# Sandbox.PolygonMesh.AddVertexToEdge

```csharp
bool AddVertexToEdge(VertexHandle hVertexA, VertexHandle hVertexB, float flParam, out VertexHandle pOutNewVertex)
```

### Parameters

- `hVertexA` (`VertexHandle`)
- `hVertexB` (`VertexHandle`)
- `flParam` (`float`)
- `out pOutNewVertex` (`VertexHandle`)

### Returns

`bool`

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