[vtkusers] drawing a line that doesn't rotate with interaction

[Jesse Corrington]

I am trying to create a scale bar, And I think the easiest way to do it will 
be to add a line actor that is only affected by zooming, not rotation.  So 
the line is always vertical in the same position, but it scales as the user 
zooms in and out.  I have not been able to figure out how to do this yet.  
Here is what I have, to just add the line actor.  Any help would be much 
appreciated.  Thanks

Jesse


//add the scale bar
vtkLineSource *lineSource = vtkLineSource::New();
lineSource->SetResolution(20);
lineSource->SetPoint1(10, 10, 0);
lineSource->SetPoint2(10, 400, 0);

vtkPolyDataMapper *lineMapper = vtkPolyDataMapper::New();
lineMapper->SetInput(lineSource->GetOutput());

lineActor = vtkActor::New();
lineActor->SetMapper(lineMapper);

pvtkRenderer->AddActor2D(lineActor);

_________________________________________________________________
Express yourself instantly with MSN Messenger! Download today - it's FREE! 
http://messenger.msn.click-url.com/go/onm00200471ave/direct/01/