# SendTriggerCallbacks()

> Send all current _triggerBeginEvents and _triggerEndEvents where either of the PhysicsShape involved are valid (see _isValid ) and have a callback target assigned (see _callbackTarget ). These events will only be created if one of the shape pairs has _triggerEvents set to true. Only callback targets that implement PhysicsCallbacks.ITriggerCallback will be called. This will be called automatically if _autoTriggerCallbacks is true. This must be called on the main thread.

## Definition

* **Type:** Method
* **Namespace:** [Unity.U2D.Physics](/engine/6000.5/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public void SendTriggerCallbacks()
```