DAMASK_EICMD/processing/post/vtk_pointcloud.py

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#!/usr/bin/env python2.7
# -*- coding: UTF-8 no BOM -*-
import os,sys,vtk
import numpy as np
import damask
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from optparse import OptionParser
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName,damask.version])
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# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
parser = OptionParser(option_class=damask.extendableOption, usage='%prog options [file[s]]', description = """
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Produce a VTK point cloud dataset based on coordinates given in an ASCIItable.
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""", version = scriptID)
parser.add_option('-p',
'--pos', '--position',
dest = 'pos',
type = 'string', metavar = 'string',
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help = 'label of coordinates [%default]')
parser.set_defaults(pos = 'pos',
)
(options, filenames) = parser.parse_args()
# --- 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.report(scriptName,name)
# --- interpret header ----------------------------------------------------------------------------
table.head_read()
errors = []
remarks = []
coordDim = table.label_dimension(options.pos)
if not 3 >= coordDim >= 1: errors.append('coordinates "{}" need to have one, two, or three dimensions.'.format(options.pos))
elif coordDim < 3: remarks.append('appending {} dimension{} to coordinates "{}"...'.format(3-coordDim,
's' if coordDim < 2 else '',
options.pos))
if remarks != []: damask.util.croak(remarks)
if errors != []:
damask.util.croak(errors)
table.close(dismiss=True)
continue
# ------------------------------------------ process data ---------------------------------------
table.data_readArray(options.pos)
if len(table.data.shape) < 2: table.data.shape += (1,) # expand to 2D shape
if table.data.shape[1] < 3:
table.data = np.hstack((table.data,
np.zeros((table.data.shape[0],
3-table.data.shape[1]),dtype='f'))) # fill coords up to 3D with zeros
Polydata = vtk.vtkPolyData()
Points = vtk.vtkPoints()
Vertices = vtk.vtkCellArray()
for p in table.data:
pointID = Points.InsertNextPoint(p)
Vertices.InsertNextCell(1)
Vertices.InsertCellPoint(pointID)
Polydata.SetPoints(Points)
Polydata.SetVerts(Vertices)
Polydata.Modified()
if vtk.VTK_MAJOR_VERSION <= 5: Polydata.Update()
# ------------------------------------------ output result ---------------------------------------
if name:
writer = vtk.vtkXMLPolyDataWriter()
writer.SetCompressorTypeToZLib()
writer.SetDataModeToBinary()
writer.SetFileName(os.path.join(os.path.split(name)[0],
os.path.splitext(os.path.split(name)[1])[0] +
'.' + writer.GetDefaultFileExtension()))
else:
writer = vtk.vtkDataSetWriter()
writer.SetHeader('# powered by '+scriptID)
writer.WriteToOutputStringOn()
if vtk.VTK_MAJOR_VERSION <= 5: writer.SetInput(Polydata)
else: writer.SetInputData(Polydata)
writer.Write()
if name is None: sys.stdout.write(writer.GetOutputString()[:writer.GetOutputStringLength()]) # limiting of outputString is fix for vtk <7.0
table.close()