> ## 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.

# ContactMarkers

> Visualize MuJoCo contact points

Renders contact points as small spheres using `InstancedMesh` for performance. Useful for debugging contact behavior.

## Usage

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

### Customized

```tsx theme={null}
<ContactMarkers
  maxContacts={50}
  radius={0.01}
  color="#ff4444"
  visible={showContacts}
/>
```

## Props

<ParamField body="maxContacts" type="number" default="100">
  Maximum number of contact points to render. Limits are important to avoid WASM out-of-memory when reading contact data.
</ParamField>

<ParamField body="radius" type="number" default="0.005">
  Sphere radius for each contact marker.
</ParamField>

<ParamField body="color" type="string" default="#4f46e5">
  Color of the contact markers.
</ParamField>

<ParamField body="visible" type="boolean" default="true">
  Toggle visibility. Useful for a debug panel toggle.
</ParamField>

## Notes

* Contact data is read from `data.contact` every frame
* Access is wrapped in try/catch since contact reads can fail if `ncon` is large
* The component always checks `data.ncon` before iterating contacts
* Uses `InstancedMesh` for efficient rendering of many small spheres