---
title: "init(transitionIn:transitionOut:)"
framework: realitykit
role: symbol
role_heading: Initializer
path: "realitykit/billboardaction/init(transitionin:transitionout:)"
---

# init(transitionIn:transitionOut:)

Creates a new billboard action.

## Declaration

```swift
init(transitionIn: BillboardAction.Transition = .init(), transitionOut: BillboardAction.Transition = .init())
```

## Parameters

- `transitionIn`: The rate of change at the beginning of the action.
- `transitionOut`: The rate of change at the end of the action.