Sand Simulation Written in Julia -> WASM (Web Game)

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Hey everyone,

Sometime last year I started tinkering with StaticCompiler.jl for fun. I was able to PoC getting it to work with SDL to create web builds. I was able to write the actual game logic in Julia and convert it to WASM. The game is very simple, but I thought it’d be a good way to show off what I was working on. This is something I’d like to tinker with more and see what I can do with it. I don’t know if anyone has done something similar, but I thought it was cool to get Julia running in the browser. If anyone is interested, here’s the source code for this specific game: StaticCompilerGame.jl/sand.jl at main · Kyjor/StaticCompilerGame.jl · GitHub . The repo is really messy at the moment, but I plan to clean it up as I work on other projects within it. Also, I still am working on the commercial game. Things are taking longer than expected, but we are still making progress.

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This month in Julia world - 2026-01
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Very nice! I noticed that the water surface does not become level in all cases, I suppose it’s a limitation of the model?

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Thank you! Yes, this is a very simple version to show that it’s not too hard to create WASM code using Static Compiler. I adapted the code from someone else’s example

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This sounds great! Once you seem to be keen to work with wasm, I would like to make you aware of this thread. May be you get some ideas for synergy with other attempts on Julia and wasm.

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Interesting! I am curious about static compilation in Julia. Can anybody tell me the difference between StaticTools/StaticCompiler and JuliaC?

I think both can compile Julia code to native, small binaries. Is that right? How is one compared to the other?

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This is really nice and quite fun to play with!
Your approach to manipulate the game state is quite interesting:

Is it that julia in 64-bit uses wrong alignment for WASM 32-bit therefore you have to implement the accessor function manually?

I guess, I side stepped the problem in these experiments by using julia 32-bit for the cross-compilation. Hopefully this will get better in the future.

I am wondering if you considered to use MallocArray ? This allows you to use the regular julia array syntax A[i,j] = value (as long you use @inbounds)

Thank you for sharing your great project :smile:

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First of all, thank you!

It’s been months since I initially implemented that, but IIRC that was the issue! I guess I didn’t think about using julia 32-bit, but that’s a great callout!

I believe at one point I tried to use MallocArray and was having a bit of trouble understanding how to use it. I’ll take a look at your code and use it as a reference. Thanks!!

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