I wrote a Raytracer for DOS, 16 VGA colors

[@beardo6229]

You could pause the actual visual at anytime and create a 90's Math book cover out of what ever is on the screen.

[@shaiqueali4299]

Holy shietucnhskjwkpx , you is right!

[@WASDxMerceless]

So much nostalgia, damn

[@MaghoxFr]

Lmao

[@donutello_]

Holy shit

[@jeremyng1021]

funniest comment here!!!!

[@Oblicze]

The only video on KZbin that looks more realistic in 144p than in 4k.

[@turbone6028]

True, WTF?! 😯

[@someusername1872]

Well I'll be damned, it does

[@SlashZAKU]

cuz 144p is lower resolution than what the tracer is rendering in.

[@RichardCraig]

I was gonna say the same thing! I especially love how you can still see weird color banding, but all of the dithering is gone.

[@dafffodil]

wow amazing!

[@DanBulant]

Modern games: you need RTX for raytracing This guy: hold my IDE

[@dave2.077]

wait a second guys. im a pro. i can do this. well technically more like 10 hours but just wait a bit ok

[@DanBulant]

@ 👏

[@hayoun3]

@@dave2.077 Look at his header. Math, Stdlib, Stdio, dos. only these four. Seriously Can you?

[@dave2.077]

@@hayoun3 i cant understand what you are trying to say me but id like to say that my comment was a joke and is not to be taken serioisly

[@technostalgic4979]

RTX stands for real time ray tracing. RTX is the acronym because RTRT looks dumb. Non real time raytracing has been done for decades

[@mefuri_k]

I think youtube's algorithm is almost fixed as finally they are able to recommend actually good videos they have been postponing it for years.

[@MaxArceus]

I've been getting good recommendations for years. Nearly always at least a few of the recommendations are actually videos I like.

[@lotusauer4785]

But now how long will even years of backlogged good videos last?? A few days? A few hours?

[@Jaqen-HGhar]

no it's just that a bunch of people search ray tracing then they find this video. KZbin sees an uptick in interest in this video from a long time ago so thinks it's worth watching. It does this all the time on old videos and you always see people in the comments freaking out wondering why KZbin is suddenly recommending this video to them.

[@pawala7]

@@lotusauer4785 This video was apparently 8 years backlogged, so we have a bit to go through.

[@aixle3590]

They were just shitposting using the recommendations.

[@firdausmohd2179]

Lately youtube has been recommending me (at least) weird and interesting videos. And this is one of the best KZbin has ever recommended to me

[@Novasky2007]

They seem to have been working on a zeitgeist algorithm. Things we are secretly talking about keep getting recommended.

[@AaronBowley]

funny I watched and liked this years ago yet it recommended it to me again. i approve

[@karmatraining]

Bruh same

[@cobertos_6455]

Makes me miss the algorithm from 7+ years ago and how great it was at recommending quality videos. Lately it won't even suggest me the second part of multi part videos

[@lego_minifig]

Firdaus Mohd same here. Been getting all sorts of wacky recommended shit. Been loving every moment of it

[@thejesuschrist]

Amazing!

[@heattap8991]

Jesus christ

[@Wombattlr]

Hey

[@jayasribhattacharya2048]

I did not know that Jesus was a programmer too xD !! Bless me lord so that I can become a programmer like you too...

[@troys1426]

Jesus himself is calling this “Amazing”

[@xeome5596]

oh jesus

[@tamuwu]

KZbin: Do you want to recommend it? Bisqwit: Nah just wait 8 years. Edit: Damn guys thanks for 10k likes! Really appreciate that ten thousand of you appreciated my comment! ^_^

[@Bisqwit]

It’s not up to me. KZbin does what KZbin does. I call the phenomenon “Recommendation Fairy”. Most of the time she slumbers, but sometimes my channel is blessed by her. Usually she directs the masses to my typing video. This is the first time ever that she directs them to a video that actually represents my channel well.

[@cc12yt]

Too many Ray Tracing Minecraft videos.

[@tamuwu]

@@Bisqwit Yeah she blessed my second channel. WHY NOT MY MAIN AAAAAAAA

[@tamuwu]

@@cc12yt yeah i've seen them

[@SkyyySi]

I guess it's because of nVidia's RTX graphics cards, KZbin may have noticed that videos with "raytracing" in the title are currently 'hyped', so it starts recommending them.

[@Misiecon]

I thought it was added after the RTX boom, then I checked the upload date

[@Cptn.Viridian]

No, KZbin just only cared about this AFTER the boom, thus the super late recommendation of this video.

[@Yufflez]

Lol I actually watched the whole thing and when he typed in his information at the top saying made in 2011, I paused the video and checked the upload date. Then I was seriously blown away as an engineer.

[@pushpopLoC909]

It's only come to the mainstream attention and the masses as of recent because of that. Ray-tracing, given you were in the whole rendering 3-D images thing like myself, has been around for years and years before "RTX".

[@org4ngrinder]

same

[@Misiecon]

@@pushpopLoC909 ikr, computer graphics is one of my favorite things in IT and Ray Tracing is old af but it was nearly impossible to do live RT

[@Cyranek]

thank you for recommending me this youtube

[@TheMuslimMan1337]

Thank you Cyranek, very cool!

[@user-ro1cc8tz6d]

Cool

[@GotTimeGaming]

Good thing that also other people are getting these videos on their recommended tab. KZbin is getting a Lil' bit better like 1% more better

[@thenasiudk1337]

Lol Cyranek, looks like we same

[@fraunaaaa]

your everywhere

[@Standbackforscience]

Woah, someone finally fixed the KZbin algorithm.

[@semiconductorwave7859]

Haha yeah I thought the same thing... it's amazing! I hope it stays that way...

[@funtorm]

Fuck you

[@TwoMinutePapers]

Very soothing. A great experience after a long day of work. :) The VGA colors also bring me back. Love it!

[@33ro0]

Woah. What are the chances I find you here!! I didn't even know your channel existed 2 years ago :D

[@johnclark926]

And what are the chances I’d find you here 6 years before I knew your channel existed! What a time to be alive!

[@thNumber]

wow my fav youtube channel commented on this?

[@ratdn]

What a time to be alive!

[@jimjam4real]

Hebrew in the beginning Japanese 4 seconds in English used as primary language throughout the video

[@muhtesemsiyanur]

*mr. worldwide*

[@wilfreddevries294]

Keep in mind this dude is Finnish.

[@wenelol]

@@wilfreddevries294 Torille

[@Undarial]

Raytracer..in dos..in vga...in 4k...Now I seen it all.

[@jaguar3217]

in 2011

[@DumDoDoor]

It's 640x480 but upscaled to 4K. It's not actually 4K.

[@ruadeil_zabelin]

@TheThunderGuy S You can easily do that with a mod though

[@anatolesokol]

4K in 2011?

[@tissue869]

Whats so weird about 4k in 2011? It wasnt mainstream but it doesnt mean it wasnt any popular.

[@schmutz06]

144p for optimal quality. Prepare to be stunned. Really.

[@eldragon00]

Most underrated comment here.

[@kilianbalter]

Wait WHY?

[@eldragon00]

@@kilianbalter because no one would consider turning a video down to the lowest settings possible would make it look better.

[@dylanbryers6540]

​@@kilianbalter I think it's due to dithering. Dithering is an age-old graphics technique developed in the era where colour palettes were extremely limited. Basically it uses alternating pixel colours in order to simulate the existence of more colours than there actually are. For example, if you space out alternating black and white pixels and view them from a far enough distance they turn into grey. I think what's happening is that the 4K original loses so much detail as it downscales, that a lot of the dither is lost. You can see this when you change down resolutions. There's not a lot of difference between 4K and 720p, but you can see some of the colours getting blurred together or changed by the encoder. Once you drop under the resolution of the ray-trace renderer (480p), the colours start looking more and more solid thanks to the dithering being blurred.

[@WTFJOYA]

schmutz06 144 made it super blurry and 1080 made it really clear? Did I miss something?

[@pawelkorzeniewski4897]

if(rays) { trace; else: don't; } There, optimised it a bit for you.

[@Fragninja]

Hahahaha!

[@Philippe-ch6uk]

I was playing papers please like 10 minutes ago

[@borekworek69]

No nieźle

[@wresni00]

Nooooo, wild syntax error appear

[@turn1p]

Wresni Ronggowerdhi Oh noes, a wild syntax error appeared FTFY

[@Poolie]

and when it and this is this nd [[[[

[@BrainChili]

Didn't expect to find you here

[@Poolie]

@@BrainChili Am I being stalked?

[@OscarNebeAbad]

you both, as always...

[@Poolie]

@@xeome5596 you're gonna get wooshed

[@BrainChili]

@@Poolie its me, the one that died al- 11596

[@pulsekinesis]

8 years old and yet it's still interesting and informative. Despite my knowledge in programming, I really wish I knew how to do raytracing (especially in something like MS-DOS). Regardless, this is an amazing video! Thanks KZbin for recommending me this video!

[@allways28]

The Algorithm Gods have blessed you this day

[@nilaksh007]

I actually reached here myself

[@sumloser8650]

peack programming

[@smuglife64gaming21]

Yes

[@meowgoesthedog_]

Ironically, a video about DOS is available in 4K.

[@BigOlSmellyFlashlight]

hey, we need to capture the pixels extremely sharply so we wont lose the pointy sharp pixellated pixels.

[@ancientapparition1638]

don't forget about the FLAC audio

[@AlyphRat]

Uh? I didn't knew that 4K existed in 2011!

[@BigOlSmellyFlashlight]

wait i already watched this? huh. anyways idk how this video is in 4k if support wasnt added until 2014/5 and usually it would downgrade the quality if uploaded >1080p

[@kikiwora]

640x480

[@Napert]

KZbin - let's recommend this 2011 video in 2019 to everyone KZbin - it has 4k even tho it wasn't introduced to youtube since few years after posting the video

[@DannyPJezz]

Yeah the same happened with 60fps. They keep the files so they can reprocess them into newer available technologies ME LIKEY

[@TRRDroid]

There are also 720p videos from 2006 and I even saw a 1080p from around 2007 if I remember.

[@Napert]

@@ControversialOpinion gigabytes? pfft they have PETABYTES if not even more here you can download a copy of your data : takeout.google.com/settings/takeout

[@FrietjeOorlog]

gigabytes... per person ;)

[@aserra2026]

raytracing probably wasn't a very popular keyword then.

[@michaelvigato3228]

Dude this is sick. Your coding skills are off the charts

[@R4MP4G3RXD]

NVIDIA HATES THIS GUY!! Here's how he made ray-tracing from scratch in 20 minutes.

[@Jazoopi]

underrated

[@alberto7374]

has science gone to far?

[@DeamonD]

@@alberto7374 Check out these 12 reasons why it has. You will NOT BELIEVE #11

[@contrnsmagnificndjoobngtaint]

R4MP4G3RXD he didnt create the concept

[@bagdadaladin8672]

What he can do if will work 8 hours- universe?

[@ryanekapanjisuhartanto7167]

Estimated render time: 73451 hours 53 minutes 17 seconds

[@swifty1969]

more than 8 years worth of rendering...LOL!!!

[@ryanekapanjisuhartanto7167]

​@Rowdy Rhino​More like when you add 10 subdivision surface

[@sweetberries4611]

@@ryanekapanjisuhartanto7167 Me when I add 1 more sample

[@recklesflam1ngo968]

@@ryanekapanjisuhartanto7167 Dont remind me, at the start of my game art and design course (2015) we had to use blender on old althon 64 machines and I would accidentally subdiv x 10 instead of 1-2 ALL the time, crashing the system

[@emiel2712]

@@recklesflam1ngo968 they actually made it foolproof now, you can't go past 6 with a single modifier. guess you weren't the only one accidentally going too far

[@xw33b36]

NVIDIA 2018 - GROUND BREAKING NEW TECHNOLOGIES! bisqwit 2011 - IMPRESSIVE NVIDIA, MOST IMPRESSIVE.. HOWEVER

[@adityachitrigemath762]

Which IDE is he using? A reply would be appreciated.

[@johannbauer2863]

Aditya Chitrigemath He uses his own afaik, it's mentioned in another video

[@anthonyrusso2520]

@Ken Matharoo Ray Tracing is very old tech.

[@howardlam6181]

It was mostly an effort to include hardware to speed up raytracing. Hardware is much harder to develop than software. It also takes up a chunk of silicon area without any speed up to other tasks. So increased cost for nothing for most users.

[@xuangli3952]

Rtx cards provide real time ray tracing, this is prerendered ray tracing.

[@denismilic1878]

I wrote similar crap on my amiga 1200, rendering took weeks in resolution 320x200, I bought half dozen amigas 600 and put them to the closet for rendering. Thous was a days.

[@Bisqwit]

So much time wasted! Those were the days indeed.

[@denismilic1878]

@@Bisqwit I had a grandma and she always complained about electrical bills and power consumption. She patrolled around house switching of any "unnecessary" appliances. That was the only reason why I kept my amigas locked in the closet. Now when I think back that was a tremendous fire hazard.

[@anthonylosego]

When I had my A500, I made a D&D DM helper and a 3D (red/blue) object viewer. Only wireframe though, but realtime rotation. I used POVRay and later Lightwave3D for my raytracing.

[@denismilic1878]

@@anthonylosego If I remember correctly, I used software Sculpt 3d, I was astonished by its capabilities. When I moved from Amiga workbench to pc dos I felt like someone cut my hands.

[@jhonatancosmo]

and Portuguese Amiga means "Girl Friend" LOL

[@DJBillyQ]

Be sure to turn on Closed Captioning for extra info!

[@Matt_328]

people saying it looks better in 144p... bruh, let me enjoy the ordered dithering in peace.

[@jaguar3217]

The codec does it.

[@angiegonzales3606]

It doesn't look better

[@SteveBricksxD]

Finally 144p is actually better than HD for once

[@wormsex]

A man of culture

[@aldobernaltvbernal8745]

no i wont, now switch to 144p

[@manolete340]

That super Mario running at the top is a legend already.

[@FOUNDERZERO]

Tales of Phantasia music for the bulk of the video... you are awesome. Your videos inspire me to pursue programming.

[@popothebright]

Am I the only one who watched this and got depressed about my coding ability?

[@somethingoriginal1707]

Ikr, I wouldn’t even know where to start for something like this.

[@ginanjardelli457]

Me too, my problem solving is not good

[@Igniz]

This is gonna be my inspiration to keep learning and practicing, so one day, I will become so skilled and I'll be able to make some equally amazing like this.

[@Ishirosama]

@@Igniz I think he just rewrote a code he actually already wrote before. Maybe he's just copying his own code. But he surely isn't writing it from scratch. Hope you feel better 👍

[@sufurt782]

@@somethingoriginal1707 3rd semester physics.

[@adobo8586]

This is really impressive. I've been slowly watching your video library, and I have to say that you are one of the most earnest software engineers I've seen.

[@Bisqwit]

Thank you for your kind words!

[@panzerkampfwagen-drei]

2011: No 2012: No 2013: No 2014: No 2015: No 2016: No 2017: No 2018: No 2019: Sure, why not?

[@shadowblastxtreme9032]

Very original very original indeed.

[@herauthon]

i made once a carpet maker ( graph ) in gwbasic.. on the 386 it took a while - later on it was to fast to follow.. like on a Pentium 1

[@o.sunsfamily]

The algorithm is getting better.

[@deniss4764]

Yep. Same.

[@iceseic]

It's because you joined youtube in 2016 duh.

[@LittleWhole]

Nobody: The KZbin Algorithm: let’s put this proto-RTX video from 2011 of a guy programming a raytracer for DOS for 15 minutes in everyone’s recommended

[@lanalvesisthebestot]

🤣😂😂

[@sweetberries4611]

raytracing isn't a new thing and was used since dawn of computers

[@Phuni.]

@Dat Boii ye but that was never mentioned

[@erinfudge631]

I feel like I've just witnessed the 4th Dimension. Very interesting stuff!

[@legoluvver]

KZbinrs: The algorithm is killing content creators! My Recommended:

[@semiconductorwave7859]

after reading the top comments: well maybe showing cool things to the general public wasn't a good idea.

[@TheShmrsh]

It just let them become macdonalds workers

[@trthomaswroberts]

I don’t comprehend exactly what’s going on here but this straight 🔥🔥🔥 aesthetically

[@Tsunami1972]

Ah, this reminds me of the old demo scene. You used to see some amazing coders do things with the old primitive hardware that would blow your mind. I used to watch these for hours on old 8-bit and 16-bit computers (C=64, Amiga, DOS boxes).

[@senatoraz]

Unbelievable - oh my god. That is amazing!

[@jj691]

So happy to find this channel, literally just turned my computer off 5 minutes. You have given me motivation to get back on and put more work in. This is brilliant

[@Bisqwit]

Testing. A few days ago KZbin seems to have sabotaged retroactively all old comments, removing all newlines. Instead of a nice paragraph break between thoughts, there's now _nothing_; the next word starts immediately after a full stop without even a space. It is very annoying. And makes comments a lot more difficult to read. This comment is here to test whether that applies to new comments as well. EDIT: Apparently it does. Because of the "Comment failed to post" problem, I posted earlier on my Twitter page saying: KZbin-Google+ Frankenstein monster, get your shit together. And their response seems to have been: Lol no, we're just going to make things even shittier.

[@spidermcgavenport]

Thank you so very much.

[@hecko-yes]

It seems to have fixed itself everywhere except the mobile website, where newlines are replaced with spaces in all comments.

[@Bisqwit]

At least there are spaces... But that is still awkward.

[@hecko-yes]

+Bisqwit Then again, it's only the mobile website, and who uses that?

[@LucasLuchi]

Nice Graphics

[@nochan99]

WOW man you captured EXACTLY how it felt to program as a young worry-free man in 1992!! *proud of OP*

[@NekoArc]

This popped up while I was looking up stuff on SNES Doom source code. Very unrelated, but I'm here for it! Great video

[@justincase1898]

May take 8 years to cross my screen but im glad it did.... impressive work

[@mr_beezlebub3985]

I bet Terry Davis could have made a raytracer for TempleOS

[@MilanVVVVV]

Bless his soul

[@dumbcatposter]

No one’s stopping you from porting this code to HolyC

[@obiwac]

Did he not?

[@Cole-ek7fh]

friendly reminder terry was killed by gitd.

[@NewtGQ]

In 640 X 480. The way god intended

[@shaunmatthews6656]

At the end This. Is. So. Beautiful. Mixed with the midi soundtrack. I really feel something special. Such a great mix of old and new technology.

[@averagecodegame]

If the current and new programming languages stop working somehow, this guy is going to be the one to rebuild everything from scratch. Great work! 👍

[@SvenNero]

Got this video in recommended and I don't regret this.

[@MeanHacker]

I don't know which one is cooler, the end result or the journey it took to get there. Subscribed

[@Nellak2011]

Who knew that there was speed running for programming.

[@pokiller01]

you mean hackathon?

[@sweetberries4611]

@@pokiller01 It's actually tool assisted

[@bedhead-tb4qg]

love how i finally understand to read code.. i feel superhuman

[@selami32]

BGM Music: Tales of Phantasia - Second Act

[@xc_gwpl]

Thank you

[@fogsaturate]

do you know the BGM that starts at 11:49?

[@kiwipease]

@@fogsaturate StarOcean(SNES) ancient ruin

[@daPvta]

@@kiwipease and @selami32 you're my heroes

[@thierrykurt3867]

Thanks !!!

[@Bisqwit]

The compiler was Borland C++ 4.52. The IDE was an editor I created myself. The OS was DOSBox version 0.74.

[@hobbified]

and OpenMP? Is that for real?

[@Bisqwit]

@@hobbified The OpenMP directives are ignored by compilers that don’t support them.

[@TheGreatJuju]

This is some pretty fucking rad stuff for !!!! I deeply admire you.

[@SphyramidGames]

The more I think about this video, the more things I'm impressed with. The code, the release date, the result. Insane! Amazing job!

[@DixChild]

This channel needs more subs!

[@the_real_Kurt_Yarish]

*goes back in time to 1991 to chuck 16 3.5mm floppy disks with this on it at some programer's head*

[@why_i_game]

That is some incredible dithering, really beautiful. Smoother than most.

[@anisometropie]

This channel makes me happy to be experiencing life

[@sweetberries4611]

This thing people here call artifacts is actually called dithering, it is used to create illusion of more colors, with less colors

[@dr.palsonp.h.d815]

could you expalain more?

[@skyemegakitty]

@@dr.palsonp.h.d815 literally google it.

[@sweetberries4611]

@@dr.palsonp.h.d815 He have only 16 colors, to make more colors his program arranges pixels that way so it creates illusion of more colors.

[@3of12]

wait... has it been so long since dithering was a normal way to generate additional colors that nobody knows what it is anymore?

[@igorthelight]

@@3of12 Yeah... That's scary :-) "What's a floppy drive?"

[@jaytb2005]

This... This is amazing!!! And also very, very trippy.

[@Jonathanloov]

*Seeing 4k resolution* YES *Using it* When will it stop loading?!?!

[@JFrap]

Jonathan L Unless you have 50mps internet ( ͡° ͜ʖ ͡°)

[@markpenrice6253]

Funny, I was thinking near the end "wow, if I could take this back in time to the 386 SX16 and 486 SX25 PCs at school, everyone would freak the hell out" (they all ran standard VGA at the time) ...but then I realised "there's no way this animation would compress enough to fit on their hard drives using any scheme that would depack quickly enough..." and then "ah! there were at least a few with external CDROM drives..." Only to be further foiled by the final realisation that they were single speed drives, reading at 150kb/sec. And a high-rez VGA screen consumes... 150kb. Prebuffering isn't really an option, even via the HDD, as they all had 4mb RAM, no disc larger than about 170mb, and DMA disc transfer (instead of CPU-murdering PIO), even for the SCSI CD drives, was still a couple years in the future... So yeah, it would have been a very nice 1fps slideshow :D

[@andrewschort724]

@konakonaa ok. Turn it down to 144p. It looks better that way anyway....

[@namesurname4666]

This was made in 2011 in 1440p and in 2019 we can't still see this in 1440p (the software is also from 80s)

[@andrewschort724]

@@namesurname4666 Not 1440p, 144p! It actually does look better. See above comments.

[@user-wh9iw1wm9z]

This person taught NVIDIA how to walk

[@derpsquad3306]

This popped up in my recommendation feed not too long ago. How did I not find this video back when it was released?! This is stunning, gorgeous, and just... wow. You did a very very fine job!

[@Bisqwit]

Back then I had like 188 subscribers. KZbin does not promote channels that small unless their videos are already turning out very popular.

[@derpsquad3306]

@@Bisqwit Ah. Either way, I was still shown something amazing, I just can't stop watching it now. It's a truly amazing piece of work you have done.

[@seifergunblade9857]

wow.. never heard about this video.. suddenly youtube suggest this in 2019

[@mikumiku4u942]

Yup

[@paluseata9801]

Japanese and Hebrew all in the same video? Cool. I'm actually studying both.

[@feyisthey]

I speak hebrew natively and studying japanese

[@ZigCade]

@@feyisthey i was born in israel so i knew hebrew since i was young

[@feyisthey]

@@ZigCade cool where are you now

[@ZigCade]

@@feyisthey Still it israel

[@Rittikgarg]

I love these videos because they are timeless. If I don't watch the uploaded date I'd just believe that it's a new video.

[@abreu20011]

You are the man.... Amazing!

[@CapemanProducti0ns]

this dude figured out how to turn RTX on in the 80's

[@disres1337]

This is not real time raytracing.

[@SeraphimSimu]

My new go to video to see if my headphones are working properly

[@sbcode]

you are a genius

[@Carlos_DobleC]

Tales of Phantasia, such a beautiful masterpiece

[@kahnfatman]

YOU ARE A GENIUS of your own kind!! Love it!

[@MisterConagher]

Well, I THOUGHT I was okay at writing in C. Guess I know nothing, now.

[@maxguichard4337]

This was C++, but yeah.

[@1gamesforyou]

Funny that decreasing the quality to 144p makes the video look better in quality. Alright then.

[@yamirgonzalez7501]

Holy shit you are right 😂

[@kurostyx9124]

well its called antialiasing

[@scrubby2]

That is anti aliasing tech.

[@alexa.davronov1537]

@@kurostyx9124 It's called blurring.

[@kevinorr54]

Do you think I know what a JPEG is?

[@noname-sk6zk]

I know it, this is what's gonna make DOS popular again. Also, wow, that raytracer looks _amazing!_

[@sonofhendrix]

But you're mortal, HOWWWWWW???????

[@MrMegajack55555]

Heck, even the music sounds like it's from the 90s.

[@jeenitprajapati3449]

Amazing you made video in 4K quality, and I liked it

[@imkow]

those 3d graphics are amazing.. i wish i know the mathematics behind the drawing......you even have reflection of lights. when i was using borland c++, all i could draw is circles, boxes, or .bmp pictures at best.

[@Bisqwit]

+imkow It is mathematics heavy, yes. For each pixel in the image, a vector is calculated representing the ray that is cast from the eye through that pixel in the image plane. Then a collision is calculated between the ray and each object in the scene. (Google-search: ray-sphere collision) If there are collisions, the nearest one is taken. The surface normal is calculated at the point of collision. The ray and the normal are used together to calculate the reflected ray, which is then recursively used for calculating reflections. Additionally, from the point of collision, a ray is cast into each light source. If the ray does not hit anything, then the surface point that was hit is lit by the light, and this is added to the result, multiplied by the cosine between the ray and the surface normal. This is a condensed explanation off the top of my head. More details in this source code and in other materials readily available online.

[@imkow]

+Bisqwit Thank you Mister so so much ! that's very helpful. it's gonna take me days or months to digest those words...these knowledge alone are enough for opening a college in some university.. every part of procedures you just described is interesting and tricky enough(to be made into a series of tutorial videos, :D)...To mimic from this , I'm gonna try to realize a basic primitive reflection of lights on a graphics API called JavaFX, in a sample program just to test those freaking math......

[@igorthelight]

Do you want to know how to do this? Here you go! Thank me later! :-) thebookofshaders.com

[@Engired]

Make sure to watch in 144p if you hate pixels.

[@Kanerade]

I just can't get over that typing speed

[@duuqnd]

R T X O N

[@conformist]

R T X O F F (10 giga rays)

[@JoneKone]

@@conformist But you don't get it do you, NVIDIA RTX card doesn't use 10 giga rays, it uses few rays and then smooths the resulting reflection with AI learning algorithms..

[@JoneKone]

@@Zuluknob kzbin.info/www/bejne/lXWzg6dpdsiIe7s

[@ShakeWelBe4Opening]

This video just made me realize how scary awesome contemporary computing is. 😧😧

[@XChristmasManX]

if there is no rape then it aint manly enough

[@silencethequiet]

14/10 on the music, Bisqwit!

[@marcelojaviertwt]

AMAZING, MAN!!!

[@Domarius64]

I can see why you made this available in 4k etc. The compression really messes with the dithering effect at the lower resolutions...

[@Barty.Crowell]

I've never seen such detailed commenting in code. That alone makes this video incredible

[@gasher70]

For the first time, something actually looks good in 144p, not 1440p, but 144p!

[@thedutchgulcher4750]

144P BOIIIZZZZZZZ

[@KelGhu]

Wrong it's 144i 😂

[@白神遼岳]

I think that probably because the image quality becomes rougher, the dithering noise becomes invisible, which makes the image quality appear to be better.

[@tuseroni6085]

i like how most the comments are in english, then suddenly some comments in japanese. believe the first one (そろそろできました。すぐかんしょうします）translates to "almost done. nearly complete" and the last one （かんせいしました！ program complete. さって、かんしょうします）seems a bit trickier, first part is i think "all done! program complete" i'm just not sure about the satte, kanshoushimasu. it seems to be "now then, all done" which leads me to think i've made a mistranslation * goes to check the googles* ok, i think i have been mistranslating kanshoushimasu as kanshou shimasu not kan shoushimasu. and taking kanshou to be 完勝 but i'm thinking the part i translated as "nearly complete" should be "i'll run it soon" and the part i translated as "now then, all done" should be "now then, let's see it"

[@송민우-g1q]

He does have a steady hand. This is just a lot more than outstanding.

[@AKAProm]

Graphics have never gotten better than this

[@lukdub]

KZbin: Ray Tracing is going to be popular in many games, even in Minecraft. Let's prior tag "Ray Tracing" in my platform. User: But this video is 7 years old. o_O KZbin: I don't care...

[@Elenrai]

Lets hope youtube lasts a century or two, then its gonna get really fucking strange!

[@007bistromath]

okay listen, how did youtube know the exact video I needed to see while I am at peak robotrip thinking about physics this is one of the finest pieces of art I've ever seen

[@jamestolliver9970]

jesus, my 3 semesters of different intro programming languages did not prepare me to understand this

[@mariomariovitiviti]

you are my hero

[@Gahet]

Wow, this is seriously impressive, well done!

[@Zi7ar21]

4:3 Aspect Ratio is perfect on my iPad!

[@adam7868]

40 years back this would have not been possible

[@georgeallen7487]

+A23p Studios It would just very slowly.

[@codeinclined]

+george allen It'd take the length of this video to render one frame lol

[@siotsoni9854]

Yeah, K&R C is from '78 (if I recall correctly). 40 years ago would've been '76, and C++ was created as a superset of C.

[@markpenrice6253]

Nice one, Captain Obvious. Though that's only really true for home hardware. If you were extremely patient then something analogous could have been brewed up on industrial machines. After all, that's how the planetary sequences in 2001 were produced...

[@swifty1969]

@@markpenrice6253 what do you mean planetary sequences in 2001? As in the movie by Stanley Kubrick?

[@deus_nsf]

you have my utmost admiration sir

[@movAX13h]

Well,... nice but the educational part is reduced to code comments. If you ever wondered why people thought you were typing so fast (seen that in one of your vids): It's the clock in the top-right corner.

[@nostalium]

movAX13h So, is he typing really fast or what? I'm still confused.

[@sorae42]

tool assisted video