[vtkusers] extracting pointdata out of vtkXMLPolyDataReader

[Joeri Nicolaes]

I have written a vtk xml file (head.vtp see below) that consists of 2 points. I can read it in, but I can't extract the points out of the PolyData object. What am I doing wrong? 

# trying to read an vtk polydata xml file
vtkXMLPolyDataReader reader
 reader SetFileName "C:/Documents and Settings/staJN/My Documents/XMLhead/head.vtp"
# [reader GetOutput] is a polydata object!
set poly [reader GetOutput]
set points [$poly GetPoints]
puts [$poly GetNumberOfPoints]
OUTPUT: 0

Here is my xml file:
<?xml version="1.0"?>

<VTKFile type="PolyData" version="0.1" byte_order="LittleEndian">

<PolyData>

<Piece NumberOfPoints="2">

<Points>

<DataArray type="Float32" NumberOfComponents="3" format="ascii">

10 0 0 50 50 0

</DataArray>

</Points>

<PointData Scalars="my_scalars">

<DataArray type="Float32" Name="my_scalars" format="ascii">

1 1

</DataArray>

</PointData>

<CellData Scalars="cell_scalars">

<DataArray type="Int32" Name="cell_scalars" format="ascii">

0 1

</DataArray>

</CellData>

</Piece>

</PolyData>

</VTKFile>


Joeri,
Agfa Gevaert, R&D/TI
+ 32 (0) 3 444 6429,
stajn at agfa.com
joeri_vtk at hotmail.com
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