Reading Unstructured Grid File

[Will Schroeder]

Hi Thomas -

There are no inherent memory limits. I've successfully read grids of 10's of millions of cells.

If you are using vtkUnstructuredGridWriter to write binary files, an error crept into
the code that causes seg faults when reading binary vtk unstructured grid files. This
was fixed in the last couple of weeks, and is available in the nightly release.

However, this probably isn't the problem. More likely the "CELLS" keyword, and the data
associated with it (CELLS n size) is wrong (n being number of cells, size being the size of
the connectivity array), or the connectivity array does not include the count plus connectivity.

Will

At 11:15 AM 5/23/00 +0200, you wrote:
>Hello,
>
>I´m quiet new to vtk.
>My first goal is to visualize unstructured grids coming from a grid
>generator. Therefore, I was writing a converter for the file formats of the
>grid generator to vtk. When trying to read the unstructured grid set, reading
>of points seems to be ok, but reading of the connectivities ("Cells"
>keyword) fails at a certain point with memory fault. The grid consists of
>about 40000 points and 20000 cells. When I set the number of points to a
>much smaller value, reading is ok, but at more than about 3000 cells, the error
>occurs.
>Is there any limitation to memory usage in vtk or what could be the reason for
>this behaviour?
>
>Mit freundlichen Grüßen / Best regards
>
>##############################################################
>#                     Thomas Wolfanger                       #
>#                  Turbo-Lufttechnik GmbH                    #
>#                    t.wolfanger at tlt.de                      #
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