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#!/usr/bin/python
import vtk
from vtk.test import Testing
from vtk.util.vtkAlgorithm import VTKPythonAlgorithmBase
class MovingSphereSource(VTKPythonAlgorithmBase):
def __init__(self):
VTKPythonAlgorithmBase.__init__(self,
nInputPorts=0,
nOutputPorts=1, outputType='vtkPolyData')
def RequestInformation(self, request, inInfo, outInfo):
info = outInfo.GetInformationObject(0)
t = range(0, 10)
info.Set(vtk.vtkStreamingDemandDrivenPipeline.TIME_STEPS(), t, len(t))
info.Set(vtk.vtkStreamingDemandDrivenPipeline.TIME_RANGE(), [t[0], t[-1]], 2)
return 1
def RequestData(self, request, inInfo, outInfo):
info = outInfo.GetInformationObject(0)
output = vtk.vtkPolyData.GetData(outInfo)
t = info.Get(vtk.vtkStreamingDemandDrivenPipeline.UPDATE_TIME_STEP())
sphere = vtk.vtkSphereSource()
sphere.SetCenter(t * 2, 0, 0)
sphere.Update()
output.ShallowCopy(sphere.GetOutput())
return 1
source = MovingSphereSource()
source.Update()
group = vtk.vtkMultiBlockFromTimeSeriesFilter()
group.SetInputConnection(source.GetOutputPort())
group.Update()
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
mapper = vtk.vtkCompositePolyDataMapper2()
mapper.SetInputConnection(group.GetOutputPort())
mapper.Update()
actor = vtk.vtkActor()
actor.SetMapper(mapper)
ren1.AddActor(actor)
ren1.ResetCamera()
renWin.SetSize(300, 300)
renWin.Render()
# render the image
#
iren.Initialize()
#iren.Start()
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