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Utkarsh Ayachit authored
Fixed BUG #1411. Surface selection was failing in parallel since there was mismatch between the client and server processes when deciding whether they needed to render additional passes for the ID. The additional passes are required when the max-id of the elements per node are greater than 0xffffff. Added logic to synchronize the element count among all processes right after the first selection-pass so that the subsequent passes can make the correct decision on all processes invovled. Extended vtkPVSynchronizedRenderWindows to allow reduction operations with MIN, MAX and SUM (previously, we only supported sum). Change-Id: I9ddd43a80acdec7d1dd1d9cd98b3d138f1577f20
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