DAMASK_EICMD/processing/post/addPole.py

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#!/usr/bin/env python3
import os
import sys
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from io import StringIO
from optparse import OptionParser
import numpy as np
import damask
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName,damask.version])
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [ASCIItable(s)]', description = """
Add coordinates of stereographic projection of given direction (pole) in crystal frame.
""", version = scriptID)
parser.add_option('-p',
'--pole',
dest = 'pole',
type = 'float', nargs = 3, metavar = 'float float float',
help = 'crystal frame direction for pole figure [%default]')
parser.add_option('--polar',
dest = 'polar',
action = 'store_true',
help = 'output polar coordinates (r,φ) instead of Cartesian coordinates (x,y)')
parser.add_option('-o',
'--orientation',
dest = 'quaternion',
metavar = 'string',
help = 'label of crystal orientation given as unit quaternion [%default]')
parser.set_defaults(pole = (1.0,0.0,0.0),
quaternion = 'orientation',
)
(options, filenames) = parser.parse_args()
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if filenames == []: filenames = [None]
pole = np.array(options.pole)
pole /= np.linalg.norm(pole)
for name in filenames:
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damask.util.report(scriptName,name)
table = damask.Table.from_ASCII(StringIO(''.join(sys.stdin.read())) if name is None else name)
orientation = table.get(options.quaternion)
poles = np.empty((orientation.shape[0],2))
for i,o in enumerate(orientation):
rotatedPole = damask.Rotation(o)*pole # rotate pole according to crystal orientation
(x,y) = rotatedPole[0:2]/(1.+abs(pole[2])) # stereographic projection
poles[i] = [np.sqrt(x*x+y*y),np.arctan2(y,x)] if options.polar else [x,y] # cartesian coordinates
table.add('pole_{}{}{}'.format(*options.pole),
poles,
scriptID+' '+' '.join(sys.argv[1:]))
table.to_ASCII(sys.stdout if name is None else name)