Control XBOX controller vibration with LEAP motion

leap-xbox-rumble.js

var Leap = require('leapjs');
var XboxController = require('xbox-controller');
var xbox = new XboxController;

Leap.loop(function (frame) {
    if (frame.hands.length === 0) {
        xbox.rumble(0, 0);
        return;
    }
    frame.hands.forEach(function(hand) {
        var left = Math.max(0, - hand.palmPosition[0] / 250);
        var right = Math.max(0, hand.palmPosition[0] / 250);
        var power = (400 - hand.palmPosition[1]) / 400;
        var rumbles = [
            Math.max(0, Math.min(255, 100 * power + 150 * left)),
            Math.max(0, Math.min(255, 100 * power + 150 * right))
        ];
        xbox.rumble(rumbles[0], rumbles[1]);
        xbox.setLed( left>right ? 0x06 : 0x07 );
    });
});