Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

Show HN: The full source code and assets for my custom game engine and game

news.ycombinator.com

Post reply on HN
Print view View original

21–30 of 38 posts

Re: Show HN: The full source code and assets for my custom game engine and game

#21

Post by mknsri »

corysama wrote: post #6
mknsri wrote: post #3

Earlier quoted context omitted.

I wanted to include common code for all shaders in a simple way, but I was too lazy write a proper parser. So instead I used the C++ preprocessor and macros to include things from common shader code and combine them in the build step.

FYI: https://docs.gl/es2/glShaderSource takes an array of strings and just internally appends them together. So, rather than trying to #include common code for all my shaders, I just pass a common_code_string and a shader_specific_code_string every time.

I could have definitely used that and I'm surprised I didn't realise it when researching how to include shader code. Luckily my setup required very little work and with my system I could share snippets between GLES and GL.

Re: Show HN: The full source code and assets for my custom game engine and game

#22

Post by becquerel »

Solvency wrote: post #9
funcantor wrote: post #8

You should probably give credit to Casey / Handmade Hero with regards to your windows platform code. Well its kinda scattered around, so probably just credit in general.

So... not from scratch?

Here 'from scratch' probably means 'from fundamentals', e.g. without a prefab game engine, as opposed to 'taking no inspiration or lessons from anyone else or using any library code written by other people'.

Though that would be one hell of a project.

Re: Show HN: The full source code and assets for my custom game engine and game

#23

Post by mknsri »

becquerel wrote: post #22
Solvency wrote: post #9

Earlier quoted context omitted.

So... not from scratch?

Here 'from scratch' probably means 'from fundamentals', e.g. without a prefab game engine, as opposed to 'taking no inspiration or lessons from anyone else or using any library code written by other people'. Though that would be one hell of a project.

I mentioned in a couple of places that I did use other people's file loading libraries (mainly Sean Barrett's excellent stb libs).

“If you wish to make an apple pie from scratch, you must first invent the universe” :)

Re: Show HN: The full source code and assets for my custom game engine and game

#24

Post by rootlocus »

mknsri wrote: post #23
becquerel wrote: post #22

Earlier quoted context omitted.

Here 'from scratch' probably means 'from fundamentals', e.g. without a prefab game engine, as opposed to 'taking no inspiration or lessons from anyone else or using any library code written by other people'. Though that would be one hell of a project.

I mentioned in a couple of places that I did use other people's file loading libraries (mainly Sean Barrett's excellent stb libs). “If you wish to make an apple pie from scratch, you must first invent the universe” :)

> “If you wish to make an apple pie from scratch, you must first invent the universe” :)

This is something I posted on Casey's first handmade video, together with some counter arguments to his rant on the shortcomings of c++ and windows. He has since disabled comments.

Re: Show HN: The full source code and assets for my custom game engine and game

#25

Post by gregjw »

mknsri wrote: post #15
dumdumchan wrote: post #13

Why did it get deleted from Play Store?

The HTTPS certificate expired on my privacy policy page and Google delists the app when that happens. After you renew they require that you resubmit the app and I didn't bother since there were barely any downloads then.

Tedious

Re: Show HN: The full source code and assets for my custom game engine and game

#27

Post by mknsri »

ne0flex wrote: post #26

More of a general nooby question: what would be a good way to read through code like this? Where to start? How to understand what's going on and when? etc.

It depends a little bit on how comfortable you are with the platform and the technologies used in the codebase. Generally speaking you would look for the entrypoint into the application.

For Hockey Slam you can look for the entrypoint in Windows:

https://github.com/Mknsri/HockeySlam/blob/main/windows/win_m...

or Android:

https://github.com/Mknsri/HockeySlam/blob/main/android/app/s...

Then start tracing through, looking at any function calls that look like they contain anything interesting. Additionally in this project you can jump straight to the entrypoints of the game code:

https://github.com/Mknsri/HockeySlam/blob/main/game/game_mai...

Or the rendering code:

https://github.com/Mknsri/HockeySlam/blob/main/ogl/ogl_main....

Another way would be to look at the files and see if anything catches your interest, for example if you want to learn about the UI system, you could look at how a button is defined:

https://github.com/Mknsri/HockeySlam/blob/main/game/imui_sys...

Fabien Sanglard has great articles on studying classic video game engines, and could be used as a guide on how to approach codebases: https://fabiensanglard.net/quake2/index.php

Re: Show HN: The full source code and assets for my custom game engine and game

#28

Post by dcuthbertson »

mknsri wrote: post #19
axus wrote: post #10

Congrats on finishing the game, it's an accomplishment

Thanks! Finishing such a large project feels great and you learn a lot when you have to implement so much you take for granted when using things other people have built

Yes, congratulations on finishing the game! Also, thank you very much for sharing the story of making it. I'm more inspired than ever to keep dev logs for the little side projects I work on. It's important to keep track of progress, reflect on where you were early on, and see how far you've come.

Re: Show HN: The full source code and assets for my custom game engine and game

#29

Post by mknsri »

dcuthbertson wrote: post #28
mknsri wrote: post #19

Earlier quoted context omitted.

Thanks! Finishing such a large project feels great and you learn a lot when you have to implement so much you take for granted when using things other people have built

Yes, congratulations on finishing the game! Also, thank you very much for sharing the story of making it. I'm more inspired than ever to keep dev logs for the little side projects I work on. It's important to keep track of progress, reflect on where you were early on, and see how far you've come.

Exactly! Thanks for the kind words

Re: Show HN: The full source code and assets for my custom game engine and game

#30

Post by idrios »

You wrote an Android app in C++.

...how!? How did you even learn how to do this? I've never seen a github repo or documentation or tutorials that even mentions doing this. Nothing on the developer.android website, nothing in any YouTube tutorials. I'm blown away.

Post reply on HN