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# SCNActionTimingMode

Constants affecting the animation curve of an action, used by the [`timingMode`](/documentation/SceneKit/SCNAction/timingMode) property.

```
enum SCNActionTimingMode
```

## Topics

### Constants

[`SCNActionTimingModeLinear`](/documentation/SceneKit/SCNActionTimingMode/linear)

Linear pacing. The animation progresses evenly throughout its duration.

[`SCNActionTimingModeEaseIn`](/documentation/SceneKit/SCNActionTimingMode/easeIn)

Ease-in pacing. The animation begins slowly, and then speeds up as it progresses.

[`SCNActionTimingModeEaseOut`](/documentation/SceneKit/SCNActionTimingMode/easeOut)

Ease-out pacing. The animation begins quickly, and then slows as it completes.

[`SCNActionTimingModeEaseInEaseOut`](/documentation/SceneKit/SCNActionTimingMode/easeInEaseOut)

Ease-in ease-out pacing. The animation begins slowly, accelerates through the middle of its duration, and then slows again before completing.

## Relationships

### Conforms To

[`BitwiseCopyable`](/documentation/Swift/BitwiseCopyable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Hashable`](/documentation/Swift/Hashable)

[`Sendable`](/documentation/Swift/Sendable)

[`Equatable`](/documentation/Swift/Equatable)

[`RawRepresentable`](/documentation/Swift/RawRepresentable)

---

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