# GetLayerCollisionMask(int)

> Get the collision layer mask that indicates which layer(s) the specified layer can collide with.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine](/engine/6000.5/script-reference/unityengine.md)
* **Assembly:** UnityEngine.Physics2DModule

```csharp
public static int GetLayerCollisionMask(int layer)
```

### Parameters

**** (\[int]\(https\://learn.microsoft.com/dotnet/api/system.int32)): The layer to retrieve the collision layer mask for.

### Returns

| Type                                                       | Description                                                                             |
| ---------------------------------------------------------- | --------------------------------------------------------------------------------------- |
| [int](https://learn.microsoft.com/dotnet/api/system.int32) | A mask where each bit indicates a layer and whether it can collide with `layer` or not. |

### Remarks

Additional Resources: [Physics2D.SetLayerCollisionMask](/engine/6000.5/script-reference/unityengine/physics2d/setlayercollisionmask.md), [Physics2D.IgnoreLayerCollision](/engine/6000.5/script-reference/unityengine/physics2d/ignorelayercollision.md).