Header-Only Game Framework in C | Game Engineering

[@arifkasim3241]

Finally....someone does it in C. Thanks.

[@gamecodeur]

This is pretty amazing. Incredible work. I'll use it to teach my students.

[@ultrahalf]

Man I wanna document my code like that

[@shankar4510]

I deeply appreciate your effort . Thanks a lot for this.Now I will reverse engineer it and learn it all .

[@johnjackson9767]

Great to hear it. If you have any questions, join the discord.

[@ThatOSDev]

Slowly I been working on my own. But it's nice to see othes who also use C. I also agree with all your points about C. 👍

[@GuilhermeTeres]

That's a very good, entertaining and informative video! I have been using gunslinger for a couple of weeks and it's simplicity and features really made it a good and pleasant framework to work with. I can't wait to explore it more, keep it up, John!

[@johnjackson9767]

First.

[@wh0d1s-l]

bruhhhhh

[@chandrakanth4241]

this is not fair.

[@theemeraldfalcon9184]

Cheater

[@johnjackson9767]

@@theemeraldfalcon9184 I wouldn't dare.

[@skaruts]

Well, I'm first too. In spirit!

[@toffeethedev]

You code just like I do and have all the same philosophies, I feel less alone you're awesome thank you!

[@LogicEu]

This is incredible. Been waiting for this. Thank you! Keep it up!

[@buddyze]

Just leaving a comment for th yt algo to pick this up quicker. The world needs to see this. Great job my guy

[@ishdx9374]

I love it, it looks really easy and awe

[@SoulsGamerBierre]

Awesome. This is helping me a lot to make experiments and study. Thanks, John.

[@ibrakap]

Looks promising i'll give a look, good job mate.

[@tommydrager5497]

wow, thank you for putting so much time and effort to make this accessible and presentable. The amount of content is overwhelming.. but this is defenitly a great creation of yours. Keep it up!

[@tochka832]

nice work, i surely would check this out, only started playing with c99/11 about two weeks ago, but this looks promising i really like the implementation of data structures as someone who coded in python before, really useful stuff

[@10e999]

Fantastique! Thanks for this detailed video. I really like your C programming style.

[@rlindner81]

Very neat framework, demo, and game

[@yousefali995]

I have been looking for a simple graphics framework for C, and finally I found an awesome one! Amazing!

[@botbeamer]

Really good work man 💯👍 I need to play with this at some point

[@voxelrifts]

I. Love. This.

[@johnjackson9767]

I. Love. You.

[@voxelrifts]

@@johnjackson9767 😂sure.

[@theemeraldfalcon9184]

Not first but like 15th or something idk Okay but in all serious, THIS. IS. SO. COOL.

[@ChukoByte]

Very impressive, keep up the good content!

[@ethanviolet1]

Awesome! we have been waiting paitently for another video :P

[@eboatwright_]

Ayyy Texas flag at 0:14 ! :D Also, this is really cool! I would probably use it if I used C XD

[@boris_raduloff]

Absolutely brilliant

[@pajeetsingh]

How to limit frame rate without using vsync feature? I tried calling (sleep) but it won't work.

[@johnjackson9767]

If you look in "gs.h" under my repo, look for the "gs_engine_frame()" function. I limit the frame time in there based on a user set frame rate, and it should give you ideas on how to implement it for your own stuff.

[@pajeetsingh]

@@johnjackson9767 Yeah thanks. Got that working using nanosleep instead of sleep.

[@SB-rf2ye]

really cool work, though it's not strict/pedantic c99 standard conforming, as it seems to use gnu extensions like unnamed structs and unions in your gs_vec structs.

[@johnjackson9767]

Yeah, this is something that's been pointed out and is being changed. I'm considering switching to c11, since it's become more supported as of late.

[@SB-rf2ye]

@@johnjackson9767 I use a named struct inside union as : typedef union blah_un { float i[2]; struct { float x, y; } s; } blah; Then use it like blah b; b.s.x = 1; b.s.y = 2; Little bit extra typing, but not required to switch to C11.

[@commandershepard1944]

Looks great

[@NeZversSounds]

Oh, that means no fighting to get GLFW to compile?!! I love Raylib for its ease to use and this looks like Raylib on steroids.

[@johnjackson9767]

Yeah, the default platform layer includes a header only version of glfw.

[@skaruts]

c99 header-only, sounds quite easy to bind with Lua or Nim (or others). Sounds tempting to me. :) Also especially because of snake_case, which is what I rather use. Raylib, though nice, uses PascalCase, which triggers my OCD...

[@johnjackson9767]

Word on the PascalCase comment.

[@nickheyer]

Down with OOP

[@zedrex3597]

What things do I have to learn to build something like this on my own someday?

[@shankar4510]

can you tell me where you started ? your programming history ?

[@sirdiealot7805]

So this is a bit like Löve, only C instead of C++ and Lua.

[@KanjiCoder_RTFM]

I was trying to use Nuklear and disapointed that glfw is an empty repo that needs to be built ? And Nuklear uses it ? Now I remember why I wrote my own win32 and opengl function pointer library . I just want to compile a single file and be done . No make files and build scripts .

[@johnjackson9767]

@@KanjiCoder_RTFM Yes, Nuklear and Dear Imgui don't make assumptions about platform. They provide samples that show how to hookup to various backends for this reason. I vendor glfw, emscripten and Android backends default platforms to get around some of this headache, although that's controversial to some in what a framework should do.

[@KanjiCoder_RTFM]

@@johnjackson9767 I think for adoptability of a framework , the less brick walls the better .

[@KanjiCoder_RTFM]

@@johnjackson9767 I don't know what I am talking about here . But possibly make things just "work out of the box" and have a way where the experts who know more about linkers and build systems can do their thing if they so choose ?

[@bonus5804]

I have a question about slot arrays: if I add an item, store the handle in two different places, erase the handle from one place. Now if I use the handle from the other place, it'll be invalid, BUT what if in the meantime, someone added items in the slot array, is it possible that the other handle says that it's valid, although it doesn't correspond to the right item?

[@johnjackson9767]

Correct, this would be something that could be addressed by splitting the handle into a generation and index bit pattern, similar to how a lot of entity component systems work. You'd have 8 bits for the generation and 24 bits for the index, and you check the generation to see if it's valid before use. That way you could delete and reuse an entry 255 times before it wraps back around.

[@bonus5804]

@@johnjackson9767 Ok thanks for your answer!

[@michawielgus9827]

Wow its so clever to put all game data into single structure xd

[@johnjackson9767]

I'm well known for being clever.

[@michawielgus9827]

@@johnjackson9767 well i discovered you just tonight, after watching minecraft remake in pure C in 48 hours (you commented there)

[@thanhlongtran9163]

Why does the user need to define GS_IMPL? I saw this in a lot of other libraries, too.

[@johnjackson9767]

Since it's header only, all of the implementation code is wrapped within implementation guards. So it needs to be defined once that way the implementation will be compiled once and only once.

[@thanhlongtran9163]

@@johnjackson9767 Can't you do something like #ifndef then #define?

[@johnjackson9767]

@@thanhlongtran9163 You could, but then the user has no control over where it's to be defined

[@sukhchainsingh3894]

Amazing.

[@sdsdfdu4437]

Dude you're awesome. I could use this for a 3d game, right?

[@johnjackson9767]

Yeah, definitely. I've updated quite a bit since then (added web and android backends), and I'm currently writing a util for 2d/3d physics. Join the discord, quite a few people there who are using it if you have questions.

[@sdsdfdu4437]

@@johnjackson9767 cool, thanks, I'll check out the discord. Are you writing physics from scratch or using an existing engine?

[@johnjackson9767]

@@sdsdfdu4437 From scratch, so I can avoid any external dependencies

[@fleaspoon]

Amazing

[@vellendev]

Do you plan to provide Vulkan as a backend like you currently provide OpenGL as an option, or will you leave that for someone to implement themselves if they need it?

[@johnjackson9767]

It's on the roadmap for one I'd like to provide.

[@pedrogabrielnogueira1068]

How the heck is this even possible? How many years have u studied and programmed in c? Which books have you read? Needless to say the incredible work. I'm starring gunslinger

[@johnjackson9767]

Thanks, man. I've been programming professionally for about a decade, c/c++ are my main languages. Just keep at it, you'll get comfortable with it all.

[@pedrogabrielnogueira1068]

@@johnjackson9767 Aye aye, sir! I'm never giving up neither on C nor C++ T-T C and C++ will never get boring :v

[@2k7u]

I wish i had these coding skills XD

[@maholet]

Opengl::opengl_compile_shader::shader: 'gs_immediate_default_fill_shader' FAILED_TO_COMPILE: 0:1(10): error: GLSL 3.30 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, and 3.00 ES

[@johnjackson9767]

Is this with the pong example or the project template?

[@maholet]

@@johnjackson9767 It's gs_progect_template on Linux Debian 10. Build of App was ok, but compile of shader has failed at start. "App: ../third_party/include/gs/impl/gs_graphics_impl.h:896: gs_graphics_shader_create: Assertion `false' failed."

[@johnjackson9767]

K, should be easy enough to fix.

[@needlessoptions]

👀 !

[@G33KN3rd]

since it's a game framework, perhaps you should rename it to *"Funslinger"* ;) Also, for code naming, `frmwrk` is the same length as `engine`.

[@TheRealFFS]

But more awkward to type.

[@johnjackson9767]

Lol

[@Gabryx_]

maybe fwork that is one character less than engine

[@tochka832]

i don't think that it's a good idea to name things in a certain way just because it's easier to type like, yeah, frmwrk is short, but it's code that many people will use and do they have to guess what all the things mean? frmwrk is kinda alright tho, but if everything is named like that then it's fucked

[@PissMasterPlus]

@@Gabryx_ Maybe fork, because I'm hungry.

[@CNLohr]

In b4 one of the rustites say "WHY NOT RUUUUSSTTTT"

[@johnjackson9767]

Wouldn't be the first time. I've enjoyed your vids, man. Thanks for commenting.

[@CNLohr]

@@johnjackson9767 Would you be up for joining my discord - we are discussing a presentation on idiomatic C in 2021. Would love your input.

[@johnjackson9767]

Sure thing, what's your link?

[@AntonioZL]

WHY NOT RUUUUSSSSSTTTT Because I don't want to.

[@KanjiCoder_RTFM]

Can I use this for UI ?

[@johnjackson9767]

@@KanjiCoder_RTFM Yes. It has an immediate mode gui extension I've since added that I use exclusively for personal projects.

[@KanjiCoder_RTFM]

@@johnjackson9767 Cool . I'll keep you in mind . I already stubbed raylib into my current project . But I'll take a look at your stuff the next time I write a project . I am assuming your project would be an easier way to build Nuklear into my C projects ? I saw one of your videos messing with Nuklear .

[@lifeless9768]

why did you stop using visual studio?

[@johnjackson9767]

A simpler text editor is all I need.

[@vincenzopanella2705]

Why reinventing stl ? i see this as a regular occurence,

[@johnjackson9767]

Two reasons: - There's no "stl" for the c standard lib, so it's necessary to write your own implementation for various common data structures or find an equivalent that someone else has written. - There is no such thing as "reinventing the wheel" with regards to software.

[@vincenzopanella2705]

@@johnjackson9767 Well I think there is , writing a set of vector functions over and over again is against software engineering principle, being a software engineer fro 20 and more years I 've come to the conclusion that every piece of new software must be written with less and less code entropy, just my opinion though

[@johnjackson9767]

@@vincenzopanella2705 Most legacy, institutional software *is* entropic simply by nature of it being legacy. There's no avoiding that. One only needs to look at what modern c++ has morphed into to see it.

[@vincenzopanella2705]

@@johnjackson9767 I must say though that the idea intrigues me a lot.

[@deanvangreunen6457]

Second

[@gamecodeur]

late

[@decodedbunny101]

Can you do BATCH now (.bat) Try it lad

[@chandrakanth4241]

third