---
title: SCNParticleEvent.birth
framework: scenekit
role: symbol
role_heading: Case
path: scenekit/scnparticleevent/birth
---

# SCNParticleEvent.birth

Occurs when new particles spawn.

## Declaration

```swift
case birth
```

## Discussion

Discussion Use a handler for this event to override the initial properties of each particle.

## See Also

### Constants

- [SCNParticleEvent.death](scenekit/scnparticleevent/death.md)
- [SCNParticleEvent.collision](scenekit/scnparticleevent/collision.md)