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package require vtk
package require vtkinteraction
set file0 rgFile0.vtr
set file1 rgFile1.vtr
set file2 rgFile2.vtr
# read in some grid data
vtkRectilinearGridReader gridReader
gridReader SetFileName "$VTK_DATA_ROOT/Data/RectGrid2.vtk"
gridReader Update
# extract to reduce extents of grid
vtkExtractRectilinearGrid extract
extract SetInputConnection [gridReader GetOutputPort]
extract SetVOI 0 23 0 32 0 10
extract Update
# write just a piece (extracted piece) as well as the whole thing
vtkXMLRectilinearGridWriter rgWriter
rgWriter SetFileName $file0
rgWriter SetInputConnection [extract GetOutputPort]
rgWriter SetDataModeToAscii
rgWriter Write
rgWriter SetFileName $file1
rgWriter SetInputConnection [gridReader GetOutputPort]
rgWriter SetDataModeToAppended
rgWriter SetNumberOfPieces 2
rgWriter Write
rgWriter SetFileName $file2
rgWriter SetDataModeToBinary
rgWriter SetWriteExtent 3 46 6 32 1 5
rgWriter SetCompressor ""
if {[rgWriter GetByteOrder]} {
rgWriter SetByteOrder 0
} else {
rgWriter SetByteOrder 1
}
rgWriter Write
# read the extracted grid
vtkXMLRectilinearGridReader reader
reader SetFileName $file0
reader WholeSlicesOff
reader Update
vtkRectilinearGrid rg0
rg0 DeepCopy [reader GetOutput]
vtkDataSetMapper mapper0
mapper0 SetInputData rg0
vtkActor actor0
actor0 SetMapper mapper0
# read the whole grid
reader SetFileName $file1
reader WholeSlicesOn
reader Update
vtkRectilinearGrid rg1
rg1 DeepCopy [reader GetOutput]
vtkDataSetMapper mapper1
mapper1 SetInputData rg1
vtkActor actor1
actor1 SetMapper mapper1
actor1 SetPosition -1.5 3 0
# read the partially written grid
reader SetFileName $file2
reader Update
vtkDataSetMapper mapper2
mapper2 SetInputConnection [reader GetOutputPort]
vtkActor actor2
actor2 SetMapper mapper2
actor2 SetPosition 1.5 3 0
# Create the RenderWindow, Renderer and both Actors
#
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 actor0
ren1 AddActor actor1
ren1 AddActor actor2
renWin SetSize 300 300
iren Initialize
renWin Render
iren AddObserver UserEvent {wm deiconify .vtkInteract}
# prevent the tk window from showing up then start the event loop
wm withdraw .
file delete -force $file0
file delete -force $file1
file delete -force $file2
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