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package require vtk
package require vtkinteraction
package require vtktesting
# On older Macs, 10 is too low. Due to what looks like a driver bug
# spectral lighting behaves sort of weird and produces small differences
set threshold 30
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# create pipeline
#
vtkStructuredPointsReader slc
slc SetFileName "$VTK_DATA_ROOT/Data/ironProt.vtk"
set colors "$flesh $banana $grey $pink $carrot $gainsboro $tomato $gold $thistle $chocolate"
set types "UnsignedChar Char Short UnsignedShort Int UnsignedInt Long UnsignedLong Float Double"
set i 1
set c 0
foreach vtkType $types {
vtkImageClip clip$vtkType
clip$vtkType SetInputConnection [slc GetOutputPort]
clip$vtkType SetOutputWholeExtent -1000 1000 -1000 1000 $i [expr $i + 5]
incr i 5
vtkImageCast castTo$vtkType
castTo$vtkType SetOutputScalarTypeTo$vtkType
castTo$vtkType SetInputConnection [clip$vtkType GetOutputPort]
castTo$vtkType ClampOverflowOn
vtkContourFilter iso$vtkType
iso$vtkType SetInputConnection [castTo$vtkType GetOutputPort]
iso$vtkType GenerateValues 1 30 30
iso$vtkType ComputeScalarsOff
iso$vtkType ComputeGradientsOff
vtkPolyDataMapper iso${vtkType}Mapper
iso${vtkType}Mapper SetInputConnection [iso$vtkType GetOutputPort]
iso${vtkType}Mapper ImmediateModeRenderingOn
vtkActor iso${vtkType}Actor
iso${vtkType}Actor SetMapper iso${vtkType}Mapper
[iso${vtkType}Actor GetProperty] SetDiffuseColor [lindex $colors $c] [lindex $colors [expr $c + 1]] [lindex $colors [expr $c + 2]]
[iso${vtkType}Actor GetProperty] SetSpecularPower 30
[iso${vtkType}Actor GetProperty] SetDiffuse .7
[iso${vtkType}Actor GetProperty] SetSpecular .5
incr c 3
ren1 AddActor iso${vtkType}Actor
}
vtkOutlineFilter outline
outline SetInputConnection [slc GetOutputPort]
vtkPolyDataMapper outlineMapper
outlineMapper SetInputConnection [outline GetOutputPort]
vtkActor outlineActor
outlineActor SetMapper outlineMapper
outlineActor VisibilityOff
# Add the actors to the renderer, set the background and size
#
ren1 AddActor outlineActor
ren1 SetBackground 0.9 .9 .9
ren1 ResetCamera
[ren1 GetActiveCamera] SetViewAngle 30
[ren1 GetActiveCamera] Elevation 20
[ren1 GetActiveCamera] Azimuth 20
[ren1 GetActiveCamera] Zoom 1.5
ren1 ResetCameraClippingRange
renWin SetSize 400 400
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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