Cast a spell from a distance and condense the wind blade directly from more than ten meters away, instead of condensed the wind blade in front of you and then flew out.

Don't think that it's a different way of casting, it's a qualitative change.

Teacher Chen fell into memories. When did he start to master remote casting?

The only audience member, Yang Xiaozhu, asked in a chattering voice: "Teacher, is it difficult to cast spells remotely?"

Chen Wenxin smiled, "You try to condense a wind blade first."

Yang Xiaozhu thought about it and used a small spell and a small fixed technique to fix the small ghost five meters away.

Chen Wenxin had a black line at the end, "It's not a small spell, it's a real spell. Small spells are all simplified toys."

Yang Xiaozhu tried again, and could only condense the wind blade within one meter in front of her; no matter how far she was, she could not control it.

"What's going on?" Yang Xiaozhu exclaimed.

Chen Wenxin opened his mouth: "How many parameters and coordinates are needed to determine the position of a point in three-dimensional space?"

Yang Xiaozhu immediately said: "Three parameters, three coordinates."

Chen Wenxin asked again: "What if I want to determine a straight line?"

"At least six parameters, three coordinates."

Chen Wenxin asked again: "What if it is a geometric body?"

"It takes at least four points, 12 parameters. But there are still 3 coordinates. I understand!" Yang Xiaozhu suddenly realized, "Three-coordinate system! If you want to cast spells remotely, you need to build at least three coordinate systems. If you want to build a three-coordinate system, you need to improve the wind of perception, which requires three frequency bands!"

Yang Xiaozhu finally looked at Chu Fei in surprise, "Have you mastered the perceptual wind of three frequency bands?"

Chu Fei nodded, "I realized it only in the morning."

Yang Xiaozhu was a little silent.

The three basic spell sets: Perception of Wind, Wind Blade, and Wind Wings. Perception of Wind is the basis of everything.

This is easy to understand.

Only when ordinary people can see the world with their eyes, can they change the world.

The wind of perception is the "eye" of spells.

But the wind of perception also has levels.

The initial wind of perception only has one frequency (sonic wave), and everyone can only feel a vague world.

With two frequencies, you can feel a clearer world.

But the world is still gray and hazy.

Only by mastering the three frequencies can the wind of perception be "preliminary to achieve success", possess nearly supernatural powers, and have powerful practicality.

But it is a bit difficult to master three frequencies.

The data that needs to be processed in three frequencies is four times that of two frequencies - at least.

In fact, the human brain's processing of data is not a simple binary system.

The increase in data is not a simple increase in data, but also changes in calculation methods and data structures.

From two frequencies to three frequencies, it is a qualitative transformation, a transformation from plane to three-dimensional.

Yang Xiaozhu bit her lip and tried to superimpose the perceptual wind with a frequency; but just after trying, her head became dizzy - overloaded!

Yang Xiaozhu's mental power is not enough to withstand the load of three frequencies.

Yang Xiaozhu was a little unwilling to accept it, "Why can the small spell be released remotely?"

Chen Wenxin smiled and said, "The reason why small spells are small spells is because they are all two-dimensional structures.

Try it, does the small spell only point in the only direction and cannot move up, down, left and right at will.

Although there are some three-dimensional data in the small spell, they are all applied formulas and some fixed data, borrowing natural parameters to simplify the brain's calculations.

But the real spell is not.”

Yang Xiaozhu immediately reviewed the small spells and found a problem. In the small spells, the data in the vertical axis are all natural parameters, such as gravity and pressure. These data do not require additional calculations.

Chu Fei also reviewed the small spells, but finally had to exclaim: "The small spells are simple, but the people who design small spells are not simple.

To use natural parameters to simplify human calculations, considerable scientific foundation is required.

Sure enough, the more I know, the more I feel my ignorance.”

Chen Wenxin nodded, with a little emotion in his tone, "I wanted to try to design a small spell some time ago, but I couldn't start."

Yang Xiaozhu said thoughtfully: "Is this like an idiom?"

The idioms look simple and easy to understand, and can express a huge amount of information in four words.

But behind every idiom there is a huge story background.

Idioms are actually an alternative data compression package.”

Chen Wenxin smiled again, "Yes, idioms are an alternative compressed package. This is a compressed package of wisdom. Behind each idiom, there is a period of Chinese history.

OK, Chu Fei, let’s continue training. But we will add a new training program.

Xiaozhu, look carefully.”

Yang Xiaozhu pouted.

Chen Wenxin waved his hand, opened the virtual management software, and closed Chu Fei's visual system.

Chu Fei was suddenly "blind".

Chen Wenxin's voice was serious: "Chu Fei, since you have mastered three kinds of sound waves, try to replace your eyes with the wind of perception and change your past habits.

The limitations of the eyes are too great.”

Chu Fei nodded silently.

The complete disappearance of vision is conducive to concentrating and stimulating all the perceptual wind.

The sound waves (frequency) of three frequencies spread out, scanning massive amounts of data, mathematical formulas flashed through my mind, and powerful mental power completed the calculation and finally restored to an image.

The perceptual wind at three frequencies has a powerful vision. This is still a black and white field of vision, the difference is that it is too clear.

At this time, what is "perceived" is no longer a vague, hazy, and line world, but a three-dimensional world.

Chu Fei could "see" Chen Wenxin's clear outline, see Yang Xiaozhu's movements, and see hazy light and shadow flying by in the sky - this is a ghost.

Chu Fei's perceived wind eventually expanded to a radius of 20 meters and stopped.

No matter how far it is, it begins to be hazy and blurred.

On the one hand, there is insufficient mental power, and on the other hand, the longer the distance, the larger the data volume, and the exponential increase, the brain cannot calculate it.

With Chu Fei's mental power, he felt dizzy when he wanted to calculate the amount of data 20 meters away.

However, if the 360° field of vision is cancelled and the mental power is concentrated in front of one third, the distance of the perceived wind can be increased to 30 meters.

Chu Fei silently felt the new wind of perception and also discovered a problem - roughness.

Due to the wavelength of sound waves, the perceived wind can only feel the general outline, and cannot clearly see the subtleties such as face, hair, and wrinkles of clothes.

It's like a vision under the dim moonlight - you can see the outlines clearly, but you can't see the details clearly, the world is gray and white without color

The wavelength of visible light is about 390nm-780nm, so the resolution of the eye can reach 1 billion pixels.

But the wavelength of the sound wave is very large.

Chu Fei can only master primary ultrasonic waves now, 20,000 Hz, calculated by the sound speed of 340 meters, which is equivalent to a wavelength of 17mm.

Therefore, the resolution of the Perception Wind is very low.

Fortunately, the human brain has strong image processing capabilities and the continuous "refreshing" of sound waves, so there is no need to see the "pixel world". However, the details are inevitably blurred.

Chu Fei kept adjusting the calculation methods and mathematical formulas, and finally condensed a wind blade with his eyes closed.

The wind blade is very big, half a meter; but its power is pitiful.

The wind blade flies away from control; and because the perceived wind cannot be accurately positioned, the data errors, the data model collapses, and the wind blade also collapses.

Chen Wenxin gave advice beside him.

"It's done well. But you still have the habits of the past. Forget your eyes and change your thinking.

So many people have succeeded, which means that this matter is very simple.”
Chapter completed!