[IGSTK-Developers] View class refactoring

[Luis Ibanez]

Hi Torleif,


About the last problem that you mentioned in your email:

When you get values from the picker of a view2D, the depth value
may correspond to the position in space of the object that you
are clicking on.

E.g. if there is a sphere rendered in space, you will get the
coordinates of the sphere surface.

Can you verify if this is what is happening in your case ?


    Thanks


       Luis



-----------------------
Torleif Sandnes wrote:
>>
>> You can add more than one widget to your application.  That  shouldn't 
>> cause spatialobject
>> rendering to disappear. The main constraint is only a single view  
>> object can be attached to a
>> widget. This is similar to the way you are doing it above. Having  
>> said that,  the rendered objects
>> could disappear if you set to the object a transform with a very  
>> short expiration time.
> 
> 
> I didn't set any transforms at all, but I understand that this could  be 
> the problem.
> Maybe the default transform of the spatialobject expires.
> Strange thing is it only occurs when starting more than one view.  (and 
> it did not occur with the oldt igstkQView2D class).
> 
> Also, I add object to the 3D view without setting transforms too, and  
> they remain.
> 
> I will try to add some transforms to my objects with really long  
> expiration times
> 
> Did you have any input on how to get the interactor of a view/widget?
> If an IGSTK class should use vtkImagePlaneWidget in some way, how  
> should it get hold of the vtkRenderWindowinteractor of a view?
> 
> I have come across one more issue regarding mouse events, but have  not 
> delved deep into the problem yet:
> When i click on a 2D view and listen for transforms from this view, I  
> sometimes get invalid values for the position along the z axis for  that 
> view. (Which should be constant all over the view). That is, for  a view 
> that is set at z=84.4 I sometimes get  (23.4, 65.3, -835.8).
> 
> Regards,
> 
> Torleif
> 
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