[vtkusers] Change display origin from lower left 2 upper left

[Frank Lindseth]

Hi all,

Is it possible to change VTK's display/viewport convention from  
(origin in lower left):
/\  y
  |
  |
O--------> x

To (origin in upper left):
O--------> x
  |
  |
\/  y

Any help would be greatly appreciated.


Background:
We would like to replace the old "display system"  in an existing  
application with a new based on VTK,
i.e. both display/viewport layout and visualizing exiting data that  
"assumes" that the display/viewport origin is in the upper left corner,
converting setup/data coordinates (y) is of course an option, but it  
would make things a lot easier if VTK used the same origin (as opposed  
to the lower-left default),
I'm pretty sure that I was able to set this a long time ago  
(vtkRenderWindow-method maybe?), but can't find the needed  
functionality anywhere anymore,
is it possible?

- Frank


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