public static NurbsSurface ToRhinoSurface(DB.HermiteFace face, double relativeTolerance)
{
NurbsSurface nurbsSurface = default;
try
{
#if REVIT_2021
using (var surface = DB.ExportUtils.GetNurbsSurfaceDataForSurface(face.GetSurface()))
nurbsSurface = ToRhino(surface, face.GetBoundingBox());
#else
using (var surface = DB.ExportUtils.GetNurbsSurfaceDataForFace(face))
nurbsSurface = ToRhino(surface, face.GetBoundingBox());
#endif
}
catch (Autodesk.Revit.Exceptions.ApplicationException) { }
if (nurbsSurface is null)
{
using (var paramsU = face.get_Params(0))
using (var paramsV = face.get_Params(1))
{
nurbsSurface = FromHermiteSurface
(
paramsU,
paramsV,
face.Points,
face.MixedDerivs,
face.get_Tangents(0),
face.get_Tangents(1)
);
}
}
using (var bboxUV = face.GetBoundingBox())
{
nurbsSurface = nurbsSurface.Trim
(
new Interval(bboxUV.Min.U, bboxUV.Max.U),
new Interval(bboxUV.Min.V, bboxUV.Max.V)
) as NurbsSurface;
}
if (nurbsSurface is object)
{
double ctol = relativeTolerance * Revit.ShortCurveTolerance * 5.0;
if (ctol != 0.0)
{
// Extend using smooth way avoids creating C2 discontinuities
nurbsSurface = nurbsSurface.Extend(IsoStatus.West, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.East, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.South, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.North, ctol, true) as NurbsSurface ?? nurbsSurface;
}
}
return(nurbsSurface);
}
public static NurbsSurface ToRhinoSurface(this DB.HermiteFace face)
{
NurbsSurface nurbsSurface = default;
try
{
using (var surface = DB.ExportUtils.GetNurbsSurfaceDataForFace(face))
nurbsSurface = surface.ToRhino(face.GetBoundingBox());
}
catch (Autodesk.Revit.Exceptions.ApplicationException) { }
if (nurbsSurface is null)
{
nurbsSurface = FromHermiteSurface
(
face.Points,
face.MixedDerivs,
face.get_Params(0).Cast <double>().ToArray(),
face.get_Params(1).Cast <double>().ToArray(),
face.get_Tangents(0),
face.get_Tangents(1)
);
}
if (nurbsSurface is object)
{
double ctol = Revit.ShortCurveTolerance * 5.0;
// Extend using smooth way avoids creating C2 discontinuities
nurbsSurface = nurbsSurface.Extend(IsoStatus.West, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.East, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.South, ctol, true) as NurbsSurface ?? nurbsSurface;
nurbsSurface = nurbsSurface.Extend(IsoStatus.North, ctol, true) as NurbsSurface ?? nurbsSurface;
}
return(nurbsSurface);
}
