---
title: SCNParticleBirthDirection
framework: scenekit
role: symbol
role_heading: Enumeration
path: scenekit/scnparticlebirthdirection
---

# SCNParticleBirthDirection

Options for the initial direction of each emitted particle, used by the birthDirection property.

## Declaration

```swift
enum SCNParticleBirthDirection
```

## Topics

### Constants

- [SCNParticleBirthDirection.constant](scenekit/scnparticlebirthdirection/constant.md)
- [SCNParticleBirthDirection.surfaceNormal](scenekit/scnparticlebirthdirection/surfacenormal.md)
- [SCNParticleBirthDirection.random](scenekit/scnparticlebirthdirection/random.md)

### Initializers

- [init(rawValue:)](scenekit/scnparticlebirthdirection/init(rawvalue:).md)

## Relationships

### Conforms To

- [BitwiseCopyable](swift/bitwisecopyable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [RawRepresentable](swift/rawrepresentable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Managing Particle Emission Locations

- [emitterShape](scenekit/scnparticlesystem/emittershape.md)
- [birthLocation](scenekit/scnparticlesystem/birthlocation.md)
- [SCNParticleBirthLocation](scenekit/scnparticlebirthlocation.md)
- [birthDirection](scenekit/scnparticlesystem/birthdirection.md)
- [emittingDirection](scenekit/scnparticlesystem/emittingdirection.md)
- [spreadingAngle](scenekit/scnparticlesystem/spreadingangle.md)