(Image credit: Grow Now! Games)
Solo developer Grow Now! Games has put a playable browser build of its walkable ASCII cyberpunk city online, running on a 283KB Rust WebAssembly engine feeding a WebGL renderer. The build went live this week alongside a second YouTube video, ASCII City Update: Interiors, Elevation & Skyscrapers, following the original video, which has passed a million views and 9,000 comments.Go deeper with TH Premium: CPUThe page fetches ascii-city-engine_bg-DqjAhqbp.wasm, a 283KB module that reserves 1,152KB of linear memory at startup and reports an engine version of 0.1.0 when instantiated outside the browser. Its exports include initialise_native_game, step_native_game, and generate_native_local_map. Debug paths left in the binary name the Rust source modules behind those calls: city.rs, world.rs, population.rs, interiors.rs, and rendering.rs. World generation runs in Rust, which hands JavaScript base64-packed byte arrays covering building heights, tile kinds, surfaces, hues, saturations, window styles, lit flags, and floor plan IDs.The renderer requests a WebGL context and compiles a vertex and fragment shader pair, the fragment stage consisting of a single texture2D lookup. Characters are drawn once each into an atlas canvas with fillText, cached per character-and-color combination, uploaded to the GPU with one texImage2D call, and then drawn as textured quads with six vertices apiece.
