Introduction to vr principles

VR is the abbreviation of Virtual Reality. The Chinese meaning is virtual reality. It was originally translated as "spiritual realm technology".

Virtual reality is the ultimate application form of multimedia technology. It is the crystallization of the rapid development of computer software and hardware technology, sensing technology, robotics, artificial intelligence, behavioral psychology and other scientific fields. (Recommended learning: web front-end video tutorial)

mainly relies on three-dimensional real-time graphics display, three-dimensional positioning tracking, tactile and olfactory sensing technology, artificial intelligence technology, high-speed computing and The development of many key technologies such as parallel computing technology and human behavior research.

With the development of virtual reality technology, the true realization of virtual reality will cause great changes in the entire human life and development.

People put on special sensing equipment such as stereoscopic glasses and data gloves and face a three-dimensional simulated reality. They seem to be in a world with three-dimensional vision, hearing, touch and even smell. Information interaction with this environment can be achieved through people's natural skills and corresponding facilities.

The 1992 report of the Interactive Systems Project Working Group funded by the U.S. National Science Foundation provided a more systematic discussion of VR, and identified and suggested future research directions in the field of virtual reality environments.

It can be considered that virtual reality technology integrates computer graphics technology, computer simulation technology, sensor technology, display technology and other scientific technologies. It creates a virtual information environment in a multi-dimensional information space, allowing users to have physical reality. The immersive feeling has the ability to perfectly interact with the environment and help inspire ideas.

So, immersion, interaction and conception are the three basic characteristics of VR environment system. The core of virtual technology is modeling and simulation.

Virtual reality is widely used in medicine, entertainment, military aerospace, interior design, real estate development, industrial simulation, emergency deduction, games, geography, education, hydrogeology, maintenance, training and training, shipbuilding , automobile simulation, rail transportation, energy field, biomechanics, rehabilitation training and digital earth, etc.

Virtual reality is considered to be the highest level application of multimedia.

It is computer technology, computer graphics, computer vision, visual physiology, visual psychology, simulation technology, microelectronics technology, three-dimensional display technology, sensing and measurement technology, speech recognition and synthesis technology, It is the result of the integration of various high-tech technologies such as human-machine interface technology, network technology, and human intelligence technology.

Its fidelity and real-time interactivity provide strong support for system simulation technology. Virtual reality technology has the following characteristics.

Immersion

Also known as presence, it refers to the user’s sense of reality in the virtual world. The ideal simulation environment should make it difficult for users to distinguish between real and fake, allowing users to fully immerse themselves in the three-dimensional virtual environment created by the computer. Everything in this environment looks real, sounds real, moves real, and even Everything smells, tastes, and feels real, just like it would in the real world.

Interactivity

refers to the user’s operability of objects in the virtual world. For example, users can directly grab virtual objects in the simulated environment with their hands. At this time, the hands have the feeling of holding something and can feel the weight of the object. The grabbed objects in the field of view can also move immediately with the movement of the hand.

Imagination

Also known as autonomy, it refers to the fact that users can rely on their own perception and cognitive abilities to achieve all-round functions in the multi-dimensional information space of the virtual world. Acquire knowledge effectively, exert subjective initiative, and seek perfect solutions to problems.

Since the first letter of the English words for the three characteristics of immersion, interactivity and imagination is all I, these three characteristics are often collectively referred to as the 3I characteristics.

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