[Paraview] Getting Z Boundaries Correct on Custom Reader

[Burlen]

In so far as I understand, the origin is the location of the lower left 
corner of the cell indexed at 0,0,0. You have requested extent 490-491, 
so bounds should be: 0.0+490*1.2 to 0.0+491*1.2 or 588 to 589.


Mike Jackson wrote:
> I have a custom reader that I am updating and all is going well
> (thanks to all for help earlier) but I am having a problem
> understanding how some values are computed.
>
> When I load my data set and I look in the "Information" tab the X and
> Y boundaries are correct but the z boundary is not correct. In fact it
> is off by the z origin multiplied by the z spacing which I find odd
> because the X & Y origins are correct. Even if I set a z origin to
> Zero.
>
> Some output from my reader:
>
> MicronOriginVoi: 46979.1 48347.6
> MicronSizeVoi: 1545.97 1731.28
> CurrentScalingFactor: 0.207987 0.207987 1.2
> PixelVOI: 0 7432 0 8322 490 491
> PixelActual: 0 7440 0 8330 490 727
> requestedExtent: 0 7432 0 8322 490 491
>
> And I setup the vtkImageData like this:
> output->SetSpacing(this->CurrentScalingFactor);
> output->SetOrigin(this->MicronOriginVoi[0], this->MicronOriginVoi[1], 0.0 );
> output->SetScalarType(VTK_TYPE_UINT8);
> output->SetExtent(requestedExtent);
> output->SetNumberOfScalarComponents( 1 );
> output->AllocateScalars();
> output->GetPointData()->GetScalars()->SetName("RoboMet Voxels");
> output->GetPointData()->SetActiveScalars("RoboMet Voxels");
>
> At this point the "Information" tab shows a Z Bounds of 588 to 589
> (Delta 1.2). So the delta is correct but not the bounds. Also during
> the RequestInformation method I have the following code:
>
> double origin[3] = { this->MicronOriginVoi[0], this->MicronOriginVoi[1], 0.0  };
> outInfo->Set( vtkDataObject::ORIGIN(), origin, 3 );
>
> I am not really sure what I am doing wrong at this point.
>
> _________________________________________________________
> Mike Jackson                               mike.jackson at bluequartz.net
> BlueQuartz Software                    www.bluequartz.net
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://www.paraview.org/mailman/listinfo/paraview
>