# SweepFrame enum

Namespace: [Rhino.Geometry](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.geometry.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v7.0

```cs
public enum SweepFrame
```

Frame types for creating swept surfaces

## Values

| Name | Value | Description |
| --- | --- | --- |
| Freeform | 0 | The cross-section curve rotates to maintain its angle to the rail throughout the sweep. |
| Roadlike | 1 | Specify an axis for calculating the 3-D rotation of the cross-section. |
| AlignWithSurface | 2 | The cross-section rotates to follow the normal of the surface that the rail lies on. This requires a rail that knows its surface, so pass a BrepEdge or a BrepTrim as the rail. Any other curve falls back to Freeform. |