Leap Motion JavaScript hand position. Simple method to collect the palm position of the first hand on every leap motion frame loop.

LeapHandPosition.js

var handPos = { handId: '', normX: 0, normY: 0, normZ: 0, posX: 0, posY: 0, posZ: 0, rotX: 0, rotY: 0, rotZ: 0, set: false };

        Leap.loop(function (frame) {
            var handIds = {};
            if (frame.hands === undefined) {
                var handsLength = 0
            } else {
                var handsLength = frame.hands.length;
            }

            var firstHand = true;
            for (var handId = 0, handCount = handsLength; handId != handCount; handId++) {
                var hand = frame.hands[handId];

                if (firstHand) {
                    
                    var interactionBox = frame.interactionBox;
                    var normalizedPosition = interactionBox.normalizePoint(hand.palmPosition, true);

                    // Convert the normalized coordinates to span the canvas
                    handPos.normX = normalizedPosition[0];
                    handPos.normY = normalizedPosition[2];
                    handPos.normZ = normalizedPosition[1];

                    handPos.handId = handId;
                    handPos.posX = (hand.palmPosition[0] * 3);
                    handPos.posY = (hand.palmPosition[2] * 3) - 200;
                    handPos.posZ = (hand.palmPosition[1] * 3) - 400;
                    handPos.rotX = (hand._rotation[2] * 90);
                    handPos.rotY = (hand._rotation[1] * 90);
                    handPos.rotZ = (hand._rotation[0] * 90);
                    handPos.set = true;
                    firstHand = false;
                }

            }            
        });