# Roller Test Bed (Car Factory Production Line)

Free 3D model of a rolling road test bed with four turning rollers, an end of line brake and speedometer test rig for a car factory game asset kit.

- **URL:** https://3dassets.dev/assets/car-factory-production-line-roller-test-bed-234347cb
- **GLB (direct, CORS *, immutable):** https://cdn.3dassets.dev/assets/27838/v1/model.glb
- **Download (counted):** https://3dassets.dev/download/car-factory-production-line-roller-test-bed-234347cb
- **Licence:** CC0 1.0 Universal: https://creativecommons.org/publicdomain/zero/1.0/ (no attribution required)
- **Contributor:** 3D Assets (@3dassets): https://3dassets.dev/u/3dassets
- **Category:** Roads & Infrastructure
- **Tags:** Modern, Stylized, Interior, Kit / Set, Animated
- **Geometry:** 1,408 triangles, 1,354 vertices, 7 meshes, 5 materials, 0 textures
- **Size (m):** 5.25 × 2.9 × 3.898
- **Animations:** spin
- **File size:** 0.03 MB
- **Downloads:** 0
- **AI used (contributor-reported):** yes; model: Claude Fable 5.1

## About

Free 3D model of a rolling road test bed with four turning rollers, an end of line brake and speedometer test rig for a car factory game asset kit. Dimensions 5.25 by 2.90 by 3.90 m (X by Y by Z). Metre units, +Y up, +Z front, origin on the footprint at ground level. Animated pivot nodes: roller-l1 at (-1.35, 0.44, -0.33) m; roller-l2 at (-1.35, 0.44, 0.33) m; roller-r1 at (1.35, 0.44, -0.33) m; roller-r2 at (1.35, 0.44, 0.33) m. A 5.00 by 3.40 m sunken roller bed with two pairs of 0.56 m rollers set 2.70 m apart, a blue operator console with a lit screen and an overhead display mast. The four rollers turn on the spin clip; the bed, the console and the mast are fixed geometry. Drive a finished car on with its wheels on the roller pairs. Car plant palette: light grey epoxy floor, safety yellow, white plant steel, charcoal, safety orange, equipment blue, two gloss body colours, matt primer, skin, glass and emissive amber. Standard PBR materials with embedded procedural maps. Rigid node-transform clips: spin. No skinning. No collision or navigation data.

## Use with three.js

```js
import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'
import { AnimationMixer } from 'three'

let mixer

const loader = new GLTFLoader()
loader.load('https://cdn.3dassets.dev/assets/27838/v1/model.glb', (gltf) => {
  scene.add(gltf.scene)
  mixer = new AnimationMixer(gltf.scene)
  mixer.clipAction(gltf.animations[0]).play()
})

// Call from your render loop; deltaSeconds is time since the previous frame.
function updateAssetAnimation(deltaSeconds) {
  mixer?.update(deltaSeconds)
}
```

## React Three Fiber

```jsx
import { useGLTF, useAnimations } from '@react-three/drei'
import { useEffect } from 'react'

export function RollerTestBedCarFactoryProductionLine(props) {
  const { scene, animations } = useGLTF('https://cdn.3dassets.dev/assets/27838/v1/model.glb')
  const { actions, names } = useAnimations(animations, scene)
  useEffect(() => {
    const action = actions[names[0]]
    action?.reset().play()
    return () => { action?.stop() }
  }, [actions, names])
  return <primitive object={scene} {...props} />
}
useGLTF.preload('https://cdn.3dassets.dev/assets/27838/v1/model.glb')
```

## <model-viewer>

```html
<model-viewer src="https://cdn.3dassets.dev/assets/27838/v1/model.glb" alt="Roller Test Bed (Car Factory Production Line)" camera-controls auto-rotate autoplay></model-viewer>
```

## Blender

```python
# Blender 4.x: File > Import > glTF 2.0, or from the Python console after downloading the file.
import bpy
bpy.ops.import_scene.gltf(filepath='model.glb')  # from https://cdn.3dassets.dev/assets/27838/v1/model.glb
# Metres and +Y up are converted to Blender's Z-up scene automatically.
# Clips arrive as actions; play them from the Dope Sheet > Action Editor.
```

## Godot

```gdscript
# Godot 4: copy model.glb into res://models/ and the editor imports it as a scene.
var packed := load("res://models/model.glb") as PackedScene
var model := packed.instantiate()
add_child(model)
var player := model.find_child("AnimationPlayer", true, false) as AnimationPlayer
player.play(player.get_animation_list()[0])
```

## Unity

```csharp
// Unity: import model.glb with glTFast (Package Manager: com.unity.cloud.gltfast) and drag the prefab in,
// or load it at runtime straight from the CDN:
using GLTFast;
var gltf = new GltfImport();
if (await gltf.Load("https://cdn.3dassets.dev/assets/27838/v1/model.glb")) await gltf.InstantiateMainSceneAsync(transform);
// Clips import as legacy AnimationClips on the root; GetComponent<Animation>().Play() starts the first.
```

---
JSON: https://3dassets.dev/api/v1/assets/car-factory-production-line-roller-test-bed-234347cb · Loads with a plain GLTFLoader: no Draco/KTX2 loaders needed.