# Sandbox.PolygonMesh.FindOpenEdgeIslands

```csharp
void FindOpenEdgeIslands(IReadOnlyList<HalfEdgeHandle> edgeList, out List<List<HalfEdgeHandle>> outEdgeIslands)
```

### Parameters

- `edgeList` (`IReadOnlyList<HalfEdgeHandle>`)
- `out outEdgeIslands` (`List<List<HalfEdgeHandle>>`)

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