[vtkusers] vtkVariant to double

[kwayeke]

I am using vtkArray which has a value of vtkVariant. How do I get a double
value?  I want to iterate over this array to get the value at each point
snip
------------------------------------------------------------------------------------------
vtkVariant vtkArray::GetVariantValue ( CoordinateT  i,CoordinateT  
j,CoordinateT  k	 ) 
--------------------------------------------------------------------------------------------

Many thanks for your help
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