# RunSimulation

> This stage advances the scene in time.

## Definition

* **Type:** Field
* **Namespace:** [UnityEngine](/engine/6000.0/script-reference/unityengine.md)
* **Assembly:** UnityEngine.PhysicsModule

```csharp
RunSimulation = 2
```

### Remarks

Specifically, this stage:

* Clears stored contact, trigger, and joint break events.
* Updates all vehicles forward in time.
* Advances the physics scene forward in time.
* Invokes the [Physics.ContactModifyEvent](/engine/6000.0/script-reference/unityengine/physics/contactmodifyevent.md).
* Reads and stores contact, trigger, and joint break events.