public static BSpline3D ToBSpline3D(this ICurve swCurve, bool isClosed)
{
return(swCurve
.GetBCurveParams5
(WantCubicIn: false
, WantNRational: false
, ForceNonPeriodic: false
, IsClosed: isClosed
)
.ToBSpline3D(isClosed));
}