You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
63 lines
1.5 KiB
63 lines
1.5 KiB
package require vtk
|
|
package require vtkinteraction
|
|
|
|
# Create the RenderWindow and Renderer
|
|
vtkRenderer ren1
|
|
vtkRenderWindow renWin
|
|
renWin AddRenderer ren1
|
|
vtkRenderWindowInteractor iren
|
|
iren SetRenderWindow renWin
|
|
|
|
# create a default polygonal sphere
|
|
vtkSphereSource sphere
|
|
vtkPolyDataMapper sphmapper
|
|
sphmapper SetInputConnection [sphere GetOutputPort]
|
|
vtkActor sphactor
|
|
sphactor SetMapper sphmapper
|
|
|
|
# Add the actors to the renderer, set the background to initial
|
|
# color (which is also transparent), set size.
|
|
ren1 AddActor sphactor
|
|
ren1 SetBackground 0.1 0.2 0.4
|
|
renWin SetSize 256 256
|
|
|
|
# render first image
|
|
renWin Render
|
|
|
|
# create window to image filter, grabbing RGB and alpha
|
|
vtkWindowToImageFilter w2i
|
|
w2i SetInput renWin
|
|
w2i SetInputBufferTypeToRGBA
|
|
|
|
# grab window
|
|
w2i Update
|
|
|
|
# set up mappers and actors to display the image
|
|
vtkImageMapper im
|
|
im SetColorWindow 255
|
|
im SetColorLevel 127.5
|
|
im SetInputConnection [w2i GetOutputPort]
|
|
vtkActor2D ia2
|
|
ia2 SetMapper im
|
|
|
|
# now, change the image (background is now green)
|
|
sphactor SetScale 2 2 2
|
|
ren1 SetBackground 0 1 0
|
|
|
|
# add the image of the sphere (keeping the original sphere too)
|
|
ren1 AddActor ia2
|
|
ren1 SetViewport 0 0 1 1
|
|
|
|
# render result (the polygonal sphere appears behind a smaller image
|
|
# of itself). Background of original image is transparent, so you
|
|
# can see through it back to the larger sphere and new background.
|
|
|
|
renWin Render
|
|
|
|
iren AddObserver UserEvent {wm deiconify .vtkInteract}
|
|
# prevent the tk window from showing up then start the event loop
|
|
wm withdraw .
|
|
|
|
|
|
|
|
|
|
|