Hi list!
What is the best way of finding the length of a curve in mayavi? I have a
small snippet, which works fine for a most curves, but not always.
In the snippet below "pd" is <tvtk_classes.poly_data.PolyData object at
0xee00d4c>:
pd = foo.outputs[0]
PTS=pd.points.to_array()
lines=pd.lines
linesdata=lines.data.to_array()
l1=linesdata.reshape(PTS.shape)
curvelen=(((PTS[l1[:,1:]][:,1,:]-
PTS[l1[:,1:]]:,0,:])**2).sum(axis=1)**.5).sum()
A related issue is with mlab.pipeline.stripper: if I use that while producing
"foo", filtering the line (foo) with mlab.pipeline.tube later on will cause
error messages (mayavi claims the vtk object contains no data) when I change
the scalars! The same happens also with mlab.pipeline.surface if I have used
DepthSortPolyData to construct what ever I feed to surface. Any idea why?
I would have thought setting scene.disable_render = True would prevent that,
but it does not seem to have any effect (i.e. I see on screen as mayavi runs
thourgh the script: first a surface appears, then a tube, then my title, then
the title moves to the right location and finally the view angle is changed).
Is this normal? Why?
Cheers,
Juha
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