DAMASK_EICMD/processing/post/vtk_rectilinearGrid.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 vtk
import numpy as np
import damask
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName,damask.version])
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [ASCIItable(s)]', description = """
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Create regular voxel grid from points in an ASCIItable.
""", version = scriptID)
parser.add_option('-m',
'--mode',
dest = 'mode',
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metavar='string',
type = 'choice', choices = ['cell','point'],
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help = 'cell-centered or point-centered coordinates')
parser.add_option('-p',
'--pos', '--position',
dest = 'pos',
type = 'string', metavar = 'string',
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help = 'label of coordinates [%default]')
parser.set_defaults(mode = 'cell',
pos = 'pos',
)
(options, filenames) = parser.parse_args()
if filenames == []: filenames = [None]
for name in filenames:
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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coords = [np.unique(table.get(options.pos)[:,i]) for i in range(3)]
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if options.mode == 'cell':
coords = [0.5 * np.array([3.0 * coords[i][0] - coords[i][0 + int(len(coords[i]) > 1)]] + \
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[coords[i][j-1] + coords[i][j] for j in range(1,len(coords[i]))] + \
[3.0 * coords[i][-1] - coords[i][-1 - int(len(coords[i]) > 1)]]) for i in range(3)]
grid = np.array(list(map(len,coords)),'i')
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N = grid.prod() if options.mode == 'point' else (grid-1).prod()
# ------------------------------------------ process data ---------------------------------------
rGrid = vtk.vtkRectilinearGrid()
coordArray = [vtk.vtkDoubleArray(),
vtk.vtkDoubleArray(),
vtk.vtkDoubleArray(),
]
rGrid.SetDimensions(*grid)
for i,points in enumerate(coords):
for point in points:
coordArray[i].InsertNextValue(point)
rGrid.SetXCoordinates(coordArray[0])
rGrid.SetYCoordinates(coordArray[1])
rGrid.SetZCoordinates(coordArray[2])
# ------------------------------------------ output result ---------------------------------------
if name:
writer = vtk.vtkXMLRectilinearGridWriter()
writer.SetCompressorTypeToZLib()
writer.SetDataModeToBinary()
writer.SetFileName(os.path.join(os.path.split(name)[0],
os.path.splitext(os.path.split(name)[1])[0] +
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'_{}({})'.format(options.pos, options.mode) +
'.' + writer.GetDefaultFileExtension()))
else:
writer = vtk.vtkDataSetWriter()
writer.SetHeader('# powered by '+scriptID)
writer.WriteToOutputStringOn()
writer.SetInputData(rGrid)
writer.Write()
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if name is None: sys.stdout.write(writer.GetOutputString())