[vtkusers] add centered Line on top of the Image

[Uril Yakubov]

Hi, 

Does anyone now how to add centered line on top of the image? For
example I am using vtkImageViewer2 to show my image. My problem is that
image cover the line and I need opposite affect. Here my code:

#add centered line 
set Line [vtkLineSource New]
    $Line SetPoint1 -50 100 28
    $Line SetPoint2 250 100 28
set LineMapper [vtkPolyDataMapper New] 
    $LineMapper SetInput [$Line GetOutput]

set LineActor [vtkActor New]
    $LineActor SetMapper $LineMapper
    [$LineActor GetProperty] SetColor 1.0 0.0 0.0

# rw instance of vtkKWRenderWidget
[$rw GetRenderer] AddActor $LineActor



Thank you for your help.

Uril.