# SubDPatchStyle 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)

```cs
public enum SubDPatchStyle
```

SubD::PatchStyle identifies the style of patch used to fill holes.

## Values

| Name | Value | Description |
| --- | --- | --- |
| Unset | 0 | Not a valid style. This encourages developers to thoughtfully select a patch style and can be used to indicate a UI control is not initialized. |
| Automatic | 1 | Automatically choose a patch style that will generally create a good looking result. If a hole boundary is not convex, it is triangulated. Otherwise: If a hole has 3 edges, a single triangle face is used. If a hole has 4 edges, a single quad face is used. If a hole has 5 or more edges and an odd number of edges, a triangle fan is used. If a hole has 6 or more edges and an even number of edges, a quad fan is used. |
| SingleFace | 2 | A single face is used under all conditions. |
| TriangleFan | 3 | A triangle fan used under all conditions. The center of the fan is the average of the hole boundary vertex control net points. |
| QuadOrTriangleFan | 4 | If the hole boundary has an even number of edges, a quad fan is used. Otherwise a triangle fan is used. The center of the fan is the average of the hole boundary vertex control net points. |
| Triangulated | 5 | The hole boundary is triangluated. Typically this style is selected when a boundary not convex and the other styles produce faces with overlapping regions. |