Projects a curve onto a polygon surface.
> ![](../images/GUID-96432FB8-EBE9-4D1A-8DED-5173E032EBC0-low.png)
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Specifies the direction in which the curve on the mesh will be projected.
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Restricts edit point placement to the edges of the polygon. Otherwise, the edit points can appear at different points along
the faces as well as the edges.