Helix curve seems not complete

[shang-zd]

Hi there,

In the makeCylindricalHelix() fuction, a helix was made. However, it seems that this helix is not complete.

The code goes like:

Standard_Real aRadius = 3.0;

Standard_Real aPitch = 1.0;

gp_Lin2d aLine2d(gp_Pnt2d(0.0, 0.0), gp_Dir2d(aRadius, aPitch));

Handle(Geom2d_TrimmedCurve) aSegment = GCE2d_MakeSegment(aLine2d, 0.0, M_PI * 2.0).Value();

Handle(Geom_CylindricalSurface) aCylinder = new Geom_CylindricalSurface(gp::XOY(), aRadius);

TopoDS_Edge aHelixEdge = BRepBuilderAPI_MakeEdge(aSegment, aCylinder, 0.0, 6.0 * M_PI).Edge(); 

It should create a helix curve with 3 circles, but the result curve (as below) seems less than 3 circles.

Anyone could have a look?

Thanks.
Regards.
Zd

[Shing Liu]

TopoDS_Edge aHelixEdge = BRepBuilderAPI_MakeEdge(aSegment, aCylinder, 0.0, 6.0 * M_PI).Edge();
Here the edge range is not 6.0 * M_PI, it should be 3.0 * M_PI * Circle Diameter.