# Sandbox.PolygonMesh.ComputeOpenEdgeExtendDirection

```csharp
Vector3 ComputeOpenEdgeExtendDirection(HalfEdgeHandle edge)
```

### Parameters

- `edge` (`HalfEdgeHandle`)

### Returns

`Vector3`

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