[vtkusers] About the example--vtk for iOS VolumeRender

[Cory Quammen]

The VTK Nrrd reader may not be able to read compressed NRRD files. Try to
convert it to a non-compressed NRRD file by opening it in Slicer and then
saving it with the compression option turned off.

- Cory

On Wed, Nov 18, 2015 at 12:03 PM, 邓卓夫 <dzfowen at qq.com> wrote:

> Hi developers,
>
>     I try to build the latest vtk for iOS example VolumeRender, compiling
> is ok. However when I run the project with the data file CT-chest.nrrd
> which is downloaded from 3D slicer web and converted into 8 unsigned char
> and 256*256*130 format, the Xcode came out 2 errors:
>
>        *ERROR: In /Users/dzf/Desktop/VTK/IO/Image/vtkNrrdReader.cxx, line
> 337*
>
> *vtkNrrdReader (0x7f9e8b821370): CT-chest.nrrd is not a nrrd file.*
>
>
> *     ERROR: In
> /Users/dzf/Desktop/VTK/Common/ExecutionModel/vtkExecutive.cxx, line 784*
>
> *vtkCompositeDataPipeline (0x7f9e8b821e50): Algorithm
> vtkNrrdReader(0x7f9e8b821370) returned failure for request: vtkInformation
> (0x7f9e8b823530)*
>
> *  Debug: Off*
>
> *  Modified Time: 8501*
>
> *  Reference Count: 1*
>
> *  Registered Events: (none)*
>
> *  Request: REQUEST_INFORMATION*
>
> *  FORWARD_DIRECTION: 0*
>
> *  ALGORITHM_AFTER_FORWARD: 1*
>
>
> 1 error: why Xcode assumed that the file is not nrrd file, it is strange
> maybe I had mistakes to convert the original nrrd file into proper one with
> 3d Slicer?
>
>
> 2 error:I can not understand.
>
>
> Thanks for your reply!
>
>
>   Bob
>
>
>
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-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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