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package require vtk
package require vtkinteraction
# Demonstrate automatic resampling of textures (i.e., OpenGL only handles
# power of two texture maps. This examples exercise's vtk's automatic
# power of two resampling).
#
# get the interactor ui
# create pipeline
#
# generate texture map (not power of two)
vtkVolume16Reader v16
v16 SetDataDimensions 64 64
[v16 GetOutput] SetOrigin 0.0 0.0 0.0
v16 SetDataByteOrderToLittleEndian
v16 SetFilePrefix "$VTK_DATA_ROOT/Data/headsq/quarter"
v16 SetImageRange 1 93
v16 SetDataSpacing 3.2 3.2 1.5
vtkExtractVOI extract
extract SetInputConnection [v16 GetOutputPort]
extract SetVOI 32 32 0 63 0 93
vtkTexture atext
atext SetInputConnection [extract GetOutputPort]
atext InterpolateOn
# gnerate plane to map texture on to
vtkPlaneSource plane
plane SetXResolution 1
plane SetYResolution 1
vtkPolyDataMapper textureMapper
textureMapper SetInputConnection [plane GetOutputPort]
vtkActor textureActor
textureActor SetMapper textureMapper
textureActor SetTexture atext
# Create the RenderWindow, Renderer
#
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
# Add the actors to the renderer, set the background and size
#
ren1 AddActor textureActor
renWin SetSize 250 250
ren1 SetBackground 0.1 0.2 0.4
iren Initialize
iren AddObserver UserEvent {wm deiconify .vtkInteract}
# prevent the tk window from showing up then start the event loop
wm withdraw .
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