What is Virtual Reality (VR)?
VR is defined as a computer-generated world. You may refer it as an alternative world in which you may see, hear or even interact with things in it. Currently, you might need the help of real objects to actually "feel" this world. However, the technology world is always changing. We expect to see VR reach a new stage that it will upload your mind into the Virtual World and hence a story begin. Many film producers have exploited this concept and brought on big screens.
The first one of VR key technologies is tracking. VR requires a precise calculation of user movements and actions so that the environment is generated and the user does not feel isolated or unrealistic. Therefore it is vital to this aspect that sensors–from Virtual scopes, cameras and eye trackers.
Another one is the graphics generated from computer. As graphics should be synchronized with the user's motion, precise calculations of instances and outputs are necessary, which is a real challenge for a normal device.
Currently VR technology uses virtual reality headsets or multiple-projected environments to create realistic images, sounds and other sensations. The goal is that simulate the physical presence of a user in a virtual or imaginary environment, sometimes in combination with the physical environment. A person using VR can look around the artificial world, move through the artificial world and interact with virtual elements. The effect is usually produced by VR headsets that consist of a header with a small screen in front of the eye but also through special rooms with multiple large screens. This can be created by specially designed rooms.
At the moment, cloud computing network is a better solution and will be an affordable solution in the near future. User don't have to afford a high-performance computer and a set of VR accessory to experience the virtual world.
(*) Disclaimer: banner image from the Matrix.