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# This example shows how to use cutting (vtkCutter) and how it compares
# with extracting a plane from a computational grid.
#
package require vtk
package require vtkinteraction
# Read some data.
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 pl3dOutput [[pl3d GetOutput] GetBlock 0 ]
# The cutter uses an implicit function to perform the cutting.
# Here we define a plane, specifying its center and normal.
# Then we assign the plane to the cutter.
vtkPlane plane
eval plane SetOrigin [$pl3dOutput GetCenter]
plane SetNormal -0.287 0 0.9579
vtkCutter planeCut
planeCut SetInputData $pl3dOutput
planeCut SetCutFunction plane
vtkPolyDataMapper cutMapper
cutMapper SetInputConnection [planeCut GetOutputPort]
eval cutMapper SetScalarRange \
[[[$pl3dOutput GetPointData] GetScalars] GetRange]
vtkActor cutActor
cutActor SetMapper cutMapper
# Here we extract a computational plane from the structured grid.
# We render it as wireframe.
vtkStructuredGridGeometryFilter compPlane
compPlane SetInputData $pl3dOutput
compPlane SetExtent 0 100 0 100 9 9
vtkPolyDataMapper planeMapper
planeMapper SetInputConnection [compPlane GetOutputPort]
planeMapper ScalarVisibilityOff
vtkActor planeActor
planeActor SetMapper planeMapper
[planeActor GetProperty] SetRepresentationToWireframe
[planeActor GetProperty] SetColor 0 0 0
# The outline of the data puts the data in context.
vtkStructuredGridOutlineFilter outline
outline SetInputData $pl3dOutput
vtkPolyDataMapper outlineMapper
outlineMapper SetInputConnection [outline GetOutputPort]
vtkActor outlineActor
outlineActor SetMapper outlineMapper
set outlineProp [outlineActor GetProperty]
eval $outlineProp SetColor 0 0 0
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# Add the actors to the renderer, set the background and size
#
ren1 AddActor outlineActor
ren1 AddActor planeActor
ren1 AddActor cutActor
ren1 SetBackground 1 1 1
renWin SetSize 400 300
set cam1 [ren1 GetActiveCamera]
$cam1 SetClippingRange 11.1034 59.5328
$cam1 SetFocalPoint 9.71821 0.458166 29.3999
$cam1 SetPosition -2.95748 -26.7271 44.5309
$cam1 SetViewUp 0.0184785 0.479657 0.877262
iren Initialize
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
# prevent the tk window from showing up then start the event loop
wm withdraw .
iren Start
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