[vtkusers] how to read UNSTRUCTURED_GRID?

[David Doria]

On Mon, Mar 15, 2010 at 11:19 AM, 이정규 <glazex2 at naver.com> wrote:

> Hi all,
>
> I am trying to parse a .VTK file with UNSTRUCTURED_GRID but this just have
> data of points.
> I've looked for more information for this but all I found is
>
> The Visualization Toolkit supports five different dataset formats:
>> structured points, structured grid, rectilinear
>
> grid, unstructured grid, and polygonal data. Data with implicit topology
>> (structured data such as vtkImageData and
>
> vtkStructuredGrid) are ordered with x increasing fastest, then y, then z.
>> These formats are as follows.
>
>
> So I guess somehow I have to infer the topology from these points. I've
> tried Paraview and it renders it as a set of rectangles(I've tired to render
> surface with wireframes and so on)..
> I see some hint there that points are ordered with x-ascending order, but
> how the index is consists up is not mentioned in any documents.....
> Anybody done this before? or have more information for this?
>
> PS : If you are someone at Kitware, would you please, please direct me to
> the right information?????
>
> --
> Jeonggyu Lee
>

Do you have an existing .vtk file that you need to read? If not, I would
suggest using the XML .vtu format - then you can use:

http://www.vtk.org/Wiki/VTK/Examples/IO/ReadUnstructuredGrid

Thanks,

David
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