---
title: ClothSimulationEvents.Start
framework: realitykit
role: symbol
role_heading: Structure
path: realitykit/clothsimulationevents/start
---

# ClothSimulationEvents.Start

An event type that a cloth simulation publishes immediately after it starts.

## Declaration

```swift
struct Start
```

## Overview

Overview A simulation starts once before entering its update loop, at which point it regularly updates.

## Topics

### Accessing the simulation entity

- [simulationEntity](realitykit/clothsimulationevents/start/simulationentity.md)

## Relationships

### Conforms To

- [Event](realitykit/event.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Observing simulation events

- [ClothSimulationEvents.BeforeUpdate](realitykit/clothsimulationevents/beforeupdate.md)
- [ClothSimulationEvents.AfterUpdate](realitykit/clothsimulationevents/afterupdate.md)