🕹️Lean Touch

Touch and mouse input handler

What for

Handle user input touches by events:

public class InputPrinter : MonoBehaviour {

    private void OnEnable() {
        LeanTouch.OnFingerUpdate += UpdateMove;
        LeanTouch.OnFingerDown += OnTouchDown;
        LeanTouch.OnFingerUp += OnTouchUp;
    }

    private void OnDisable() {
        LeanTouch.OnFingerUpdate -= UpdateMove;
        LeanTouch.OnFingerDown -= OnTouchDown;
        LeanTouch.OnFingerUp -= OnTouchUp;
    }

    private void OnTouchUp(LeanFinger finger) {
        print($"Last touch was in {finger.ScreenPosition}.\n" +
            $"Touch down and up positions delta = {finger.ScreenPosition - finger.StartScreenPosition}");
    }

    private void UpdateMove(LeanFinger finger) {
        print($"Move delta from touch down pos: {finger.ScreenPosition - finger.StartScreenPosition}\n" +
            $"Move delta between frames: {finger.ScreenPosition - finger.LastScreenPosition}");
    }

    private void OnTouchDown(LeanFinger finger) {
        print($"Touch down in {finger.ScreenPosition}");
    }
}

LeanTouch events are Action type. So you need to unsubscribe them in OnDestroy on OnDisable and avoid null references after scene change or object destroyed.

Basic setup

Add LeanTouch prefab to your scene - that's it.

We use Lean Touch for our custom Joystick. You can find example how it's implemented in Assets/_Examples/PlayerInput/Joystick/Joystick.scene

We use this class in TouchRaycaster (RaycastManager section).