Sailboat

Note: Size: the hull is 6.2 m long from transom to stem head and 2.3 m in beam. The sheer is 1.67 m above the keel bottom amidships, the cabin roof 2.24 m, and the burgee tip 9.34 m (mast 7.2 m above deck). The fin keel draws 0.72 m below the hull, and the rudder hangs 0.38 m aft of the transom. Origin: x is centred, y = 0 is the bottom of the keel, and z is centred on the hull length. The bow faces +Z. The boat stands on its keel, so set it on your own water surface (a waterline about 1.0 m up suits it); no water is included. The GLB has 1,980 triangles in 23 meshes, merged per part and colour. It holds one baked 6 s clip, 'scene-motion', and the hull, keel, deck, cabin, mast and rigging never move in it. The boom (carrying the mainsail as a child) swivels about the mast axis at the gooseneck. The jib swivels about its forestay; its node is rotated so local +Y runs up the stay. The rudder and tiller swing about the vertical pintle axis just aft of the transom. The burgee weathervanes on a vertical spindle at the masthead. All angles are whole-cycle sines, so the loop closes exactly, and the sails stay to the +X (leeward) side throughout, clear of the backstay and shrouds. The exporter writes the static node pose at the t = 2 s frame, so un-animated imports show the sails slightly eased from frame 0. Every material is named exactly after a kit palette colour. The exporter writes one material per mesh, so a colour name repeats across materials: recolour by name. Params are baked into the GLB at their defaults and only change geometry when the scene is rebuilt in the viewer. islandSize (the kit's 'Island size') scales the whole boat except the mast height, from a 5.2 m sloop at 0 to a 7.2 m sloop at 1. mastHeight sets the rig height. trim sets how far the boom and jib are eased out, and swing sets the breeze amplitude of the baked loop (0 holds the sails still). Only the default params were captured by three-check; the param extremes were reasoned through in code but not rendered. Fix rounds: (1) the sails swung away from the hero camera and read edge-on, the coral bottom hid under the hull, and a pale deck merged with the white hull, so the sails now ease toward +X, the coral runs up to the boot stripe, the deck is sand and the rudder is slimmer. (2) The back view was loosened so the keel foot clears the toolbar. glb-lint: 0 errors and 5 heuristic warnings. Two cover the material count and duplicate materials, both caused by the per-mesh materials. One flags overlaps where the hull bands, toe rails, keel root and cabin are deliberately nested. One flags the mast, boom and jib as 'detached', but they sit on the cabin roof and in the rig, which are separate parts. One flags the 9.3 m height against a 1 m reference, which is the real scale of a sailboat. The verdict reads UNVERIFIED only because no host requirements contract was supplied. plan-check passes except for its part-id regex, which rejects the hyphens in the slug-based ids this library requires (a de-hyphenated copy passes). three-check accepts those ids, and all 12 survive the GLB reload.