Draft: Adds vtkPartitionedDataSetCollectionMapper

WIP

Create new Mapper for vtkPartitionedDataSetCollection

Issue: paraview/paraview#20126 (closed)

Notes from the meeting on Mon Nov 16th 1pm:

• Needed for PV 5.10
• One month timeline (Till Dec 16th)

Background

• We are deprecating vtkMultiBlockDataSet for many reasons.

• Current vtkPartitionedDataSetCollection

  • It has a vtkDataAssembly
    • Logical tree like structure of items in the collection
  • Inside is contains a vector of PartitionedDataSet

• Current vtkDataAssembly

  • Its the glue to keep hierarchies lost when transitioning from vtkMultiBlockDataSet.
  • Abstraction of a Tree
  • Stores indices to the data collection.

Ideas

• Path expressions for Properties

  • This new mapper traverse the vtkDataAssembly and renders it

• We must add ability to set visual properties on vtkPartitionedDataSetCollection:

  • One path to add them in the vtkDataAssembly:
    • We chose this one
  • Another, to add them directly in the mapper:

Proposal

EDITED Dec 9th 20

Follow up

• Propose new design.
• Announce new API in Discourse
• Implement vtkPartitionedDataSetCollectionMapper
• Add support for Attributes using XPath
• Implement vtkDataAssemblyPolyDataMapper
• Implement other mappers ...