Is it possible to define different unstructured grids that share the same Points, without having to write the points in each file? This is supposing only one time-step.
I imagine that vtkMultiPieceDataSet should do so, but I don’t know how to write that in an XML file. A vtkMultiBlockDataSet groups together the unstructured grids, but the Points are always repeated, wasting space.
Furthermore, if the points are the same during different time-steps, can all of the unstructured grids of each time-step reference the same Points?