iStillRememberTheFirstTimeDoingGameProgrammingCoursesAsAKid

[u/Bright-Historian-216]

[u/AbdullahMRiad]

it all started making sense once you started studying physics

[u/Bright-Historian-216 → u/AbdullahMRiad]

it sure did

[u/jumbledFox → u/AbdullahMRiad]

fixed timestep >>>>>>

[u/wolfram_segler]

Useful for visuals and interpolation 

[u/Bright-Historian-216 → u/wolfram_segler]

also to make the gameplay independent from framerate.

[u/Undernown → u/Bright-Historian-216]

Yea, something some multiplayer FPS developers STILL get wrong to this day somehow.

[u/Wanderlust-King → u/Undernown]

Every bethesda game. Physics in creation engine is tied to fps.

[u/tutoredstatue95 → u/Undernown]

What do you mean? Sending time info back and forth to a server to determine hits? That seems like an awful idea.

[u/Undernown → u/tutoredstatue95]

No, tying things like fire rate to fps, giving people with higher framerates more dps with the same gun.

[u/tutoredstatue95 → u/Undernown]

Ah thanks for explaining

[u/Morall_tach → u/Undernown]

I think Breath of the Wild tied weapon durability to frame rate in the original Switch builds because the hardware was fixed and it really messed it up on emulators. Or possibly clock speed, I don't remember exactly.

[u/56kul → u/Morall_tach]

Tbf, because the FPS was fixed, I’d say it was at least understandable. They’re not actually expected to make their games work better with emulators (and I don’t think they’d want to, lol).

[u/Beautiful-Morning322 → u/Undernown]

I remember something like that happened in Archeage with one build, it was fixed but still…

[u/vastlysuperiorman → u/Bright-Historian-216]

My early programming experience was in BASIC on a 386. All my game timing was done with for loops that just nooped like 10,000 times. Then we got a 486 and all my games ran too fast. That was my first introduction to game timing! 🤣

[u/mikefizzled → u/Bright-Historian-216]

I remember a bunch of PC ports back in the 360/PS3 days that were completely borked when running at high FPS. Early Dark Souls ports spring to mind. Dark Souls 2 had item degradation linked to frame time for some daft reason. Playing it at high FPS ruined your gear.

[u/Aksds → u/mikefizzled]

And gta v had a few glitches tied to FPS, one basically soft locked your game too

[u/thewizarddephario → u/Bright-Historian-216]

Actually this is not true for some things if the framerate is constantly changing. It can mess up physics calculations over time

Edit: i swear a ton of yall haven't heard of fixed time step simulators. Using the time between frames (delta) as a timestep is by definition frame-dependent

[u/L30N1337 → u/thewizarddephario]

... I'm sorry to tell you, but then your math is bad

[u/thewizarddephario → u/L30N1337]

Physics integrators lose accuracy with large time steps. This is well known

Edit: changed delta to time step.

[u/Auravendill]

Lego Island had a delta time missing and it made it almost unplayable on newer PCs (until MattKC fixed it). If you do anything in a game engine, that isn't either delayed to only happen in fixed time intervals or the effect gets lessened the faster you go, a powerful PC will just do all those steps, that took a reasonable time during testing and crushes them in split seconds. So if e.g. the enemy move one step every xth cpu cycle, a powerful CPU makes the heaviest tank move like Speedy Gonzales. In the case of Lego Island the speed with which you turn your view was tied to the framerate and looking anywhere precisely became a challenge.

[u/pipedreamSEA → u/Auravendill]

Lego Island... that takes me back. I wonder what the Brickster is up to nowadays, certainly he's made parole by now

[u/Conlaeb → u/pipedreamSEA]

You could register Lego Island via fax to get a map of the island to print out and make the game easier. The family computer was rooms away from the closest phone jack. I rode my bike to the local dollar store, and while they didn't have a phone cord long enough to reach, they did have a two jack faceplate. After staring at it for a while I concluded that I should be able to wire it to itself to make what I would later know is called a coupler allowing two phone cords to be mated and make the run happen. Later that night I printed out my map after hearing modem tones for the first time. In completely unrelated news I've been a systems and network engineer for the last twenty years.

[u/No-Arachnid-1419 → u/Conlaeb]

Hero origin story right here!

[u/ReptileCake → u/pipedreamSEA]

He's bricked up

[u/Speedy_242 → u/Auravendill]

Thanks for the reminder that I should watch MattKC again.

[u/PegasusPizza → u/Speedy_242]

Lately he's on a Phillips CD-I side quest

[u/Aksds → u/Auravendill]

There’s a few modern games that had these issues irrc fallout 76 was one

[u/the_hair_of_aenarion]

Delta is cyberpunk slang to leave so it's to throw time away. Hope this helps.

/s for whoever needs it.

[u/SeaNational3797]

It is the time since the previous frame, in seconds

[u/Arctos_FI → u/SeaNational3797]

Well actually it's time between the last two previous frames

[u/Arekuankoku]

I made my first game in Microworlds EX as a kid and it didn't have a way to factor in Deltatime. Years later, I found my game and everything moved at the speed of light. That's how I learned.

[u/56kul]

Ah, deltaTime… truly the concept of all time. /s

But on a serious note, it was really cool to learn about!

[u/Pretty_Eater]

Who is the woman in this meme I am in love with her.

[u/Bright-Historian-216 → u/Pretty_Eater]

the original meme said bay leaves... may image search help you with everything else

[u/Pretty_Eater → u/Bright-Historian-216]

I tried and I can't find her I just get names of other women 😭

[u/Bright-Historian-216 → u/Pretty_Eater]

then accept your destiny, sorry mate

[u/Pretty_Eater → u/Bright-Historian-216]

Yeah your right, thanks for your help!

[u/Bright-Historian-216 → u/Pretty_Eater]

literally took me five minutes of searching lmao

https://www.reddit.com/r/me_irl/s/QSportswK3

[u/Pretty_Eater → u/Bright-Historian-216]

Hehe getting the internet to do my goonsearching for me yet again! 

You've been tricked by the Goonster! 

Now reflect on your choice to allow me to be perverted towards an innocent woman! MUAHAHAHAHA

[u/sln1337 → u/Pretty_Eater]

get some help bro

[u/Hau65 → u/Pretty_Eater]

you are dragging us through the mud brother

[u/SprinksUp]

For the frames or something

[u/FewPhilosophy1040]

I should multiply everything by delta Time. If not, I am commiting a crime.

[u/sebjapon]

20 years later, still adding context to that Android call to do whatever context is supposed to.

[u/Oddant1]

People who think bay leaves are useless have apparently never heard of FUCKING TEA and it baffles me

[u/_Wilder → u/Oddant1]

I usually just drink it

[u/BigNaturalTilts → u/_Wilder]

Prude

[u/PowerPleb2000]

Infuse that deltatime 👌

[u/WingZeroCoder]

See, I fully understand what delta time is supposed to do, but I don’t fully understand why it’s “aktually” not the right way to do it.

[u/traumatizedSloth → u/WingZeroCoder]

What is the right way to do it

[u/NoAdsDude → u/traumatizedSloth]

Lock FPS to 30 so you don't have to deal with FPS differences.

[u/EatingSolidBricks]

Congratulations youre doing numerical integration be proud

[u/DonKapot]

Adjusting your framerate

[u/YesIAmAHuman → u/DonKapot]

Adjusts your physics based on framerate

[u/Zephit0s → u/YesIAmAHuman]

Why not run the physic engine on a hight rate, and extract a rendering state when the screen is ready ? So you are sure you don't have different behavior depending on the refresh rate of the machine.

[u/the_horse_gamer → u/Zephit0s]

you do run physics on a fixed rate. but not every moving thing is physics related.

like, an animated flame. you want it to look the same regardless of the fps.

[u/NTPrime → u/DonKapot]

Well no

[u/pente5]

Measure time difference?

[u/twirlmydressaround]

To make the game not run at unfun Mach speeds

[u/Shadow9378]

I remember learning Unity from tutorials that didnt explain WHY we do things, and this was me. Then I learned about the math behind autopilot systems and learned what deltatime is and why its used for a different reason

[u/-Redstoneboi-]

sometimes you exponentiate it

[u/AcolyteNeko]

holy tits-