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# SCNParticleEvent

Significant events in the life spans of simulate particles, used by the [`handle(_:forProperties:handler:)`](/documentation/SceneKit/SCNParticleSystem/handle(_:forProperties:handler:)) method.

```
enum SCNParticleEvent
```

## Topics

### Constants

[`SCNParticleEventBirth`](/documentation/SceneKit/SCNParticleEvent/birth)

Occurs when new particles spawn.

[`SCNParticleEventDeath`](/documentation/SceneKit/SCNParticleEvent/death)

Occurs when particles reach the end of their life span.

[`SCNParticleEventCollision`](/documentation/SceneKit/SCNParticleEvent/collision)

Occurs when particles collide with scene geometry.

## Relationships

### Conforms To

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

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

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

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

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

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

---

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