def curve_of_wire(wire):
"""
Get the curve of the wire. The edges are concatenated so the
resulting curve may be C0 continuous.
:param OCCT.TopoDS.TopoDS_Wire wire: The wire.
:return: Concatenated curve of wire.
:rtype: OCCT.Geom.Geom_BSplineCurve
:raise RuntimeError: If an unsupported curve type is found.
"""
geom_convert = GeomConvert_CompCurveToBSplineCurve()
exp = BRepTools_WireExplorer(wire)
tol = ExploreShape.global_tolerance(wire, 1)
while exp.More():
e = TopoDS.Edge_(exp.Current())
exp.Next()
adp_crv = BRepAdaptor_Curve(e)
geom_convert.Add(adp_crv.BSpline(), tol)
crv = geom_convert.BSplineCurve()
if not isinstance(crv, Geom_BSplineCurve):
msg = 'Unsupported curve type.'
raise RuntimeError(msg)
return crv
def curve(self):
"""
:return: The curve formed by concatenating all the underlying curves
of the edges.
:rtype: afem.geometry.entities.NurbsCurve
"""
geom_convert = GeomConvert_CompCurveToBSplineCurve()
exp = BRepTools_WireExplorer(self.object)
tol = self.tol_max
while exp.More():
e = TopoDS.Edge_(exp.Current())
exp.Next()
adp_crv = BRepAdaptor_Curve(e)
geom_convert.Add(adp_crv.BSpline(), tol)
geom_curve = geom_convert.BSplineCurve()
return Curve.wrap(geom_curve)