[vtkusers] Getting LUT with nuances

[Romain CENDRE]

Hi again, 
Yesterday I learn that you have defined LUT in VTK ( thanks for this tutorial : http://www.vtk.org/Wiki/VTK/Examples/Cxx/Utilities/LUTUtilities) 
In my simple test app, I give the choice of the lut in a Combobox. 
I would like to apply these lut next to my mapper, so I proceed like this: 

///Previous operations made 
m_lut->SetNumberOfTableValues(width*height); 
m_mapper->SetScalarRange(minZ, maxZ); 
m_lut->Build(); 

//When i set a new LUT 
m_colorSeries->SetColorScheme(choiceLutIndex); 
m_colorSeries->BuildLookupTable(m_lut); 
m_lut->IndexedLookupOff(); 
m_mapper->SetLookupTable(m_lut); 
m_scalarBar->SetLookupTable(m_lut); 

When I do this operation I will get a new LUT, but compare to my previous LUT with 1280 colors I get a LUT of 6 colors. 

I don't know if exist a way to interpolate a value and not taking the nearest index? 

Best regards 
Romain 

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