[vtkusers] Lines width

[vtk at le.isac.cnr.it]

Hi ,
I work witdh VTK 4, tcl/tk on linux workstation.
I'd drow a line, but i want to change a width.
Can i do to change it? 


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vtkPoints Pts

    #set barra [expr $barra + $incrementobarra]
    Pts InsertNextPoint 0.70 0.055 0.0
    Pts InsertNextPoint 0.70 0.055 0.0
    
    vtkCellArray Lines
    Lines InsertNextCell 2
    Lines InsertCellPoint 0
    Lines InsertCellPoint 1


    
    vtkPolyData Grid
    Grid SetPoints Pts
    Grid SetLines Lines
    


# Set up the mapper and actor (2D) for the grid.
vtkPolyDataMapper2D mapper_linea
    mapper_linea SetInput Grid
    mapper_linea SetTransformCoordinate normCoords
vtkActor2D gridActor
    gridActor SetMapper mapper_linea
    [gridActor GetProperty] SetColor 0 1 0
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