# Sandbox.Animation.GraphBuilder.Spring

```csharp
Node Spring(Node input, SpringSettings settings = null)
```

Smoothly track `input` with a damped spring - useful for
damping noisy inputs like velocity before they drive a blend space.

### Parameters

- `input` (`Node`)
- `settings` (`SpringSettings`), default `null`

### Returns

`Node`

Declared in [Sandbox.Animation.GraphBuilder](/api/Sandbox.Animation.GraphBuilder).
Assembly: `Sandbox.Engine`.