[Paraview] RegionIDs cannot be 0 while using Catalyst

[谢茂金]

Hi, all

When using Catalyst for Live Data Visualization, I get an error for each frame as follows,

ERROR: In /path/to/paraview-4.0.0-RC2/source/directory/ParaViewCore/VTKExtensions/Rendering/vtkKdTreeGenerator.cxx, line 172
vtkKdTreeGenerator (0x71c3dc0) : RegionIDs cannot be 0.

Both the paraview and the simulation processer are not crash and get four sub-images with four processors, but sub images are not composited as what I've expected.
The whole volume is of size (nx*2, ny*2, nz), and devide into four sub volumes. When creating the volume data, I use the following piece of code to set the grid, where nx, ny, nz are the size of current sub volume, and nxstart, nystart, nzstart are the starting grid of current sub volume. 

 33   vtkSmartPointer<vtkImageData> grid = vtkSmartPointer<vtkImageData>::New();
 34 
 35   grid->SetExtent(*nxstart, *nxstart+*nx-1, *nystart, *nystart+*ny-1, *nzstart, *nzstart+*nz-1);
 36 
 37   // Name should be consistent between here, Fortran and Python client script.
 38   vtkCPPythonAdaptorAPI::GetCoProcessorData()->GetInputDescriptionByName("input")->SetGrid(grid);
 39   vtkCPPythonAdaptorAPI::GetCoProcessorData()->GetInputDescriptionByName("input")->SetWholeExtent(0, *nx*2-1, 0, *ny*2-1, 0, *nz-1);

So I think I may lost some key steps to specify the proper kdtree region ids, but I havn't found out how to configure it.

Any ideas? Thanks in advance.






Maojin XIE
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