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ExtractSelection GhostArray

Stephen Hogarth requested to merge shogarth/vtk:preserve_topology_ghostarray into master

Extended the GhostArray feature to allow multiple selection filters to hide cells using ghost arrays, and to also be stacked in sequence.

  1. Adds the ability to generate a ghost array from an extraction filter. This allows for a significant performance improvement in regular selection filtering by generating a ghost array from the selection, which can be used by another filter later in the pipeline to do the filtering. This reduces the number of data copies thoughout the pipeline.
  2. Adds ghost array filtering to cutting planes for unstructured grids.

Note: This is a continuation of !9553, switching to ghostarrays instead of using the PreserveTopology feature.

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