def intersection(shp1: TopoDS_Shape,
shp2: Union[TopoDS_Shape, gp.GP3d]) -> TopoDS_Shape:
"""
Most Robust TopoDS intersection
BRepAlgoAPI_Common will only return if the intersection is solid.
BRepAlgoAPI_Section will work for face-on-face
similar issue with GeomAPI is documented here:
https://www.opencascade.com/content/use-brepalgosection-instead-brepalgoapisection
:param: shp1 - TopoDS_Shape1
:param: shp2 - TopoDS_Shape2
BRepAlgoAPI_Section(TopoDS_Shape const &,TopoDS_Shape const &,BOPAlgo_PaveFiller const &,Standard_Boolean const)
BRepAlgoAPI_Section(TopoDS_Shape const &,TopoDS_Shape const &,Standard_Boolean const)
BRepAlgoAPI_Section(TopoDS_Shape const &,gp_Pln const &,Standard_Boolean const)
BRepAlgoAPI_Section(TopoDS_Shape const &,Handle_Geom_Surface const &,Standard_Boolean const)
BRepAlgoAPI_Section(Handle_Geom_Surface const &,TopoDS_Shape const &,Standard_Boolean const)
BRepAlgoAPI_Section(Handle_Geom_Surface const &,Handle_Geom_Surface const &,Standard_Boolean const)
returns wires representing the intersection
"""
intrs = BRepAlgoAPI_Section(shp1, shp2)
if intrs.BuilderCanWork() is True:
intrs.Build()
# todo add isDone check (maybe ??)
# intrs.FuseEdges()
intrs.RefineEdges()
shp = intrs.Shape()
intrs.Destroy()
return shp
def splitwire(base, in_edge):
sect = BRepAlgoAPI_Section(base, in_edge)
sect.Build()
sect.RefineEdges()
edge = sect.Shape()
splt = BRepFeat_SplitShape(base)
Ex = TopExp_Explorer(edge, TopAbs_VERTEX)
while Ex.More():
# print(Ex.Current())
Sx = TopExp_Explorer(base, TopAbs_EDGE)
while Sx.More():
if sect.HasAncestorFaceOn1(Ex.Current(), Sx.Current()):
print('add', Ex.Current(), Sx.Current())
splt.Add(Ex.Current(), Sx.Current())
Sx.Next()
Ex.Next()
splt.Build()
return splt.Shape()