package require vtk
package require vtkinteraction

vtkRenderer ren1
vtkRenderWindow renWin
  renWin AddRenderer ren1

vtkVRMLImporter importer
  importer SetRenderWindow renWin
  importer SetFileName "$VTK_DATA_ROOT/Data/bot2.wrl"
  importer Read

vtkRenderWindowInteractor iren
  iren SetRenderWindow renWin

[importer GetRenderer] SetBackground 0.1 0.2 0.4
[importer GetRenderWindow] SetSize 300 300

#
# the importer created the renderer
set renCollection [renWin GetRenderers] 
$renCollection InitTraversal
set ren [$renCollection GetNextItem]

#
# change view up to +z
#
[$ren GetActiveCamera] SetPosition -3.25303 3.46205 3.15906
[$ren GetActiveCamera] SetFocalPoint 0 0 0
[$ren GetActiveCamera] SetViewUp 0.564063 0.825024 -0.0341876

#
# let the renderer compute good position and focal point
#
$ren ResetCamera
[$ren GetActiveCamera] Dolly 1.75
ren1 ResetCameraClippingRange

# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize
wm withdraw .