Virtual reality technology is a computer simulation system can create and experience the virtual world, it is the use of computer to generate a simulation environment, a simulation system of 3D dynamic interactive multi-source information fusion, the visual entity behavior and users immerse in the environment.
Virtual reality technology is an important direction of simulation technology. It is a collection of various technologies such as simulation technology and computer graphics, human-machine interface technology, multimedia technology, sensing technology and network technology. It is a challenging cross technology frontier discipline and research area. Virtual reality technology (VR) mainly includes simulation environment, perception, natural skills and sensing equipment. The simulation environment is a three-dimensional and realistic image generated by computer and real-time dynamic. Perception means that the ideal VR should have the perception of all people. In addition to the visual perception generated by computer graphics, there are perceptive sense of hearing, touch, force and motion, and even olfaction and taste. It is also called multi perception. Natural skills refer to people's head rotation, eyes, gestures, or other human actions, which are processed by computers to match data with participants' actions, and respond to user's input in real time, and are fed back to the user's facial features. Sensing equipment is a three-dimensional interactive device.
The evolution of the history of the development of virtual reality technology can be divided into four stages: the dynamic simulation of the sound shape is the first stage of the ideological implication of virtual reality (before 1963); virtual reality budding into second stages (1963-1972); and the theory of virtual reality concept initially became a third stage (1973-1989); virtual reality theory further the improvement and application of fourth stage (1990-2004).
In addition to the visual perception of the general computer, there are also auditory perception, tactile perception, motion perception, and even taste, smell, and perception. The ideal virtual reality should have the perception of all people.
Sense of presence
Refers to the degree of authenticity that the user feels as the protagonist exists in the simulated environment. The ideal simulation environment should be to the extent that the users are hard to distinguish between true and false.
The degree of nature of the user's degree of manipulability and feedback from the environment in an simulated environment.
The extent to which objects in a virtual environment are based on the laws of physical motion of the real world.