# ParticleSystemOverlapAction

> What action to perform when the particle trigger module passes a test.

## Definition

* **Type:** Enum
* **Namespace:** [UnityEngine](/engine/6000.7/script-reference/unityengine.md)
* **Assembly:** UnityEngine.ParticleSystemModule

```csharp
public enum ParticleSystemOverlapAction
```

## Fields

| Value                                                                                           | Description                                                         |
| ----------------------------------------------------------------------------------------------- | ------------------------------------------------------------------- |
| [Callback](/engine/6000.7/script-reference/unityengine/particlesystemoverlapaction/callback.md) | Send the OnParticleTrigger command to the Particle System's script. |
| [Ignore](/engine/6000.7/script-reference/unityengine/particlesystemoverlapaction/ignore.md)     | Do nothing.                                                         |
| [Kill](/engine/6000.7/script-reference/unityengine/particlesystemoverlapaction/kill.md)         | Kill all particles that pass this test.                             |