        [
          0.999844,
          0.0142022,
          0.0105289
        ],
        [
          -0.0141201,
          0.99987,
          -0.00783186
        ],
        [
          -0.0106388,
          0.00768197,
          0.999914
        ]
      ],
      "s": 0.992511,
      "sphereCenter": [
        156.775,
        227.378,
        48.3453
      ],
      "sphereRadius": 75.3216,
      "stabilizedPalmPosition": [
        119.009,
        236.071,
        75.951
      ],
      "t": [
        -38.0468,
        28.2341,
        -21.3291
      ],
      "timeVisible": 0.051952
    }

gesture

Gets triggered when doing a gesture motion, makes hand input available.

There is 4 Gesture types :

• Circle - A circular movement by a finger.
• Swipe - A straight line movement by the hand with fingers extended.
• KeyTap - A downward tapping movement by a finger.
• ScreenTap - A forward tapping movement by a finger.

Example JSON

  {
      "direction": [
        -0.647384,
        0.750476,
        -0.132964
      ],
      "duration": 0,
      "handIds": [
        57
      ],
      "id": 72,
      "pointableIds": [
        14
      ],
      "position": [
        117.665,
        313.471,
        27.2095
      ],
      "speed": 1050.66,
      "startPosition": [
        195.438,
        223.313,
        43.183
      ],
      "state": "start",
      "type": "swipe"
    }

pointable

Gets triggered when doing a pointable motion, makes hand input available.

Leap Pointable contains:

• length
• touch zone

##### Example JSON

  {
      "direction": [
        0.54044,
        0.174084,
        -0.823176
      ],
      "handId": 57,
      "id": 1,
      "length": 48.393,
      "stabilizedTipPosition": [
        194.714,
        291.812,
        20.6219
      ],
      "timeVisible": 0.13873,
      "tipPosition": [
        194.714,
        291.812,
        20.6219
      ],
      "tipVelocity": [
        -716.414,
        686.468,
        -427.914
      ],
      "tool": false,
      "touchDistance": 0.333333,
      "touchZone": "hovering"
    }

frame

Gets triggered with every motion detected, makes frame input available.

Message

Gets triggered when receiving a message.

More information abour the parser https://github.com/hybridgroup/gobot-leapmotion/blob/master/parser.go.