[vtkusers] ActiViz Points of Polydata in mm or pixels?

[David Cole]

The points are actually in "world" coordinates, and are typically 
passed through from the original source of the data, unless it's scaled 
or transformed by something in the pipeline along the way.

Your original data must in millimeters if the output of the code you 
sent is also in millimeters, ... but VTK is typically "units agnostic", 
and the world coordinate systems vary from application to application.


HTH,
David C.