DDraceNetwork - developer

ddnet-maps

[ddnet-maps:master] 1 new commit

10becc5 M Momentum - ddnet-maps

what's an efficient way of turning long .demo files into mp4 files?

ffmpeg

14:14

@Boci just record with a regular screen recording software like OBS

I really dont wanna record like 2 hours of demos

14:22

Is there a workaround

2h is fine

14:23

where is the problem

14:23

you can record it in 2x times speed

14:23

well depends for what ypu need the recording

I mean i am still unable to do anything with my computer for 1h in that case

use your secondary computer then

14:24

or pay me 2bucks ill do it

zZz

one more Q can i record demos where i can spec all of the tees?

if you do /showall

14:35

(while playing)

oh ok yea

14:36

how can i set that it's showall all the time ?

14:37

like every time i join a game it will be set to showall

u cant

why?

idk

14:37

xd

jao, help, can i? (edited)

because it requires a lot server resources

14:45

you can bind it on some key that you always press anyways

i thought about it, but for example if i bind it on mouse 1, it's gonna say "now you are able to see every player at all times regardless of distance" every single time i press mouse1 ?

just once

bind mouse1 "say /showall" ?

it will toggle everytime i think

bind mouse1 +fire; say /showall 1

14:47

xd

you need the 1

14:47

works for me

ohh i didnt know it accepted a number

nice!

@jao is there like a line graph showing players rank and points over time? i think that would be cool

18:54

kinda like how osu shows it

there isnt but the data is there

18:54

like this

it can only go up for ddnet but yea

well i think ranking could go down if the player takes a break but yeah that would be cool

for solo ranks it would work

18:57

for teamranks no

oh i meant like point ranking not time ranking

18:59

you should put the discord bot $profile image thingies on the website

rank points or normal points

normal

how would those go down?

if a player is inactive for a while like more players could pass them

18:59

i mean like rank in the world

oh

will the website ever be redesigned

no

19:01

why do u want $profile images on the website

idk i feel the website looks kinda old n outdated

19:02

same with the client

maybe

19:03

but who would do it

idk

19:03

someone pro

i'll make like a layout thing to show what im thinking

That’s like teerace

@ChillerDragon link?

http://race.teesites.net

19:38

I think it’s little bit inactive

19:38

But it used to show your points in a time graph

19:38

So you basically saw player activity there was interesting

oh cool

official infclass website has some similar ideas to it, will send the link here once i'll find it :p

20:28

ah here

20:28

https://stats.resamvi.io/#/about

20:29

on the stats menu it's actually designed for racing imo (edited)

@louis there have been attempts in the past to re-do the site, but our unconventional way of generating the pages really discourages most from ever completing the work

@Learath2 what u mean generating the pages

21:30

also is there like a teeworlds api or smth

No teeworlds api (although I had plans for one (although most my plans are left incomplete))

21:32

We generate the pages using python scripts

21:32

Every couple of minutes

what the

It's all black magic

I mean the idea of serving static pages isn't too bad

its not

Which one?

but imo an api is better

21:33

i would love to do it in golang

we should have like

21:34

a stat checker in game (edited)

@heinrich5991 is the gen script public?

you can right click someones name in tablist and see stuff

@heinrich5991 yes, but very modern web dev unfriendly

21:34

@Ryozuki ddnet/ddnet-scripts

i guess its this https://github.com/ddnet/ddnet-scripts/blob/master/servers/scripts/stats.py

ddnet/ddnet-scripts

The magic scripts that make DDNet run. Contribute to ddnet/ddnet-scripts development by creating an account on GitHub.

21:37

@Learath2 how many cores has the web server?

a single one i'd wager

2 cores, 2 threads

there is a neat thing to bypass python GIL https://docs.python.org/3/library/multiprocessing.html

21:37

maybe we can optimize it

eh, it's fine it works, not like we need much cpu to serve up the site anyway

teeworlds should have like

22:02

camera follow

22:02

not like centered on tee

22:02

wait nvm that wont work

then learn c++ and code it

yeah it's not that easy ryozuki

22:02

"just learn c++" greenthing

it is

22:03

i did that

std::cout << "Hello World!" << std::endl;

22:03

Congratulations, you are a programmer

why u gotta put std:: before everything

they are part of the std namespace

I'm not sure what a good first programming language is

22:20

perhaps python

Best first programming language is C

the concept of UB is pretty hard to grasp IMO

Books help you navigate the waters safely until you get to a certain point, where you can start to understand it

22:22

If you REALLY want to avoid C, you need a very good regiment to follow to actually learn some computer science along with your high level language of choice

yes c is the best

what's UB

undefined behavior

22:27

behavior you must not have in your program, else it is allowed to format your harddrive and eat your laundry

or kidnap your kids, it's undefined after all

or do exactly what u intended it to do sometimes

22:28

to make it even harder to track down

Which is why it's dangerous I guess

wait what

22:28

if you don't want undefined behavior can't you just not write it in your code

yea, unfortunately, it's not that easy to avoid

Some things you write might not be defined

e.g. referencing a pointed-to value after it's been freed is undefined behavior

example of undefined behavior: array[i] = i++;

22:29

does it access array[i] first

22:29

or increment i first

or does it eat your laundry, if it's indeed UB

Turns out, which happens is undefined :P

the answer: its undefined

Or dereferencing a null pointer. Compilers are completely free to assume any pointer you try to dereference is not null

derefernce null ptr == crash

22:30

more like dereferencing an invalid pointer

22:30

out of bounds/already been freed

22:30

might crash

dereferencing a null ptr might not lead to a crash

rly? lol

oh

22:31

so basically u just have to be very specific

in what situation would that not crash

if the compiler somehow managed to optimize out the access (e.g. copied the value from somewhere else before), the offset is large enough to point into mapped memory again (the latter often being used for exploiting security vulnerabilities)

oooo

22:32

i see

22:33

i didnt think of compiler optimizations affecting this

http://blog.llvm.org/2011/05/what-every-c-programmer-should-know_14.html

What Every C Programmer Should Know About Undefined Behavior #2/3

In Part 1 of our series, we discussed what undefined behavior is, and how it allows C and C++ compilers to produce higher performance appli...

22:34

"Debugging Optimized Code May Not Make Any Sense"

22:35

that gives an example of where a null ptr doesn't crash

22:35

even a null function ptr

btw, I think an implementation is free to let you dereference a null pointer and have it refer to something

what the

22:35

this stuff is complicated idk

22:35

like

if u dont have compiler optimization turned on this will not affect anything right?

i know how to code basic stuff

22:36

but idk how or where to learn about all this undefined blah blah null pointer etc

google it

wow thanks

The truth is, these things happen occasionally, not always

if you know how to code basic stuff, you're basically good to go, I think

So most of the time you are clear of all the intricacies of a language

and lol that is intersesting article

(also has part 1 and part 3)

22:37

@louis just be careful around code interacting with the network. if you put vulnerabilities in there, people from the internet can take over your computer

The best way to learn C is a book, the best book yet is imho K.N. King's C Programming: A modern approach

really

22:38

i thought it was online

22:38

idk

@noby that is a fun read indeed, especially that null pointer optimizations interaction with dead code elimination

if u turn off optimizations does this bypass all of the things this article describes

22:39

-O0

optimization is -O0 by default

I don't remember the entire article, it is possible there is an example there that doesnt relate to ub

in practice yes, I think

relate to optimization*

but remember that you can still do stuff like

the offset is large enough to point into mapped memory again (the latter often being used for exploiting security vulnerabilities)

I don't remember whether it's UB to access memory through a freed pointer

yes, UB

22:42

double free: UB

22:42

free of non-malloced variable: UB

Writing good C code is hard, but I still maintain that it's the best way to actually learn programming

22:44

Yes you might want something like Scala if you are coding the backend for a bank, or ADA/SPARK if you are sending a rocket to the moon :)

or certain other new languages when you're writing network-facing code

I'm not sure what I'd go for in network facing code nowadays. Probably something like js where sandboxing is high and integration with front-end is easy. Given performance isn't critical

22:47

(definitely typescript, not vanill js, ew)

22:47

I guess I'd still go for C for high performance applications

22:48

rust is probably safer, but I kinda gave up on ever learning it, it just looks like moon runes to me

people have had success with rust too

I'm learning hiragana faster then I'm learning rust

れあらすつー

thst

22:51

that broke my terminal

do you even unicode?

22:52

http://unicodesnowmanforyou.com/

It's the font rendering of this opengl terminal

22:53

because on macOS, the terminals that use corefont render so slowly it hurts

Oh, I guess that's わたしのなまえ (edited)

22:56

Okay stupid phone keyboard decided it'd be helpful and contract my hiragana into kanji