Joystick.kt

var hasMoved: Boolean = false
    get() {
        if (initialTouchPosition == null)
            return false
        if (lastTouchPosition == null)
            return false
        val xDiff = abs(initialTouchPosition!!.x - lastTouchPosition!!.x)
        val yDiff = abs(initialTouchPosition!!.y - lastTouchPosition!!.y)
        val epsilon = 0.1
        return xDiff > epsilon || yDiff > epsilon
    }