> ## Documentation Index
> Fetch the complete documentation index at: https://dadd.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# TendonRenderer

> Render MuJoCo tendons as tubes

Renders MuJoCo tendons as smooth tube geometry. Useful for visualizing tendon-driven systems (e.g., robotic hands).

## Usage

```tsx theme={null}
<MujocoCanvas config={config}>
  <TendonRenderer />
</MujocoCanvas>
```

## Props

`TendonRenderer` takes no props. Tendons are rendered with default styling.

## How It Works

1. On model load, creates one `Mesh` per tendon with a shared `MeshStandardMaterial` and initial `TubeGeometry`
2. Each frame, updates the `CatmullRomCurve3` control points from `data.wrap_xpos`
3. Rebuilds only the `TubeGeometry` from the updated curve — the material and mesh objects are reused
4. Tendons with fewer than 2 valid wrap points are hidden automatically

## Defaults

| Property        | Value                |
| --------------- | -------------------- |
| Color           | `rgb(0.3, 0.3, 0.8)` |
| Tube radius     | `0.002`              |
| Radial segments | `6`                  |

## Notes

* Requires tendons defined in the MJCF model
* `ten_rgba` and `ten_width` may not be available in the active MuJoCo WASM binding — defaults are used instead
* If the model has no tendons, this component renders nothing
* Meshes and material are created once and reused — only geometry is rebuilt per frame