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#!/usr/bin/env python
import vtk
from vtk.util.misc import vtkGetDataRoot
# create planes
# Create the RenderWindow, Renderer
#
ren = vtk.vtkRenderer()
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer( ren )
iren = vtk.vtkRenderWindowInteractor()
iren.SetRenderWindow(renWin)
# create pipeline
#
pl3d = vtk.vtkPLOT3DReader()
pl3d.SetXYZFileName( vtkGetDataRoot() + '/Data/combxyz.bin' )
pl3d.SetQFileName( vtkGetDataRoot() + '/Data/combq.bin' )
pl3d.SetScalarFunctionNumber( 100 )
pl3d.SetVectorFunctionNumber( 202 )
pl3d.Update()
outline = vtk.vtkStructuredGridOutlineFilter()
outline.SetInputConnection(pl3d.GetOutputPort())
outlineMapper = vtk.vtkPolyDataMapper()
outlineMapper.SetInputConnection(outline.GetOutputPort())
outlineActor = vtk.vtkActor()
outlineActor.SetMapper(outlineMapper)
seeds = vtk.vtkLineSource()
seeds.SetPoint1(15, -5, 32)
seeds.SetPoint2(15, 5, 32)
seeds.SetResolution(10)
integ = vtk.vtkRungeKutta4()
sl = vtk.vtkStreamLine()
sl.SetIntegrator(integ)
sl.SetInputConnection(pl3d.GetOutputPort())
sl.SetSource(seeds.GetOutput())
sl.SetMaximumPropagationTime(0.1)
sl.SetIntegrationStepLength(0.1)
sl.SetIntegrationDirectionToBackward()
sl.SetStepLength(0.001)
tube = vtk.vtkTubeFilter()
tube.SetInputConnection(sl.GetOutputPort())
tube.SetRadius(0.1)
mapper = vtk.vtkPolyDataMapper()
mapper.SetInputConnection(tube.GetOutputPort())
actor = vtk.vtkActor()
actor.SetMapper(mapper)
mmapper = vtk.vtkPolyDataMapper()
mmapper.SetInputConnection(seeds.GetOutputPort())
mactor = vtk.vtkActor()
mactor.SetMapper(mmapper)
ren.AddActor(mactor)
ren.AddActor(actor)
ren.AddActor(outlineActor)
cam=ren.GetActiveCamera()
cam.SetClippingRange( 3.95297, 50 )
cam.SetFocalPoint( 8.88908, 0.595038, 29.3342 )
cam.SetPosition( -12.3332, 31.7479, 41.2387 )
cam.SetViewUp( 0.060772, -0.319905, 0.945498 )
renWin.Render()
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