61 lines
1.9 KiB
Python
Executable File
61 lines
1.9 KiB
Python
Executable File
#!/usr/bin/env python3
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import os
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import sys
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from io import StringIO
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from optparse import OptionParser
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import numpy as np
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import damask
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scriptName = os.path.splitext(os.path.basename(__file__))[0]
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scriptID = ' '.join([scriptName,damask.version])
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# --------------------------------------------------------------------
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# MAIN
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# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [ASCIItable(s)]', description = """
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Add column(s) containing eigenvalues and eigenvectors of requested symmetric tensor column(s).
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""", version = scriptID)
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parser.add_option('-t','--tensor',
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dest = 'tensor',
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action = 'extend', metavar = '<string LIST>',
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help = 'heading of columns containing tensor field values')
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parser.add_option('--no-check',
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dest = 'rh',
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action = 'store_false',
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help = 'skip check for right-handed eigenvector basis')
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parser.set_defaults(rh = True,
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)
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(options,filenames) = parser.parse_args()
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if filenames == []: filenames = [None]
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for name in filenames:
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damask.util.report(scriptName,name)
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table = damask.Table.from_ASCII(StringIO(''.join(sys.stdin.read())) if name is None else name)
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for tensor in options.tensor:
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t = table.get(tensor).reshape(-1,3,3)
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(u,v) = np.linalg.eigh(damask.mechanics.symmetric(t))
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if options.rh: v[np.linalg.det(v) < 0.0,:,2] *= -1.0
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for i,o in enumerate(['Min','Mid','Max']):
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table.add('eigval{}({})'.format(o,tensor),u[:,i],
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scriptID+' '+' '.join(sys.argv[1:]))
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for i,o in enumerate(['Min','Mid','Max']):
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table.add('eigvec{}({})'.format(o,tensor),v[:,:,i],
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scriptID+' '+' '.join(sys.argv[1:]))
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table.to_ASCII(sys.stdout if name is None else name)
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