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#!/usr/bin/env python
from vtkmodules.vtkIOFides import vtkFidesWriter, vtkFidesReader
from vtkmodules.vtkCommonDataModel import vtkPartitionedDataSetCollection, vtkPolyData
from vtkmodules.vtkCommonExecutionModel import vtkStreamingDemandDrivenPipeline
from vtkmodules.vtkFiltersSources import vtkSphereSource
from vtkmodules.util.misc import vtkGetTempDir
from vtk.util.vtkAlgorithm import VTKPythonAlgorithmBase
try:
# Not directly used here, but if it's not imported when VTK_USE_MPI, we get following error:
# Attempting to use an MPI routine before initializing MPICH
from mpi4py import MPI
except ImportError:
pass
try:
import numpy as np
from vtkmodules.util.numpy_support import numpy_to_vtk
except ImportError:
print('This test requires numpy!')
from vtkmodules.test import Testing
Testing.skip()
import os.path
VTK_TEMP_DIR = vtkGetTempDir()
from vtk.test import Testing
class DataSource(VTKPythonAlgorithmBase):
def __init__(self):
VTKPythonAlgorithmBase.__init__(self, nInputPorts=0,
nOutputPorts=1, outputType='vtkPolyData')
def RequestInformation(self, request, inInfo, outInfo):
info = outInfo.GetInformationObject(0)
ts = range(0, 6)
info.Set(vtkStreamingDemandDrivenPipeline.TIME_STEPS(), ts, len(ts))
info.Set(vtkStreamingDemandDrivenPipeline.TIME_RANGE(), [ts[0], ts[-1]], 2)
return 1
def RequestData(self, request, inInfo, outInfo):
info = outInfo.GetInformationObject(0)
output = vtkPolyData.GetData(info)
timestep = info.Get(vtkStreamingDemandDrivenPipeline.UPDATE_TIME_STEP())
sphere = vtkSphereSource()
sphere.SetRadius(1.0)
sphere.SetThetaResolution(16)
sphere.SetPhiResolution(16)
sphere.SetCenter(timestep * 2.0, 0, 0)
sphere.Update()
data = sphere.GetOutput()
numPts = data.GetNumberOfPoints()
npArray = np.sin(timestep + np.linspace(0, np.pi, numPts))
array = numpy_to_vtk(npArray)
array.SetName('MyPointField')
data.GetPointData().AddArray(array)
output.ShallowCopy(data)
return 1
class TestFidesWriterTime(Testing.vtkTest):
def testTime(self):
source = DataSource()
source.Update()
# write all time steps
filename = os.path.join(VTK_TEMP_DIR, 'testTime1.bp')
writer = vtkFidesWriter()
writer.SetFileName(filename)
writer.SetInputConnection(source.GetOutputPort())
writer.Write()
reader = vtkFidesReader()
reader.SetFileName(filename)
reader.UpdateInformation()
self.assertTrue(reader.GetOutputInformation(0).Has(
vtkStreamingDemandDrivenPipeline.TIME_STEPS()))
nsteps = reader.GetOutputInformation(0).Length(vtkStreamingDemandDrivenPipeline.TIME_STEPS())
self.assertEqual(nsteps, 6)
self.assertEqual(reader.GetNumberOfPointArrays(), 2)
reader.ConvertToVTKOn()
reader.Update()
pdsc = reader.GetOutputDataObject(0)
self.assertTrue(isinstance(pdsc, vtkPartitionedDataSetCollection))
pds = pdsc.GetPartitionedDataSet(0)
nParts = pds.GetNumberOfPartitions()
self.assertEqual(nParts, 1)
ds = pds.GetPartition(0)
self.assertEqual(ds.GetNumberOfCells(), 448)
self.assertEqual(ds.GetNumberOfPoints(), 226)
# do a test for writing only some time steps
writer = vtkFidesWriter()
filename = os.path.join(VTK_TEMP_DIR, 'testTime2.bp')
writer.SetFileName(filename)
writer.SetInputConnection(source.GetOutputPort())
writer.SetTimeStepStride(2)
writer.Write()
reader = vtkFidesReader()
reader.SetFileName(filename)
reader.UpdateInformation()
self.assertTrue(reader.GetOutputInformation(0).Has(
vtkStreamingDemandDrivenPipeline.TIME_STEPS()))
nsteps = reader.GetOutputInformation(0).Length(vtkStreamingDemandDrivenPipeline.TIME_STEPS())
self.assertEqual(nsteps, 3)
self.assertEqual(reader.GetNumberOfPointArrays(), 2)
reader.ConvertToVTKOn()
reader.Update()
pdsc = reader.GetOutputDataObject(0)
self.assertTrue(isinstance(pdsc, vtkPartitionedDataSetCollection))
pds = pdsc.GetPartitionedDataSet(0)
nParts = pds.GetNumberOfPartitions()
self.assertEqual(nParts, 1)
ds = pds.GetPartition(0)
self.assertEqual(ds.GetNumberOfCells(), 448)
self.assertEqual(ds.GetNumberOfPoints(), 226)
if __name__ == "__main__":
Testing.main([(TestFidesWriterTime, 'test')])
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