Accelerated Back Hopping in Half-Life 2 - Math Explained

[@BobTheMartin]

"Yes I drive a 2004 Gordon Freeman"

[@mnichu201]

5 minutes of math class: 👎 15 minutes of emotionless guy explaining the half life 2 movement: 👍

[@SkylorBeck]

I cannot get enough of people breaking down the code for my favorite games

[@umanoomgombi3842]

Ever without knowing code, if you watch enough you get an understanding of how it all fits together. Basically math yeah.

[@ruzgar1372]

Valve tried to stop speedrunners and in turn accidentally created one of the most fun speedrunning tactics.

[@NoahGooder]

heck they even created a new genre of maps.

[@SioxerNikita]

Valve didn't try to "stop speedrunners", they tried to fix a bug in their code... That's all... If they REALLY wanted to try to "stop speedrunners" they'd have fixed this to, but they didn't. The bhopping forward is something you can relatively easy stumble upon in normal gameplay. Accelerated backhopping is not really that likely.

[@MAD22324]

god tried to stop the freeman and the freeman merely became faster

[@Just5omeRandomGuy]

Now we all need one man to HUNT DOWN THE FREEMAN

[@Space-Shuttle-Scam]

Gordon freeman is so powerful he can break the laws of physics.

[@AwesomeNigga1488]

@@Space-Shuttle-Scam thats what being a theoretical physicist does to you

[@snippetism9802]

@@AwesomeNigga1488 Well thanks to Gordon, it's no longer theoretical in a way

[@Kevin-jb2pv]

​@@snippetism9802 its a theoretical degree in physics

[@1thevm1]

It's weird how they messed up coding the speedlimiter despite having a pretty robust one in HL1. The systems are different, sure, but I guess the intern who coded it that day totally winged it. At least it gave us one of the coolest movement techs in gaming.

[@mfaizsyahmi]

Because the one who added the one for HL2 wasn't named John Carmack/Romero, whichever.

[@LotsOfS]

You know an ABH video is good when the videotist starts the video on the Highway 17 dock

[@karoltsvetkov517]

videotist lmao

[@mooj269]

the car is ready for you now dr. freeman

[@orionbarnes1733]

the last thing speedrunners hear before going supersonic

[@jezuzlizard2242]

Half Life 1 Intended genre: FPS Actual genre: platformer Half Life 2 Intended genre: FPS with a focus on story Actual genre: racing sim

[@abandoned_green]

“What the hell I didn’t ask for working code” “Don’t worry it’s still broken” Half-Life 2

[@ahmetdag5600]

Debugging hl 2 code for understanding how glitches work. Marvelous job. Thx

[@npc_pigeon]

heck yes new video to listen to whilst doing art

[@udontseemeiseeuuseemeiseeu]

never left my alzheimer's ridden grandfather unattended faster

[@alejandropulidorodriguez9723]

I think the world needs you

[@jonskillings1258]

It's ok, you now know the math to get back faster

[@orionbarnes1733]

I've always wondered why walking exists in hl2, but it's nowhere as big of a mystery as why holding E in hl1 makes you move at a snail's pace when walking exists (and is significantly faster)

[@timquestionmark]

great video! It's great to have resources like this explaining the logic behind weird wonderful mechanics

[@Deniil2000]

We give a player a forward speed boost when they jump. But now, we want that speed boost gone. So, do we just remove the speed boost then? No, we surround it by more spaghetti logic

[@wuzzle22]

The car's ready for you now Dr. Freeman!

[@TurliTheCat]

i always wondered how bhopping worked...interesting video! I liked it!

[@SKCro.]

How does one 'walk' in HL2 while wearing a HEV suit? Is it some separate, normally-unused keybinds or something? You mentioned that being HEV-less forced you to walk, but in some of the footage (mainly 2:10), it's implied that the player is in the HEV suit (mainly from the UI), but are still somehow walking. This video also gives me a terrible idea: Beat HL2 while going as slow as possible (while constantly moving - no waiting 8 hours then beating the game lol).

[@v-14415]

Hold ALT to Walk

[@SKCro.]

@@v-14415 Wait, seriously? That's a keybind? How did I not notice that while going through the controls? I guess it's a bit of a weird and obscure one since alt is a bit hard to press with one hand while also pressing a directional key :P

[@v-14415]

@@SKCro. Yeah, it's also kinda hard to jump while Walking

[@chekkibrekkiv1.245]

hay guys its desinc today im gonna show you how to reverse bhop

[@CausticAscarite]

300 km/h!!!

[@SugarCoatedCocoa]

You explain everything so well! Keep it up man!

[@kuromeankokuboshi8568]

As a person coding gmod addons, hearing code related stuff like normalized vectors puts a smile on my face

[@orby5183]

hey pinplash I don't know why but your voice is very comforting and I like your videos, they speak very loudly to my adhd.

[@SomeRandomPiggo]

Like a lot of things in Valve games, the movement isn't realistic but it is very very fun

[@the_last_chancer]

I would like more in-depth code analysis of source or other games pls.

[@chocolates182]

Yes please. An analysis of csgo dangerzone's movement quirks would be amazing. That game also had ABH.

[@gregory-of-tours]

I didn't even know hl2 had a walk speed

[@augustIacey]

super in depth video about my niche interest? yes please!

[@supervitu64]

pinsplash is the shounic of half life

[@ecksdee1149]

This is one of those VERY rare videos i never knew i wanted to see

[@DSALquarantine]

cool video, well explained

[@SourceSpaghetti]

Thank you Mr Pinsplash for teaching me the ways of Half-Life.

[@Sugar3Glider]

When you landed one of the big jumps KZbin shat itself and restarted my playlist. I was very confused

[@kokobedima]

Great material for falling a sleep

[@bloodakoos]

yeah its the backwards long jump from mario 64

[@thatgi3817]

I guess the Certified Valve Polish (TM) isn’t applied very much for patches. This wouldn’t have slipped through the cracks in mid-stage development… right?

[@rafaelhines1178]

Yes, this was added in a patch trying to patch out bunnyhopping

[@MaxTovstyiMusic]

I never knew I needed something like this to know

[@BenLubar]

I want to put something like ABH into Alien Swarm: Reactive Drop, but the player not being able to jump causes some problems with this.

[@Taras195]

Why didn't they just clamp all the speed vector components (separately) after all these calculations, and recombine it back?

[@ethanisnotsleeping]

So, I'm just curious, in terms of MPH, what is Gordon's max possible speed with ABH?

[@NoahGooder]

well if you had an infinately large map to test it you could probably reach somewhere in the range of 2147483647 units per second.

[@NicknineTheEagle]

Player's movement speed in HL2 is hard capped to 3500 HU/s. Which you can reach pretty quickly with ABH.

[@accountname7392]

"The exact definition varies from game to game, but a Hammer unit is usually defined as a sixteenth of a foot (16 Hammer units = 1 foot). This means that 1 Hammer unit is equal to exactly 19.05 millimetres or 0.75 inches (3/4")." The speedcap in HL2 is 3500 HU/s, which translates to 218.75 feet per second, or 149.1477mph

[@nonmrenderman0643]

In layman’s terms Man constantly jump backwards sitting man go fast

[@explodingbearz]

It's a sad day to not be in the channel members list :(

[@Pinsplash]

what do you mean? i got you in there

[@explodingbearz]

​@@Pinsplash I was under the influence when I made this comment PAY ME NO MIND!

[@explodingbearz]

​@@Pinsplash🤍🤎♥️💙💚💛💜🩷🩶🩵🧡 keep being awesome!

[@juanes8931]

​@@explodingbearz lmao

[@shawermus]

According to this vid (hl2 devs reacting to speedrun), it seems that devs left this on purpose. kzbin.info/www/bejne/qXzCgZetgZqMbsksi=7tET1wB4wIgWfZVY

[@dendi7698]

subtitles took 2 times more than previous video about episode one wtf

[@Prucake]

wtf is strafe modifier actually even intended for in the first place

[@mantazzo]

Honestly, I would love if you could implement some of your stuff into HL2 reUpdate mod, would be quite cool tbh.

[@Bunerd]

I did not understand anything but great video nontheless

[@josha618]

pick up that can

[@ragnose1]

why not just set it at max speed if new speed is greater than max speed...

[@inkybz]

i love pinsplash

[@Lambdac0reYT]

Yeeeeaaaaaaahh

[@scottl.1568]

Decinc?😮

[@MrDirt]

Oh Boy, time to listen to some Bismuth piano music and watch some Pinsplash.

[@dk1480]

My fix if (flNewSpeed > flMaxSpeed) { if (mv->m_flForwardMove > 0.0f) { flSpeedAddition -= flNewSpeed - flMaxSpeed; } else if (mv->m_flForwardMove < 0.0f) { flSpeedAddition *= -1.0f; flSpeedAddition += flNewSpeed - flMaxSpeed; } } else if (mv->m_flForwardMove < 0.0f) { flSpeedAddition *= -1.0f; } Fixes this

[@benishench]

🗣🗣🗣🔥🔥🔥

[@TheJohnDough129]

How do u know all this point Dexter?

[@triatomicend]

AARRRRRRGGH *I FUCKING HATE MATH*

[@inkybz]

yes ^^^^^^^^!!!!!!!!!!!!!!!!!!!!!!!!

[@crosskoyamayandaytugay3508]

hmmm

[@keanewardall233]

Hi

[@BoogieBrando]

Hi pin splash i am doing the subbing towards you

[@Mr.SpicyIce]

Sorry. This meth ache in my skull is hurting like hell.

[@scantyer]

Pin math teacher ❤