leapmotion-ts/samples/sample.ts

TypeScript framework for Leap Motion.

import Leap = require('../build/leapmotionts-2.2.4');
var controller:Leap.Controller = new Leap.Controller();
controller.addEventListener(Leap.LeapEvent.LEAPMOTION_CONNECTED, (event:Leap.LeapEvent) => {
    controller.enableGesture(Leap.Type.TYPE_CIRCLE, true);
    controller.enableGesture(Leap.Type.TYPE_SWIPE, true);
    controller.enableGesture(Leap.Type.TYPE_SCREEN_TAP, true);
    controller.enableGesture(Leap.Type.TYPE_KEY_TAP, true);
});
controller.addEventListener(Leap.LeapEvent.LEAPMOTION_FRAME, (event:Leap.LeapEvent) => {
    var frame:Leap.Frame = event.frame;
    console.log("Frame id:" + frame.id + ", timestamp:" + frame.timestamp + ", hands:" + frame.hands.length + ", fingers:" + frame.fingers.length + ", tools:" + frame.tools.length + ", gestures:" + frame.gestures().length);

    if (frame.hands.length > 0) {
        // Get the first hand
        var hand:Leap.Hand = frame.hands[0];

        // Check if the hand has any fingers
        var fingers:Leap.Finger[] = hand.fingers;
        if (fingers.length > 0) {
            // Calculate the hand's average finger tip position
            var avgPos:Leap.Vector3 = Leap.Vector3.zero();
            for (var i:number = 0; i <fingers.length; i++)
                avgPos = avgPos.plus(( <Leap.Finger>fingers[i]).tipPosition);

            avgPos = avgPos.divide(fingers.length);
            console.log("Hand has " + fingers.length + " fingers, average finger tip position:" + avgPos);
        }

        // Get the hand's sphere radius and palm position
        console.log("Hand sphere radius:" + hand.sphereRadius + " mm, palm position:" + hand.palmPosition);

        // Get the hand's normal vector and direction
        var normal:Leap.Vector3 = hand.palmNormal;
        var direction:Leap.Vector3 = hand.direction;

        // Calculate the hand's pitch, roll, and yaw angles
        console.log("Hand pitch:" + Leap.LeapUtil.toDegrees(direction.pitch) + " degrees, " + "roll:" + Leap.LeapUtil.toDegrees(normal.roll) + " degrees, " + "yaw:" + Leap.LeapUtil.toDegrees(direction.yaw) + " degrees\n");
    }

    var gestures:Leap.Gesture[] = frame.gestures();
    for (var i:number = 0; i <gestures.length; i++) {
        var gesture:Leap.Gesture = gestures[i];

        switch (gesture.type) {
            case Leap.Type.TYPE_CIRCLE:
                var circle:Leap.CircleGesture = <Leap.CircleGesture>gesture;

                // Calculate clock direction using the angle between circle normal and pointable
                var clockwiseness:string;
                if (circle.pointable.direction.angleTo(circle.normal) <= Math.PI / 4) {
                    // Clockwise if angle is less than 90 degrees
                    clockwiseness = "clockwise";
                } else {
                    clockwiseness = "counterclockwise";
                }

                // Calculate angle swept since last frame
                var sweptAngle:number = 0;
                if (circle.state != Leap.State.STATE_START) {
                    var previousGesture:Leap.Gesture = controller.frame(1).gesture(circle.id);
                    if (previousGesture.isValid()) {
                        var previousUpdate:Leap.CircleGesture = ( <Leap.CircleGesture>controller.frame(1).gesture(circle.id));
                        sweptAngle = (circle.progress - previousUpdate.progress) * 2 * Math.PI;
                    }
                }
                console.log("Circle id:" + circle.id + ", " + circle.state + ", progress:" + circle.progress + ", radius:" + circle.radius + ", angle:" + Leap.LeapUtil.toDegrees(sweptAngle) + ", " + clockwiseness);
                break;
            case Leap.Type.TYPE_SWIPE:
                var swipe:Leap.SwipeGesture = <Leap.SwipeGesture>gesture;
                console.log("Swipe id:" + swipe.id + ", " + swipe.state + ", position:" + swipe.position + ", direction:" + swipe.direction + ", speed:" + swipe.speed);
                break;
            case Leap.Type.TYPE_SCREEN_TAP:
                var screenTap:Leap.ScreenTapGesture = <Leap.ScreenTapGesture>gesture;
                console.log("Screen Tap id:" + screenTap.id + ", " + screenTap.state + ", position:" + screenTap.position + ", direction:" + screenTap.direction);
                break;
            case Leap.Type.TYPE_KEY_TAP:
                var keyTap:Leap.KeyTapGesture = <Leap.KeyTapGesture>gesture;
                console.log("Key Tap id:" + keyTap.id + ", " + keyTap.state + ", position:" + keyTap.position + ", direction:" + keyTap.direction);
                break;
        }
    }
});