---
title: "emitter::periodicBurst"
framework: Compute Graph
role: symbol
role_heading: Function
platforms: [iOS 27.0+, iPadOS 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: computegraph/emitter/periodicburst
---

# emitter::periodicBurst

Emit a burst of particles periodically.

## Declaration

```swift
void emitter::periodicBurst(float2 intervalRange, uint burstSize)
```

## Parameters

- `intervalRange`: Minimum/Maximum duration between spawns. After each burst, the interval before the next burst will be chosen randomly in this interval.
- `burstSize`: Number of particles to emit at system creation or reset.

## Discussion

Discussion note:  note: Reads from emitter state PeriodicEmitterState state, if it exists