package require vtk
package require vtkinteraction

# create a rendering window and renderer
vtkRenderer ren1
vtkRenderWindow renWin
    renWin AddRenderer ren1
vtkRenderWindowInteractor iren
    iren SetRenderWindow renWin

# create cones of varying resolution
vtkConeSource cone0
  cone0 SetResolution 0
vtkConeSource cone1
  cone1 SetResolution 1
vtkConeSource cone2
  cone2 SetResolution 2
vtkConeSource cone8
  cone8 SetResolution 8

vtkPolyDataMapper cone0Mapper
  cone0Mapper SetInputConnection [cone0 GetOutputPort]
vtkActor cone0Actor
  cone0Actor SetMapper cone0Mapper

vtkPolyDataMapper cone1Mapper
  cone1Mapper SetInputConnection [cone1 GetOutputPort]
vtkActor cone1Actor
  cone1Actor SetMapper cone1Mapper

vtkPolyDataMapper cone2Mapper
  cone2Mapper SetInputConnection [cone2 GetOutputPort]
vtkActor cone2Actor
  cone2Actor SetMapper cone2Mapper

vtkPolyDataMapper cone8Mapper
  cone8Mapper SetInputConnection [cone8 GetOutputPort]
vtkActor cone8Actor
  cone8Actor SetMapper cone8Mapper

# assign our actor to the renderer
ren1 AddActor cone0Actor
ren1 AddActor cone1Actor
ren1 AddActor cone2Actor
ren1 AddActor cone8Actor
ren1 SetBackground .5 .5 .5
ren1 ResetCamera
[ren1 GetActiveCamera] Elevation 30
[ren1 GetActiveCamera] Dolly 1.3
ren1 ResetCameraClippingRange

renWin SetSize 301 91
cone0Actor SetPosition -1.5 0 0
cone1Actor SetPosition -.5 0 0
cone2Actor SetPosition .5 0 0
cone8Actor SetPosition 1.5 0 0

[cone0Actor GetProperty] SetDiffuseColor 1 0 0
[cone1Actor GetProperty] SetDiffuseColor 0 1 0
[cone8Actor GetProperty] BackfaceCullingOn
[cone8Actor GetProperty] SetDiffuseColor 0 0 1

# enable user interface interactor
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize

# prevent the tk window from showing up then start the event loop
wm withdraw .