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import vtk
from vtk.test import Testing
from vtk.util.misc import vtkGetTempDir
VTK_TEMP_DIR = vtkGetTempDir()
contr = vtk.vtkMultiProcessController.GetGlobalController()
if not contr:
nranks = 1
rank = 0
else:
nranks = contr.GetNumberOfProcesses()
rank = contr.GetLocalProcessId()
pf = vtk.vtkProgrammableFilter()
def execute():
info = pf.GetOutputInformation(0)
et = vtk.vtkExtentTranslator()
et.SetWholeExtent(info.Get(vtk.vtkStreamingDemandDrivenPipeline.WHOLE_EXTENT()))
et.SetPiece(info.Get(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_PIECE_NUMBER()))
et.SetNumberOfPieces(info.Get(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_NUMBER_OF_PIECES()))
et.PieceToExtent()
output = pf.GetOutput()
input = pf.GetInput()
output.ShallowCopy(input)
output.Crop(et.GetExtent())
pf.SetExecuteMethod(execute)
def GetSource(dataType):
s = vtk.vtkRTAnalyticSource()
if dataType == 'ImageData':
return s
elif dataType == 'UnstructuredGrid':
dst = vtk.vtkDataSetTriangleFilter()
dst.SetInputConnection(s.GetOutputPort())
return dst
elif dataType == 'RectilinearGrid':
s.Update()
input = s.GetOutput()
rg = vtk.vtkRectilinearGrid()
rg.SetExtent(input.GetExtent())
dims = input.GetDimensions()
spacing = input.GetSpacing()
x = vtk.vtkFloatArray()
x.SetNumberOfTuples(dims[0])
for i in range(dims[0]):
x.SetValue(i, spacing[0]*i)
y = vtk.vtkFloatArray()
y.SetNumberOfTuples(dims[1])
for i in range(dims[1]):
y.SetValue(i, spacing[1]*i)
z = vtk.vtkFloatArray()
z.SetNumberOfTuples(dims[2])
for i in range(dims[2]):
z.SetValue(i, spacing[2]*i)
rg.SetXCoordinates(x)
rg.SetYCoordinates(y)
rg.SetZCoordinates(z)
rg.GetPointData().ShallowCopy(input.GetPointData())
pf.SetInputData(rg)
return pf
elif dataType == 'StructuredGrid':
s.Update()
input = s.GetOutput()
sg = vtk.vtkStructuredGrid()
sg.SetExtent(input.GetExtent())
pts = vtk.vtkPoints()
sg.SetPoints(pts)
npts = input.GetNumberOfPoints()
for i in xrange(npts):
pts.InsertNextPoint(input.GetPoint(i))
sg.GetPointData().ShallowCopy(input.GetPointData())
pf.SetInputData(sg)
return pf
def TestDataType(dataType, reader, writer, ext, numTris):
s = GetSource(dataType)
filename = VTK_TEMP_DIR + "/%s.p%s" % (dataType, ext)
writer.SetInputConnection(s.GetOutputPort())
npieces = 16
writer.SetNumberOfPieces(npieces)
pperrank = npieces / nranks
start = pperrank * rank
end = start + pperrank - 1
writer.SetStartPiece(start)
writer.SetEndPiece(end)
writer.SetFileName(filename)
#writer.SetDataModeToAscii()
writer.Write()
if contr:
contr.Barrier()
reader.SetFileName(filename)
cf = vtk.vtkContourFilter()
cf.SetValue(0, 130)
cf.SetComputeNormals(0)
cf.SetComputeGradients(0)
cf.SetInputConnection(reader.GetOutputPort())
cf.UpdateInformation()
cf.GetOutputInformation(0).Set(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_NUMBER_OF_PIECES(), nranks)
cf.GetOutputInformation(0).Set(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_PIECE_NUMBER(), rank)
cf.Update()
ntris = cf.GetOutput().GetNumberOfCells()
da = vtk.vtkIntArray()
da.InsertNextValue(ntris)
da2 = vtk.vtkIntArray()
da2.SetNumberOfTuples(1)
contr.AllReduce(da, da2, vtk.vtkCommunicator.SUM_OP)
if rank == 0:
print da2.GetValue(0)
import os
os.remove(filename)
for i in range(npieces):
os.remove(VTK_TEMP_DIR + "/%s_%d.%s" % (dataType, i, ext))
assert da2.GetValue(0) == numTris
TestDataType('ImageData', vtk.vtkXMLPImageDataReader(), vtk.vtkXMLPImageDataWriter(), 'vti', 4924)
TestDataType('RectilinearGrid', vtk.vtkXMLPRectilinearGridReader(), vtk.vtkXMLPRectilinearGridWriter(), 'vtr', 4924)
TestDataType('StructuredGrid', vtk.vtkXMLPStructuredGridReader(), vtk.vtkXMLPStructuredGridWriter(), 'vts', 4924)
TestDataType('UnstructuredGrid', vtk.vtkXMLPUnstructuredGridReader(), vtk.vtkXMLPUnstructuredGridWriter(), 'vtu', 11856)
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