"VR virtual reality first media VR daily newspaper original manuscript, please indicate the source of the reprint"
In the development of the VR industry, hardware, software and content are facing challenges. At present, VR technology is constantly improving, for example, brainwave sensing technology, Samsung and LG are competing to showcase the latest display technologies, etc. Relatives VR fans are a big benefit. According to recent news, another new technology has been developed, which is the vertex shift. This technology allows low-end mobile phones to run virtual reality smoothly.
What is the vertex displacement?
Vertex displacement means that the picture is first distorted into a barrel distortion, and the head display will produce pincushion distortion, so that the subsystem does not need to perform barrel distortion. If you remember that all computer graphics are made up of photons, then you understand the principle, and the vertex displacement does not distort the lines. The two vertices are kept at a straight line distance.
However, if you swap the positions of these vertices, you can get a rough lens calibration and you can render the image at once. However, this also presents a challenge. Low-polygon objects (such as squares) are not affected by vertex displacement. If lens calibration is required, the square needs to be slightly arched.
What is the development trend?
When the vertex displacement technology is applied to the mobile VR device, the mobile VR device no longer needs to match the matching smart phone to run, just as the Samsung Gear VR is no longer necessary to match the Samsung smart phone, and Other ordinary mobile phone combinations can also run. In the era of one mobile phone today, for the public, you can experience VR. I believe that VR devices will become more and more popular in people's field of vision, let people know more about VR. What kind of concept is it, not only limited to the understanding of young people or VR enthusiasts, it will no longer block ordinary users outside the VR door, which is considered to be a distance between VR and ordinary users. .
According to the latest Digi-Capital research: "In view of the high performance requirements of high-end VR head-to-head PC performance, we believe that the mobile VR headset represented by Samsung Gear VR will become an important driving force in the VR consumer market." The advantages and disadvantages of the VR device on the mobile terminal and the VR device on the mobile terminal are very obvious. The portable and low cost of the mobile terminal is its natural advantage. However, there are still some shortcomings in the experience. For example, how to make users more immersive.
Through vertex displacement and subdivided image technology, users can get great immersion when watching ArcTIc Journey on Cardborad, and solve some shortcomings in mobile VR hardware, so that users can get more on mobile VR. Good immersion.
However, some believe that this technology will not be widely popular, because Google's new virtual reality platform Daydream does not support this technology, although we do not know why these companies are not willing to use this technology, but no matter what the reason, I believe Ordinary users are beneficial, and there is absolutely no shortage of developers.
Impact on VR devices
At present, there are many problems in mobile VR devices. For example, the problem of dizziness, after wearing a glasses box, ordinary people will feel dizzy after playing for a few minutes. So for now, the biggest challenge is hardware equipment. If you want users to have a good experience, then you need to improve the technology to a minimum standard of 60fps. If it is lower than this standard, it will cause users to stun, but 60fps is for most smartphones. A big challenge, especially on older phones, is even more difficult.
To some extent, virtual reality is the same as 3D. The virtual reality device needs to render two different scenes for each of the two eyes. In addition, more importantly, all virtual reality inevitably causes distortion, distortion and distortion of the image, and a straight line looks like a curved one. To solve this problem, high-end head-mounted devices calibrate the image with double distortion. Simply put, the lens produces image distortion and then repairs the image by twisting it again. But this requires a powerful feature set that is not suitable for today's smartphones.
To this end, developer Klein Kell and his team came up with a creative solution that would allow the Galaxy S3 to achieve a stable 60fps. Initial experiments have shown that these old phones are completely incapable of achieving a stable 60fps. So they thought of a way: instead of first rendering the game world and then distorting, it is better to directly distort the entire world.
As Kher said, a curved line is seen through a curved lens to get a straight line. But because the vertex displacement does not distort the line, it does not calibrate some simple objects, such as squares. To do this, they used tessellation technology. In vertex displacement, you can subdivide some simple polygons, such as squares, into a myriad of smaller squares, each of which consists of two triangles. Rendering these vertices does not consume too much CPU. The emergence of this vertex displacement technology is a new development process for mobile VR devices.
The development of VR technology is getting faster and faster. For enterprises that have already entered the VR industry, the most important thing is to keep up with the pace of technological development and popularize VR devices into people's lives. Perhaps in the future, vertex displacement technology will make VR Mobile devices are king, this is not impossible. After all, it is conducive to the development of VR. Relatively speaking, there will be no shortage of relevant R&D people.
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