[Paraview] Structured Grid Blanking and Scalar Ranges

[Kent Eschenberg]

I dealt with the same issue in my custom readers by setting the blanked, 
invalid values to zero or something within the valid range.

Kent
Pittsburgh Supercomputing Center

Berk Geveci wrote:
> Hmmmm. Tricky. The right way of dealing with this is probably adding a
> ComputeRange() to vtkDataSet (that takes the array) and ask it to
> compute the range. Each sub-class could then take blanking into
> account. This would involve quite a few changes, I am afraid.
> 
> On 9/6/07, Sean Ziegeler <seanzig at users.sourceforge.net> wrote:
>> I'm working on a new reader that creates a vtkStructuredGrid and sets
>> the point visibility array for invalid values.  It works fine, except
>> that it doesn't affect the scalar ranges.  Looking at the code, I can
>> see that vtkPVArrayInformation does indeed not take the blanking array
>> into account for structured grids.  It also looks like changing that
>> behavior would be involved, as it processes each scalar array without
>> regard to its respective containing data set, so I'm not going to worry
>> about that just yet.
>>
>> Is there some other way to set the scalar range manually?
>>
>> Preferably in such a way that the manual range is maintained when passed
>> through filters, but that's probably a bit much to ask.
>>
>> I'm working with 3.1.0 right now, but I'm willing to switch to head if
>> necessary.
>>
>> Thanks,
>> Sean