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Catapult

A flat-shaded dark-wood siege catapult with twin skids, braced uprights, a gold-ringed winch drum spliced to a draw rope, and the court's blue banner with gold-and-crimson crest. The cocked arm fires into the crossbar, bounces, and the winch winds it back down in a seamless five-second loop.

Original GLB153 KB Poster

Left rail: colours and the 4 knobs the agent wrote into this model — they rebuild the geometry and go into your download. Right rail: looks for the viewer. Drag to orbit, scroll to zoom.

Triangles: 1,160
Vertices: 2,204
Meshes · materials: 53 · 6
Size (W × H × D): 1.2 m × 1.5 m × 2.1 m
File: GLB · 153 KB
Animation: scene-motion · 5.0s
Style: Low-poly
Collection: Royal Castle Court

Palette · named materials

dark wood#3d2a1c
gold#d0a225
royal blue#2e67b8
crimson#a51d34
mid grey#7d828c
warm white#f2ede2

Use it

import { GLTFLoader } from "three/addons/loaders/GLTFLoader.js";

const gltf = await new GLTFLoader().loadAsync(
  "https://assets.stoicsoft.com/1designtool/3d/models/royal-castle-court-catapult/a8b0f4ea3a/model.glb"
);
scene.add(gltf.scene); // metres, +Y up, front faces +Z

const mixer = new THREE.AnimationMixer(gltf.scene);
gltf.animations.forEach((clip) => mixer.clipAction(clip).play());
// in your loop: mixer.update(delta)

How it was made

The brief given to 1DesignTool's “3D object” template:

Catapult for the Royal Castle Court kit. Design it as one clear asset at believable real-world scale for that setting (state the size in metres in meta.notes), with its main parts modelled and named, readable at thumbnail size and from every orbit angle. It moves: author a seamless baked loop (2–12 s) with every pivot exactly at its hinge, axle or swivel, and keep the base still. This is one part of the Royal Castle Court kit (Low-poly style, flat-lowpoly direction): A bright castle for ceremonies and intrigue. Use ONLY the kit palette, by name: stone white #f4f1ec, royal blue #2e67b8, gold #d0a225, crimson #a51d34, stone white dark #d7cebc, royal blue dark #1f457a, stone white light #f9f8f6, royal blue light #6190d1, soot black #1b1b22, warm white #f2ede2, mid grey #7d828c, dark wood #3d2a1c. Every material's `name` must be exactly the palette colour it uses — the GLB carries these names so the kit recolours as one; an unnamed material fails delivery. Kit knob: expose a param `bannerCrestAndColours` (0–1, default 0.5) for the kit's "Banner crest and colours" setting wherever it makes sense on this part, and keep that id. Material names are the palette colour NAMES listed above (e.g. "leaf green", "dark wood") — never a hex code like "#3d2a1c". meta.json must be valid JSON.

Agent: OpenCode · mimo-v2.6-flash-free in 1DesignTool
Direction: Low-poly · family abstract-kinetic
three-check PASS — 22 checks, 0 failed, 48 captures (1280x800 + 390x844; seek-deterministic, offline, GLB reload preserves all 8 plan part ids) · glb-lint PASS (0 errors, 1 sibling-overlap warning for intended arm/bucket nesting; tool verdict UNVERIFIED because no requirements contract was supplied)

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Named parts · 8

Catapult
Chassis
Throwing arm
Winch drum
Draw rope
Banner
Mast
Ballast stones

Note: Size is approximately 1.16 × 1.49 × 2.10 m in metres; the GLB is baked at the default parameters and carries the clip scene-motion (5 s, seamless: hold cocked, fire up into the crossbar, bounce, winch winds back down). All six flat-shaded materials are named by their Royal Castle Court palette colour, so the kit recolours the whole catapult from one material map; metalness stays 0 and every mesh is flat-shaded. Part ids use the catapult.* namespace (hyphens are not valid in plan part ids). The single lint warning is the arm's intended nesting — arm-shaft, arm-hub and bucket parts share one bounding box by construction. Lint's five unverified rules come from having no requirements contract, not from a violation.