# IsoStatus 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 IsoStatus
```

Defines enumerated values for isoparametric curve direction on a surface, such as X or Y, and curve sides, such as North or West boundary.

Note: odd values are all x-constant; even values > 0 are all y-constant.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | curve is not an isoparametric curve. |
| X | 1 | curve is a "x" = constant (vertical) isoparametric curve in the interior of the surface's domain. |
| Y | 2 | curve is a "y" = constant (horizontal) isoparametric curve in the interior of the surface's domain. |
| West | 3 | curve is a "x" = constant isoparametric curve along the west side of the surface's domain. |
| South | 4 | curve is a "y" = constant isoparametric curve along the south side of the surface's domain. |
| East | 5 | curve is a "x" = constant isoparametric curve along the east side of the surface's domain. |
| North | 6 | curve is a "y" = constant isoparametric curve along the north side of the surface's domain. |