[vtkusers] vtkRenderWindowInteractor: Resetting User Transforms and Matrices

[John Eke]

Hi,

I currently have an image displayed in a vtkImageActor, in a 
(vtkRenderWindow ofcourse). The default interactor works well, but I 
need to be able to reset the vtkImageActor, to its original position, 
size and orientation (say when 'x' is pressed).

I have tried saving the UserMatrix in the beginning (before 
interactions), and restoring the matrix afterwards (when 'x' is 
pressed), but this only restores translations and scaling. If I rotate 
the image during interaction, when I press 'x' the original orientation 
isn't restored.

Is there an easy way to do this? or do I have to manually save the 
incremental rotation angles everytime the interactor rotates the 
vtkImageActor?

Thanks a lot guys

- John