def divide_edge_by_nr_of_points(edg, n_pts):
'''returns a nested list of parameters and points on the edge
at the requested interval [(param, gp_Pnt),...]
'''
curve_adapt = BRepAdaptor_Curve(edg)
_lbound, _ubound = curve_adapt.FirstParameter(), curve_adapt.LastParameter(
)
if n_pts <= 1:
# minimally two points or a Standard_ConstructionError is raised
raise AssertionError("minimally 2 points required")
npts = GCPnts_UniformAbscissa(curve_adapt, n_pts, _lbound, _ubound)
if npts.IsDone():
tmp = []
for i in range(1, npts.NbPoints() + 1):
param = npts.Parameter(i)
pnt = curve_adapt.Value(param)
tmp.append((param, pnt))
return tmp
def length_from_edge(edg):
curve_adapt = BRepAdaptor_Curve(edg)
length = GCPnts_AbscissaPoint().Length(curve_adapt,
curve_adapt.FirstParameter(),
curve_adapt.LastParameter(), 1e-6)
return length