webnova

Build of wraitii/evnova-decomp for the browser with Emscripten. The upstream repo is a git submodule in extern/evnova-decomp and is not modified. Everything web-specific lives here.

Build and run

git clone --recurse-submodules <this repo>     # or: git submodule update --init
scripts/build.sh                               # installs emsdk into .emsdk on first run
scripts/serve.py                               # http://localhost:8080

Needs cmake (3.25+), ninja, git, and Python 3. Output is build/wasm-release/site/{index.html,index.js,index.wasm,ui/}; wasm-debug is the other preset (scripts/build.sh wasm-debug).

Game data

The game data is not part of the build and is never fetched by the page. The user supplies the EV Nova Community Edition zip from their own filesystem. The page unpacks the files the engine needs into the in-browser filesystem (/EV Nova) and persists them in IndexedDB, so later visits go straight to "Play". Pilots and preferences persist the same way.

Notes

• Async loop: the engine is a blocking loop with SDL_Delay(16). It runs unchanged by suspending in SDL_Delay: JSPI by default, or -DWEBNOVA_JSPI=OFF for ASYNCIFY.

• Exceptions: built with -fwasm-exceptions.

• The probe harness is disabled; the game is built with EVNOVA_WARNINGS_AS_ERRORS=OFF.

• Emscripten ports are prebuilt by scripts/build.sh (embuilder), because parallel ninja jobs otherwise race on the port cache lock on a cold cache.

• UI: in-page dialogs are Preact + htm components in web/ui/ (ES modules, pinned in web/ui/deps.js). web/ui/fs.js holds the virtual-filesystem access, and sdl_dialog_web.cpp just calls window.novaUI.

Licensing

The engine is MIT-licensed upstream. No game assets are in this repo.