Mon, 06/22/2009 - 14:18
Forums:
Hi
How can I get angle values from TopoDS_Edge created from geom_curve??
my code is:
gp_Ax2 ax2 = new gp_Ax2(center,direction);
gp_Circ circle = new gp_Circ(ax2,radius);
GC_MakeArcOfCircle arcMaker = new GC_MakeArcOfCircle(circle, angle1,angle2, true);
if (arcMaker.IsDone())
{
Geom_TrimmedCurve arc = arcMaker.Value();
BRepBuilderAPI_MakeEdge edgeMaker = new BRepBuilderAPI_MakeEdge(arc);
return edgeMaker.Edge();
}
I looking for way to extract back angle1 and angle2 values from TopoDS_Edge. How can I do it?
Mon, 06/22/2009 - 22:49
Hi Marek,
one of the possibilities could be to extract the circle back from the edge and calculate the angles based on the obtained parameters value:
Standard_Real first = 0, last = 0;
Handle_Geom_Curve theCurve = BRep_Tool::Curve(TopoDS::Edge(edge,first,last);
if(theCurve.IsNull() == Standard_False)
{
Handle(Geom_Circle) circle = Handle(Geom_Circle)::DownCast(theCurve);
if(circle.IsNull() == Standard_False)
{
// if the edge is a circle-based one the angles are the parameter values: first and last
}
}
Pawel
Tue, 06/23/2009 - 21:29
Many thanks for help. It works the same for circle and ellipses.