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package require vtk
package require vtkinteraction
# get the interactor ui
## Graphics stuff
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
vtkPLOT3DReader 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 range [[[[pl3d GetOutput] GetPointData] GetScalars] GetRange]
set min [lindex $range 0]
set max [lindex $range 1]
set value [expr ($min + $max) / 2.0]
vtkContourFilter cf
cf SetInputConnection [pl3d GetOutputPort]
cf SetValue 0 $value
cf UseScalarTreeOn
set numberOfContours 5
set epsilon [expr double($max - $min) / double($numberOfContours * 10)]
set min [expr $min + $epsilon]
set max [expr $max - $epsilon]
for {set i 1} { $i <= $numberOfContours } {incr i} {
cf SetValue 0 [expr $min + (($i - 1) / double($numberOfContours - 1) )*($max - $min)]
cf Update
vtkPolyData pd$i
pd$i CopyStructure [cf GetOutput]
[pd$i GetPointData] DeepCopy [[cf GetOutput] GetPointData]
vtkPolyDataMapper mapper$i
mapper$i SetInput pd$i
eval mapper$i SetScalarRange \
[[[[pl3d GetOutput] GetPointData] GetScalars] GetRange]
vtkActor actor$i
actor$i AddPosition 0 [expr $i * 12] 0
actor$i SetMapper mapper$i
ren1 AddActor actor$i
}
# Add the actors to the renderer, set the background and size
#
ren1 SetBackground .3 .3 .3
renWin SetSize 450 150
set cam1 [ren1 GetActiveCamera]
[ren1 GetActiveCamera] SetPosition -36.3762 32.3855 51.3652
[ren1 GetActiveCamera] SetFocalPoint 8.255 33.3861 29.7687
[ren1 GetActiveCamera] SetViewAngle 30
[ren1 GetActiveCamera] SetViewUp 0 0 1
ren1 ResetCameraClippingRange
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 .
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