[vtkusers] what changes the coordinates?

[Petru Pau]

My program reads a vtkPolyData stored in a .vtk file and does some 
processing
with it. During a debug session, I looked at a point of the poly data: 
its coordinates
are not the ones read from the file! For instance, if the file has a 
value 1057.31,
the point in the program's data structure has 1057.3100585937500. This 
slight
modiffication occurs to most of the points.

Why?...

Petru