the GeomAPI_IntSS has bugs

we use the GeomAPI_IntSS to obtain the section of two Handle(Geom_Surface) ,the two surface really has section,and the GeomAPI_IntSS IsDone well,but the NbLines=0,i don't konw why? I checked the topo objects of the two surface,find that the
myOrient of my toposhape is error,has no value,does't the reason the GeomAPI_IntSS not work well,please tell me why toposhapes has no oriention,and how i to reset it.

srq503's picture

I have solve the problem

find that two same topo_shapes use the GeomAPI_IntSS will
return topoabs_compound object,but when display,there's nothing to show.