# PhysicsCallbacks

> All callback interfaces and targets.

## Definition

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

```csharp
public readonly struct PhysicsCallbacks
```

## Structs

| Struct                                                                                                                                                | Description                                                                                                                                                                                                |
| ----------------------------------------------------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [PhysicsCallbacks.BodyUpdateCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/bodyupdatecallbacktargets.md)         | Contains all the body update callback targets returned from [PhysicsWorld.GetBodyUpdateCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/getbodyupdatecallbacktargets.md).   |
| [PhysicsCallbacks.ContactCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/contactcallbacktargets.md)               | Contains all the contact callback targets returned from [PhysicsWorld.GetContactCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/getcontactcallbacktargets.md).             |
| [PhysicsCallbacks.JointThresholdCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/jointthresholdcallbacktargets.md) | Contains all the joint callback targets returned from [PhysicsWorld.GetJointThresholdCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/getjointthresholdcallbacktargets.md). |
| [PhysicsCallbacks.TriggerCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/triggercallbacktargets.md)               | Contains all the trigger callback targets returned from [PhysicsWorld.GetTriggerCallbackTargets](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/gettriggercallbacktargets.md).             |

## Interfaces

| Interface                                                                                                                                     | Description                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| --------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| [PhysicsCallbacks.IBodyUpdateCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/ibodyupdatecallback.md)             | An interface that when implemented, can be called as a target by [PhysicsWorld.SendBodyUpdateCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/sendbodyupdatecallbacks.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    |
| [PhysicsCallbacks.IContactCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/icontactcallback.md)                   | An interface that when implemented, can be called as a target by [PhysicsWorld.SendContactCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/sendcontactcallbacks.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |
| [PhysicsCallbacks.IContactFilterCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/icontactfiltercallback.md)       | An interface that when implemented, can be called as a target when a [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) has [\_contactFilterCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/contactfiltercallbacks.md) set to true. The [PhysicsWorld](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld.md) the [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) is in also has to have its [\_contactFilterCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/contactfiltercallbacks.md) set to true.                                                  |
| [PhysicsCallbacks.IJointThresholdCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/ijointthresholdcallback.md)     | An interface that when implemented, can be called as a target by [PhysicsWorld.SendJointThresholdCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/sendjointthresholdcallbacks.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                            |
| [PhysicsCallbacks.IPreSolveCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/ipresolvecallback.md)                 | An interface that when implemented by a [Object](/engine/6000.5/script-reference/unityengine/object.md), can be called as a target when a [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) has [\_preSolveCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape/presolvecallbacks.md) set to true. The [PhysicsWorld](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld.md) the [PhysicsShape](/engine/6000.5/script-reference/unity/u2d/physics/physicsshape.md) is in also has to have its [\_preSolveCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/presolvecallbacks.md) set to true. |
| [PhysicsCallbacks.ITransformChangedCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/itransformchangedcallback.md) | An interface that when implemented, can be called when using [PhysicsWorld.RegisterTransformChange](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/registertransformchange.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| [PhysicsCallbacks.ITransformWriteCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/itransformwritecallback.md)     | An interface that when implemented, can be called as a target set with [\_transformWriteCallbackTarget](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/transformwritecallbacktarget.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| [PhysicsCallbacks.ITriggerCallback](/engine/6000.5/script-reference/unity/u2d/physics/physicscallbacks/itriggercallback.md)                   | An interface that when implemented, can be called as a target by [PhysicsWorld.SendTriggerCallbacks](/engine/6000.5/script-reference/unity/u2d/physics/physicsworld/sendtriggercallbacks.md).                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          |