[vtkusers] Question about the vtk and iso-surface

[Wei Guo]

Hi,

I am new to vtk and I can not find the answer in the VTK FAQ. Sorry for
bothering you.

There are two files in the attachment: one is a data file and another is a
tcl program for the iso-surface. The data file is a volume of dimention
3*4*6: only the scalars of the first and last slice are defined as 10.0,
other slices are defined as 0.0.

My question is that I can not get the isosurface with isovalue as 0.0 but
can get all the other iso-surface from 1.0 to 10.0, though there are lots
0.0 in the file. And I use the version of vtk as 3.2.

Could some one help me with this problem?

Thanks,

Wei
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# vtk DataFile Version 2.0
Volume example
ASCII 
DATASET STRUCTURED_POINTS 
DIMENSIONS 3 4 6
ORIGIN 0 0 0 
SPACING 1.000000 1.000000 1.000000
POINT_DATA 72
SCALARS sampledata double
LOOKUP_TABLE default
10.000000 10.000000 10.000000 10.000000 10.000000 10.000000 10.000000 10.00000 10.000000 10.000000 10.000000 10.000000
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.00000 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.00000 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.00000 0.000000 0.000000 0.000000 0.000000
0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.00000 0.000000 0.000000 0.000000 0.000000
10.000000 10.000000 10.000000 10.000000 10.000000 10.000000 10.000000 10.00000 10.000000 10.000000 10.000000 10.000000
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