[vtkusers] vtkStructuredPointsWriter writes a blank file

[Matheus Viana]

Dear David,

I tried to use XMLImageDataWriter and it seems to be working. However, the
original VTK file that has 2Gb is then saved as a vti file that has only
10Mb. I think this is fine because my data is very sparse with a lot of
zeros. I can make sure that it is working well because Paraview crashes
when I tried to load the file. I'll check it again later on. Anyway, do you
think the bug is in the StructuredPointsWriter?

Bill, I tried to not specify the data extent, but in this case the reader
reads only the first image of the sequence. Is there anything else I have
to set up?

*Matheus Viana*
*Postdoctoral Research Employee*
*Developmental and Cell Biology*
*University of California Irvine*




2014-06-19 14:20 GMT-03:00 Bill Lorensen <bill.lorensen at gmail.com>:

> The data extents you specified will produce a zero length structured
> points.
>
> For the tiff reader, you need not specify the extents if you want all
> of the data. And I'm not sure what the other methods will do in the
> tiff reader.
> vtkTIFFReader *TIFFReader = vtkTIFFReader::New();
>     TIFFReader -> SetFilePrefix("/Users/matheusviana/Desktop/images/im");
>     TIFFReader -> SetFilePattern("%s%04d.tif");
>     TIFFReader -> Update();
>
> On Thu, Jun 19, 2014 at 8:14 AM, matheus_viana <vianamp at gmail.com> wrote:
> > Guys, I'd like to know if there is any error in this code below. The code
> > works fine for small size dataset, but it writes a blank file when the
> > dataset has more than 2Gb. I'm working on 64bit OSX.
> >
> > Thanks a lot.
> >
> > int main() {
> >     vtkTIFFReader *TIFFReader = vtkTIFFReader::New();
> >     TIFFReader -> SetDataByteOrderToBigEndian();
> >     TIFFReader -> SetDataExtent(0,0,0,0,0,3959);
> >     TIFFReader -> SetFilePrefix("/Users/matheusviana/Desktop/images/im");
> >     TIFFReader -> SetFilePattern("%s%04d.tif");
> >     TIFFReader -> SetDataScalarTypeToUnsignedShort();
> >     TIFFReader -> Update();
> >
> >     vtkStructuredPointsWriter *ImageDataWriter =
> > vtkStructuredPointsWriter::New();
> >     ImageDataWriter -> SetFileType(VTK_BINARY);
> >     ImageDataWriter -> SetInput(TIFFReader -> GetOutput());
> >     ImageDataWriter -> SetFileName("Result.vtk");
> >     ImageDataWriter -> Write();
> >
> >     return 1;
> > }
> >
> >
> >
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