[Paraview] proper formatting of 2D data

[Burlen Loring]

Hi Robert,

Good one! The slice rep uses GPU textures and this behavior looks a bug 
in the logic that sets up the texture. You should file a bug report.

There's an easy workaround. Convert to a positive spacing and adjust the 
origin accordinigly. The data will the occupy the same region. Here's 
how your file looks then:

--8<--
# vtk DataFile Version 2.0
testing
ASCII
DATASET STRUCTURED_POINTS
DIMENSIONS 3 4 1
ORIGIN 0.0 -2.25 0.0
SPACING 0.5 0.75 1.0
POINT_DATA 12
SCALARS test float
LOOKUP_TABLE default
0.0
1.0
2.0
1.0
2.0
3.0
2.0
3.0
4.0
3.0
4.0
5.0
-->8--

Burlen

On 09/18/2014 11:56 PM, Robert-Zoltan Szasz wrote:
> Hi,
>
> I tried to visualize 2D structured point data when I observed a 
> strange behavior. If the spacing in Y direction is negative, the data 
> is flipped upside-down in 'Slice' representation mode but shown 
> properly as a  'Surface' representation. Tried in v. 4.0.1 and 4.2rc1 
> on Linux 64 bit. Here is a small VTK file to test:
>
> --8<--
> # vtk DataFile Version 2.0
> testing
> ASCII
> DATASET STRUCTURED_POINTS
> DIMENSIONS 3 4 1
> ORIGIN 0.0 0.0 0.0
> SPACING 0.5 -0.75 1.0
> POINT_DATA 12
> SCALARS test float
> LOOKUP_TABLE default
> 0.0
> 1.0
> 2.0
> 1.0
> 2.0
> 3.0
> 2.0
> 3.0
> 4.0
> 3.0
> 4.0
> 5.0
> -->8--
>
> I am wondering if I missed something when formatting the file or if 
> you have any ideas how to avoid this behavior?
> Thanks,
> Robert
>