[Paraview] Rendering bug with UInt8 data

[Utkarsh Ayachit]

Ethan,

Just check "Map scalars" property on the "Properties panel after
you've loaded the uint8_only dataset. The problem is that when
ParaView sees uint8 data, it treats that as colors and doesn't use the
color transfer function by default -- as that is generally what the
users want.

Hope that helps.

Utkarsh

On Wed, May 14, 2014 at 9:39 AM, Utkarsh Ayachit
<utkarsh.ayachit at kitware.com> wrote:
> A example file would be great. Thanks.
>
> On Wed, May 14, 2014 at 9:01 AM, Ethan Hereth <e.a.hereth at gmail.com> wrote:
>> Good day everyone,
>>
>> I think I have found a bug in the way Paraview renders UInt8 data. I am
>> writing out an octree structure with some cell data associated with it. Some
>> of the cell data is Int32 but one set of the cell data is UInt8. If I export
>> the UInt8 data with any of the other Int32 data Paraview seems to render the
>> octree as expected. But, if I export ONLY the UInt8 cell data Paraview's
>> rendering gets messed up; when I open the file everything is rendered dark
>> black. It should be noted, perhaps, that the 'Volume' rendering type does
>> seem to work in this case but all others do not and Paraview does know the
>> range of the data correctly. The VTK cell type is 11/VTK_VOXEL and the files
>> are (p)vtu files. I've seen this behavior in both Paraview 4.1.0 as well as
>> Paraview 3.98.0.
>>
>> I can provide a couple files that demonstrate this behavior if necessary.
>>
>> Thanks for a great product...
>>
>> Cheers,
>>
>> --
>> Ethan Alan Hereth
>>
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