# OnTransformTweenWrite(TransformTweenWriteEvent)

> The callback will only occur if _transformTweenMode is set to PhysicsWorld.TransformTweenMode.Custom and there are transform write tweens available. This will always be called on the main-thread after the simulation has finished. You should avoid write operations on physics objects during this callback. NOTE: When transform tweening, you can calculate PhysicsBody.TransformWriteMode.Interpolate or PhysicsBody.TransformWriteMode.Extrapolate write modes by using PhysicsBody.TransformWriteTween.GetInterpolatedPose and PhysicsBody.TransformWriteTween.GetExtrapolatedPose respectively.

## Definition

* **Type:** Method
* **Namespace:** [Unity.U2D.Physics](/engine/6000.7/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
void OnTransformTweenWrite(PhysicsEvents.TransformTweenWriteEvent transformTweenWriteEvent)
```

### Parameters

**** (\[TransformTweenWriteEvent]\(/engine/6000.7/script-reference/unity/u2d/physics/physicsevents/transformtweenwriteevent)): The event that occurred.