internal override void SetXML(XmlElement xml, BaseClassIfc host, HashSet<int> processed)
{
base.SetXML(xml, host, processed);
xml.AppendChild(Directrix.GetXML(xml.OwnerDocument, "Directrix", this, processed));
if (!double.IsNaN(mStartParam))
xml.SetAttribute("StartParam", mStartParam.ToString());
if (!double.IsNaN(mEndParam))
xml.SetAttribute("EndParam", mEndParam.ToString());
xml.AppendChild(ReferenceSurface.GetXML(xml.OwnerDocument, "ReferenceSurface", this, processed));
}