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package require vtk
package require vtkinteraction
set file0 sgFile0.vts
set file1 sgFile1.vts
set file2 sgFile2.vts
# Create a reader and write out the field
vtkPLOT3DReader combReader
combReader SetXYZFileName "$VTK_DATA_ROOT/Data/combxyz.bin"
combReader SetQFileName "$VTK_DATA_ROOT/Data/combq.bin"
combReader SetScalarFunctionNumber 100
# extract to reduce extents of grid
vtkExtractGrid extract
extract SetInputConnection [combReader GetOutputPort]
extract SetVOI 0 28 0 32 0 24
extract Update
# write just a piece (extracted piece) as well as the whole thing
vtkXMLStructuredGridWriter gridWriter
gridWriter SetFileName $file0
gridWriter SetInputConnection [extract GetOutputPort]
gridWriter SetDataModeToAscii
gridWriter Write
gridWriter SetInputConnection [combReader GetOutputPort]
gridWriter SetFileName $file1
gridWriter SetDataModeToAppended
gridWriter SetNumberOfPieces 2
gridWriter Write
gridWriter SetFileName $file2
gridWriter SetDataModeToBinary
gridWriter SetWriteExtent 8 56 4 16 1 24
gridWriter Write
# read the extracted grid
vtkXMLStructuredGridReader reader
reader SetFileName $file0
reader WholeSlicesOff
reader Update
vtkStructuredGrid sg
sg DeepCopy [reader GetOutput]
vtkContourFilter cF0
cF0 SetInput sg
cF0 SetValue 0 0.38
vtkPolyDataMapper mapper0
mapper0 SetInputConnection [cF0 GetOutputPort]
mapper0 ScalarVisibilityOff
vtkActor actor0
actor0 SetMapper mapper0
# read the whole image
reader SetFileName $file1
reader WholeSlicesOn
reader Update
vtkStructuredGrid sg1
sg1 DeepCopy [reader GetOutput]
vtkContourFilter cF1
cF1 SetInput sg1
cF1 SetValue 0 0.38
vtkPolyDataMapper mapper1
mapper1 SetInputConnection [cF1 GetOutputPort]
mapper1 ScalarVisibilityOff
vtkActor actor1
actor1 SetMapper mapper1
actor1 SetPosition 0 -10 0
# read the partially written grid
reader SetFileName $file2
reader Update
vtkContourFilter cF2
cF2 SetInputConnection [reader GetOutputPort]
cF2 SetValue 0 0.38
vtkPolyDataMapper mapper2
mapper2 SetInputConnection [cF2 GetOutputPort]
mapper2 ScalarVisibilityOff
vtkActor actor2
actor2 SetMapper mapper2
actor2 SetPosition 0 10 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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