Show HN: A PSX/DOS style 3D game written in Rust with a custom software renderer

Re:Show HN: A PSX/DOS style 3D game written in Rust with a c... by nextaccountic on Wednesday September 17, 2025 @10:40AM (#45276406)

You talked about using Rust as a better C so I just wanted to ask, do you define any enums with payloads? (also called "sum types" or "tagged unions" in other languages) (edit: also called "algebraic tyeps" and there's an article about it in the front page, though this is a slight misnomer)

Things like

    enum Something {
        One(String),
        Two(i32),
    }

Also, how is your usage of Option? (one such enum)

I think this plus pattern matching is the foundation of Rust's superpowers. It's also very old tech and absolutely not Rust's invention, present in languages like OCaml and SML. Hence the early Rust slogan, "technology from the past, come to save the future from itself"

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Re:Show HN: A PSX/DOS style 3D game written in Rust with a c... by mvx64 on Wednesday September 17, 2025 @11:00AM (#45276678)

Actually yes! I use it when passing a texture into a draw function. I have a TexOrColor enum, and when calling the function you either provide an &Image or a &Color. Before that, if I wanted a colored textureless model, I passed a dummy 1x1 texture to sample from.

And of course, Options and pattern matching are easily the best part of the language and very powerful. I am obsessed with things like "let x = if {...}".

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