Life simulation written in rust

Related tags

Game development life_web
Overview

Life simulation written in Rust, inspired by this very old screensaver: https://sourceforge.net/projects/primlife/

Demo: https://joelthelion.github.io/life_web/demo/

Biots are allowed to evolve through mutation and natural selection. Biots have a simple genome giving them unique characteristics:

  • Green allows them to collect energy from the sun
  • Red allows them to eat other biots
  • Dark blue allows them to defend
  • Light blue allows them to move around

A special trait, intelligence (denoted by a square), allows them to move towards the nearest edible biot instead of randomly. All non-green traits cost energy.

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Comments
  • significantly decrease size of resulting Wasm file

    significantly decrease size of resulting Wasm file

    Explanation about the flags:

    • opt-level = 3 is actually redundant and can be removed but I prefer to have it here to state the intent. Could also be "z" for smallest possible size.
    • lto = "fat" means that we want full link-time-optimization support.
    • codegen-units = 1 means that we only want one codegen unit instead of the default which usually is 16. The effect is slower compile times for release mode but also improved optimization potential.
    • panic = "abort" means that we do not want to have backtraces and exception-like behavior in our Wasm file which is not really bad since it is unsupported in Wasm atm anyways and just heavily bloats our Wasm file.

    Using the above configs drop the Wasm file size from ~2MB to ~500kB on my local system.

    Furthermore we could use a wasm-opt -O3 pass over after the initial cargo build --release command. On my system this further reduces the Wasm file size by roughly 10-15%. The downside is that wasm-opt creates a dependency on the Binaryen toolkit which might not exist on your platform.

    opened by Robbepop 2
  • fix bug and avoid biots interacting with themselves

    fix bug and avoid biots interacting with themselves

    I did this fix in my fork of your project and it works there: https://github.com/Robbepop/life_web/blob/main/src/biot_collection.rs#L47

    Additionally this gets rid of the workaround with the offset.

    opened by Robbepop 1
Owner
Joel Schaerer
Joel Schaerer
GitHub
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