Making a Raycaster using Godot 4 Compute Shaders!

#devlog #godot #godot4
Source Code: github.com/binary-soup/Raycas...
Today we reanimate the "raycasting" rendering technique popularized way back in 1992! We'll take advantage of Godot 4's new compute shaders, as well as implement a ton of cool rendering techniques! Enjoy!
Credits:
[1] (Wolfenstien footage) • Wolfenstein 3D Gameplay
[2] (Quake footage) • Original Quake (1996) ...
[3] (Raycast tutorial) github.com/vinibiavatti1/RayC...
[4] (Godot 4 compute shader) • How to use Compute Sha...
[5] (Godot 4 compute shader) • Learn GODOT 4 Compute ...
[6] (Spiderman parallax) • how this game made mil...
[7] (Parallax mapping tutorial + textures) learnopengl.com/Advanced-Ligh...
Music (in order of appearance):
- Shadowing ~ Corbyn Kites
- Smoke Jacket Blues ~ TrackTribe
- Hopeless ~ Jimena Contreras

[@binary_soup]

Find the key hidden somewhere in the video then answer the cypher question: cipher.binarysoup.dev/?v=7-nOK0UrAzk

[@binary_soup]

Adventure on the Atari 2600.

[@emre5614]

Duck Hunt on some NES knock off. Also, when you're encrypting in the Vigènere cipher, you're not supposed to skip the spaces in the input text. So for example, HELLO THERE encrypted with the key "AB" would be "HFLMO UHFRF" and not "HFLMO TIESE".

[@binary_soup]

@@emre5614 Thanks for the tip! I'll have to update my cypher script!

[@willful759]

Fun fact: older consoles called the processor that did graphics a Picture Processing Unit, so indeed, a PPU

[@RadikAlice]

A famous example would be the NES

[@efeloteishe4675]

@@RadikAlice SNES not the NES

[@RadikAlice]

@@efeloteishe4675 The NES did too, don't be ridiculous

[@emre5614]

The Godot Engine uses OpenGL style normal maps, but there is another format of normal maps (usually called DirectX style) that has the Y axis reversed. This may be the cause of the problem you mentioned around 23:58. Also, I loved the video! The overall production and effort that went into this video really paid off! This is a production quality I would expect from a way bigger channel! I feel like I stumbled on a hidden gem! Not just that but the vibes it gives off is awesome!

[@Calinou]

There's an option you can use in the Import dock to invert a normal map's direction (Normal Map Invert Y), so you don't need to edit the source normal map manually in an image editor.

[@Myserval]

adding parallax mapping to a raycaster is such a good idea! I really really like the cutaway gags/skits too, good stuff, really glad youtube dropped this in my suggestion feed

[@SilverstringsMusings]

This channel has a lot of potential, here's a comment for the algorithm.

[@D.S69]

same here

[@dortuff]

A video on compute shaders would be really helpfull. This video is also very cool I like the comedy mixed in with the main educational points.

[@mr_diamond_gold9842]

Your sophisticated raycasting algorithm is called DDA (Digital Differential Analysis) raycasting.

[@unicorn_tamer]

I am sorry, but how do you only have 500 subs?! This channel deserves a lot more!!

[@bobfalfa-vg3jx]

Thank you for this video! I love raycasting engines but have struggled to find a high performance way to do it on modern systems. This is just what I needed to see. Thanks again and good luck on your future projects or part 2!

[@CheckovStuff]

I've also been working on a raycaster in Godot. Very cool to see someone else using different methods to achieve similar results!

[@tycho25]

If I had a nickel for every youtuber I'm subscribed to that's a dude with long brown hair with a slapstick sense of humor who uses jazz as background music I would have 2 nickels

[@Zurpanik]

This was a really cool video! Loved learning about this coolness especially after just recently migrating to Godot and loving it to pieces. Awesome stuff!

[@RaposaCadela]

Incredibly cool!! Look infinitely better than my attempt a while back

[@bratworst]

This is how I found out about the tan distortion effect. Thank you

[@gnitsaf]

this is an awesome video. great job.

[@psyboyo]

Great video, congrats!

[@smallconfusion8840]

I would love to see a tutorial. I haven't been able to quite wrap my head around compute shaders.

[@tankerguy05]

I just started using Godot, but I'm not new to gamedev. I've been wanting to make a raycasting game with python/pygame, but I'm finding it hard to understand the math. I thought I'd give Godot a try, not just for raycasting, but for gamedev in general. I thought I'd look up how easy it would be to implement raycasting in Godot, and to be honest it doesn't seem any easier. And since I'm new to Godot, and suck at any math past pre-algebra, I didn't understand a lot of this video, but it was still enjoyable to watch, and the end result looks really good.

[@breadman7733]

awesome video ! Thank you

[@iaso514]

Great video! Loved the explanation and the jokes ❤

[@MaplePolicy]

Incredible video!!!

[@mani_mincraft]

Great video! I want more of these lol

[@americanhuman1848]

made a raycaster and the first texture i tested was the classic source engine missing texture and it was in fact a trippy optical illusion

[@sebbl580]

very cool video 👍

[@CyTic5]

Really cool.

[@tommycard4569]

good vid, thx!

[@jamesrivettcarnac]

Compute shaders!

[@jimsantus8927]

is this more faster than the acutal 3d godot?

[@nika_251]

Ure the goat

[@cjdaylight3407]

can you post about doom style rendering

[@crimester]

you should try sdfs next

[@MrSkeleton14]

Too much math for my tiny brain

[@cjdaylight3407]

If we can use cpu for ray casting why we should not use cpu

[@binary_soup]

You can use the cpu, but it's just generally too slow to achieve good frame rates. The GPU by comparison is magnitudes faster since it runs graphics calculations in parallel.

[@cjdaylight3407]

@@binary_soup Thats seems right But we cane maybe give liltle bit calculation job to cpu and send results to gpu there is new tech Smart Acses Memory maybe it can do job

[@slvrcross]

I'm gonna come

[@bl8de3]

hello i love you

[@MyAmazingUsername]

Gray cats are cool but why didn't you just make a real 3D world and a shader and unfiltered texture sampling to make it look like old raycasting? That would allow you to have actual 3D shadows and lighting in your world too, and you could use models or sprites for enrmies. Very fun to watch your progress though. Very good editing. Fun stuff. Subscribing!

[@binary_soup]

I do have plans for a second part where I'll implement some cool stuff that would be very difficult in a traditional rendering engine, but fairly effortless in a raycaster. So yes there is a reason why I choose to use raycasting, but in retrospect I guess didn't really explain why in the video 😅.

[@MyAmazingUsername]

@@binary_soup Oh, I look forward to seeing that! :) Good luck with the continuation of the engine!

[@ttmso]

i like how he uses ai, also what ai?

[@GreenFox1505]

Godot isn't called GoDot.

[@nigeladams8321]

You understood what they meant

[@PeterMilko]

just use Unity :P

[@mr_sauce_cooks]

Why?

[@PeterMilko]

@@mr_sauce_cooks It would make it easier and better looking

[@nigeladams8321]

Why would it be?

[@PeterMilko]

because its a 3D game engine made for this stuff...@@nigeladams8321

[@user-og6hl6lv7p]

Just let corporation steal your content bro.