/usr/share/vtk/GUI/Tcl/SphereWidget.tcl is in vtk-examples 5.8.0-17.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 | package require vtk
package require vtkinteraction
package require vtktesting
# This example demonstrates how to use the vtkSphereWidget to control the
# position of a light.
# Start by loading some data.
#
vtkDEMReader dem
dem SetFileName "$VTK_DATA_ROOT/Data/SainteHelens.dem"
dem Update
set Scale 2
vtkLookupTable lut
lut SetHueRange 0.6 0
lut SetSaturationRange 1.0 0
lut SetValueRange 0.5 1.0
set lo [expr $Scale * [lindex [dem GetElevationBounds] 0]]
set hi [expr $Scale * [lindex [dem GetElevationBounds] 1]]
vtkImageShrink3D shrink
shrink SetShrinkFactors 4 4 1
shrink SetInputConnection [dem GetOutputPort]
shrink AveragingOn
vtkImageDataGeometryFilter geom
geom SetInputConnection [shrink GetOutputPort]
geom ReleaseDataFlagOn
vtkWarpScalar warp
warp SetInputConnection [geom GetOutputPort]
warp SetNormal 0 0 1
warp UseNormalOn
warp SetScaleFactor $Scale
warp ReleaseDataFlagOn
vtkElevationFilter elevation
elevation SetInputConnection [warp GetOutputPort]
elevation SetLowPoint 0 0 $lo
elevation SetHighPoint 0 0 $hi
eval elevation SetScalarRange $lo $hi
elevation ReleaseDataFlagOn
vtkPolyDataNormals normals
normals SetInput [elevation GetPolyDataOutput]
normals SetFeatureAngle 60
normals ConsistencyOff
normals SplittingOff
normals ReleaseDataFlagOn
vtkPolyDataMapper demMapper
demMapper SetInputConnection [normals GetOutputPort]
eval demMapper SetScalarRange $lo $hi
demMapper SetLookupTable lut
demMapper ImmediateModeRenderingOn
vtkLODActor demActor
demActor SetMapper demMapper
# Create the RenderWindow, Renderer and both Actors
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
iren LightFollowCameraOff
iren SetInteractorStyle ""
# Associate the line widget with the interactor
vtkSphereWidget sphereWidget
sphereWidget SetInteractor iren
sphereWidget SetProp3D demActor
sphereWidget SetPlaceFactor 4
sphereWidget PlaceWidget
sphereWidget TranslationOff
sphereWidget ScaleOff
sphereWidget HandleVisibilityOn
sphereWidget AddObserver InteractionEvent MoveLight
# Add the actors to the renderer, set the background and size
#
ren1 AddActor demActor
ren1 SetBackground 1 1 1
renWin SetSize 300 300
ren1 SetBackground 0.1 0.2 0.4
set cam1 [ren1 GetActiveCamera]
$cam1 SetViewUp 0 0 1
eval $cam1 SetFocalPoint [[dem GetOutput] GetCenter]
$cam1 SetPosition 1 0 0
ren1 ResetCamera
$cam1 Elevation 25
$cam1 Azimuth 125
$cam1 Zoom 1.25
vtkLight light
eval light SetFocalPoint [[dem GetOutput] GetCenter]
ren1 AddLight light
# 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 .
# Actually probe the data
proc MoveLight {} {
eval light SetPosition [sphereWidget GetHandlePosition]
}
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