Thu, 02/26/2004 - 12:35
Forums:
Hello all,
it seems that this Projection-Algorithm of the class GeomAPI_ProjectPointOnSurf is not working precise enough.
Ich project all poles of a BSPlineCurve onto a cylindrical surface. At first glance, the projected curves seem to be quite okay.
If I zoom the projected points, it is visible, that they never lie excactly on the surface.
I looked at the sourcecode of this OCC-class and found no hint about how to force a greater precision.
Did anyone of you experience comparable results ?
MCV
Thu, 02/26/2004 - 15:12
Hi,
I'm quite sure the curve is correct, but the display of the curve is not.
When you display a curve with OCC, a list of segment is computed according to the meshing parameters you are using ( deflectionAngle, etc.. ).
HTH
Thu, 02/26/2004 - 17:37
Thanks for your answer,
I did not change any deflection...meshing parameters.
I just converted surfaces to faces and splines to edges, to be able to return those data to a TopoDS_Compound for the OCC-QT-Visualizer.
Maybe that is the reason.
Is there another alternative ? Something to ommit the conversion to edges/segments and faces ???
MCV
Thu, 02/26/2004 - 18:30
I think there is no other aternative except increasing the deflection to have a better result, but you will only have smaller segments ( more accurate )