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package require vtk
package require vtkinteraction
package require vtktesting
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# create pipeline
#
vtkMultiBlockPLOT3DReader pl3d
pl3d SetXYZFileName "$VTK_DATA_ROOT/Data/combxyz.bin"
pl3d SetQFileName "$VTK_DATA_ROOT/Data/combq.bin"
pl3d SetScalarFunctionNumber 100
pl3d SetVectorFunctionNumber 202
pl3d Update
set output [[pl3d GetOutput] GetBlock 0]
vtkPlaneSource ps
ps SetXResolution 4
ps SetYResolution 4
ps SetOrigin 2 -2 26
ps SetPoint1 2 2 26
ps SetPoint2 2 -2 32
vtkPolyDataMapper psMapper
psMapper SetInputConnection [ps GetOutputPort]
vtkActor psActor
psActor SetMapper psMapper
[psActor GetProperty] SetRepresentationToWireframe
vtkRungeKutta4 rk4
vtkStreamTracer streamer
streamer SetInputData $output
streamer SetSourceData [ps GetOutput]
streamer SetMaximumPropagation 100
streamer SetInitialIntegrationStep .2
streamer SetIntegrationDirectionToForward
streamer SetComputeVorticity 1
streamer SetIntegrator rk4
vtkSplineFilter sf
sf SetInputConnection [streamer GetOutputPort]
sf SetSubdivideToLength
sf SetLength 0.15
vtkRibbonFilter rf
rf SetInputConnection [sf GetOutputPort]
rf SetInputArrayToProcess 1 0 0 0 "Normals"
rf SetWidth 0.1
rf SetWidthFactor 5
vtkPolyDataMapper streamMapper
streamMapper SetInputConnection [rf GetOutputPort]
eval streamMapper SetScalarRange [$output GetScalarRange]
vtkActor streamline
streamline SetMapper streamMapper
vtkStructuredGridOutlineFilter outline
outline SetInputData $output
vtkPolyDataMapper outlineMapper
outlineMapper SetInputConnection [outline GetOutputPort]
vtkActor outlineActor
outlineActor SetMapper outlineMapper
# Add the actors to the renderer, set the background and size
#
ren1 AddActor psActor
ren1 AddActor outlineActor
ren1 AddActor streamline
ren1 SetBackground 1 1 1
renWin SetSize 300 300
ren1 SetBackground 0.1 0.2 0.4
set cam1 [ren1 GetActiveCamera]
$cam1 SetClippingRange 3.95297 50
$cam1 SetFocalPoint 9.71821 0.458166 29.3999
$cam1 SetPosition 2.7439 -37.3196 38.7167
$cam1 SetViewUp -0.16123 0.264271 0.950876
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
renWin Render
# prevent the tk window from showing up then start the event loop
wm withdraw .
# for testing
set threshold 15
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