[vtkusers] scalars from PointData

[Philippe Pouletaut]

Hi all,

I'm using vtk4.2 in c++ for color mapping.
I actually use the ElevationFilter and would like to copy the output of 
distance map into a float array.

The distance data are stored in a DataSet object called colorIt, with 
the scalars name "Elevation".
The method colorIt->GetInput()->GetPointData()->GetScalars() returns a 
DataArray object.
If I write:
 vtkDataArray *DistScalars = 
colorIt->GetInput()->GetPointData()->GetScalars();
I get memory problem.
If I write
 float *FirstValue = 
colorIt->GetInput()->GetPointData()->GetScalars()->GetTuple(0);
the same problem occurs.

How does I read the scalars "Elevation" ?

Many thanks for your help

Philippe