Implement better openpmd metadata #24
Merged
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This PR implements a new
OpenPMDDataReaderclass which is derived from the originalDataReaderof theopenpmd-viewer.The derived class has been extended with a method for reading only the field metadata.
This class replaces the functionality of
_read_field_metadatain theOpenPMDFieldReader, which had some problems in determining some metadata attributes (particularly the axis arrays) because it didn't have access to theFieldMetaInformation. The new class has access to it and is able to provide the more complete metadata generated by theopenpmd-viewer.