# GetSafeCollisionEventSize(ParticleSystem)

> Safe array size for use with GetCollisionEvents.

## Definition

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

```csharp
public static int GetSafeCollisionEventSize(this ParticleSystem ps)
```

### Parameters

**** (\[ParticleSystem]\(/engine/6000.0/script-reference/unityengine/particlesystem)): 

### Returns

| Type                                                       | Description |
| ---------------------------------------------------------- | ----------- |
| [int](https://learn.microsoft.com/dotnet/api/system.int32) |             |

### Remarks

This is guaranteed to be large enough to use with GetCollisionEvents for the current frame. GetCollisionEvents may return fewer elements for some GameObjects though.