# BuoyancyInput()

> Create a default PhysicsBody.BuoyancyInput. The PhysicsBody.BuoyancyInput.mask defaults to PhysicsMask.All so every attached shape contributes unless explicitly filtered out. The surface defaults to a flat horizontal water surface at the world origin ( PhysicsBody.BuoyancyInput.surfacePosition = Vector2.zero, PhysicsBody.BuoyancyInput.surfaceNormal = Vector2.up ).

## Definition

* **Type:** Constructor
* **Namespace:** [Unity.U2D.Physics](/engine/7000.0/script-reference/unity/u2d/physics.md)
* **Assembly:** UnityEngine.PhysicsCore2DModule

```csharp
public BuoyancyInput()
```