# BrepLoopType 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 v5.0

```cs
public enum BrepLoopType
```

Each brep loop has a defined type, e.g. outer, inner or point on surface.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Unknown | 0 | Unknown loop type. |
| Outer | 1 | 2d loop curves form a simple closed curve with a counterclockwise orientation. |
| Inner | 2 | 2d loop curves form a simple closed curve with a clockwise orientation. |
| Slit | 3 | Always closed - used internally during splitting operations. |
| CurveOnSurface | 4 | "loop" is a curve-on-surface made from a single (open or closed) trim that has type TrimType.CurveOnSurface. |
| PointOnSurface | 5 | "loop" is a PointOnSurface made from a single trim that has type TrimType.PointOnSurface. |