# massConfiguration

> The body mass configuration comprised of the _mass, _rotationalInertia and _localCenterOfMass. Normally this is computed automatically as each PhysicsShape is added, removed or changed on a body. This will automatically change if the body type changes, for instance, a Static or Kinematic body always have zero mass and rotational inertia. The individual properties of the _massConfiguration and be accessed using _mass, _rotationalInertia and _localCenterOfMass. The PhysicsBody.MassConfiguration will be overwritten when setting this property or if PhysicsBody.ApplyMassFromShapes is called or when adding, removing or changing PhysicsShape with _startMassUpdate enabled. To make a value persist across those recalculations, override it with _massOverride; with anything overridden, setting this property authors the override values instead of writing the body directly, so overridden values persist and the rest are rederived from the attached shapes.

## Definition

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

```csharp
public PhysicsBody.MassConfiguration massConfiguration { get; set; }
```