[vtkusers] SetVectors

[stephanie.prudhomme at incka.fr]

Hi,
I would like print vector results (arrows on each node) with vtk4.2 (and tcl)
But nothing appeared
Can you tell me why?
or give to me a simple example which run

Thanks
Stéphanie


vtkUnstructuredGrid grid
vtkHedgeHog hog
vtkDataSetMapper hogMap
vtkActor Actor
vtkDoubleArray vectors
vectors SetNumberOfComponents 3

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[ grid GetPointData ] SetVectors vectors
hog SetInput grid
hog SetVectorModeToUseVector
hogMap SetInput [grid GetOutput]
actor SetMapper hogMap
renderer AddActor actor