---
title: playUsingSceneTimeBase
framework: scenekit
role: symbol
role_heading: Type Property
path: scenekit/scnscenesource/animationimportpolicy/playusingscenetimebase
---

# playUsingSceneTimeBase

Animations loaded from the scene file are immediately added to the scene and played according to the scene’s sceneTime property.

## Declaration

```swift
static let playUsingSceneTimeBase: SCNSceneSource.AnimationImportPolicy
```

## Discussion

Discussion Using this policy is equivalent to manually loading each animation, setting its usesSceneTimeBase property to true, and adding it to the appropriate element of the scene. Use this policy when you want to directly control (or let the user directly control) the progress of animations.

## See Also

### Type Properties

- [doNotPlay](scenekit/scnscenesource/animationimportpolicy/donotplay.md)
- [play](scenekit/scnscenesource/animationimportpolicy/play.md)
- [playRepeatedly](scenekit/scnscenesource/animationimportpolicy/playrepeatedly.md)