>> Now I want to extract some information from the imported geometry.
>> The
>> geometry consists of 3 b-spline curves with knots. I've perused the
>> doxygen
>> generated documents but I'm still rather lost on how to begin. I'm
>> unclear
>> on how to even start a simple task like extracting the points from
>> the
>> spline. Suggestions?
Loop over the topology, using:
from OCC.Utils.Topology import Topo
explore = Topo( yourTopoDS_* instance )
# adapt the edge to a curve
from OCC.BRepAdaptor import *
for edg in explore.edges():
# returns a Geom_BSplineCurve
crv = BRepAdaptor_Curve( edg ).BSpline()
if crv.BSpline():
for knot in crv.Knots():
# do something useful with your spline
elif crv.Line():
# not a BSpline ;')
# returns gp_Lin, the OCC line primitive
Check out the Geom module in Modelling Data for useful methods of
dealing with your spline.
-jelle
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