# Sandbox.PhysicsBodyBuilder.AddBox

```csharp
PhysicsBodyBuilder AddBox(Vector3 extents, System.Nullable<Transform> transform = null)
```

### Parameters

- `extents` (`Vector3`)
- `transform` (`System.Nullable<Transform>`), default `null`

### Returns

`PhysicsBodyBuilder`

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