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# PhysicsSimulationEvents

Types of events that fire during physics simulations

```
enum PhysicsSimulationEvents
```

## Topics

### Structures

[`struct DidSimulate`](/documentation/RealityKit/PhysicsSimulationEvents/DidSimulate)

The event raised after the simulation advances to the current frame.

[`struct WillSimulate`](/documentation/RealityKit/PhysicsSimulationEvents/WillSimulate)

The event raised before the simulation advances to the current frame.

---

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