DAMASK_EICMD/processing/post/vtk_rectilinearGrid.py

126 lines
4.6 KiB
Python
Executable File

#!/usr/bin/env python
# -*- coding: UTF-8 no BOM -*-
import os,sys,vtk
import numpy as np
from optparse import OptionParser
import damask
scriptID = '$Id$'
scriptName = os.path.splitext(scriptID.split()[1])[0]
# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [file[s]]', description = """
Create regular voxel grid from points in an ASCIItable.
""", version = scriptID)
parser.add_option('-m', '--mode',
dest = 'mode',
type = 'choice', choices = ['cell','point'],
help = 'cell-centered or point-centered coordinates ')
parser.add_option('-p', '--positions',
dest = 'position',
type = 'string', metavar = 'string',
help = 'coordinate label [%default]')
parser.set_defaults(position = 'pos',
)
(options, filenames) = parser.parse_args()
if not options.mode: parser.error("No coordinate type specified.")
# --- loop over input files -------------------------------------------------------------------------
if filenames == []: filenames = [None]
for name in filenames:
try:
table = damask.ASCIItable(name = name,
buffered = False, readonly = True)
except: continue
damask.util.croak(damask.util.emph(scriptName)+(': '+name if name else ''))
# --- interpret header ----------------------------------------------------------------------------
table.head_read()
# ------------------------------------------ sanity checks ----------------------------------------
errors = []
remarks = []
if table.label_dimension(options.position) != 3: errors.append('coordinates {} are not a vector.'.format(options.position))
if remarks != []: damask.util.croak(remarks)
if errors != []:
damask.util.croak(errors)
table.close(dismiss = True)
continue
# --------------- figure out size and grid ---------------------------------------------------------
table.data_readArray(options.position)
coords = [np.unique(table.data[:,i]) for i in xrange(3)]
if options.mode == 'cell':
coords = [0.5 * np.array([3.0 * coords[i][0] - coords[i][0 + len(coords[i]) > 1]] + \
[coords[i][j-1] + coords[i][j] for j in xrange(1,len(coords[i]))] + \
[3.0 * coords[i][-1] - coords[i][-1 - (len(coords[i]) > 1)]]) for i in xrange(3)]
grid = np.array(map(len,coords),'i')
N = grid.prod() if options.mode == 'point' else (grid-1).prod()
if N != len(table.data): errors.append('data count {} does not match grid {}x{}x{}.'.format(N,*(grid - options.mode == 'cell') ))
if errors != []:
damask.util.croak(errors)
table.close(dismiss = True)
continue
# ------------------------------------------ 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])
damask.util.croak('{} points and {} cells...'.format(rGrid.GetNumberOfPoints(),rGrid.GetNumberOfCells(),))
# ------------------------------------------ output result ---------------------------------------
if name:
(dir,filename) = os.path.split(name)
writer = vtk.vtkXMLRectilinearGridWriter()
writer.SetDataModeToBinary()
writer.SetCompressorTypeToZLib()
writer.SetFileName(os.path.join(dir,os.path.splitext(filename)[0]+'_{}'.format(options.position) \
+'.'+writer.GetDefaultFileExtension()))
if vtk.VTK_MAJOR_VERSION <= 5: writer.SetInput(rGrid)
else: writer.SetInputData(rGrid)
writer.Write()
else:
writer = vtk.vtkRectilinearGridWriter()
writer.WriteToOutputStringOn()
writer.SetFileTypeToASCII()
writer.SetHeader('# powered by '+scriptID)
if vtk.VTK_MAJOR_VERSION <= 5: writer.SetInput(rGrid)
else: writer.SetInputData(rGrid)
writer.Write()
sys.stdout.write(writer.GetOutputString()[0:writer.GetOutputStringLength()])
table.close() # close input ASCII table