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# CAEmitterLayerEmitterShape

```
struct CAEmitterLayerEmitterShape
```

## Topics

### Initializers

[`init(rawValue:)`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/init(rawValue:))

### Type Properties

[`circle`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/circle)

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

[`cuboid`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/cuboid)

Particles are emitted from a cuboid (3D rectangle) with opposite corners: [emitterPosition.x - emitterSize.width/2, emitterPosition.y - emitterSize.height/2, emitterZPosition - emitterDepth/2], [emitterPosition.x + emitterSize.width/2, emitterPosition.y + emitterSize.height/2, emitterZPosition+emitterDepth/2].

[`line`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/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`).

[`point`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/point)

Particles are emitted from a single point at (`emitterPosition.x`, `emitterPosition.y`, `emitterZPosition`)

[`rectangle`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/rectangle)

Particles are emitted from a rectangle with opposite corners [emitterPosition.x - emitterSize.width/2, emitterPosition.y - emitterSize.height/2, emitterZPosition], [emitterPosition.x + emitterSize.width/2, emitterPosition.y + emitterSize.height/2, emitterZPosition].

[`sphere`](/documentation/QuartzCore/CAEmitterLayerEmitterShape/sphere)

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


---

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