# generateOnTriggerStayEvents

> Whether the physics system sends OnTriggerStay events.

## Definition

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

```csharp
public static bool generateOnTriggerStayEvents { get; }
```

### Remarks

Use this API to check whether `OnTriggerStay` events are enabled. This lets you add fallback paths to scripts that assume `OnTriggerStay` events are enabled.

Physics backends typically only send events when a collider enters or exits a trigger. Unity's physics system keeps track of which colliders remain inside a trigger, and generates an `OnTriggerStay` event.

However, generating `OnTriggerStay` events has some overhead. If you only make use of `OnTriggerEnter` and `OnTriggerExit`, you can turn this behaviour off in the Physics Settings. Disabling the generation of `OnTriggerStay` events provides performance benefits, especially for complex scenes.

**Note**: This property is read-only. To change this setting, use Project Settings in the Editor.

### Examples

```csharp
using UnityEngine;

public class Example : MonoBehaviour
{
    void Start()
    {
        if (Physics.generateOnTriggerStayEvents)
            Debug.LogWarning("OnTriggerStay events are enabled. Consider disabling these from Physics Settings if you do not make use of OnTriggerStay, as it comes with performance gains.");
    }
}
```