[vtkusers] How to find the "view trasformation" after a 3D camera operation?

[Amy Henderson]

What version of VTK are you using? In versions since at least 4.0, there 
are methods in vtkCamera called GetViewTransformObject (which returns a 
vtkTransform) and GetViewTransformMatrix (which returns a vtkMatrix4x4).

- Amy

At 10:21 AM 7/16/2004, Veerapuram Varadhan wrote:
>Hi All,
>
>I am trying to use camera->GetViewTransform(); but VTK says it is
>deprecated.  Can anyone help me in finding the transformation of a
>co-ordinate point (in world co-ordinates) after any of zoom, rotate,
>fly-in, fly-out operations?
>
>Basically, i am creating a "text annotation" widget.  Since, i was not
>able to pick a text actor through vtkCellPicker or vtkPropPicker, I
>have implemented my own (brut-forth) algorithm to pick the widget.  It
>checks whether the relevant mouse event has occurred within the
>bounding box of the text actor and does the picking.
>
>But this algorithm, seems to be not working when we do Zoom or rotate
>or fly or any operation that would transform the co-ordinate.
>
>Any help in this regard would be greatly appreciated.
>
>TIA,
>
>V. Varadhan.
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