This reverses the design of the previous commit. `PropertyDef.scope` is gone without replacement: a behavior variable is an object property again, without exception, and sharing is something you point at rather than something you declare twice. A **Variables asset** is declarations and nothing else -- no graph, no position, never placed, no tab of its own (`TAB_OF_ASSET` is already `Partial<>`, so that costs no line). A `Variables` node names one through its new `variablesAsset` setting, empty meaning the behavior's own variables as before, and then reads and writes one value per key for the whole run. Its property list follows the chosen source, which was the actual request: a value another graph declared is now offerable, where before every participant had to declare the name itself. That deletes more than it adds (-72 lines net): `globalConflicts` and its run-stopping kind clash, `SetVariableScopeCommand`, the scope picker, both object-inspector filters and the "shared by the whole run" note on the placed object. A typo is no longer a silent second variable -- naming an asset is picking from a list. And two Variables assets may carry the same key without meeting, because the asset is the key, not the name. The one shape it copies is the one that already existed: `Set state` picks its machine the same way. Lifetime is unchanged. The bag is built at `BehaviorSystem.start()` from the declarations and never written back, so playing in the editor cannot change the project -- which is the whole reason a counter must not be an object property (`World.syncToModel` would `commit()` it, and the coin counter would stand at 7 for good). Full symmetry across that gap, without mirroring anything. Two named wires: `Inspector.liveVariables` shows the values as they stand while a run is on and falls back to the declarations when it ends, and `adoptDeclarations()` takes a key into the run *only where the document changed it since the last sync*. Without that condition any unrelated project edit would snap a running counter back to its starting value; a counter-test bends exactly that and falls over. Nothing was ever cached, incidentally: `GraphInterpreter` only pulse-caches nodes without a `read`, and the variable node has one. The wire was missing. The state machine `Scope` row is now an ordinary `enum` row through `createFieldRow`. It was hand-built from an `HStack` with a ghost dropdown and began ~34px left of every value above it; the explanations beside `Local` and `Global` are gone from the menu, the sentence below the row keeps saying it. Machine scope is otherwise untouched -- `StateMachineAsset.scope`, `SetMachineScopeCommand`, `stateBag()` and its persistence all stand, so #59 stays closed as built and `Scope` as a type now carries machines alone. Six counter-proofs, each biting at its own guard. One of them did not bite at first: the suggestion list was computed twice, in `nodeSection` and `portSection`, so only the browser test covered the request itself. It is one named function now, `variableChoices`, with a unit test of its own. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Game Maker
A browser-based tool "one step before a game engine": create assets (scenes, cameras, sprites), place them into scenes, tweak their properties in an inspector and press Play – all in one program, all drawn inside a single WebGL canvas.
Live: https://nockal.com/game-maker/ · Widget playground: https://nockal.com/game-maker/?playground
The documentation is the wiki: https://git.nockal.com/meleki/game-maker/wiki – every concept, node, tab and shortcut, plus the architecture and the development workflow. This file is the short way in.
In one screen
- An asset is a named, typed thing (scene, camera, sprite, text, behavior, collider, container, texture, animation, state machine) with properties and no position.
- A scene object places an asset: position, sparse overrides of its properties, an optional parent. Only what differs from the asset is stored; the inspector paints it gold and offers ↺ / ↑.
- A container is a reusable group edited once and placed many times; its content is resolved from the template on every read. A screen is a container switched on and off.
- A behavior is logic as a node graph, placed like anything else and parented to the object it acts on. Play has no built-in behaviour – everything that happens is a graph.
- Play runs a throwaway copy of the project; every panel stays usable and Stop brings back exactly what was saved.
Quick start
Node 22 is required.
npm install
npm run dev # http://localhost:5175/game-maker/dist/ – API calls are proxied to production
npm run check # typecheck + lint + format:check + unit tests – the gate CI runs too
npm run build # writes dist/ and regenerates index.html; the folder is what nginx serves
The browser suite and the three example games need a machine with a GPU:
node tools/seed-e2e.mjs && node tools/e2e.mjs # the editor, 862 checks (GM_STEPS=20 for one step)
node tools/seed-jumprun.mjs && node tools/smoke-jumprun.mjs
node tools/seed-tetris.mjs && node tools/smoke-tetris.mjs
node tools/seed-actor.mjs && node tools/smoke-actor.mjs
Every push runs all of it on the Gitea runner, so locally take the gate plus the step your change touches and leave the full run to CI. Details, the GPU requirement and the detached runner are in Development.
Documentation
| Page | What it covers |
|---|---|
| Concepts | Assets, scene objects, overrides, play mode, the camera, the console |
| Scene editing | Placing, z-order, hierarchy, the editor offset |
| Behaviors | Node graphs: variables, the node set, structs and lists, loops, nesting, editing |
| Colliders | Collision events and blocking movement |
| Textures | Images, frames, the filter, upload limits |
| Animations | Animation assets and the Animation tab |
| State machines | The asset, named transitions, State branch, Set state and State transition |
| Containers | Templates, instances, screens |
| Keyboard | Every shortcut |
| Architecture | Stack, source layout, the rules that keep it organised |
| Development | Commands, the e2e suite, the example games, CI |
| API | The PHP JSON API and the project document |
Ideas, gaps and bugs
They live in the issue tracker: https://git.nockal.com/meleki/game-maker/issues. What is not there yet is listed on the wiki's Home page.