Motion Bricks

{
  "type": "motion_bricks"
}

{
  "identifier": "urn:air:a2uicatalog.ai:atom:motion_bricks",
  "displayName": "Motion Bricks",
  "type": "application/vnd.a2ui.atom+json",
  "url": "https://a2uicatalog.ai/atoms/motion_bricks/",
  "capabilities": [
    "web",
    "google-meet-stage",
    "google-apps-script-web",
    "mcp-apps",
    "android"
  ],
  "description": "A toy-brick sculpture on the film clock: procedural boxes with real brick proportions, studs, shadows and instruction-style edges (the brick_build_3d engine, here with boxes only; real LDraw parts are brick_build_3d's partsModel), drawn on a transparent stage so it sits inside a film. Bricks drop into place in build order as p goes 0 to 1 (p 1 = every brick settled) and the model turns with the second dial (--s, turns per unit), so a step track spins it and seeking shows exactly that frame. Give text to set a word in bricks (each character of a 5x7 dot font, every row merged into 1x1 to 1x4 bricks, depth studs deep), bricks for an explicit model, or a named shape. The optional motion object sets how the bricks arrive: the order they launch in, where they fly in from, how long each flight lasts, how much they tumble, and a small overshoot and recoil as they seat; all of it is numbers and fixed names that are clamped, and a stud-cell pass keeps a brick from launching before the brick it rests on. Standalone it shows the finished model. The engine is fixed code and the config is numbers, colours and the brick list, so nothing in the payload becomes code; without WebGL the engine draws with a 2D canvas painter instead. Known limit: each brick canvas holds two WebGL contexts and a page allows about 16, so keep to about 7 brick canvases per page. Not affiliated with or endorsed by the LEGO Group. LEGO is a trademark of the LEGO Group.",
  "representativeQueries": [
    "show a toy-brick sculpture or brick lettering that builds, flies in and turns on the film clock",
    "a toy-brick sculpture on the film clock: procedural boxes with real brick proportions, studs, shadow",
    "render a motion bricks"
  ]
}