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

# line

Particles are emitted along a line from (emitterPosition.x - emitterSize.width/2, emitterPosition.y, emitterZPosition) to (emitterPosition.x + emitterSize.width/2, emitterPosition.y, emitterZPosition).

## Declaration

```swift
static let line: CAEmitterLayerEmitterShape
```

## See Also

### Constants

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