Explosions

Kaboom.
Music used in order:
Nukaland by Viscra Maelstrom
Dark Groove by Alexander Brandon (from Jazz Jackrabbit 2)
Wondering... by Doomkid and Lippeth
Erecting the Black Tower by MegaSphere
Rusty Bridge by Stuart Rynn
Intro footage from A Visit to id Software (November 1993):
• A Visit to id Software...
.MID the way id did:
• .MID the way id did ♫ ...
MegaSphere's music:
megasphere.bandcamp.com/album...
Classic DOOM's channel:
/ @classicdoom
A1s's channel:
/ @a1s972
Patreon:
/ decino

[@michaeldonoghue9015]

As a software engineer by trade, I could not even imagine someone making videos about my source code 30 years later and going into detail about how I decided to implement some function or round a result. Can you imagine? Speaks for how influential it’s been for the world. Truly an exceedingly rare thing.

[@mathprodigy]

💯agree, hence why Doom was indeed so revolutionary and groundbreaking

[@deadfishy666]

The only reason people can talk about Doom's code is because it's open source. To a lot of programmers this phrase is like kryptonite because they would rather have their stuff closed. So I doubt it'd happen in most cases.

[@gunswinger3110]

@@deadfishy666 shame that not a lot of games have their sourcecode made open source. Hell, nowadays games don't usually come with actual powerful modding tools anymore like map editors and SDKs.

[@ErebuBat]

Yeah Carmack was adamant about being open and supportive, even threatening to quit over it. Can you imagine if something like DWANGO happened today? For those who don’t know: DWANGO was a system in which you could do matchmaking / multiplayer in doom before the internet. IIRC they did this by tricking doom into thinking that DWANGO was a modem so doom didn’t know any better but DWANGO could route your game traffic to the correct place. The company that made the game would freak the hell out and sue the people for hacking and reverse engineering. Whereas “back in the day” the iD guys thought it was the coolest thing ever.

[@Manavine]

@@ErebuBat Actually, we did get something like DWANGO, it was called Slippi. Since it was an old game, they didn't care, at first. But the moment it became the online option for a tourney, they acted basically immeditately to nuke it and accuse it of "encouraging piracy"

[@NML666]

Those zombies exploding in a square was a work of art.

[@eebu4053]

asposion

[@MirekWdowiak]

Squareplosion ! :)

[@inffr88]

Pew pew pew and kaboom >:) Entire doom plot in 5 words

[@bigbruhtheorphan9070]

zombieplosion!

[@thebritiannicscribian991]

500th like

[@rebca_]

Babe, wake up, a new yellow background Decino video just dropped.

[@knucklesfan463]

ahem, decino

[@GProgress]

@@knucklesfan463 ducino*

[@Ben_5917]

Yes, honey.

[@noidTV]

@@Iliek *Ducino.

[@IDHLEB]

@@noidTV dunkaccino

[@the1stwing]

decino: "A cube with infinite hight" Me: *cries in geometry*

[@theonlybilge]

Assume Euclidean geometry

[@The_Big_Jay]

Oh god, I just realized how screwy that is.

[@theonlybilge]

@@The_Big_Jay Same, I just realised that it's actually a rectangular prism

[@VaderTheWhite]

[Laughs in fthgan]

[@DeonGaming]

@@theonlybilge It's called a parallelepiped.

[@KrinkelsNG]

Totally had fun watching this. Quality stuff.

[@abdullahh_04]

Krinkels? What are you doing here? I didn't know you were a doom fan.

[@pitysquid]

No way it’s Krinkels

[@nbanextlegend7497]

OMG IT'S THE MADNESS MAN

[@nbanextlegend7497]

@@abdullahh_04 He's a big fan of boomer shooters,I watched him playing Dusk in a stream once

[@pitysquid]

@@abdullahh_04 that explains a lot actually

[@BeengusKhan]

That Archie on the thumbnail honestly looks like he's chilling over a bonfire

[@iguana9173]

Yes definitely.

[@thatstockimageguy1067]

you mean a *bomb fire*

[@Valhalla_Heathen]

He’s warming up his hands 😁

[@StraightOuttaJarhois]

That's it, a bonfire, that's why the enemies come back to life!

[@tovrobi5097]

The only thing is - the bonfire is the player's corpse.

[@EHZD]

Doom logic: if you don't see the explosion, it doesn't exist

[@marzi_kat]

If a tree falls in the forest and there's no one to be hit, does it deal any damage?

[@xanniest]

@@marzi_kat Depends on the blockmap

[@basedcringechad5640]

I've never seen an explosion. I've also never been blown up. Just saying.

[@CaveyMoth]

Doom Explosion is not visible. Doom Explosion cannot hurt you.

[@TheReaverOfDarkness]

Doom Logic: If you can SEE the BFG hit, then any enemies you can SEE also get hit.

[@alucardpg]

*Calls girlfriend* "Honey? I am going to be 13 minutes and 57 seconds late for our date."

[@iguana9173]

You did the right thing.

[@bappojujubes981]

You could just have her watch the video with you on the date.

[@bigbruhtheorphan9070]

babe, can you come over for 13 minutes and 57 seconds?

[@TheReaverOfDarkness]

Real women watch Decino with their significant other.

[@GB_256]

It’s amazing that John Carmack and id’s team was able to program all of this in just barely a year.

[@discoRyne]

Diet coke is one helluva drug

[@DinnerForkTongue]

@@local538 And chocolate.

[@SpongeBobaFett]

@Quadsword I was just gonna say that. John Carmack is on another level of smartness. We were just fortunate enough that he used his intellect to create an epic computer game, out of all the programming paths he could've followed. Maybe this isn't the darkest timeline after all.

[@Plague_Potato]

@Quadsword You mean Part-time astrophysicist and our only insurance against their overwhelming alien incursion John Carmack?

[@akeustis]

Might explain why there's so much jank and bugs though. From a software engineering perspective this is what's euphemistically known as "legacy code", i.e. code that kinda sorta works most of the time but God forbid you ever need to change something or understand something.

[@Wavy667_]

Fun fact: Explosions in Jaguar console ports can penetrate through walls, making them overpowered against things like monster closets.

[@jacryan2626]

But as Caddy said: "We dont talk about the Jaguar."

[@TheBreakingBenny]

@@jacryan2626 We can talk about its source code, though!

[@Nihilistic-Mystic]

@@jacryan2626 CHAPTER 6: WE DON'T TALK ABOUT THE JAGUAR *requim for jaguar intensifies*

[@NEZLeader]

@@jacryan2626 Jaguar version of DooM is easily the best console Port made by retro consoles (in terms of pure original vanilla ports, DooM PSX is the best version for consoles but is heavily altered, slowdown & gfx are pretty rough).

[@jacryan2626]

@@NEZLeader yeah sometimes the framerate would tank and some sprites would dissappear if there were too many enemies.

[@felynecomrade]

If DOOM were an officially recognised field of academic study, decino would undoubtedly be one of the foremost experts in the world. He'd be the one giving lectures and presentations as a DOOM professor with a DOOM doctorate.

[@dustyrust36]

I'd definitely pay to go to THAT college

[@Minnevan]

Doomology

[@dustyrust36]

@@Minnevan Perfection

[@bta8359]

Phdoom

[@lyrimetacurl0]

Even more than John Romero? 😂

[@Alloveck]

Shocking twist: Doomguy's canonical reason for being the sole person who can stand against the forces of Hell is that he's secretly the only in-game person who understands his world as well as Decino.

[@KirillGorobets]

Every square explosion is a masterful compromise of accuracy for faster calculation. It's ideal for the type of game Doom is - hectic fights, everyone moves around - you won't even notice.

[@CaveyMoth]

My mind is blown that explosions are square.

[@ErebuBat]

Exactly. It is technically “wrong” but in normal gameplay it isn’t even something that is an issue or is just attributed to luck. John Carmack was a master of these types of choices which lead this game being able to run on a 25Mhz processor. Truly amazing

[@Jesse-qy6ur]

@@ErebuBat I think that's a big part of what makes Doom technically interesting: processors were powerful enough to do the graphics compositing and basic AI, but weak enough that things like square root calculations for explosions and using a real PRNG for the shotgun were prohibitively expensive. All games are first and foremost products of the hardware at the time, but Doom sits right before the hockey-stick growth of consumer-grade CPU power really got going with the Pentium and the PowerPC in 1994.

[@makhauser42]

decino: publishes a video called "Explosions" Dienst Speciale Interventies: Oh, don't mind us, move on

[@sirel33]

I spent a solid minute rereading those first three words in the second line I wanna be a speciale interventy too

[@Elmom_]

@@sirel33 It's Dutch. It means "Special Intervention Service".

[@Damian_1989]

What is that, the Dutch FBI?

[@CheesePotato]

@@Damian_1989 yes

[@HexagonalZebra]

@@Elmom_ Is Decino Dutch?

[@matriarch4882]

Literally just died to a rocket at the end of Eviternity Map 09 and ragequit to KZbin to find this

[@hypercynic]

KZbin mocks you sir. Are you going to just lie down and take it!? GET YOUR ASS BACK THERE AND BEAT THE FUCKING LEVEL SOLDIER!

[@markus-hermannkoch1740]

0:54 Once talked to a game developer. He told me his art is in making things as simple as humanly possible while still working. The Doom makers make a good case proving that point.

[@Tsuki_On_Paws]

The Arch-vile in the thumbnail looks like he's approaching something insanely precious yet fragile.

[@lugbzurg8987]

He's trying to pick up that bonfire.

[@Fuchsia_tude]

He's trying to Indian Jones swipe the barrel mid-explosion.

[@Tsuki_On_Paws]

I'm really proud of those replies

[@MopMcBingus]

this whole time i thought mancubi and revenants actually were explosive.

[@MrEvilbyte]

For the longest time I did too. Ditto for Barons and Heck Knights xD

[@iguana9173]

@@MrEvilbyte same here

[@macabweu7682]

I thought Imps had explosive projectiles once but it was cause I was following a projectile for fun. And it hit the wall and another imp who's sounds didn't play had fired a projectile at me that low rolled damage.

[@CallofDutyBlackOps28]

i think their idea was being a giant fireball, and it's "explosion" is the flames dissipating from it's represented area where it stops being a flaming ball.

[@Fuchsia_tude]

I knew revenants' weren't, but I think I thought mancubi's were.

[@williamsmith666]

The PS1 ports of Doom and Final Doom have an interesting quirk with regard to explosions; in certain instances, you can fire a rocket where two solid walls converge into a 90 degree angle and its ensuing blast won't cause any damage to you.

[@lolxd1137]

0:13 "Pew Pew-pew and kaboom" -decino 2021

[@n00f]

I think you've had a single rocket Revenant kill once or twice in your playthroughs. Nice to know why. Also that outtro.

[@n3onkn1ght]

The beautiful thing about _Doom_ is that it relies so heavily on RNG that you're never _quite_ sure if something is a bug or just a bad roll.

[@majamystic256]

Mr. Torgue approves of this video

[@themiataisntahonda334]

E X P L O S I O N S ! !

[@-bemyvalentine-]

Ah, I knew I wasn't the only one who thought of him!

[@themiataisntahonda334]

@@-bemyvalentine- news flash, *you aren't*

[@Leet-iz2fz]

I fell asleep listening to this and had a dream that Death from Discworld was showing me a version of this where you directly compared the damage and blast radius of Doom explosions to real-life bombs. The dream ended when a bomb landed near me, I sprinted away, and then the last thing I heard was "Ah yes, eleven thousand times more blast damage."

[@nilly0052]

Decino standing by in apathy as a someone get's vaporised by eleven thousand times the blast damage XD

[@Leet-iz2fz]

@@nilly0052bro narrated over my gib animation

[@smergthedargon8974]

11:35 "Involving a lot of moth" The code runs by having a bunch of very tiny moths running around manually flipping 1s and 0s.

[@decino]

Well yeah, where do you think the term "bug" originates from?

[@qwertyram4598]

@@decino Funnily enough, it does originate from removing moths from a computer

[@BigFaaayaaa]

You're on the verge of explaining the game to the very Devs mate, impressive :)

[@sanketower]

Decino: We're now going to talk about Blockmaps Coincident: *T R I G G E R E D*

[@user-xq9wm8gj8y]

"I hope you had fun watching it too" decino is only person who can turn doom code researchments into such great little movies, so even a person like me, who is very far away from that is highly entertained. Thank you

[@victoriqueMoe]

EPIC! That block map with the array list was really interesting! always keep your lists immutable when sending it off to other methods, boys :)

[@KirillGorobets]

Or better yet, don't store them in some global variable, making implicit dependencies :)

[@stupidAgeverificatio]

Pretty sure it's a linked list. Otherwise it wouldn't behave like that.

[@KirillGorobets]

@@stupidAgeverificatio It was a linked list, but you could easily mess up with any data structure if you are not careful. The same thing could happen if it was, say, just an array and elements would be suddenly rearranged in the middle of a "for" loop.

[@victoriqueMoe]

@@KirillGorobets concurrent modifications are not a good friend

[@flex9663]

@@amnesicpachyderm turn it into tuple boi

[@ricegod7812]

Decino is the only Content creator that can hurt my brain with math and coding without boring me.

[@williamanstis]

search ranoeke gaming, theres another one

[@luckylooser2013]

"...I'm here to ask you one question, and one question only! EXPLOSIONS?!"

[@coincident]

Great video. I've always wondered why I took no damage while face-rocketing myself again some walls... and now I know! Also loved seeing the analysis of the double-blast-damage rocket bug. I almost considered adding that subject to my blockmap bug video, but ended up cutting it out to not delay the release. Major props for digging into the code for this one decino; it looks like there's some mind-boggling spaghetti in there.

[@knucklesfan463]

Meanwhile, certain mr. Torgue has only one question: EXPLOSIONS?!?!

[@expendableround6186]

*EXPLOSIONS!*

[@Metaretru]

Mr. Torgue is proud of this video

[@mjc0961]

That Slayer screenshot appearing while saying "no" 😂

[@bedrockcastle777]

my dopamine levels shoot up to 250% when I see a new yellow thumbnail

[@justanantico6327]

But then there's the moment when you see a yellow thumbnail, but its not by decino. One of the most tragic betrayals in history

[@bedrockcastle777]

@@justanantico6327 Oof, yeah that sucks

[@joshualancaster2168]

I can tell this video is going to BLOW UP Aaahahahahahahaaaaa...... : I

[@bappojujubes981]

Don't change

[@mathprodigy]

I was in the line of sight. I took full damage.

[@clonefighter1996]

"Kaboom?" "Yes, Archie, kaboom." Main video sections: 0:00 Intro 0:26 How explosions work 2:35 Things that explode 4:17 Rockets 5:26 Explosive barrels 5:37 Arch-vile's attack 7:40 The blockmaps 8:54 Double damage 10:57 LoS code bugs 12:17 Outro

[@DOOMSlayer6476]

Decino always says the most interesting things about DOOM

[@iguana9173]

He sure does.

[@alextcastillo1151]

Not even a pinky in nightmare mode is too fast as me coming to a new decino analysis video

[@odstagent1070]

Our favorite characters doing Jojo pose: 2:40 (?) It's a special feeling that you figure out things in Doom and then show us, like some kind of classroom

[@Soddarkryder]

Ah, yes, my favorite jojo pose: explosive barrel

[@JDHerreraMusic]

Jazz Jackrabbit 2's music is a real touch of class...

[@piip4]

Been playing doom since the mid 90s and never really had a break from it. It blows my mind that I could learn something new about it.

[@A_Lazy_Mutt]

You are becoming the Doom professor, ducino.

[@FelipeJaquez]

Next episode will be about how walls work and the code on how the engine makes the weird 2D - 3D

[@las4gna84]

*BOMBS, you want it? it's your my friend, as long as you have enough rubies*

[@abrahamlincoln9160]

Sorry Slayer, I don't give credit! Come back when you're a little MMMMMM richer

[@OzzyFoxMercury]

Your Doom analysis series gets credit for getting me interested in coding and sending me down this career path. Something so beautifully fascinating about the way it works, and you explain it in a way that intrigues instead of intimidates.

[@521Undertaker]

The blast damage distance calculation uses the Chebyshev metric - en.wikipedia.org/wiki/Chebyshev_distance. It is perfectly reasonable for you to use the phrase “blast radius” because in this metric, circles are squares. Sorry for the edits. I couldn’t remember the name of the metric.

[@loknito5764]

Story line Its 2 and 17 am Decino: Uploads a video aboit doom explosionsp My eyes: tomorow My brain:WATCH THAT AMMO BOX OF 2919392 LINES OF C++ CODE FOOL

[@legoseed2389]

I had fun learning about explosions

[@anthonyflorez1316]

Be

[@42percenthealth]

Me: Explosions in Doom aren't that complicated. I probably already know everything that's going to be said in this video. Decino: Kills a revenant in one rocket Me: shocked Pikachu face

[@BennetCRadey]

You mentioned the Pythagorean Theorem, so you can technically mark the video as educational.

[@BennetCRadey]

@@local538 I mean you're not wrong

[@jackulstrom9150]

That "No" was perfect

[@TheSpacey52]

The perfect surprise while scrolling through my subscribers list!

[@smugbowkid9919]

Cursed Doom moments: That rocket damage on Revenant and Mancubus.

[@competingyevhen]

1:24 - actually, rectangular cuboid (cube with infinite height is infinite in all directions).

[@T-West]

3:26 I suppose Rockets are more appropriate for explosions than are Birds...

[@SamothIorio]

Did you know your rockets can deal more damage if you kill doomguy before the rocket impacts? Wait, wrong game nvm (I love seeing dedicated players of different playerbases mingle! Also, I'm eagerly waiting for the next light-blue thumbnail video!)

[@NelsonSKA]

Hahaha the doomguy-trick. Hi T-west!

[@jimsouch8632]

Is that an AoE II reference?

[@ominousvirus5278]

Remember when I said “I hope some day I’ll understand more of this.” Well I’ve gotten better! I’m now able to program pong in Java, so that’s progress :)

[@vittorioromeo1]

As a hobbyist game dev and long-time Doom fan I absolutely adore watching these videos.

[@slayerd357]

I LOVE how Decino deconstructs EVERY aspect of this game. It's fascinating and impressive.

[@ubermikesocal]

02:51 In case you ever wondered, the Arch Vile is indeed throwing a Hadouken from Hell at you. John Carmack must have been a Street Fighter 2 fan

[@ClassicDOOM]

Info-taining as always. :) And thanks for the shoutout; glad the content was useful. If you're interested in a similar example of the bug at 11:42, at the bottom of the channel's home page is a "Sewers and Betray" playlist, and at the bottom of that list is video showing some close-packed barrels in Betray that explode without damaging others next to them. Anyway, keep up the great work. Cheers!

[@xm214-aminigun9]

Meamwhile is another universe: Implosions

[@karlk5801]

We had Implosion at 0:09

[@tastybekonn]

title: explosions me: lol what's so complicated about that, count distance->deal damage wtf dude has no more good ideas for a movie me after 14 minutes: oh '-'

[@kroktal8896]

1:19 Actually it's a topological ball of infinity norm, or as non-nerds call it, a square. I think the reason it was done that way is to avoid to compute square roots. John Carmack will later find a fast approximation for square roots for Quake

[@darken2185]

Great video as always! I'd love if you talked about the Nightmare difficulty on Co-op on the console version of Doom 1 and 2. It's absolutely insane and it can be considered a difficulty above Nightmare

[@ademkapovskic8106]

Decino: *explains the intricate mathematical system behind explosions * Me: haha rocket go boom

[@squirtkipfan0136]

and now an inclusive analysis on the science of KER BOOOOOM. Amazing content

[@CemessonderIII]

I see yellow, i get happy chemicals

[@doomgod1150]

Explosions are EPIC!!!!

[@underwatergremlin]

"You can increase the blast damage even more, all the way up to 128. How? Just blow yourself up lmao." I love that line.

[@noeldc]

I am a simple man: I see a new decino video, I click; I see a new decino video with a yellow thumbnail, I click furiously until it starts.

[@darkowl9]

I could listen to decino explain obscure Doom mechanics and interesting quirks all day long. Another insightful masterpiece!

[@a1s972]

Sweet! Good to see u looking deeper into that line of sight thing Ive been curious about that for a while

[@Mintor94]

It took me a while to realise that there's Jazz Jackrabbit music in the background

[@greedy9310]

binging your videos has been an absolute pleasure. Keep it up!

[@MrJohnReviews]

This video was brought you by Michael Bay

[@edgeofspace8655]

Easily my favorite doom content on the internet. I can see how much effort you put into these. Keep it up man.

[@overlyadequate9447]

I love your videos. Thank you so much for taking the time to go through this stuff so thoroughly.

[@Bazztoner]

I really love these type of videos. Thank you.

[@pixelcat29]

I feel like a nerd for still playing doom 2 Even in 2021 and to this day

[@NekoKhris]

Who needs sleep, decino upload is always more important

[@Ferdam]

decino, your work is amazing. I love how you dive deep into mechanics and technical stuff to uncover the reasons on why so many things happen in the game. Congrats, very unique videos you make

[@bobosprinkles]

You are truly masterful at both figuring this stuff out and conveying it in a way that is always a joy to watch

[@justarandomdudeontheintern2739]

Dude Decino sounds so excited in the beginning

[@SkullArrol]

When that yellow background is in view, you know i have to see some decino

[@mondragon9282]

These videos are so fun to watch. I love learning about how things work. Bonus because it's DOOM.

[@carljohnson4285]

Dude I really appreciate the work you put in quality stuff. Every time you do one of these deep dive videos I just say wow

[@_saint_gabriel_]

0:58 "you would say this would be done using the pythagorean theorem," **shows TAG 2 ending** "But no" Good stuff

[@ControlledCha0s]

5:10 - 5:15 A painful lesson that virtually every single Doomer on this planet has learned at one point or another, and all too easily forgotten at the least convenient moments, decino, my man...

[@fmsyntheses]

Your analysis videos are all treasures in their own unique ways.

[@hopegallows1392]

Your in-depth Doom videos stimulate the poles of my game brain. Detailed explanation of game elements and satisfying explosions/gore.

[@juanfe8518]

I didn't understand what you were saying but I had fun

[@maltardraco9555]

It's so weird to see a Cyberdemon fire only 1 rocket and not 3.

[@Kylemsguy]

I love these breakdowns. You explain everything very well, and you jump into the code when you need to.

[@emekoo1027]

These videos are super interesting. Always loved your stuff!

[@tastychunks]

Aw yeah, yellow background time.

[@RabiaCelik0307]

This is like my math lesson I can't understand shit in both

[@GeneralKitten]

Always love your uploads. Somehow a perfect balance of humorous and informative

[@-Raylight]

Did someone say... Explosions??? *_A certain Megumin would like to know your locations_* Amazing video as always, I always enjoyed watching your analyze videos!