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# particleAngle

The rotation angle, in degrees, of newly spawned particles. Animatable.

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

## Discussion

A particle’s angle (or orientation) is independent from its direction of motion. For example, a smoke effect may use a small image of a cloud for each particle, which stays at the same angle as the smoke rises, but a snow effect may use an image that flips and rotates as each snowflake falls. The [`orientationMode`](/documentation/SceneKit/SCNParticleSystem/orientationMode) property determines whether and how particles are allowed to rotate, and the [`particleAngle`](/documentation/SceneKit/SCNParticleSystem/particleAngle) and [`particleAngularVelocity`](/documentation/SceneKit/SCNParticleSystem/particleAngularVelocity) properties determine rotation angles and rates. You can randomize the rotations of newly spawned particles with the [`particleAngleVariation`](/documentation/SceneKit/SCNParticleSystem/particleAngleVariation) property.

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

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

---

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