[vtkusers] vtkThreshold Problem

[Ambar C]

Hello,

I'm trying to use the vtkThreshold class to perform thresholding
operations on a data set. I want to extract each point that's a
certain distance away from a given mesh. However, I'm finding it tough
to figure out how to set the constraints that determine which points
get included and which don't.

The class docs make references to each point in the mesh having a
'scalar' value associated with it over which the thresholding happens.
Despite searching for a while, I couldn't find what these scalars
truly are, or how I could customize them to match the constraint
definitions I'd need.

Could someone explain the class usage? How are those scalars to be
used? Follow up questions welcome.

Best,
Ambar