about Geom_Curve

water's picture
water
Thu, 12/22/2005 - 11:53
Forums: 
Other usage issues

Hi everybody,

Handle(Geom_Curve) curve = BRep_Tool::Curve(Edge,First,Last);

if Edge is not null,but curve is null.
what is the problem?

Best Regards,
water

François Lauzon's picture
François Lauzon (not verified)
Thu, 12/22/2005 - 18:44

Your edge might be a 2d edge only (curve on surface), so that's why you can't extract 3d curve information from it. But if you really want to know what's the problem, use your debugger and step into the BRep_Tool:Curve method to see what is happenning.

Good Luck,
Francois.

water's picture
water
Fri, 12/23/2005 - 04:47

Thanks a lot,

If the edge doesn't have 3d curve information,can we make the reference to it?

Best Regards,
water

LI's picture
LI
Mon, 10/16/2006 - 23:28

Hi, I have the "edge" on the "face". I'd like to make another edge "edge1" that is the same as the "edge", but OCC doesn't work. Do you have a good idea?

Handle(Geom_Surface) gsrf=BRep_Tool::Surface(face);
Handle(Geom2d_Curve) aC2D = BRep_Tool::CurveOnSurface(edge,face,aFirst,aLast);
TopoDS_Edge edge1=BRepBuilderAPI_MakeEdge(aC2D,face1);