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package require vtk
package require vtkinteraction
# create a rendering window and renderer
vtkRenderer ren1
vtkRenderWindow renWin
renWin AddRenderer ren1
renWin StereoCapableWindowOn
vtkRenderWindowInteractor iren
iren SetRenderWindow renWin
vtkGenericEnSightReader reader
reader SetCaseFileName "$VTK_DATA_ROOT/Data/EnSight/elements6.case"
reader Update
vtkGeometryFilter geom
geom SetInputConnection [reader GetOutputPort]
vtkArrayCalculator calc
calc SetInputConnection [geom GetOutputPort]
calc SetAttributeModeToUsePointData
calc SetFunction "pointCVectors_r . pointCVectors_i + pointScalars"
calc AddScalarArrayName "pointScalars" 0
calc AddVectorArrayName "pointCVectors_r" 0 1 2
calc AddVectorArrayName "pointCVectors_i" 0 1 2
calc SetResultArrayName "test"
vtkPolyDataMapper mapper
mapper SetInputConnection [calc GetOutputPort]
mapper SetColorModeToMapScalars
mapper SetScalarModeToUsePointFieldData
mapper ColorByArrayComponent "test" 0
mapper SetScalarRange 0 36000
vtkActor actor
actor SetMapper mapper
# assign our actor to the renderer
ren1 AddActor actor
# enable user interface interactor
iren AddObserver UserEvent {wm deiconify .vtkInteract}
iren Initialize
renWin Render
# prevent the tk window from showing up then start the event loop
wm withdraw .
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