Rustybrain

This is a WIP implementation of Gbrainy https://github.com/GNOME/gbrainy. Unlike the official version, I set out to port using the rust programming language as i needed a project to put into practice what i learnt.

The original game uses xml with c# variable declarations embedded within, but this project uses javascript for variable definitions

<game>
    <name>Lever</name>
    <type>Logic</type>
    <difficulty>All</difficulty>
    <question>How much weight is needed at the polet indicated by the question mark to balance the lever?</question>
    <tip>Consider the sentence attributed to Archimedes: 'Give me a lever long enough and a place to stand and I can move the Earth'.</tip>
    <rationale>A lever is in equilibrium when the objects placed on it are at a distances reciprocally proportional to their weights.</rationale>
    <svg file = "lever.svg" x = "0.1" y = "0.1" width = "0.8" height = "0.8"/>
    <variant>
        <variables>
            let right_pos = 2;
            let left_pos = 4;
            let left_weight = 2 + Math.floor((Math.random() *8))* 2;
            let force = left_pos * left_weight;
            let right_weight = force / right_pos;
        </variables>
        <string text = "?" x = "0.66" y = "0.4" centered = "yes" size = "large"/>
        <string text = "[left_weight]" x = "0.18" y = "0.4" centered = "yes" size = "large"/>
        <answer>[right_weight]</answer>
    </variant>
 </game>

Project structure

• Most of the heavy lifting is done in the libgbrainy project directory. It handles all the game definition loading, parsing e.t.c Changes made here will affect all other subprojects.
• ffi directory hosts ffi bindings that can be consumed by external projects (mobile in our case
• wasm is used to generate WebAssembly bindings for use in the browser
• (mobile is flutter ui that uses both ffi (desktop, mobile) and wasm (web) to use the libgbrainy engine

screenshots

Yes visually not so appealing but the aim of the projects was never about making a flashy ui. It was always about me learning the ropes with Rust while working on a "real world " application which i chose to be a basic reimplementation of Gbrainy https://github.com/GNOME/gbrainy.

Tools used

Boa javascript interpreter for our game definitions

wasm-pack for building webassembly modules

dart_js_facade_gen For converting typescript definitions generated by wasm-pack to dartJs