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#!/usr/bin/env python
import vtk
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# Create the RenderWindow, Renderer and both Actors
#
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
reader = vtk.vtkParticleReader()
reader.SetFileName("" + str(VTK_DATA_ROOT) + "/Data/Particles.raw")
reader.SetDataByteOrderToBigEndian()
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(reader.GetOutputPort())
mapper.SetScalarRange(4,9)
mapper.SetPiece(1)
mapper.SetNumberOfPieces(2)
actor = vtk.vtkActor()
actor.SetMapper(mapper)
actor.GetProperty().SetPointSize(2.5)
# Add the actors to the renderer, set the background and size
#
ren1.AddActor(actor)
ren1.SetBackground(0,0,0)
renWin.SetSize(200,200)
# Get handles to some useful objects
#
iren.Initialize()
renWin.Render()
# prevent the tk window from showing up then start the event loop
# --- end of script --
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