Problem with vtkMarchingCubes - no isosurface

[Brent Burton]

Hello again, all.

I found the problem described in my earlier email.  The values in the
pipeline are integer values from 0 to 255, not float values.

When debugging VTK I noticed the data type was VTK_UNSIGNED_CHAR,
but I was thrown by the vtkStructuredPointsWriter writing out
float values.

Once I changed my marching cubes threshold value from 0.627
to 160, it worked as desired.

Sorry to clot the list with this oversight.

-Brent Burton




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