Excavator
A tracked hydraulic excavator (about 9.5 m long at standard size) with the arm toward +Z. The house turns about y on the tracks, and boom, stick and bucket are rotate rigs about x at their real pins; userData.tick plays one full dig cycle per loop (dig, lift, swing, dump, swing back) with the hydraulic rams following. Tracks are static. Work lights glow at night.
- Size
- 3.1 × 5.9 × 8.6 m
- Triangles
- 2,068
- Kit
- Machines
Tune it
4 knobs: Paint, Tool, Size, Dozer blade.
Specs
- Size
- 3.1 × 5.9 × 8.6 m width × height × depth
- Triangles
- 2,068 of 6,000
- Draw calls
- 1 one vertex-colour material
- Loop clip
- 6.283 m of travel per cycle
- Moving parts
- 12 house · spin, boom · rotate, stick · rotate, bucket · rotate, boom_ram_L · rotate, boom_ram_L_rod · rotate, boom_ram_R · rotate, boom_ram_R_rod · rotate, stick_ram · rotate, stick_ram_rod · rotate, bucket_ram · rotate, bucket_ram_rod · rotate
- Knobs
- 4 3 presets
- Night lights
- 2 worklight, cab_window
Passed the validator: real scale, rests on y = 0, front faces +Z, deterministic.
Use it
Code for the specimen as it is set up above; it follows your knobs.
import { createAsset } from 'https://gaitkit.com/cdn/excavator.mjs';
const excavator = createAsset();
scene.add(excavator); // rests on y = 0, front faces +Z
// 'boom' pivots on its hinge: -30° to 2° around x
excavator.getObjectByName('boom').rotation.x = THREE.MathUtils.degToRad(-30);import { useMemo } from 'react';
import { createAsset } from 'https://gaitkit.com/cdn/excavator.mjs';
export function Excavator() {
const model = useMemo(() => createAsset(), []);
return <primitive object={model} />;
}# Import excavator.glb (download below). Moving parts are separate nodes, pivoted on their hinge.
$Excavator/boom.rotation_degrees.x = -30// Import excavator.glb with glTFast (com.unity.cloud.gltfast).
transform.Find("boom").localEulerAngles = new Vector3(/* x: */ -30, 0, 0);Use the gaitkit MCP server: get_variant({ "id": "excavator", "want": "default look" })
then place the result.
# MCP endpoint
https://gaitkit.com/mcpKnobs
| Knob | Type | Values | Default | What it does |
|---|---|---|---|---|
paint | choice | yellow orange green grey | yellow | Body and arm paint: yellow (classic), orange, green or grey (rental fleet). |
bucket | choice | digging ditching breaker | digging | digging (toothed general bucket), ditching (wide smooth-lipped grading bucket) or breaker (hydraulic hammer with a chisel for concrete and rock). |
size | choice | mini standard large | standard | mini (about 5 m long, open canopy instead of a cab), standard (20-tonne class, 9.5 m) or large (about 12 m, quarry machine). |
blade | toggle | on / off | false | Push blade on the front of the tracks for backfilling, as on most mini and wheeled-size machines. |
Presets: mini digger {"size":"mini","blade":true,"paint":"orange"} · demolition {"bucket":"breaker","paint":"grey"} · quarry machine {"size":"large","paint":"yellow"}
Files
| File | What |
|---|---|
| excavator.glb | GLB, default look · 273 KB |
| excavator.mjs | ES module, every knob live |
| excavator.obj | OBJ, static, no colour |
| excavator-params.json | knob schema, presets, night zones |
Licence
Use it in games, apps, renders and client work, commercially and without credit. Do not resell it as an asset or train a 3D generator on it. The full licence.