rootandClaude Opus 5
78baf0c719
Behavior and Container draw an icon because isSymbolType() is true for them, but that predicate does not mean "draws an icon" — it means "is editor decoration". Four places read it that way: collectWorldItems, GameViewport. collectFrame and syncDrawOrder all drop symbols out of the running world and the game picture, and placementOf() gives them an upright unscaled box. Listing 'particles' there would have handed the source an icon and taken away its particles, in the scene view as well as in the game. So the two questions are two functions now. hasSceneIcon() says a type draws an icon; isSymbolType() keeps meaning decoration. The icon itself is a SceneViewport decoration, which is editor-only for free because GameViewport never syncs decorations. A ring (r 10, #c26a1f) with four sparks, upright and unscaled like the other symbols, its middle left open — unlike Behavior and Container a source draws something of its own, and the field is densest exactly there. The name sits beside it and a dashed line runs to the parent, same colour. Found while writing the tests: the source's grab box scaled with its transform while the icon did not, so the two came apart. placementOf() returns only the translation for 'particles', making the box the upright 24 x 24 that covers its icon. The source's own transform still feeds every particle untouched. 824 checks (821 + 3). Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
4.1 KiB
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, 824 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, State branch and Set state |
| 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.