[vtkusers] How to read POINTS with double precision in a vtk data file ?

[Sophie BOUDAUD]

Hi vtkusers,

I want to read POINTS in a vtk data file with double precision, sadly 
POINTS values are truncated.
Can someone explain me what is wrong with my program ?

I'm working on Windows and I'm using TclPro1.4 and VTK4.2. 
My reading VTK file is : 

# vtk DataFile Version 3.0 

ASCII 
DATASET UNSTRUCTURED_GRID 
POINTS  37466 double 
   -0.1214999924E+03    -0.3000000000E+03     0.8236390114E+01 
   -0.1214999847E+03    -0.3000000000E+03     0.1123638916E+02 
....
CELLS    69889  378041 
 1 597 
 1 598 
... 
CELL_TYPES      69889 
       1 
       1 
... 
CELL_DATA  69889 
SCALARS MATERIAL float 
LOOKUP_TABLE default 
       1 
       1 
... 
SCALARS GROUP float 
LOOKUP_TABLE default 
       1 
       1 
... 

I'm using vtkUnstructuredGridReader  to  read my VTK file : 
                vtkUnstructuredGridReader Ureader 
                        Ureader SetFileName $file 

A vtkUnstructuredGrid object is created to insert or delete points or 
cells : 
                vtkUnstructuredGrid usgModel 
                        usgModel ShallowCopy [Ureader GetOutput] 

To get the value of the first point :  set coord(0) [usgModel GetPoint 0]
The coordinates are :  -121.5 -300 8.23639  !!!!



Best regards,

Sophie

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