Refactor FemDesign.Grasshopper.Convert

End goal

Make the conversion from Rhino/Grasshopper geometry to FemDesign.Geometry easier. For C# users and Grasshopper C#/Python users.

Suggestion

Many (but not all) of the FemDesign.Grasshopper.Convert methods are marked as internal so there are no simple conversion from rhino geometry to fd geometry right now.

I suggest we refactor the class FemDesign.Grasshopper.Convert.cs

• Make the methods public
• Rename all methods to .ToRhino() and .FromRhino() to make it easier. Maybe use Rhino.Geometry.GeometryBase

Originally posted by @xRadne in https://github.com/strusoft/femdesign-api/issues/328#issuecomment-1163210861

Regions

Geometry

Using a single interface-method object IFromRhino(this Rhino.Geometry.GeometryBase geometry)

• Vector (Using separate method for points and vectors FdPoint3d FromRhino(this Rhino.Geometry.Point3d point))
• Edge (All OK, except for Polyline and Nurbs curve wich dont have a correcponding type in FemDesign.Geometry.Edge)
• CoordinateSystem
• Region
• RegionGroup

Structure

These objects does not make any sense to have a .FromRhino() method. Only .ToThino()

• Bar
• Cover
• LineLoad
• PointLoad
• PressureLoad
• SurfaceLoad
• SlabPart
• LineSupport
• PointSupport

Start with FemDesign.Grasshopper.Convert.cs and review the currently public and internal conversion methods. Compare the listed Geometry and Structure regions, especially the unfinished Edge and load conversions, and confirm which methods should be named ToRhino() or FromRhino(). Done means the proposed conversions are consistently exposed and named for the supported Rhino and FemDesign geometry types.