All,
I'm trying to retrieve the block names for blocks in an Exodus multi-block
dataset. There is a weird block_ID, block_number thing which I don't
understand and can't get past.
Imagine I have many blocks in my dataset but I only load 2
Block_ID block_number(displayed in Spreadsheet)
4 5 - this is
actually 4th block in file
101 25 - this is actually
24th block in file
I am looping through blocks and getting block_names using this routine:
def get_block_name(block):
#
# Get block ID - indexed from 1
block_id=block.FieldData.GetArray('ElementBlockIds')
#print block_id
#
# Get Block name from metadata
output=self.GetOutput()
#
# Element Block data is in DataBlock(0) of composite database
ElementBlocks=output.GetBlock(0)
#
# meta indexed from 0 (use block_id-1)
block_meta=ElementBlocks.GetMetaData(block_id-1)
block_name=block_meta.Get(vtk.vtkCompositeDataSet.NAME())
return block_name
Note that block.FieldData.GetArray('ElementBlockIds') returns 5 for the first
block
I then need to call block_meta.Get(vtk.vtkCompositeDataSet.NAME()) with 4 to
get the correct name
Now with the second block, block.FieldData.GetArray('ElementBlockIds') returns
101,
I then call block_meta.Get(vtk.vtkCompositeDataSet.NAME()) with 100 and get an
error of "NoneType object has no attribute 'Get'
It seems clear that I need a function which will return 25 for the second block
(instead of 101) so that I can call NAME() with 24.
So, how do I get it to return the block number instead of the block ID
NOTE, the first block is a hex block, while the 2nd block is a quad block -
I'm suspicious that this is the real issue, but here all quad blocks are > 100
by convention.
Summary - block name works for contiguously numbered hex blocks but
discontinuously numbered quad blocks don't work.
Thanks for any help.
Dennis
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