The whole world thinks I'm a scumbag

Gu Fangwei didn't sleep for a long time. When he woke up, he found that Lu Xingyin was coughing. Although the voice was very low, and he covered it with his hands and put it aside, the muffled cough still reached his ears.

He checked the time, 04:30pm.

Huang Feijian and Yi Qingyang lay across the table with their heads tilted, sleeping soundly.

Lu Xingyin is next to Gu Fangwei. Half of the computer screen is the characters and scenes hanging in the game, and the other half is the translator and search box. There is a silent university open class on it. There is no sound, only subtitles.

Lu Xingyin quietly stared at the subtitles on the computer screen, and lightly pressed the space from time to time to stop the screen, then lowered his head and lightly copied with a pencil.A fair and clean young man, especially when he is concentrating, he looks well-behaved and calm.

The air conditioner was turned on in the Internet cafe, it was hot and stuffy, and his throat would feel dry after sitting for a long time, Lu Xingyin squeezed his throat, took a deep breath, and just when he was about to continue, he felt someone lightly touch his cheek .

Gu Fangwei propped his cheek with one hand, tilted his head to look over, gently pinched his face with the other hand, and said in a deep and gentle voice: "Play when you are tired, I will change places with you, you can sleep by the window for a while?"

Lu Xingyin shook his head, but Gu Fangwei had already stood up, holding his shoulders and pushing him in: "Go to sleep, if you get sick, it's because my brother will watch you get the injection."

He left a gap for the window to breathe for him, and then went out for a while.Lu Xingyin thought he was going to the bathroom, but after a while, Gu Fangwei bought some snacks such as milk tea, French fries and fried chicken and came over to him. Get up and laugh: "Good boy, learn secretly while I'm asleep, we Xiaolu still have a big brother in our hearts."

Lu Xingyin stopped writing, and concentrated on eating the fried chicken nuggets slowly, when Gu Fangwei asked him: "Where did you see it?"

"Still looking at the physics engine algorithm."

Gu Fangwei frowned, and thought for a while: "Ah, this...you don't have to read it carefully, you just know about it. Or I thought about it, don't read these books and public lectures, I will take you directly Get started with the hardware part."

Lu Xingyin was a little puzzled: "Don't you need to watch it?"

"It's because I didn't think carefully. It's not easy to read all these things, and you don't know which are the key points." Gu Fangwei said, "We don't need to write the physics engine algorithm by ourselves. The current modeling tools have It is relatively complete, it comes with itself, this thing is our tool, not our core. Of course, sometimes it is not perfect, but this part is done by me, so you don't need to waste time like this. "

He thought for a while, and suddenly he had a flash of inspiration: "Brother, can you tell me directly what you are responsible for? If you encounter something, learn accordingly, and make your own learning tree."

Lu Xingyin looked at him suspiciously.

"That's the decision. Feynman's learning is also like this. Like him, you are just repairing the radio from a young age. Then you are a little Feynman, and you don't need to learn so rigidly."

As Gu Fangwei said, he took out the paper and said to him: "Brother, tell you first, can each of the components and functions of the little robot be good?"

Lu Xingyin was a little sleepy, but he still listened with his chin resting, he moved a little when he asked, and said, "Okay."

Gu Fangwei watched him carefully while talking——Lu Xingyin rested his chin on both hands, and the whole person was nestled on the seat, leaning against the window for support, his normally clear eyes were half-closed at this moment, and he looked like he was going to sleep , made Gu Fangwei very nervous, he would poke him every once in a while, pinch his face, and feed him a piece of fried chicken. Just as he continued, Lu Xingyin managed to stay awake through his lecture time .

Lu Xingyin gradually discovered that Gu Fangwei was fundamentally different from the vast majority of students in learning—regardless of arts and sciences, the vast majority of students only thought that "learning" was "learning", and the content of learning itself and practice were strictly different. Separated, there are several years between the school time and the time when they may engage in related industries in the future.

For example, in science, many students feel that it is a waste of time to memorize the principle of electrolysis. In the hands of people with repair experience such as Gu Fangwei or Lu Xingyin, it is indeed the principle of electrolysis required for electroplating; The master was asked about the relevant content of the knowledge point, and they couldn't tell the reason, they only knew when to use which tool.

For him, all knowledge has no sacred aura, nor does it have the utilitarian value of "exchanging points". Gu Fangwei knows all of this, but it is only part of using knowledge as a tool.He has no sense of superiority or a condescending attitude, so he can accept Lu Xingyin's current lack of knowledge calmly, and he doesn't care which school or class he is in.

In the eyes of others, this kind of attitude will probably appear frivolous and incomprehensible.

Gu Fangwei was talking to him, and Lu Xingyin tried his best to follow. Afternoon and night passed, Lu Xingyin was thinking while brushing the tasks, and finally looked at the power design part of the first version of the small robot given by Gu Fangwei.

The design made by Gu Fangwei is very delicate, and there is nothing wrong with it directly, but the robot can't stand up, so in desperation, it was replaced with a large-chassis spherical shell design.

Lu Xingyin looked at many places, and occasionally he had doubts when he didn't follow Gu Fangwei's solution.

The last two people did not discuss any results. Lu Xingyin tried his best to keep up with Gu Fangwei's thinking, but still did not find a clear solution.

Gu Fangwei saw that he seemed to be in a hurry, so he took the pen back from Lu Xingyin's hand first: "Let's do it today, don't worry."

Lu Xingyin looked at him.

Gu Fangwei said with a low smile: "Brother is not forcing you, you don't have to work so hard. No matter what you do, you always look desperate, how tired you are."

Hearing what he said, Lu Xingyin closed the translator to check the webpage, and let out a sigh of relief.

It's already ten o'clock in the evening, and the night sounds so long.Yi Qingyang and Huang Feijian were still yelling and playing games opposite each other, while Lu Xingyin followed Gu Fangwei's example and slept by the window for a while.

Sleeping and waking up, in fact, I didn't sleep well.

In the middle, he was called up to eat again. Gu Fangwei got him pizza and spicy wontons from somewhere, but they were not available in Internet cafes. After Lu Xingyin ate some, he still felt sleepy and tried to shrink himself. get up and sleep.

Finally, I stayed up until seven o'clock in the morning, when I returned to the computer.

Gu Fangwei smiled at the sleepy Lu Xing: "How about it, why don't you play games at home with your brother?"

Lu Xingyin didn't bother to pay attention to him.

A few boys bid farewell at the entrance of the Internet cafe, Yi Qingyang and Huang Feijian hurried to have breakfast, and then went back to the dormitory to catch up on sleep, Lu Xingyin followed Gu Fangwei back to his small rental house.

Lu Xingyin was sleepy, didn't sleep well, his eyes were drooping, red, watery, and the black eyelashes were stained with small tears, moist and hazy.

Coming out of the air-conditioned room and getting cold, Gu Fangwei grabbed his fingertips and put them in his trouser pockets. The two of them huddled together in the cold and trotted back to the rental house.Lu Xingyin took a hot bath, then climbed directly onto the bed, and only then did he really have a good night's sleep.

The two spent their time together on weekends. Later, Lu Xingyin almost had an understanding of what Gu Fangwei was doing to them, so he no longer needed his explanations and guidance, and began to search for information on his own. .Gu Fangwei continued to improve on his existing research.

It was also at this time that Lu Xingyin slowly discovered that Gu Fangwei actually talked a lot sometimes.Like every boy of his age, he talks endlessly about the things he likes, and occasionally, when facing him, he will roll around like a baby and do everything he can. Compared with the free and undisciplined "brother" at the beginning, he is also a change. Quite a lot.

He gradually learned more about Gu Fangwei and the hardships Gu Fangwei suffered on this robot. He showed him the scars left on those slender and beautiful hands: "It is the first time to use a 3D printer to make materials. , At that time, what I could borrow was not called a 3D printer, but a rapid prototyping SLA. That thing was very precise. If it was made completely according to geometric modeling, the edges would be very sharp. You can see that my wound was left at that time. "

He held out his hand to him proudly, as if showing some kind of medal, and the cool, slender and strong fingertips covered his fingers, childish and natural.

Gu Fangwei became interested, pinched his fingers to play around, Lu Xingyin just looked at him quietly, with a gentle smile in his eyes.

On Sunday afternoon, they returned to school for evening self-study, and the two of them bought some snacks to take to school.

Lu Xingyin sat on the desk and started self-study as usual, while preparing for the content of the monthly exam. The students of class 27 also came over one after another, studying quietly as before.

Lu Xingyin was sleepy again—he was forced to squeeze labor by Gu Fang these days, he rested intermittently, and his work and rest schedule was completely disrupted.

He stood up quickly, took the vocabulary book and pushed open the back door, intending to go outside to stand and endorse.

Gu Fangwei was flipping through his phone, looking up the answers to a basic question he asked a professor, when he suddenly looked up and heard Lu Xingyin ask: "Brother, can I step on your desk."

He was sitting on the inside, the front door was far away, Gu Fangwei said casually: "Okay."

He laughed again: "You're still so polite."

Lu Xingyin then used two discarded draft papers as a pad, stepped on the chair and table and turned over, and then gently closed the back door.

Qu Jiao was so sleepy that she yelled outside: "Little calculator, help me to see the teacher, I will sleep in 10 minutes."

Through the back door, Lu Xingyin's voice came dimly: "Okay."

The corridor was empty and deserted, he whispered the words, the small warm voice seemed to float intermittently through the setting sun shining on the ground through the leaves.

Gu Fangwei read and listened to the email, and occasionally corrected his pronunciation.

The back-shaped teaching building is quiet, the night is slowly falling, and in the silent corridor, even the grade group committees who are usually on duty have not come

It was very quiet today, Lu Xingyin was carrying books outside, and noticed something abnormal in the grade group office on the first floor - some teachers were moving things in and out, as if they were changing offices.And the office on the first floor, which should be brightly lit during evening self-study, is now nearly half of the place with lights off, making it even more empty and lonely.

Some teachers did not come.

Lu Xingyin paid attention to this first, and then saw the head of the grade group and the deputy head meeting on the first floor to discuss something, with a worried look on their faces.Some parents were also waiting outside.

Lu Xingyin withdrew his gaze, and continued to read an article.Highlight new words.

"lash, verb, slam, whip, whip; noun, whip as punishment, whip tip..." Lu Xingyin recited here, and suddenly paused, recalling what he heard in the lecture that was interrupted by Gu Fangwei yesterday. of a word.

Backlash.

"backlash, strong resistance (to social changes, etc.), collective opposition." He turned to the information of this word.

Lu Xingyin pondered for a while, then walked back, and softly called to the crack of the door: "Brother."

Gu Fangwei's voice floated out from inside: "What's wrong?"

He stretched out his hand and opened the door a little bit, and the cold air came in, bringing a young man's soft voice: "backlash is in the control system, what does it mean? I saw this word yesterday, but it seems to have a different meaning from the dictionary. "

Gu Fangwei thought for a while: "This is a kind of jargon. It's a bit like describing something dangling and twisting. For example, the relationship between a numerical control bearing driving a gear, in terms of movement time and distance On the surface, it should be linear. But in actual operation, there will be a gap between the bearing and the gear, and the friction of the smooth mechanical surface is too small or other factors will cause this relationship to become nonlinear. That is to say, The whole response is not real-time response. Generally speaking, the solution is to debug the control algorithm, and after erasing this error value, let it return to linearity.”

"That is, it's a bit like the backlash we talk about when repairing things," Lu Xingyin asked softly, "Brother, in your first version of the little zombie, there are some such things as the universal wheel and the splicing surface...Backlash, you can debug this ever?"

Gu Fangwei was stunned for a moment.

"No, the selection of universal wheels in the design strictly refers to the torque that the motor can provide. I forgot about this." Gu Fangwei's eyes lit up, "This should be the problem! You are a genius, little calculator."

Lu Xingyin said softly: "It's not necessarily true, you can go back and have a look."

Gu Fangwei stretched out his hand and opened the door, followed by getting out.

Lu Xingyin stood outside the corridor, opened his eyes wide, looking at him with some surprise.

He thought he was in such a hurry to rush back to make adjustments, but he saw Gu Fangwei narrowed his eyes, stretched out his hand and directly pressed him into his arms, hugged him and turned around twice, the smile in his eyes seemed to overflow.

The warm white mist drifted away, Gu Fangwei put him down, and then patted his head vigorously: "Wait until you go back and watch together. Let's study first, the monthly exam is important."