A drop of water popped out on the windshield, followed by a second, then a third.

"It's raining!" Zhu Lingling shouted in surprise in the passenger seat.

Although she has been to many other parties, she still can't adapt to the hot and dry weather in the north, and when she encounters a rainy day, it is like seeing a relative.

In the back seat, Atletico opened his eyes from his false sleep, glanced at the fussy assistant, closed his eyes and continued his fugue.

It didn't take long for the TeslaModel X, which had been brushed with the bee system, to slow down and steer and drive into the parking lot of the International Exhibition Center.

Bee's own driverless car is temporarily unable to hit the road, so it has to temporarily borrow Tesla's shell, anyway, the vehicle management office has not yet developed the habit of checking the version of the on-board system during the annual inspection, and it is usually driven, but there is no need to worry about being caught by the traffic management department and detaining the car and fined. As for cracking Tesla's system, this is nothing at all.

Getting out of the car and receiving the documents handed by the assistant, Atletico habitually turned on the spot to look at the surroundings.

This building complex was completed in 1985, although there are modifications and additions, but it is still inevitably getting old, fortunately, it is located on the inner side of the North Third Ring Road, it has the advantage of being adjacent to the urban area, convenient transportation, and 32 years of continuous operation to build the brand, still attracting the attention of merchants and citizens and tourists from all over the world.

The Science and Technology Expo, which has a history of 18 years, is one of the most eye-catching business cards.

The full name of the science and technology expo is the International Science and Technology Industry Expo, the organizers are the State Council for the Promotion of International Trade, the Ministry of Science and Technology, the Intellectual Property Bureau and the Beijing City Government, with a strong official color and foreign trade tendency, and the visitors are mostly representatives of domestic and foreign enterprises, and then the citizens who rest on weekends. In other words, this is also an important advantage of living in a first-tier city, and various special exhibitions emerge in an endless stream, which subtly broadens your horizons.

Nowadays, the Internet is connected to the world, and business can be finalized directly online, and the limelight and popularity of traditional exhibitions are not as good as they used to be. Large-scale exhibitions still have irreplaceable advantages such as on-site experience, collecting user feedback, and centralized media reports, and merchants from all over the world, including bees, are still keen to sign up for excellent exhibitions.

They took a lot of products this time, 2B (toBusiness, for enterprises), 2C (toCustomer, for consumers), 2D (toDeveloper, for developers) have, a wide variety, not only in many exhibition areas have rental booths, but also outside to get an outdoor booth, planning to put a few large-sized fat baby robots, to ensure that passers-by can see from afar, absolutely eye-catching.

According to the schedule, the science and technology expo will not officially start until the 8th, and the previous 6th and 8th are the exhibition time left by the venue for exhibitors. However, the 7th is a little troublesome, this day is the annual college entrance examination day, when the whole city will enter the "silent state" under the gaze of the parents of 120,000 candidates, the car does not honk, the dance does not dance, the cicadas drive away, and the outdoor construction must be suspended for a few days.

In order to facilitate transportation, these large robots weighing several tons are dismantled into several pieces, which need to be installed and debugged on site, and the ground must be specially reinforced, which will inevitably make noise.

Therefore, when the audience who visits the light and sound exhibition walks into the International Exhibition Center, they will find that there is a two-storey blue greenhouse in the square in front of the door, which is tightly covered and looks quite mysterious. It's a pity that there are security guards at the door, and no matter how curious they are, they can't get a glimpse of it.

After carefully checking the tag hanging on their chests at Atletico, a security guard bent down and took out two hard hats and matching noise-cancelling headphones from the box next to them, handed them to the two of them, and motioned for them to put them all on before entering.

Hard hats are standard equipment in construction sites, but headphones are an added benefit for large dog owners. In order to protect the ears and spirit of the construction personnel, the on-site manager urgently transferred a batch of active noise cancelling headphones and sent them to the on-site staff, and anyone who entered the shed should wear a pair.

After putting on the helmet and headphones carefully, Atletico and Zhu Lingling finally got permission to lift the curtain and walk into the greenhouse.

Passing through the tortuous passage, Huo Ran opened up in front of him, and at the same time there was a faint wind and a sharp and piercing sound in his ears, the wind sound came from the air conditioner, which was effectively suppressed by the headphones and became undetectable, and the scream came from the cutting machine, and the ANC active noise cancellation system said that it had done its best.

ANC is not a panacea, its negative waveform cancellation is more suitable for dealing with regular monotonous low-frequency noise, and it is less effective against high-frequency noise at a sharp level, even with headphones on your head, there is still a quarping sound that creaks into your ears from time to time. Fortunately, after layers of reduction, this part of the noise has become less unbearable.

Turning her head to look around, Zhu Lingling soon saw a scene of hot work, a group of workers in blue overalls cooperating with each other, spreading pieces of parts on the ground, and then welding them together, a huge metal platform was already close to forming.

The floor tiles in the square are not very resistant to pressure, but the bees plan to put it outside is a large guy weighing several tons, in order to avoid crushing the ground and destroying the painting style, they specially laid a cushion on it, and then put the assembled metal stage to ensure that it is foolproof.

The site manager had already known the news of Atletico's arrival from the system, and as soon as the curtain was lifted, he trotted over with the foreman of the construction company to say hello.

After looking up and down, left and right, Boss Ma asked, "How is it?

The manager replied: "It's okay, the company is well prepared, the team here is all veteran, it's going well, and we should be able to complete the site construction in the evening." The equipment has been transported to a nearby warehouse and will be installed early tomorrow morning. ”

Atletico looked at the foreman, who was equally confident: "Don't worry, it's not a difficult job, and it's guaranteed to be completed on time." ”

Nodding, Atletico Madrid issued a panacea of all instructions, "Be sure to pay attention to safety, and be careful of noise, I don't want bees to disturb the news because of noise." ”

"Don't worry, I'll keep an eye on you," the manager reassured, straightening his back.

"That's good," he circled around the periphery again, and then flashed away. The people who work here are all third-party people, and it is only right to complete the project on time and settle the payment on time, and there is no need for his speech to encourage him.

Atletico Madrid came here specifically for a spin, in fact, because of the way. His real destination is actually in another place, where the Bee Mirage team has encountered some technical problems and urgently needs the fire support of Chief Scientist Dr. Ma.

Half an hour later, Atletico pushed the table, the chair under the seat slid backwards, and said lightly in a very high-spirited manner: "It's done, you guys will take a look!"

Hearing his words, the crowd of onlookers immediately dispersed and walked towards the large table not far away.

The table was in a peculiar shape, with a huge table top nearly two meters long that was actually a whole projection screen, with a horn net on the outer edge of the table, and hemispherical trackers like black strawberries standing in the corners.

Sensing that someone was approaching, the desktop immediately lit up, and a starry sky picture appeared on it, with strangely shaped asteroids, high-speed flying spaceships, strange antimatter weapons, and tragic high-speed impacts, and a scene of space clearing was staged.

What is surprising is that this scene is three-dimensional and out of the screen, with asteroids spread above the screen, spaceships shuttling through it, and the explosion effect is obvious on the screen, and the whole scene looks full of sci-fi.

Of course, for the bees who have seen Bee Glasses 3 and even Holo1, such a scene is no stranger to them, so they can still remain calm and only put a faint smile of joy on their faces.

After turning around the table and confirming that the display was completely normal, everyone extended their thumbs to Atletico Madrid, "The boss is out of the horse, a top two, it was really easy to get it!"

Atletico Madrid also came over at this time, pointed to the black strawberry on the corner of the table and said, "Actually, it's not a big problem, it's that the previous system code is too rough, everything is normal, it's okay to say, if you encounter an abnormal situation, it may be an error and hang." ”

Looking in the direction of his finger, someone soon noticed that the tracker was slightly out of position, and it was not as accurately fixed in the corner of the table as the other three, and it was immediately shut down and reinstalled.

"No need," Atletico waved his hand, "I wrote an automatic correction program for you, and the base station offset is detected and automatically corrected, so you don't have to remove it and reinstall it." ”

"Oh!" Hearing this, everyone immediately breathed a sigh of relief, the most troublesome opponent of this set of equipment is these four positioning base stations, because it is necessary to accurately track the relationship between the user's eyes, the accuracy requirements are particularly demanding, and every disassembly and assembly is very annoying. Someone wanted to write an automatic correction program before, but unfortunately the workload was too large, and it was not finished until now, but the boss only took a quarter of an hour to get it done, and sure enough, people are more dead than people.

"Actually, it's not troublesome," Atletico turned into a software engineering teacher, waved away the tanks and planes, and explained his programming ideas directly in front of the screen.

As those siege lions listened with relish, Zhu Lingling blinked depressedly.

Reaching out and taking off her glasses, the codes, characters, and charts disappeared from her eyes.

It wasn't quite accurate to say that, but the things didn't disappear, but collapsed, stacked on top of each other, creating a white picture full of ghosting and unable to see the details in front of her eyes—sixteen photographs were rotated and superimposed, and naturally a mess.

The desktop screen is actually a special projection screen, which is equipped with a ring-arranged 3D projector underneath, and the sixteen images that have been polarized are projected on the screen from bottom to top, filtered by polarizing glasses on the user's face, leaving only one of the groups to shine on the user's left and right eyes, relying on the parallax between each other to form a 3D vision out of the screen.

However, this is only 3D, not holographic.

The biggest problem with parallax display is that the effect is limited by the angle, and the farther away from the central axis, the worse the stereoscopic effect. This is especially true on TVs and mobile phones with relatively small screens, so devices that support glasses-free 3D, such as Amazon's FirePhone and Nintendo's 3DS, require a dedicated eye-tracking camera to ensure that the display is always the same.

Although the bee uses glasses to distinguish between the left and right eyes, it also uses tracking equipment, and the engineers specially plugged black strawberries into the table and installed four sets of infrared positioning base stations. The latter can achieve extremely high-precision spatial positioning, accurately tracking the position and orientation of each pair of glasses and transmitting them to a graphics computer, which then feeds the results of the real-time calculations into the projector, so that no matter which direction the user is standing and looking at the screen, he can see what he should see, thus creating a pseudo-holographic effect that looks like reality.

Of course, if you can look at the edge of the screen, you will find that those suspended codes and charts will only appear in the middle of the screen, but there is little text on the edge, and even if it appears, there is not much effect on the screen, which is the bottleneck of 3D projection.

The reason why the team built such a large table was to cover up this flaw. As long as no one intentionally reminds it, it is difficult for ordinary people to find this, and the appearance of this "holographic sand table" three days later is extremely exciting.

That's right, this product is the "black technology" prepared by Bee Mirage for the science and technology fair the day after tomorrow.

Holographic technology is recognized as "future technology", which frequently shows its face in various science fiction works, and has a high degree of recognition and attention among ordinary audiences, which is extremely suitable for pretending to show its face. And the bee's own movie "The Wandering Earth" that is being released also has a lot of holographic technology scenes, and playing the holographic card at this time can also help the latter to pull another wave of popularity after two weeks of release, so they didn't hesitate much, and chose the holographic sand table that is standard for the future headquarters.

It's a pity that the real holographic projection technology is still in the laboratory research and development stage, and the products on the market that advertise holograms can only achieve partial effects. The holographic glass scheme of the inverted LCD screen with the transparent quadrangular pyramid is the lowest, but the effect is also the worst, the bee has used this scheme before, but now it is not good to look at this already rotten street technology, and then choose a more technical intelligent projection solution.

In fact, there is a more easily implemented solution, that is, Bee Mirage's own Bee Glasses 3/Holo1 holographic glasses, both of which can superimpose virtual objects on the real screen to form a holographic display-like effect, and the latter is even more holographic glasses that can be interconnected with each other to achieve the same effect.

Seeing that Atletico Madrid finally finished teaching, Zhu Lingling threw this problem to her boss, "You can achieve the same effect directly with smart glasses and a graphics computer, why do you have to give up the easy way?"

Atletico tilted his head to look at the female assistant, "That can indeed be done, but the question is have you thought about the cost?"

The manufacturing cost of Bee glasses 3 is more than 10,000 yuan, and the cost of holographic 1 glasses is several times that of the former, and the cost of the whole system is 100,000 yuan. Of course, there is no problem with a simple demonstration, but Bee Mirage has greater ambitions and plans to industrialize the electronic sand table, so it is necessary to choose a cheaper solution.

The majority of the cost of the 3D projection solution lies in the projector, and the high-performance micro-projection equipment, although not cheap, is much better than the two glasses that use optical waveguide lenses in terms of unit price and producibility. Moreover, its matching glasses are just simple polarized lenses, and the production cost can be as low as a few dollars, which is obviously more suitable for commercial use.

(End of chapter)