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# particleAngleVariation

The range, in degrees of randomized initial particle angles. Animatable.

```
var particleAngleVariation: CGFloat { get set }
```

## Discussion

Setting a nonzero value for this property randomizes the effect of the [`particleAngle`](/documentation/SceneKit/SCNParticleSystem/particleAngle) property. SceneKit randomly adjusts the initial angle of each particle by up to half the [`particleAngleVariation`](/documentation/SceneKit/SCNParticleSystem/particleAngleVariation) value. For example, if the [`particleAngle`](/documentation/SceneKit/SCNParticleSystem/particleAngle) value is `90.0` degrees and the [`particleAngleVariation`](/documentation/SceneKit/SCNParticleSystem/particleAngleVariation) value is `30.0` degrees, newly spawned particles are randomly rotated to an angle between 75° and 105°.

The default value is `0.0` degrees, specifying no randomization.

You can animate changes to this property’s value. See [Animating SceneKit Content](/documentation/SceneKit/animating-scenekit-content).

---

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