The characteristics of virtual reality
1. Immersion
Immersion is the main characteristic of virtual reality technology, is to let the user be and feel your part of the environment that is created by the computer system, the immersion of virtual reality technology depends on the user's perception system, when users perception to the virtual world of the stimulus, such as touch, taste, smell, motion perception, will produce resonance of thinking, psychological immersed, It's like being in the real world.
2. Interactivity
Interactivity refers to the user's operable degree of objects in the simulated environment and the natural degree of feedback from the environment. When the user enters the virtual space, the corresponding technology allows the user to interact with the environment. When the user conducts certain operations, the surrounding environment will also make certain reactions. If the user touches an object in the virtual space, the user's hand should be able to feel it. If the user moves the object, the position and state of the object should also change.
3. Be more perceptive
Multisensory means that computer technology should have many senses, such as hearing, touch, smell and so on. The ideal virtual reality technology should have the perception function that all people have. Due to the limitations of related technologies, especially sensing technologies, most of the current virtual reality technologies are limited to visual, auditory, tactile, motion and other sensory functions.
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4. Constructiveness
Imagination is also called imagination. In virtual space, users can interact with objects around them, broaden their cognitive scope, and create scenes that do not exist in the objective world or environments that are impossible to happen. Conception can be understood as the user enters the virtual space, absorbs knowledge according to their own feeling and cognitive ability, widens their thinking, and creates new concepts and environments.
5. Autonomy
It refers to the degree to which objects in a virtual environment behave according to the laws of physics. For example, when pushed by a force, the object will move in the direction of the force, or tip over, or fall from the table to the ground.
What are the key technologies of virtual reality
1. Dynamic environment modeling technology
The establishment of virtual environment is the core content of VR system, the purpose is to obtain the 3d data of the actual environment, and establish the corresponding virtual environment model according to the needs of the application.
2. Real-time 3D graphics generation technology
3d graphics generation technology has been relatively mature, so the key is "real-time" generation. In order to ensure real-time, ensure that the graphics refresh rate is at least 15 frames per second, preferably higher than 30 frames per second.
3. Stereoscopic display and sensor technology
The interactive capability of virtual reality depends on the development of stereoscopic display and sensor technology. The existing equipment can not meet the needs, and the research of mechanical and tactile sensing devices also needs to be further deepened. The tracking accuracy and tracking range of virtual reality equipment also need to be improved.
4. Application system development tools
The key of virtual reality application is to find suitable occasions and objects. Selecting suitable objects can greatly improve production efficiency, reduce labor intensity and improve product quality. To achieve this goal, we need to study the development tools of virtual reality.
5. System integration technology
Since VR system includes a large amount of perceptual information and models, system integration technology plays a crucial role, including information synchronization technology, model calibration technology, data conversion technology, data management model, recognition and synthesis technology, etc.