---
title: "fastForward(stepCount:stepDeltaTime:)"
framework: realitykit
role: symbol
role_heading: Instance Method
platforms: [iOS 27.0+, iPadOS 27.0+, macOS 27.0+, tvOS 27.0+, visionOS 27.0+]
path: "realitykit/computegraphcomponent/fastforward(stepcount:stepdeltatime:)"
---

# fastForward(stepCount:stepDeltaTime:)

Advances the particle simulation by multiple steps in a single operation.

## Declaration

```swift
mutating func fastForward(stepCount: Int, stepDeltaTime: Float)
```

## Parameters

- `stepCount`: The number of simulation steps to execute. Each step represents one iteration of the simulation update cycle. Must be positive.
- `stepDeltaTime`: The time interval (in seconds) to use for each simulation step.

## Discussion

Discussion note: The simulation will be advanced by a total time of stepCount * stepDeltaTime seconds.