Witch Special

Taking into account the need to start digging multiple tunnels at the same time, Lin Zhenxi summoned a total of three engineering teams consisting of chess dwarves and digging moles. Each team consisted of ten digging moles and five chess dwarves.

The digging mole is the fastest summoned familiar under Lin Zhenxi in digging tunnels besides the sniff, but they are only good at digging soil, not good at digging holes, that is, they dig in front and bury in the back. Their main feature is to leave no way for themselves to retreat. At this time, the chess pieces, the dwarves, are needed to take action.

The chess dwarves are able to use simple civil engineering magic. This seems to be an instinctive talent for them. Even if their talent for other magic is zero, it does not affect their ability to reinforce the loose soil to form a tunnel with a stable structure that they can pass through.

So basically, the digging mole digs in the front, and the chess dwarf reinforces the inner wall in the back. With the cooperation of these two kinds of familiars, they can quickly dig the underground of the Time Square into many connections.

After summoning the three tunnel excavation teams, Lin Zhenxi mapped out their digging routes and sent them off to work. This world wasn't very repulsive to summoned creatures, so Lin Zhenxi didn't need to expend much mana to maintain them. Moreover, if their mana ran low, they could simply return to the mana generator to replenish it, so there was basically no need for Lin Zhenxi to worry about it.

Looking at the three holes, each about one and a half meters in diameter, that had appeared on the wall of his temporary shelter, Lin Zhenxi nodded in satisfaction. Very good, things were proceeding as planned.

Next, Lin Zhenxi began deploying a surveillance system covering the entire Time Square and Orc Canyon. Although the orcs were completely unaware of Lin Zhenxi's presence, she was determined to completely control this area. She could remain silent, but she needed to be aware of everything happening here and respond quickly.

She planned to drop some enhanced Eyes of Truth with invisibility capabilities over the area. From a high vantage point and with few obstructions, these Eyes of Truth would have a great field of view.

The Eye of Truth was even easier to create. These eyes could even draw magic power from the air. While this didn't necessarily keep up with the rate of its consumption, it greatly extended their existence, essentially allowing them to be left alone, requiring only regular replenishment. The only cost for Lin Zhenxi to deploy these eyes was the magic power required to summon them.

Now Lin Zhenxi is familiar with the process of summoning the Eye of Truth. The only problem is that the perspective switching of the Eye of Truth will deprive Lin Zhenxi of his own vision. This is a characteristic of magic itself and actually has little impact. But that was when there was only one magic eye. Now Lin Zhenxi summoned dozens of them in one breath. If he checked them one by one, the efficiency would be very low.

So Lin Zhenxi had to transfer the perspective of the Eye of Truth from himself and integrate it into a display screen, making it something like the large screen in the monitoring room.

This wasn't a difficult improvement, at least that's what Lin Zhenxi thought at first. She easily transferred the image of the True Eye, no longer having to project it onto her own eyeballs. But then, she unexpectedly encountered a problem.

Actually, it’s not a difficult problem, it’s just a little different from what she originally thought.

Because when she actually transferred the image from the Eye of Reality, she found that the viewing angle of this thing was actually a curved surface, which looked like a VR lens with a fixed viewing angle. If it had to be displayed on a flat surface, the image would become very abstract.

Therefore, Lin Zhenxi's plan to use the Water Mirror Spell to carry the image of the Eye of Truth was declared bankrupt on the spot, and the idea of ​​combining multiple screens into one also failed, because she couldn't create many curved surfaces on one screen, it would look too weird.

Looking at the difficulties she faced, Lin Zhenxi scratched her hair in distress. She really didn't expect that she would be stuck in this place. It turned out that you won't realize the difficulty of many things unless you do them yourself.

Think about it, why can surveillance cameras capture images as a flat surface, but they themselves are curved?

It's probably a decoding problem. Maybe I can solve this problem by adjusting the picture parameters.

But what to do next is really difficult for Lin Zhenxi. She only graduated from high school. Although her college entrance examination score was quite high, she did not continue to study at a university but directly started working. Therefore, her knowledge of science is actually relatively shallow, and she does not know any slightly profound theories.

If it were in the past, she might have been completely lost. But now, she had a portable encyclopedia, and the Book of Truth should have the ready-made answers to such image decoding problems.

So, here comes the book... no, here comes the cat!

Lin Zhenxi picked up the black cat who was sleeping in a ball on the ground after watching Lin Zhenxi busying around and finally felt sleepy. She shook her awake like shaking a towel, and then asked her to quickly transform into the form of the Book of Truth and solve the problem she was facing with the black cat's dissatisfied meow.

Black Cat reluctantly put on his little hat and monocle, and his demeanor suddenly changed from lazy to smart, and he looked much more reliable than before.

Hayashi Maki's problem wasn't so much how to decode the image as it was how to flatten a curved surface into a flat surface while preserving the lines' shape. This was essentially a mathematical problem, naturally within the scope of the Book of Truth.

The formula that Black Cat provided to Lin Zhenxi was really complicated. With Lin Zhenxi's shallow high school mathematics knowledge, he couldn't understand the specific meaning of the various symbols in this series of functions. Black Cat, who had now transformed into a super academic master, had to explain it to Lin Zhenxi bit by bit.

This gave Black Maomao an opportunity to criticize Lin Zhenxi, and she belittled Lin Zhenxi as if pigs were smarter than her. Lin Zhenxi was so angry that she grabbed Black Maomao in her arms and rubbed her until she rolled Black Maomao into a round ball.

This broken cat, if you give it a little color, it will start to become a dye factory. If you don’t clean it up properly, it will immediately forget its own name.

After Rua the cat, both the man and the cat straightened their attitudes and began to seriously study how to apply this formula in practice.

Lin Zhenxi's current mental strength didn't quite elevate her IQ, but her comprehension skills had indeed improved significantly compared to her early school days. Even with advanced applied mathematics, which was completely beyond her scope, under the personal guidance of the Black Cat, the Book of Truth, she quickly grasped its mysteries and was able to put it to practical use.

Of course, this is only limited to image expansion. If you change to another thing, it will not work and you will have to learn it again.

After mastering the technique of flattening a curved surface, Lin Zhenxi began modifying the True Eye's image display parameters, then simultaneously modified all of the True Eye's magical engravings. After this series of operations, she once again connected the True Eye to the Water Mirror, and obtained a clear image that filled the entire screen.

Uh, round.

Whose surveillance camera has a circular screen? Lin Zhenxi had to modify it again, cutting off the corners to make the screen a square.

Now it looks much more comfortable.

However, problems arose when trying to make a water mirror display multiple images at the same time. This was because the Water Mirror Technique was a very basic magic with a very low upper limit. It was completely unable to accommodate the transmission of so many images from the Eye of Truth at the same time. In fact, it didn't even have the bandwidth to display two images at the same time, and it simply collapsed.

Lin Zhenxi was dumbfounded. What the hell was this? Why was it suddenly so difficult for him to do something?

The problem with the Water Mirror Technique is that it's not mysterious enough. It's like using a broken CRT monitor to play 2K or 4K ultra-high-definition videos. That's simply too much to ask. If it doesn't explode, it should be considered of high quality.

As for the Water Mirror Technique, its nature is more fierce. It will explode without hesitation and without any ambiguity.

Fine……

Improving the Water Mirror Technique is not easy. It is almost equivalent to developing the Fireball Technique into the Explosive Fireball Technique. This is not a simple matter of increasing the volume and the amount of magic power invested. It also involves the concept of adding the magic core. Anyway, Lin Zhenxi is too lazy to do it.

Instead of improving the Water Mirror Technique, Lin Zhenxi chose another simpler path, which was to maintain multiple Water Mirror Techniques at the same time and then piece the images together.

Since it is impossible to split a single screen and display it simultaneously, why not put multiple screens together? That should be fine, right?

Anyway, the raw material for maintaining the Water Mirror Technique is only water besides magic power. After Lin Zhenxi connected them to the magic generator, he placed a bucket underneath them. You can use as much water as you need.

Thus, a large surveillance screen composed of dozens of water mirror techniques was newly unveiled. Lin Zhenxi stood in front of the screen, looking at the scenes of the Orc Canyon and Time Square displayed on it, and nodded with satisfaction.

The display of this thing is much clearer than the glass altar. At least you can see the colors clearly, and the vision of the Eye of Truth will not be disturbed by the energy radiation of high-energy targets.

Lin Zhenxi soon realized that the uses of this high-altitude monitoring system go far beyond this. Think about the ubiquitous surveillance cameras in society. These real eyes have the potential to develop in that direction.

The "Sky Eye" system is very promising.

Unfortunately, the Eye of Truth can only see but not hear. Lin Zhenxi thought that if she could find a way to collect the sound waves as well, she would be able to know what the people in the picture are saying at the same time.

Installing a vibration collector on the Eye of Truth? That's unrealistic. The Eye of Truth operates tens or even hundreds of meters in the air, and sound propagation at that altitude is already greatly weakened. If sound collection is desired, it's best to find a way from the ground.

Or, can we develop a special auxiliary system, spread in low-altitude environments, which is also invisible and only responsible for collecting sounds?

It seems like there is a way...