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