Radius of edge.

Hi,

try this :

TopoDS_Shape S = BRepPrimAPI_MakeSphere(10);

Standard_Real Radius;

TopExp_Explorer exp;
for (exp.Init(S,TopAbs_EDGE); exp.More(); exp.Next())
{
Standard_Real U1, U2;
Handle (Geom_Curve) GC1 = BRep_Tool::Curve(TopoDS::Edge(exp.Current()), U1, U2);
if (! GC1.IsNull())
{
Handle (Geom_Circle) GCC1 = Handle (Geom_Circle)::DownCast(GC1);
if (! GCC1.IsNull())
{
Radius = GCC1->Circ().Radius();
Handle(AIS_Shape) S1 = new AIS_Shape(exp.Current());
myAISContext->Display(S1);
break;
}
}
}

In this code, I create a sphere and then try to get a circular edge (a seam edge, not a degenerated one).

When I have this edge, I get the underlying Geom_curve, downcast this curve into a Geom_Circle, test the validity of the handle, to check if the downcast operation succeeded.

When I have the Geom_Circle, I apply "Radius()" method.

Take care, Radius() method is defined in gp_Circ, not in Geom_Circle ! So ... don't forget to include gp_Circ.hxx ...

mbd