private static Autodesk.DesignScript.Geometry.Curve Convert(Autodesk.Revit.DB.NurbSpline crv)
{
var convert = NurbsCurve.ByControlPointsWeightsKnots(crv.CtrlPoints.Select(x => x.ToPoint()).ToArray(),
crv.Weights.Cast<double>().ToArray(), crv.Knots.Cast<double>().ToArray(), crv.Degree );
if (!crv.IsBound) return convert;
// bound the curve parametric range
// we first get the full parametric domain from the knots
// note that some knots be negative and the domain may appear reversed
var parms = crv.Knots.Cast<double>().ToList();
var fsp = parms.First();
var fep = parms.Last();
// obtain the full domain
var fd = Math.Abs(fsp - fep);
// these are the start and end parameters of the bound curve
var sp = crv.get_EndParameter(0);
var ep = crv.get_EndParameter(1);
// get the normalized parameters for trim
var nsp = Math.Abs(fsp - sp) / fd;
var nep = Math.Abs(fsp - ep) / fd;
return convert.ParameterTrim(nsp, nep);
}
private static Autodesk.DesignScript.Geometry.Curve Convert(Autodesk.Revit.DB.HermiteSpline crv)
{
var convert = HermiteToNurbs.ConvertExact(crv);
if (!crv.IsBound) return convert;
// bound the curve parametric range
// we first get the full parametric domain from the parameters
// note that some knots be negative and the domain may appear reversed
var parms = crv.Parameters.Cast<double>().ToList();
var fsp = parms.First();
var fep = parms.Last();
// obtain the full domain
var fd = Math.Abs(fsp - fep);
// these are the start and end parameters of the bound curve
var sp = crv.get_EndParameter(0);
var ep = crv.get_EndParameter(1);
// get the normalized parameters for trim
var nsp = Math.Abs(fsp - sp)/fd;
var nep = Math.Abs(fsp - ep)/fd;
return convert.ParameterTrim(nsp, nep);
}