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package require vtk
package require vtkinteraction
# Create the RenderWindow, Renderer and both Actors
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# load in the image
#
vtkTIFFReader pnmReader
pnmReader SetFileName "$VTK_DATA_ROOT/Data/beach.tif"
vtkImageActor ia
ia SetInput [pnmReader GetOutput]
# Add the actors to the renderer, set the background and size
ren1 AddActor ia
ren1 SetBackground 0.1 0.2 0.4
renWin SetSize 400 400
# render the image
iren AddObserver UserEvent {wm deiconify .vtkInteract}
renWin Render
set cam1 [ren1 GetActiveCamera]
$cam1 Elevation -30
$cam1 Roll -20
ren1 ResetCameraClippingRange
renWin Render
# prevent the tk window from showing up then start the event loop
wm withdraw .
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