[vtkusers] Re: Saving actors and their current transformations (camera angle and orientation)

[Goodwin Lawlor]

Taro Trabish wrote:
> 
> 
> thanks,
> I tried  the vtkVRMLImporter/Exporter and it seemed to work but for some 
> reason if I move the actors (rotate, move, etc) and perform the save 
> operation, the load operation doesn't bring back the actor in the 
> current transformation... they seemed to be in the original state when I 
> loaded them up before I used the interactor (mouse) to move them 
> around.  But when I do simple mouse interactions it works but when I 
> play with the actors for about 1 minute moving and rotating the import 
> doesnt bring back what I exported.
>  
> Do u know what the problem might be.  I usually see the problem when I 
> rotate some actors by 180 degrees.  When I export and import, I dont get 
> back the fact that it was rotated 180 degrees.
>  
> Does VTK keep a internal "final" transformation from the start till 
> end... basically what info does the exporter know to use when exporting 
> the postion of the actors?

Hi Taro,

The exporter writes out the final actor transformation matrix and the 
importer reads the matrix in... I don't know why the code would be 
dependent of the amount of interaction.

Do you have a script that reproduces the problem? If you have, file it 
as a bug on the tracker http://www.vtk.org/Bug

Goodwin