[Paraview] Query about TableToStructuredGrid filter

[Utkarsh Ayachit]

Lester,

Sorry for the late reply.

I was able to load your attached dataset without any issues with the
following property values for the TableToStructuredGrid filter:

Whole Extent (0, 140), (0, 151), (0, 2)
X Column: X
Y Column: Y
Z Column: Z

Utkarsh

On Fri, Jul 24, 2009 at 6:54 AM, Lester Anderson
<lester_anderson1963 at hotmail.com> wrote:
> Hi Utkarsh
>
> Thanks for the info, I can now see how it works from your sample file. I did
> have to re-order the entries in my test CSV file in order to get it plotting
> as a cube and not as a distorted one (with the original format). It does
> appear that the Table to Structured Grid expects the CSV data to be in a
> particular order, but it does not seem to be able to handle data values
> entered in effect randomly, even though the positional information (XYZ) is
> explicit.
>
> I did apply a quick test on some real data, a few sampled layers as the
> whole data are quite chunky! Even though I enter the extents of the data
> properly, it fails with the the same error message. I have attached a zipped
> data file for you to see, it is only 3 data layers (z=0, -100, -200), with
> the units in metres (XYZ).
>
> X: 291000 - 321000
> Y: 2026000 - 2056000
> Z: -200 - 0 (negative to get depth in the right direction!)
>
> I already have the whole dataset as a VTK file (thanks to Berk's help), but
> this is a useful test of real-world data. The whole dataset forms a volume
> 30km x 30km x 10km (XYZ) so pretty big!
>
> If you can work out why it is not working on the Table to structure grid,
> that would be a great help. Table to points is perfectly fine with the
> extents exactly as expected. As longs as the data are on a regular grid,
> then Paraview should be able to convert this to a structured grid
> irrespective of the order of the data points. Perhaps it would be useful to
> have some clarification on the way Paraview processes the data and whether
> or not we are expected to preformat the input CSV file.
>
> Thanks
>
> Lester
>
>
>> Date: Thu, 23 Jul 2009 15:23:51 -0400
>> Subject: Re: [Paraview] Query about TableToStructuredGrid filter
>> From: utkarsh.ayachit at kitware.com
>> To: lester_anderson1963 at hotmail.com
>> CC: paraview at paraview.org
>>
>> Attached is a sample csv file.
>> Since the CSV file has 8 points, we can create a grid with extents
>> (2x2x2). Hence set the Whole Extent on the "Table To Structured Grid"
>> filter to be (0, 1, 0, 1, 0, 1). Then choose the columns to use for
>> the point coordinates and hit apply.
>>
>> I guessing what you are missing is setting of the "Whole Extent" on the
>> panel.
>>
>> Utkarsh
>>
>> On Thu, Jul 23, 2009 at 11:25 AM, Lester
>> Anderson<lester_anderson1963 at hotmail.com> wrote:
>> > Hello
>> >
>> > It is good to see that there is now CSV import functionality, which
>> > works
>> > fine for displaying points (e.g. using Glyphs), but if you want to do
>> > more
>> > interesting work, you need a structured grid. The option to take the
>> > loaded
>> > CSV data and convert it to a Structured Grid is listed (Table to
>> > Structure
>> > Grid). However, this always fails with the same error message (Windows
>> > XP
>> > and Vista)
>> >
>> > ERROR: In ..\..\..\src\VTK\Graphics\vtkTableToStructuredGrid.cxx, line
>> > 98
>> > vtkPTableToStructuredGrid (0A195768): The input table must have exactly
>> > 1
>> > rows. Currently it has 8 rows.
>> >
>> >
>> > ERROR: In ..\..\..\src\VTK\Filtering\vtkExecutive.cxx, line 757
>> > vtkCompositeDataPipeline (0A1952A0): Algorithm
>> > vtkPTableToStructuredGrid(0A195768) returned failure for request:
>> > vtkInformation (09987D80)
>> > Debug: Off
>> > Modified Time: 9473124
>> > Reference Count: 1
>> > Registered Events: (none)
>> > Request: REQUEST_DATA
>> > FORWARD_DIRECTION: 0
>> > ALGORITHM_AFTER_FORWARD: 1
>> > FROM_OUTPUT_PORT: 0
>> >
>> > I have tested this on a multilayer volume and it fails as above: the
>> > Table
>> > to Points always works. What we want is to have Paraview
>> > interpolate the data between the points such that a volume can be sliced
>> > etc. Is there a problem with this option?
>> >
>> > Lester
>> >
>> >
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