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package require vtk
package require vtkinteraction
# This example demonstrates the reading of a field and conversion to PolyData
# The output should be the same as polyEx.tcl.
# get the interactor ui
# Create a reader and write out the field
vtkPolyDataReader reader
reader SetFileName "$VTK_DATA_ROOT/Data/polyEx.vtk"
vtkDataSetToDataObjectFilter ds2do
ds2do SetInputConnection [reader GetOutputPort]
if {[catch {set channel [open "PolyField.vtk" "w"]}] == 0 } {
close $channel
vtkDataObjectWriter writer
writer SetInputConnection [ds2do GetOutputPort]
writer SetFileName "PolyField.vtk"
writer Write
# create pipeline
#
vtkDataObjectReader dor
dor SetFileName "PolyField.vtk"
vtkDataObjectToDataSetFilter do2ds
do2ds SetInputConnection [dor GetOutputPort]
do2ds SetDataSetTypeToPolyData
do2ds SetPointComponent 0 "Points" 0
do2ds SetPointComponent 1 "Points" 1
do2ds SetPointComponent 2 "Points" 2
do2ds SetPolysComponent "Polys" 0
vtkFieldDataToAttributeDataFilter fd2ad
fd2ad SetInput [do2ds GetPolyDataOutput]
fd2ad SetInputFieldToDataObjectField
fd2ad SetOutputAttributeDataToPointData
fd2ad SetScalarComponent 0 "my_scalars" 0
vtkPolyDataMapper mapper
mapper SetInput [fd2ad GetPolyDataOutput]
eval mapper SetScalarRange [[fd2ad GetOutput] GetScalarRange]
vtkActor actor
actor SetMapper mapper
# Create the RenderWindow, Renderer and both Actors
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
ren1 AddActor actor
ren1 SetBackground 1 1 1
renWin SetSize 300 300
ren1 ResetCamera
set cam1 [ren1 GetActiveCamera]
$cam1 SetClippingRange .348 17.43
$cam1 SetPosition 2.92 2.62 -0.836
$cam1 SetViewUp -0.436 -0.067 -0.897
$cam1 Azimuth 90
# render the image
#
iren AddObserver UserEvent {wm deiconify .vtkInteract}
renWin Render
if {[info commands "rtExMath"] != ""} {
file delete -force "PolyField.vtk"
}
}
# prevent the tk window from showing up then start the event loop
wm withdraw .
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