Look Stick for FPS Games on Mobile Platforms

Unity Build in Look Stick or we can use unity Term "Right joystick" Already in mobile standard assets , i just want to know how to implement look method gameloft and madfinger have used in modern combat and shadowgun series respectively ..... any help will be appreciated ....
For Information Purposes i can see touch pad unmarked option in stick . it acts a little similar but really wierd if theres any plugin also for this looking thing i would love to know thanks