Study on Virtual Reality

Virtual reality technology is a highly integrated high—tech.The technology is widely used in advanced manufacturing, military simulation,digital city,biomedical and other fields.In this paper we backward the origins of virtual reality technology,and discuss its three characteristics:immersion,interaction,animation.In the end we classified the virtual reality into four group according to different extent of immersion,that is desktop virtual reality,immerse virtual reality,advantage virtual reality and distributed virtual reality.