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#!/usr/bin/env python
# import os
import vtk
from vtk.test import Testing
from vtk.util.misc import vtkGetDataRoot
VTK_DATA_ROOT = vtkGetDataRoot()
# create pipeline - rectilinear grid
#
rgridReader = vtk.vtkRectilinearGridReader()
rgridReader.SetFileName(VTK_DATA_ROOT + "/Data/RectGrid2.vtk")
outline = vtk.vtkOutlineFilter()
outline.SetInputConnection(rgridReader.GetOutputPort())
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(outline.GetOutputPort())
actor = vtk.vtkActor()
actor.SetMapper(mapper)
rgridReader.Update()
extract1 = vtk.vtkExtractRectilinearGrid()
extract1.SetInputConnection(rgridReader.GetOutputPort())
# extract1.SetVOI(0, 46, 0, 32, 0, 10)
extract1.SetVOI(23, 40, 16, 30, 9, 9)
extract1.SetSampleRate(2, 2, 1)
extract1.IncludeBoundaryOn()
extract1.Update()
surf1 = vtk.vtkDataSetSurfaceFilter()
surf1.SetInputConnection(extract1.GetOutputPort())
tris = vtk.vtkTriangleFilter()
tris.SetInputConnection(surf1.GetOutputPort())
mapper1 = vtk.vtkPolyDataMapper()
mapper1.SetInputConnection(tris.GetOutputPort())
mapper1.SetScalarRange(extract1.GetOutput().GetScalarRange())
actor1 = vtk.vtkActor()
actor1.SetMapper(mapper1)
# Create the RenderWindow, Renderer and both Actors
#
ren1 = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren1)
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# ren1.AddActor(actor)
ren1.AddActor(actor1)
renWin.SetSize(340, 400)
iren.Initialize()
# render the image
#iren.Start()
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