# Concavity 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 v6.2

```cs
public enum Concavity
```

Enumerates the possible types of edge concavity types.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | -1 | Concavity is not relevant, for example naked and non-manifold edges cannot have a concavity measure. |
| Tangent | 0 | Faces on either side of the edge are tangent within tolerance. |
| Convex | 1 | Faces on either side of the edge are convex. |
| Concave | 2 | Faces on either side of the edge are concave. |