# ParticleSystemEmissionType

> The mode in which particles are emitted.

## Definition

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

> **Warning:**
>
> **Deprecated.** ParticleSystemEmissionType no longer does anything. Time and Distance based emission are now both always active.

```csharp
public enum ParticleSystemEmissionType
```

## Fields

| Value                                                                                          | Description              |
| ---------------------------------------------------------------------------------------------- | ------------------------ |
| [Distance](/engine/6000.0/script-reference/unityengine/particlesystememissiontype/distance.md) | Emit when emitter moves. |
| [Time](/engine/6000.0/script-reference/unityengine/particlesystememissiontype/time.md)         | Emit over time.          |