# Projection enum

Namespace: [Rhino.Render](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.render.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md) · Since v8.15

```cs
public enum Projection
```

When a mapping primitive, like a plane, sphere, box, or cylinder, is used, there are two projection options. If m_type = srfp_mapping, then m_projection is ignored.

## Values

| Name | Value | Description |
| --- | --- | --- |
| None | 0 | None |
| ClosestPoint | 1 | ClosestPoint: world xyz maps to the point on the mapping primitive that is closest to xyz. In this case, ON_TextureMapping::Evaluate ignores the vector argument. |
| Ray | 2 | Ray: world xyz + world vector defines a world line. The world line is intersected with the mapping primitive and the intersection point that is closest to the world xyz point is used to calculate the mapping parameters. |