---
title: emissionLongitude
framework: quartzcore
role: symbol
role_heading: Instance Property
path: quartzcore/caemittercell/emissionlongitude
---

# emissionLongitude

The longitudinal orientation of the emission angle. Animatable.

## Declaration

```swift
var emissionLongitude: CGFloat { get set }
```

## Discussion

Discussion The emission longitude is the orientation of the emission angle in the xy-plane. it is also often referred to as the azimuth. The default value of this property is 0.0.

## See Also

### Setting Emitter Cell Motion Attributes

- [spin](quartzcore/caemittercell/spin.md)
- [spinRange](quartzcore/caemittercell/spinrange.md)
- [emissionLatitude](quartzcore/caemittercell/emissionlatitude.md)
- [emissionRange](quartzcore/caemittercell/emissionrange.md)