# BBox.Trace

```csharp
bool Trace(in Ray ray, float distance, out float hitDistance)
```

Trace a ray against this box. If hit then return the distance.

### Parameters

- `in ray` (`Ray`)
- `distance` (`float`)
- `out hitDistance` (`float`)

### Returns

`bool`

Declared in [BBox](/api/BBox).
Assembly: `Sandbox.System`.