# Sandbox.PolygonMesh.ExtendEdges

```csharp
bool ExtendEdges(IReadOnlyList<HalfEdgeHandle> edges, float amount, out List<HalfEdgeHandle> newEdges, out List<FaceHandle> newFaces)
```

### Parameters

- `edges` (`IReadOnlyList<HalfEdgeHandle>`)
- `amount` (`float`)
- `out newEdges` (`List<HalfEdgeHandle>`)
- `out newFaces` (`List<FaceHandle>`)

### Returns

`bool`

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