Tells if the spline is rational or not.
If it is true (rational), then the NURBS is a piecewise rational polynomial function.
If it is false (non-rational), then the NURBS is a piecewise polynomial function.
Namespace:
Autodesk.Revit.DB
Assembly:
RevitAPI
(in RevitAPI.dll) Version: 17.0.0.0 (17.0.484.0)
Since:
2016