- a rider's effects are stored in the deck's frame: standing still on the Thunder Bluff lift, a weapon enchant's streak hung four yards below the blade and through the floor, because its edges were laid down in world space while the car climbed out from under them — the reference folds the transport matrix (translate · Rz(facing), NULL on the ground) into the emitter at birth and back out at draw, so committed content rides the deck and only a boundary re-expresses it; a `RideFrame` on the rider's model, inherited down the parent-model chain the way the reference copies the transport pointer to every child each frame, one fold at birth, one at draw, one at the boundary — ribbons take it unconditionally, world-mode particle clouds take it, model-mode clouds never see it; measured on the car: streak 4.2 yd → 0.00 over a 49 yd climb, while the same rider thrown off the top streaks 0.9 → 24.8 yd on the way down - switching away from the window while riding a lift dropped you through it: a collider moved in `Update` is invisible to `Update`'s own spatial queries until the next physics step, so on a 1 s frame the deck descended 7 yd with its broad-phase box left behind, the ground probe found nothing under the feet, and the second long frame's clamped 250 ms of gravity put them under the deck; avian's own `update_moved_collider_aabbs` now runs inside the transport chain right after the deck moves (0.03 ms p50, flat across scene density), and `WOW_STALL` injects long frames on demand, since a probe window is never throttled by the OS - `WOW_TRAIL_CENSUS` prints each live ribbon trail's world-space spread beside its spread on the deck — the pair that separates "not riding" from "riding but not folded"; it first matched zero trails in every scene by requiring a component trails deliberately never carry, recorded rather than quietly fixed, because an instrument answering a confident zero cost an afternoon Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Important
Issues and pull requests are closed here. benilla is a solo project developed in a private tree; this repo is its export, published as squashed snapshots, so a PR here has nothing to land on. The best way to contribute is to join the Discord and report the bugs you find. Questions and ideas are welcome in the same place.
benilla speaks the original 1.12.1 protocol, so it connects to any server the real client could, and reads its game data at runtime from your own 1.12.1 install. Every file format and the network protocol are implemented from scratch, with no original client code, no third-party WoW crates, and no bundled game assets.
What works
- Formats: readers for the full asset stack (MPQ patch chain, BLP, DBC, ADT/WDT/WDL, M2, WMO), wired into Bevy as an asset source.
- World: streamed terrain out to the horizon, portal-culled WMOs with interior lighting, doodads and ground clutter, swimmable liquids, sky and weather, and the client's own day/night lighting, fog and gamma passes.
- Models: GPU-skinned M2s with the full animation controller, a near feature-complete particle system, ribbons, and animated gameobjects from doors to lifts.
- Characters: customization end to end, the armor texture composite, weapons with sheathing and enchant glows, shapeshift forms, stealth and mounts.
- Movement: a WoW-feel controller, networked movement in both directions, the server-granted modes from slow fall to roots, a follow camera with collision, boats, zeppelins and taxi flights.
- Networking: SRP6 auth through world-session crypto, the object mirror into the ECS, and live wire coverage from movement and chat through spells, party, quests, mail, trade, vendors, bank, loot, the auction house and PvP honor.
- UI: a from-scratch FrameXML + Lua engine driving the built-in interface, from the login and
character screens through the full HUD, the classic windows (guild, macros and key bindings
included), chat, nameplates, floating combat text and tooltips; third-party addons load from
a
benilla-config/AddOns/folder beside the executable (partial — see below). - Combat: melee on the faithful swing law, ranged and Auto Shot, casting with GCD and cooldowns, combo points, crowd control that really holds you, and the spell visual pipeline.
- Audio: music, ambience and SFX under the client's own selection and crossfade rules, with interior and underwater transitions and zone reverb.
Not built yet
Battlegrounds. Third-party addons are partial: AtlasLoot and Bagnon run, and the addon API fills in as other addons are tried.
Running it
You need a 1.12.1 (build 5875) client install for game data, a vanilla server to connect to, and stable Rust. Any 1.12.1 core works; vmangos is what development runs against, and cMaNGOS and the rest speak the same protocol.
WOW_DATA=/path/to/WoW/Data cargo run --release -p benilla
The server defaults to localhost:3724, the stock realmd auth port. Point WOW_HOST
at any IP or hostname, appending the auth port if yours is remapped
(WOW_HOST=play.example.com:5000). Credentials go in at the login screen, or set WOW_USER /
WOW_PASS to skip it.
Early inspiration and file format guidance came from the wowemulation-dev community, and warcraft-rs in particular.
benilla is an independent fan project, not affiliated with or endorsed by Blizzard Entertainment.
It ships no Blizzard content — no art, models, sounds, maps, MPQ contents or FrameXML; you
provide your own legally obtained 1.12.1 client. The interface code under
crates/benilla-app/assets/ui/ is ours, written to the client's own layout and API names so that
the windows look right and 1.12.1 addons find the names they expect.
World of Warcraft is a trademark of Blizzard Entertainment, Inc. Our own code is licensed under MIT or Apache 2.0, at your option.