# Sandbox.PolygonMesh.ComputeFaceNormal

```csharp
void ComputeFaceNormal(FaceHandle hFace, out Vector3 pOutNormal)
```

### Parameters

- `hFace` (`FaceHandle`)
- `out pOutNormal` (`Vector3`)

Declared in [Sandbox.PolygonMesh](/api/Sandbox.PolygonMesh).
Assembly: `Sandbox.Engine`.