# Sandbox.PolygonMesh.ExtendOrExtrudeVertices

```csharp
bool ExtendOrExtrudeVertices(IReadOnlyList<VertexHandle> vertices, float offset, float baseWidth, out List<VertexHandle> modifiedVertices, out List<VertexHandle> originalVertices, out List<FaceHandle> newFaces)
```

### Parameters

- `vertices` (`IReadOnlyList<VertexHandle>`)
- `offset` (`float`)
- `baseWidth` (`float`)
- `out modifiedVertices` (`List<VertexHandle>`)
- `out originalVertices` (`List<VertexHandle>`)
- `out newFaces` (`List<FaceHandle>`)

### Returns

`bool`

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