[vtkusers] Problems about export STL file

[An Jiye]

Hi.

I use vtkMarchingCubes to extract an isosurface from a series of input
images. Now I want to save the result to an ASCII STL file. It works well on
my machine. It is like this:

.. ...
 facet normal 0 0 1
  outer loop
   vertex -6.5625 -111.563 -10
   vertex -5.625 -112.5 -10
   vertex -5.625 -111.563 -10
  endloop
 endfacet
 facet normal 0 0 1
  outer loop
   vertex -4.6875 -112.5 -10
   vertex -4.6875 -111.563 -10
   vertex -5.625 -112.5 -10
  endloop
 endfacet
.. ...


But when goes to others' machine, I get the following result:

.. ...
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
 facet normal 0 0 -1
.. ...

Can anyone give me some idea about why this happen? And how to solve this
problem?

Thank you in advance.

Best Regards,
An Jiye