VTK::IOCellGrid

This module contains a reader and writer for vtkCellGrid data that uses human-readable JSON and/or binary MessagePack as the on-disk format.

Both the reader and writer classes use the vtkCellGridIOQuery to accomplish their work. This query can be set to serialize data to or deserialize data from an nlohmann::json object, which is in turn written to or read from disk. Note that this query is used by the VTK::IOLegacy module as well – it embeds MessagePack-formatted data for cell-grids into the existing legacy VTK file format.

A query responder, vtkDGIOResponder, is provided to process cell grids containing vtkDGCell instances. If you add a new type of cell, you should register your own responder to the vtkCellGridIOQuery class; once you do, your new cell type will be supported for I/O. Additionally, because ParaView uses the VTK::IOLegacy module to transfer data between a client and rank-0 server processes, adding an I/O responder for your new cell type will enable client-side rendering of remote data in ParaView.