Dump truck

Note: Size: a rigid-frame quarry haul truck of about 60 t, 10.08 m long from the dump body's tail lip to the front stair handrail (9.7 m to the front bumper), 5.4 m wide across the rear duals (5.9 m across the mirrors) and 4.76 m tall to the beacon (canopy top 4.45 m). The tyres are 2.4 m across, on a 4.4 m wheelbase with dual tyres at the rear. The origin is at the bottom centre, the tyres rest on y = 0 (a lug face, not a corner, touches the ground), and the front (grille) faces +Z. The footprint centre sits 0.24 m ahead of the origin because the front stair overhangs the bumper. The GLB has 4,624 triangles in 59 meshes, merged per part and per colour. Every material is named exactly after a kit palette colour; 9 of the 12 are used (ochre, ochre dark and dark wood only appear through oreColour or not at all). The exporter writes one material per mesh, so the same colour name appears on several materials: recolour by name. The baked clip scene-motion (8 s, seamless) moves only parts on their own pivots. The dump body tips about its rear hinge pin axis up to tipAngle and back down. Each hoist barrel swivels on its frame foot pin, and its stage and rod each slide out half the extension, so the rod eye stays on the body's clevis pin. The ore load slides toward the tail and shrinks away (pours) while the body is up. It is hidden inside the floor slab while the body lowers, then grows back up from the floor at rest. The load and the hoist stages use translate/scale tracks. The beacon makes 4 turns. The frame, cab, deck and wheels never move; the wheels are separate parts pivoted on their axle centres so you can roll them yourself. The GLB's static node pose is the t = 2 s frame, which is the loaded rest pose. Params are baked into the GLB at their defaults and only change the model when the scene is rebuilt in the viewer. oreColour (the kit's 'Ore colour') steps through the kit's ore ladder: slate light, ochre light, rust (default, iron), ochre, machine yellow. tipAngle sets how far the body tips in the loop (25–50°). loadLevel scales the heap height. Only the default params were rendered and checked; the extremes were not captured. glb-lint: 0 errors and 6 heuristic warnings (per-mesh duplicate materials counted against the direction's 10-material default, non-indexed flat-shaded geometry, deliberately nested pins and brackets, parts flagged 'detached' because each sits in its own group, and height against a generic 1 m reference). 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; with the ids substituted it passes. three-check accepts the real ids, and all 25 survive the GLB reload.