[vtkusers] vtkContourFilter::SetValue-Can anyone help me ?

[Anh Tuan]

Hi all VTK users!

I'm a VTK newbie;I'm developing  a VTK Application .
I want render 3D volume from a serie of 2D slices(images)!
I've used code like in VTK example (vtk\Examples\Medical\TCL\Medical3.tcl) :

1 vtkContourFilter skinExtractor
2   skinExtractor SetInput  [v16 GetOutput]
3   skinExtractor SetValue 0 500
4 vtkPolyDataNormals skinNormals
5   skinNormals SetInput [skinExtractor GetOutput]
6   skinNormals SetFeatureAngle 60.0
7 vtkStripper skinStripper
8   skinStripper SetInput [skinNormals GetOutput]
9 vtkPolyDataMapper skinMapper
10   skinMapper SetInput [skinStripper GetOutput]
11   skinMapper ScalarVisibilityOff
12 vtkActor skin
 ..... And so on!
It works well.
but my problem is with a specific serie of slices , I can't determine 
which value is used in SetValue function in line 3 (for example , this is 500 but i dont know how to calculator  it)
(Both Parameters , but 2nd Parameter is more imporant).
I ve tried to find the solution in VTK document,example ... but it has no good result.
Can anyone help me ?
I'm using vtk4.2 !
Thanks !



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