DAMASK_EICMD/processing/post/vtk_addPointCloudData.py

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#!/usr/bin/env python3
import os
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from optparse import OptionParser
from collections import defaultdict
import vtk
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from vtk.util import numpy_support
import damask
scriptName = os.path.splitext(os.path.basename(__file__))[0]
scriptID = ' '.join([scriptName,damask.version])
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# --------------------------------------------------------------------
# MAIN
# --------------------------------------------------------------------
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parser = OptionParser(option_class=damask.extendableOption,
usage='%prog options [ASCIItable(s)]',
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description = """Add scalar and RGB tuples from ASCIItable to existing VTK point cloud (.vtp).""",
version = scriptID)
parser.add_option( '--vtk',
dest = 'vtk',
type = 'string', metavar = 'string',
help = 'VTK file name')
parser.add_option('-r', '--render',
dest = 'render',
action = 'store_true',
help = 'open output in VTK render window')
parser.add_option('-d', '--data',
dest = 'data',
action = 'extend', metavar = '<string LIST>',
help = 'scalar/vector value(s) label(s)')
parser.add_option('-t', '--tensor',
dest = 'tensor',
action = 'extend', metavar = '<string LIST>',
help = 'tensor (3x3) value label(s)')
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parser.add_option('-c', '--color', dest='color', action='extend',
metavar ='<string LIST>',
help = 'RGB color tuples')
parser.set_defaults(data = [],
tensor = [],
color = [],
)
(options, filenames) = parser.parse_args()
if not options.vtk: parser.error('no VTK file specified.')
if not os.path.exists(options.vtk): parser.error('VTK file does not exist.')
vtk_file,vtk_ext = os.path.splitext(options.vtk)
if vtk_ext == '.vtp':
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reader = vtk.vtkXMLPolyDataReader()
reader.SetFileName(options.vtk)
reader.Update()
Polydata = reader.GetOutput()
elif vtk_ext == '.vtk':
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reader = vtk.vtkGenericDataObjectReader()
reader.SetFileName(options.vtk)
reader.Update()
Polydata = reader.GetPolyDataOutput()
else:
parser.error('unsupported VTK file type extension.')
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Npoints = Polydata.GetNumberOfPoints()
Ncells = Polydata.GetNumberOfCells()
Nvertices = Polydata.GetNumberOfVerts()
if Npoints != Ncells or Npoints != Nvertices:
parser.error('number of points, cells, and vertices in VTK differ from each other.')
damask.util.croak('{}: {} points/vertices/cells...'.format(options.vtk,Npoints))
# --- 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()
remarks = []
errors = []
VTKarray = {}
active = defaultdict(list)
for datatype,dimension,label in [['data',0,options.data],
['tensor',9,options.tensor],
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['color' ,3,options.color],
]:
for i,dim in enumerate(table.label_dimension(label)):
me = label[i]
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if dim == -1: remarks.append('{} "{}" not found...'.format(datatype,me))
elif dimension > 0 \
and dim != dimension: remarks.append('"{}" not of dimension {}...'.format(me,dimension))
else:
remarks.append('adding {}{} "{}"...'.format(datatype if dim > 1 else 'scalar',
'' if dimension > 0 or dim == 1 else '[{}]'.format(dim),
me))
active[datatype].append(me)
if remarks != []: damask.util.croak(remarks)
if errors != []:
damask.util.croak(errors)
table.close(dismiss = True)
continue
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# --------------------------------------- process and add data -----------------------------------
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table.data_readArray([item for sublist in active.values() for item in sublist]) # read all requested data
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for datatype,labels in active.items(): # loop over scalar,color
for me in labels: # loop over all requested items
VTKtype = vtk.VTK_DOUBLE
VTKdata = table.data[:, table.label_indexrange(me)].copy() # copy to force contiguous layout
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if datatype == 'color':
VTKtype = vtk.VTK_UNSIGNED_CHAR
VTKdata = (VTKdata*255).astype(int) # translate to 0..255 UCHAR
elif datatype == 'tensor':
VTKdata[:,1] = VTKdata[:,3] = 0.5*(VTKdata[:,1]+VTKdata[:,3])
VTKdata[:,2] = VTKdata[:,6] = 0.5*(VTKdata[:,2]+VTKdata[:,6])
VTKdata[:,5] = VTKdata[:,7] = 0.5*(VTKdata[:,5]+VTKdata[:,7])
VTKarray[me] = numpy_support.numpy_to_vtk(num_array=VTKdata,deep=True,array_type=VTKtype)
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VTKarray[me].SetName(me)
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if datatype == 'color':
Polydata.GetPointData().SetScalars(VTKarray[me])
Polydata.GetCellData().SetScalars(VTKarray[me])
else:
Polydata.GetPointData().AddArray(VTKarray[me])
Polydata.GetCellData().AddArray(VTKarray[me])
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table.input_close() # close input ASCII table
# ------------------------------------------ output result ---------------------------------------
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Polydata.Modified()
writer = vtk.vtkXMLPolyDataWriter()
writer.SetDataModeToBinary()
writer.SetCompressorTypeToZLib()
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writer.SetFileName(vtk_file+'.'+writer.GetDefaultFileExtension())
writer.SetInputData(Polydata)
writer.Write()
# ------------------------------------------ render result ---------------------------------------
if options.render:
mapper = vtk.vtkDataSetMapper()
mapper.SetInputData(Polydata)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
# Create the graphics structure. The renderer renders into the
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# render window. The render window interactively captures mouse events
# and will perform appropriate camera or actor manipulation
# depending on the nature of the events.
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
ren.AddActor(actor)
ren.SetBackground(1, 1, 1)
renWin.SetSize(200, 200)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
iren.Initialize()
renWin.Render()
iren.Start()