[vtkusers] Problem with Data in VTK

Thu Sep 14 02:15:06 EDT 2017

Hi Jennifer,
what does your C:\VTK\VTKData directory contain? Have you built the VTKData
project? You must build that project so that the actual testing data files
are retrieved.

HTH,
JON HAITZ

--

On 14 September 2017 at 07:58, Jennifer Lee via vtkusers <vtkusers at vtk.org>
wrote:

> Hello,
>      Still I could not make it work. Setting VTK_DATA_ROOT to
> ‘C:\VTK\VTK-8.0.1\ExternalData\Testing’ didn’t work for me. It can’t find
> the data.
>
> I have separate source and build:
> Source is : C:\VTK\VTK-8.0.1
> Build is: C:\VTK\VTK-bin
> Data is: C:\VTK\VTKData
>
> As I also built with TESTING_ON; so, I’ve MD5 files under Testing
> directory. *C:\VTK\VTK-8.0.1\Testing.*
>
> I tried to run the tcl script Medical1.tcl. If I set the  data root to ‘
> *C:\VTK\VTK-8.0.1\Testing’*, it can’t find the data (I think because
> these are MD5 files). If I set the data root to *C:\VTK\VTKData*, it also
> does not work.
>
> I need help to fix the problem.
> Thanks!
>
> Regards,
> Jennifer
>
>
> On Wednesday, September 13, 2017 7:58 AM, David E DeMarle <
> dave.demarle at kitware.com> wrote:
>
>
> On Wed, Sep 13, 2017 at 2:12 AM, Jennifer Lee <lee_jennifer_82 at yahoo.com>
> wrote:
>
> Hello,
>    Thanks so much for the reply.
>
> Please ignore my poor knowledge. I’m really having trouble in
> understanding.
>
>
> No worries, this confuses lots of people including me.
>
>
> I’ve data in the following directory:
>
> C:\VTK\VTKData-8.0.1\VTK-8.0. 1\.ExternalData\MD5. Now, the files look
> like something below:
>
> 00b6935d399b80e4f9edc1414a4c36 3f
> 00ba7d9399c914edb4a6faa0b10ae7 e5
> 00d2efba0581fb7d436bcc45a9aced cb
> 00d49b1746f315992fac476892c681 ae
> :
> :
> :
> :
> I really don’t understand what they mean. It seems to me  these are some
> encrypted names which need to be decrypted. I don’t know how to do that.
>
>
> These are checksums of the real data files. Cmake and git know that they
> have to download a different file whenever the data file's checksum doesn't
> agree with the above.
>
>
> I built with TESTING_ON, now data are available in the “Testing” directory
> too. Suppose I’d like to run the Medical examples. Now, data is available
> in the following directory:
>
>
> *C:\VTK\VTK-8.0.1\Testing\Data\ headsq*
>
> With VTK_DATA_ROOT set to C:\VTK\VTK-8.0.1\Testing
>
> But these are all MD5 files. So the following line of the code does not
> find the data:
>
> *v16 SetFilePrefix  "$VTK_DATA_ROOT/Data/headsq/ quarter".*
>
> Please help me how to make things work. If I've missed any step, please
> let me know.
> Thanks in advance.
>
> Where is you build directory? I highly recommend always keeping your VTK
> source directory and your VTK build directory separate.
>
> Assuming you've built VTK in C:\VTK\VTK-8.0.1, try setting VTK_DATA_ROOT
> to C:\VTK\VTK-8.0.1\ExternalData\Testing. This is where the data file
> links are. The real data files are elsewhere in files with MD5 names, but
> for all intents and purposes the data link files that refer to them work as
> if they were the read data files.
>
>
>
> Regards,
> Jennifer
>
>
>
>
> On Tuesday, September 12, 2017 9:32 AM, David E DeMarle <
> dave.demarle at kitware.com> wrote:
>
>
> We changed the structure of regression test data in 6.1 to allow
> developers to make proposed changes to code and data concurrently and
> ensure that the continuous integration test machines do not fail when they
> run new tests on old data.
>
> The net result is that a VTK build tree has test data files that are
> actually symbolic links to the md5 files which live elsewhere. You can
> generally open and use the symbolic links exactly as you would a normal
> data file. If you turn on testing in your build, cmake will try to download
> each one of the files. Alternatively you can untar the source and data
> packages for a release in the same directory and the default build setup
> will use them and avoid downloading anything else.
>
>
>
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
> On Sat, Sep 9, 2017 at 7:43 PM, Jennifer Lee via vtkusers <
> vtkusers at vtk.org> wrote:
>
>   Hello,
>      I used VTK in 2013. After that, I installed VTK after more than 4
> years. I found some changes in Data in the latest version. How to make
> those MD5 files work? Please let me know. I didn't find much
> documentation. I'm really having problem with this.
>      Thanks in advance!
>
> Regards,
> Jennifer.
>
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