What is Virtual Reality Technology – VR3D?

Virtual reality, the English name of virtual reality (abbreviated as VR) is a technology that helps humans "feel" the simulated space more realistically thanks to a type of 3-dimensional vision glasses (virtual reality glasses).  This virtual 3D environment  is created and controlled by a highly configurable computer system.

In particular, not just displaying 3D images, some VR systems also allow to simulate sounds and smells quite realistically!

The virtual 3D environment  is created and controlled by a highly configurable computer system

It's virtual, that's for sure, but why is it called reality?

It is thanks to the real-time feedback that the VR system knows how to recreate and transform the 3D environment to suit the situation. In this case, humans make decisions by actions (or thoughts), sensors pick up electrical signals and from there the computer analyzes and produces a new virtual environment according to a pre-built principle or algorithm.

Virtual environments transform with reality

For example: When playing a  smart VR role-playing game, you turn your gaze and the scene in front of you immediately changes. If you run 1 paragraph, breathing rapidly, the corresponding "strength" stat in the game character also decreases,...

What are the components of a virtual reality system?

A general VR system consists of 5 components: software (SW), hardware (HW), linked network, users, and applications. In which, the 3 main and most important components are software (SW), hardware (HW) and applications.

Software: Software has always been the soul of VR as well as for any modern computer system. In principle, it is possible to use any programming language or graphics software to model and simulate VR objects. Examples include the (free to find) languages OpenGL, C++, Java3D, VRML, X3D,... or commercial software such as WorldToolKit, PeopleShop,... The software of any VR must ensure 2 main uses: Creating images into Simulation. VR objects are modeled by this software itself or transferred from 3D models (designed by other CAD software such as AutoCAD, 3D Studio,..). Then the VR software must be able to simulate the kinematics, dynamics, and behavior of the object.

Hardware: The hardware of a VT system includes: Computers (PCs or workstations with strong graphics configurations), input devices, and output devices.

– Input devices: These include output devices that are able to stimulate the senses to create a sense of existence in the virtual world. Examples include HMD headsets, mice, stereo headphones – and input devices that can record where the user is looking or pointing, such as head-trackers and wire-gloves.

– Output devices: including graphic displays (such as screens, HDM,..) to see 3D objects. Audio equipment (speakers) to hear surround sound (such as Hi-Fi, Surround,..). Haptic feedback (like a glove,..) to create a tactile sensation when touching and grasping the object. Force Feedback to create an impact force such as when cycling or riding on a bumpy road,...

What makes VR different?

For a virtual reality system, interactivity, real-time holographic graphics, and a sense of immersion are considered key characteristics.

In a virtual reality system, interactivity, real-time holographic graphics, and a sense of immersion are considered key characteristics

Real-time interactivity: This means that the computer is able to recognize the user's input signal and instantly change the virtual world. Users see things change on the screen at their own pace and are attracted to this simulation.

Immersion: is an effect that creates the ability to selectively focus the highest attention on the information from the user of the virtual reality system. Users feel like they are part of the virtual world, blending into that world. VR also pushes this feeling even more "real" by impacting other sensory channels. Users can not only see 3D graphic objects, control (rotate, move, etc.) objects, but also touch and feel them as if they are real. Researchers are also looking for ways to create other sensations such as smelling and tasting in the virtual world.

Interactivity: there are two aspects of interactivity in a virtual world: the travel inside the world and the dynamics of the environment. Travel is the user's ability to move around independently, as if they were inside a real environment. Software developers can impose restrictions on access to certain virtual areas, allowing for varying degrees of freedom (Users can fly, climb walls, move around, swim, and dive, etc.). Another aspect of travel is the positioning of the user's point of view. Point of view control is when the user follows themselves from a distance, observing the scene through the eyes of another person, or moving around the design of a new building as if sitting in a push-up chair... The dynamics of the environment are the rules about how people, things, and things interact with each other in an order to exchange energy or information.

Application of VR technology

Play virtual reality games

In developed countries, we can see VR being applied in all fields: science and technology, architecture, military, entertainment, tourism, real estate, etc. and meet all needs: Research - Education - Trade - Services. Medicine and tourism are traditional fields of application of VR. Besides, VR is also applied in education, art, entertainment, virtual tour, real estate, etc. In the military field, VR is also widely applied in developed countries.

In addition to the traditional applications above, there are also a number of new applications that have emerged in recent times of VR such as: game environment simulation, virtual interaction. When wearing virtual reality glasses, gamers will feel like they are immersed in a 3D space world with a wide viewing angle of up to 110 degrees, much more real than when we sit in front of a computer screen with a viewing angle of only 45 degrees. You will feel overwhelmed, especially when playing role-playing or FPS games