Simulation & Models : Virtual Reality

A virtual reality (VR) system places the user of a computerised simulation in an artifically created environment. By using sophisticated computer graphics, three dimensional VR headsets and a data glove the user can almost come to believe that the artificially created environment is real.

Hardware Used In A Virtual Reality System

Because virtual reality systems must produce very high quality graphics they usually require a very fast microprocessor, a lot of RAM and a large backing storage device to work effectively. Two other specialised devices are also used by most VR systems :

VR Headset The user of a VR system wears a headset which incorporates two small VDUs which cover each eye, earphones which produce sounds and a motion sensor. Because there is one VDU for each eye the user can view three dimensional images generated by the computer. The motion sensor detects movement of the user's head so that as the user moves the image that is displayed can change to take account of the direction that he is looking in. The combination of these devices can create a very realistic virtual environment for the user.
Data Glove The data glove is worn on a hand of the user of a VR system. The glove contains sensors which detect the movement of the hand. By moving his hand the user can point at items in the virtual environment, pick them up and manipulate them.

Applications of Virtual Reality

Most current virtual reality systems are quite basic. Much research and development is being carried out in this area. The eventual applications of this technology are uncertain, but some possible uses are listed here.

The Virtual Office Most graphical user interfaces liken the experience of using a computer to working in an office. Files can be placed on a desktop, work is stored in folders etc. A virtual reality system can extend this metaphor. The user could operate the computer by interacting with an artifically created office. Files could be accessed by lifting them out of the filing cabinet. The telephone could be answered by lifting a virtual 'phone handset.
Training It is dangerous or difficult for some workers to train to carry out their jobs. For example soldiers can be injured in war exercises and astronauts can not easily practise the skills that they need to use in space on earth. By creating virtual reality copies of the real world environments that they have to work in these people can train to carry out their jobs by using computer simulators.
Recreation Many people enjoy playing computer games. These are becoming increasingly sophisticated and the graphics that they use are becoming more and more realistic. By using virtual reality hardware these games can be improved further still. Game players can be fooled into believing that they are actually within the environment of the game that they are playing.

GCSE ICT Companion 04 - (C) P Meakin 2004