---
title: circle
framework: quartzcore
role: symbol
role_heading: Type Property
path: quartzcore/caemitterlayeremittershape/circle
---

# circle

Particles are emitted from a circle centered at (emitterPosition.x, emitterPosition.y, emitterZPosition) of radius emitterSize.width.

## Declaration

```swift
static let circle: CAEmitterLayerEmitterShape
```

## See Also

### Constants

- [point](quartzcore/caemitterlayeremittershape/point.md)
- [line](quartzcore/caemitterlayeremittershape/line.md)
- [rectangle](quartzcore/caemitterlayeremittershape/rectangle.md)
- [cuboid](quartzcore/caemitterlayeremittershape/cuboid.md)
- [sphere](quartzcore/caemitterlayeremittershape/sphere.md)