The FillPartialArrays filter is a new feature that allows you to fill a partial attribute array with a value.
This filter uses the fillPartialAttributes function from the arrayModifier file. An update to the function allows you to choose the value to fill, defaults to nan.
Multiple attributes can be filled simultaneously with the same value. To fill two attributes with two values, the filter must be applied twice.
As part of the refactoring, the filter, FillPartialArrays, is present in geos-mesh and a Paraview plugin, PVFillPartialArrays, referencing the filter is present in geos-pv.