Creating a DOOM (Wolfenstein) - style 3D Game in Python 

I cant imagine the amount of editing that went into this, thanks for making the world a better place brother

This is really like a dream come true tutorial. Keep making these awesome tutorials. You are helping thousands of developers who can now understand how 3d games are coded.

As a programmer, mainly databases, but programmer non the less, I always wondered how fps games are made. It's a wonderful tutorial and education. Thanks for sharing your hard work with the world! Greetings from Honduras!

Thank you for this! I've so far only been able to accomplish super simple projects. By having everything laid out so explicitly I am going through the motions of a more complex project and learning a lot as I go and building confidence. Thanks so much!

This is so freaking cool! The project is incredible for picking up and building something yourself. I am certain it will blow up in recommendations one day.

I love your compartmentalizations of your classes and methods. You’ve inspired me.

just one of the best tutorials i've ever seen ! Excellent works thank you so much !

Aww man, this is so cool. First time I see something like that. Ive always wanted to actually see someone program like that. I kinda knew who it theoretically works, but watching it like that, with your explainations, just awesome. Thank you so much. I actually recently played Doom 1 again, so funny.

This was awesome, love how the raycasting part is just 15 minutes. Really dissected the that part and now I finally understand every single thing about it!

Amazing tutorial, I always look forward to your videos

First of all Thank you so much for all your hard work and dedication !!! Great job mannnn ! When I initially show the game, I thought its going to be highly difficult to understand, but you really made it look nice and worth trying. Path finder part was just awesome intro to the game. A good learner will not only learn coding part but also about managing modules and files properly, what an experience !!! Thank you again.

Someone literally took this game's source and selling it on Steam as Project 0. LOL

You are continously increasing the quality of your tutorials, this one is in my opinion the best and most interesting one. Congratulations and thank you for your great work!

A whole engine in the first 15 minutes, great job man and amazing code structure!

i got recommended this. your format is fantastic. i can tell that a lot of effort goes into these videos. kudos.

That's awesome! So glad to see cool games and tutorials coming with pygame library.

I found this fascinating! As a competent programmer, but having never written games, this was awesome! Thanks for taking the time to make it and get the presentation super slick! 😁

Can't believe how organized the code is, you're a beast!

Amazing work :-) I appreciate the way your work is so well organized.

Thank you! Fantastic tutorial and so well explained. I was never good at trig, but you've explained it well.

Wow, this is an impressive tutorial, nice stuff

So detailed yet brief, excellent work

holy code! That's fast pace, but it's incredibly smooth and clean. Awesome tutorial!

Thank you very much! I started programming a few months ago, I started in Python. I learned a lot from this video, I spent a whole day on it. I already had the math basics, so I wasn't scared of raycasting, pathfinding algorithms and projection. I even improved the game a little bit: added levels, enemy lifelines, the menu, even a map in the corner that can be switched on and off, with different coloured dots depending on the enemy type. I've also improved my object-oriented approach. I have improved in several areas, so thank you!

This is a great demonstration of gradually adding features and testing along the way. I find when scripting, I try to jump ahead to the end state of full functionality sometimes, causing me to encounter errors and get stuck in debugging. This video offers good insights into how to break up a complex set of interacting functions, attacking them individually and gradually integrating things together.

Clean and simple-looking implmentation. When you see this type of code, you know the person knows his stuff.

This is an amazing walk through, thank you for sinking so much time into this video.

Great tutorial, really showing all the logic around, thank you!

Never seen anything like this before. Everything from the explanation of maths to the coding is spot on 😯😊

I'm a python dev also and the level of organisation you displayed was wonderful. I would love to manage planning steps like that.

This is an amazingly detailed tutorial and explanation. Thank you so much for sharing your knowledge

RU-vid is a great place for such a great piece of explained knowledge! Thanks!

Man I found your videos a while ago, and just now watched this. I needed to learn about many topics covered in this video. Your code structure is very clean also and has been an excellent example, thanks!

Even though this is a scary project to tackle as a beginner like me, by coding along I'm still able to learn a few new things and improve, so thank you for the effort you put into this! Also, I really enjoy how well structured and organized your code is. I'll definitely try to adopt this style on my own projects. I haven't watched the whole video yet, but it would be awesome if you covered the "Doom fire algorithm" in python/pygame, it's really interesting! Cheers!

Sick video man, I always look forward to your next video

You deserve million subs for sure! Thank you for sharing this with us for free!

Thank you so much for this. Your video/project was the base I needed to create my own version of the game. I managed to make multiple levels in which you have to defeat all enemies and advance to the next. I also added more enemies and the more you progress the more enemies will be on the level. Oh and I gave each level its own music

As a beginner, I just copied the code myself, because I understand the math very well, but I can not program. With the very good structure and very good explanations, and because I repeated many parts of the tutorial over and over again, I learned a lot in the process. Thank you for the very much and hard work you put into these tutorials of high quality. For me, they are the first tutorials that I really understood and motivated me to continue.

ngl i never watched long videos but this one made be watch it through the end without even realizing the time, such a slick video, Great work

please keep doing long video formats like this! this is awesome

Amazing tutorial! I fooled around with pygame a few years back, but I could never quite figure it out. I guess that I would be the one creating the sprites while a real programmer would put together the code such as this one. Loved watching you work!

People like you are heaven sent, I can imagine the sleepless nights you spent on this, thank you. Continue creating similar with lenghth 1-2 hours, your content is invaluable

That was very informative, well explained and animated. Thank you.

One of the best video I'll ever see, great work.

Damm, this looks impressive. I'm currently watching just for entertainment, but maybe after I finish my current pygame project I'll actually follow this tutorial.

It's awesome the scripting time and dedication to code all that. Sorprendente el tiempo dedicado a la codificación y el cuidado de tantos detalles así como lo bien ordenado del código en los distintos archivos creados. Solo de pensar en los programadores de id software (John Carmack, John Romero, etc.) se queda uno fascinado por tanto trabajo, sobretodo en ray casting, colisiones con las paredes, la elaboración de los mapas para los niveles y otros tantos detalles. Ahora que aparecio este video lo disfrute y aprendí cosas nuevas en programación. Buen trabajo y felicitaciones.

Amazing work. Learnt a lot from this. Thank you!!

10 minutes of this video has given me 2 days of study. you've done a great service, thank you.

Nice, I would love to learn from it!

your videos are incredibly high quality, not sure how you don't have more subscribers yet but if you keep this up you're guaranteed to get them

I am more than impressed with the quality of your tutorial and your explanations, congratulations! I subscribe directly :)

Brother, this is a piece of art. This entire work... is a piece of art. Thank you for your dedication and hard work in creating it. You really made it count!

Great video! I've seen many of these ray-casting treatments, and have done a couple ones myself, this is one of the best and full treatments. That said, basically in almost all of them, one fish-eye lese effect is still left unadressed. There are actually 2 kinds of those in a typical ray-caster, for 2 different reasons - the second one is more slight, and also more subtle to spot where it comes from - which is the choise of using angle deltas to compute ray directions: In a rectilinear projection as the one used here, that choise makes the rays hitting the projection plane distributed along it non-uniformly, where they get more spread-out around the center and more clumped together closer to the right and left edges of the screen (where this second fish-eye lense effect becomes noticeable). The full fix for that is to instead step along the projection plane itself (in this case, a projection-line, as it's 2D ray-casting), at a constant step corresponding to a fixed width of the columns. Then, the ray direction are the vectors from the player's position to those points on the projection-line - but normalized.This ensures the distribution of the rays is uniform across the screen, removing that fish-eye lese effect.

This is a great video! I like how you go in depth on the mathematics and the visual representation with lines and colors really help a lot. Would love to see a tutorial on a Duke Nukem 3D / build engine style game with stairs and vertical movement :)

An hour is about max for my attention span when watching a programming video, and most tutorials end up being too slow for me to follow up on once I start. This one hit the sweet spot. I don't know much about pygame or game development in general, but pretty much all of the questions I had about it were answered-at some surface level at least-during the time it took to watch this. Really well done 👏

Wow! It's amazing the power and simplicity of python. Thanks for the tutorial.

So there are some things I'd improve: 9:13 in so far -Compute player movement without using two (slow) trig functions every frame the player moves (Update: checked the underlying C source code for pygame, it's using a sqrt() function, not any sort of optimized square root approximation, so it's likely the trig is faster.) -Use a clamping method to make the player's whole circle, not just its central point, get stopped by the wall but this is easily the highest-quality pygame tutorial I've seen so far, I'm excited to follow it.

Excellent, I only used pygame for 2D games, so far. This was very educational, and I think the first thing I'll add is the controller support to save my keyboard. 😁

Wow tremendous job! Thanks for your efforts!

OH MY GOD !! Super Awesome !! Love you a lot for sharing your knowledge. You just inspired me to learn to code and study more math even though I don't quite understand the math part but I really enjoyed watching. 😆😆

Don't be deceived by the short run time... this project is beefy and it comes at you real fast. Thank you for this... the math makes my head hurt but I feel it's getting clearer the more I look at it and practice.

I had texture smudging and ended up having to do a little bug hunting. I accidentally had a: objectToRender = [] Instead of: objectsToRender = [] Always remember to check your variables! I've been doing this tutorial when I'm getting distracted from school work. I've been putting my own spin on things, with plans to make it more modular so it functions more as an engine. Very good tutorial!

BRILLIANT, now I just got the perfect tutorial to start the games dev and understand deeply how engines work. GOOD JOB BRO

Thank you so much for this! Also love the How It's Made Vibes

Very nice Python tutorial for creating a DOOM style game. The only major issue that I can see here is the mixing of the "Engine" code with "GameLogic/Rules" code. With this type of approach it will make it quite difficult to reuse the "Engine" code within future projects. Coming from a C++ background the "Engine" code should be completely agnostic of any Game Logic code. It should only be responsible for knowing how to draw elements, knowing how to process sound and to trigger user events, calculating basic physics - collisions, processing animations, networking, and resource(assets) management. Anything that is game related such as the assets themselves(textures, sprites, audio files, etc...), game logic, rules, personal settings, etc. should be abstracted out of the engine into its own project. The Game project would rely completely on the Engine project where the Engine project should have no dependencies on the game itself. This would allow for more of a modular and generic programming style to give the developer ease of use of reusable code down the road. In simple terms if you wanted to make a second game with this approach all of the "Engine" code or boilerplate code would already exist as a library. You would only then need to include or import it into a new "Game Project" and add the necessary game logic for the next title. Maybe in the next title you want the player movement to be different, maybe you want a different camera style such as 3rd person, maybe you want to add new abilities such as crouching and or jumping mechanics... Having these layers of abstraction early on helps in the long run. Other than this type of programming philosophy, this video is very well done on quickly explaining all of the required steps into making a DOOM style game. Then again one could argue that "Pygame" is that engine... I'm use to writing the actual DirectX, OpenGL, and or Vulkan code to implement the renders and shader modules.

as someone who recently started learning python, this is absolutely mind blowing

Идея и видео классные, захотелось посмотреть и повторить! Спасибо за этот огромный труд!

Damn... clean n swift! after almost 30 years I finally understand the hell that Carmack went trough while creating their masterpiece at id. Thanks bro! very educational!

That is a great guide! Maybe you also have an advise about how to make a non-static floor? I mean, if I would like to have different textures, like in the case of walls, how would you do that?

Impressive. Python is probably about my 4th language after C#/C++/JS, not done anything large apart from a Django ecommerce project, so a pygame would be interesting, just never had to use anything other than Unity or UE to create a large game. Good stuff and interesting to see python used outside of server side web dev. 👌🏽

This video is one of the best tutorials I have ever seen. Perfect for a beginner who wants to learn the basics of raycasting. The mathematical explanations were really interesting. For my part it was my first experience in Python. Very easy to set up and run things quick with just VSCode. As I have a lot of experience in javascript and C#, the next step for me would be to explore the whole thing in the unity universe :). I also really like the idea to start from this project and build biggest maps (or even a tiny virtual world) with this pseudo-3d retro style.

This is insane material. Thank you for sharing.

And if you get errors when running the source code, first make sure you have Pygame version 2.x.x

What has the world come to, we can now write DooM in one hour.

This was great. I learned a lot. Thanks for making this video.

what an awesome tutorial. everything was explained perfectly and the it worked quite well. thanks

I get this error 'line 18, in get_objects_to_render wall_column = self.textures[texture].subsurface( ValueError: subsurface rectangle outside surface area' And I don't know what to do. Tried looking up on the internet, but the explanations are far beyond my comprehension at this time. Did anyone else encounter this problem? How did you solve it?

Someone's seriously trying to sell this on Steam.

This video rules, great job man. Amazing explanation.

we've got problems, somebody published your doom tutorial on Steam without changing any of the assets, and called it "Project 0".

While this tutorial definitely had some great merits and I really learned a lot, there are some areas that I felt needed improving. The speed of the automatic voice narrator was very fast, along with showing what to do, but at least that was remedied by adjusting the playback settings in RU-vid to a slower speed. And, rewinding a lot. Also, towards the end I noticed that some parts of what was shown in the final result of the game did not match up with the coding you showed along the way. It appears that a lot of information was left out: the extra soldier sprite and Hell Demons, the "Victory" screen, background music, larger map layout, and the additional red torches. I was confused as to why my final result didn't match up to what was shown in this video until I compared the files on your GitHub and noticed some code blocks were never mentioned in the tutorial. While I do understand that a tutorial can help give a basic understanding of some things, I feel that it would be beneficial to also mention that the final result shown on screen will differ to what was presented code-wise, and to use the knowledge given in the video to try and implement the rest on one's own.

man, this is awesome fr! thanks for this vid.

That was awesome, thank you and keep going !

4 lines into the main script, got 7 errors and gave up.

Excelent tutorial. Hard work is celebrated!

I've learned a lot and will continue thanks to you. Thanks👍

Thank you for the informative and educational video!

Es lo mejor que he visto, lo intente y voy en SPRITES....es increible y genial GRACIAS HERMANO POR ESTO !!!!

GREAT JOB! I started teaching my kid how to program in Python. Your code is a great resource and a motivator for him to see what he can achieve with less than 1000 lines of code.

I spent about two hours to understand and write the code of the first seven minutes of this video. Absolutely incredible work, looking forward to finish this!

amazing and very cool video, even discussing the formulas used. Makes me want to study math again. Thanks for the video.

Thank you for making this. This is a good capstone idea.

Well done and well explained! You've earned a new sub.

Great Channel! Thanks for your hard work.

Thanks gor sharing such great project ❤

Man... This was beautiful. Every 5min or so, I was trying to click the like button again...

Hey there, Wanted to give a big thanks for going through likely days of researching, testing, and editing together this project. Used to be reluctant about following along videos because it seemed too much like copying, but I also learned that’s how we learn. I learned a lot about organization by getting used to how everything was structured, learned how to coordinate my mental reasoning more efficiently, and most of all, learned a lot more about bringing python beyond the shackles of 2D. I have 15 pages of notes. I’d take time to first code along with the video during my homeschool week, then during the weekend, I’d dissect all the mathematics and mechanics on paper. Mind you, my previous game was just two-player atari breakout (and god, how horrified I am about my old code, no words). Previously, I only learned code just for the sake of being able to read it, being able to pass tests on documentation, never intended to make anything. But ever since, I’ve been working towards game development as a side.

TNice tutorials comnt from you is legendary. Uncomplicated like your video!!!

Awesome, great video!

Thank you for all the work you've put into making this project and video. Stunning.