[vtkusers] Actor -- isMovable?

[Piotr Byzia]

Cory and Karthik,

Thank you for your suggestions.

By moving, I meant an interaction with a mouse.
Indeed, I have no interaction style defined explicitly, but it seems  
that Python interface has some default one set up, because I was able  
to run this:

lines_actor.PickableOff()
print lines_actor.GetPickable()
lines_actor.PickableOn()
print lines_actor.GetPickable()
lines_actor.SetPickable(0)
print lines_actor.GetPickable()

which produced:
0
1
0

(I apologize if this is something obvious for you, I just started  
experimenting with VTK)
So, vtkActor() has an interaction style by default, thus I was able to  
call PickableOff() on it.
However it does not work, while I was able to pick and move around  
(rotate) lines_actor with the mouse.

I had the same issue with lines_actor.DragableOff().

What is surprising, lines_actor.VisibilityOff() works fine!  
(lines_actor was not visible on the scene)

Do you possibly have ideas what can interfere with the PickableOff() ??

Thanks for any suggestions,
Piotr Byzia


On 04.11.2009, at 14:16, Cory Quammen wrote:

> Hi Piotr,
>
> Perhaps you could clarify what you mean by moving an actor. It doesn't
> sound like you have an interactor style that is manipulating the
> actors by picking with the mouse. If you did, however, you could call
> PickableOff() on the actor, which will prevent you from picking it and
> thereby prevent movement of the actor.
>
> How exactly are you moving the actors now?
>
> Cory
>
> On Wed, Nov 4, 2009 at 7:21 AM, Piotr Byzia <piotr.byzia at gmail.com>  
> wrote:
>> Hi,
>>
>> I want to set an actor to be movable or non-movable, depending on  
>> settings
>> which I control through PyQT GUI.
>> In other words, having a few actors on the scene I want to set  
>> checkboxes in
>> my GUI that would freeze a given actor, and the rest of them to  
>> react as
>> usual to the mouse movements / clicks.
>>
>> Regarding visibility of the actor I'm using GetProperty().SetOpacity 
>> (0.0) on
>> an instance of any given actor.
>> I can't see anything related to movement in the GetProperty()  
>> properties, I
>> believe it's somewhere else?
>>
>> Here are most important parts of the code I'm using to generate a  
>> single
>> actor:
>>
>> self.ren = vtk.vtkRenderer()
>> self.ren.SetBackground(0, 0, 0)
>> self.widget_3d.GetRenderWindow().AddRenderer(self.ren)
>>
>> apd=vtk.vtkAppendPolyData()
>>
>> for i in xrange(len(coordinates)):
>>    line=vtk.vtkLineSource()
>>
>>    line.SetPoint1(coordinates[i][0]) # 1st atom coordinates for a  
>> given bond
>>    line.SetPoint2(coordinates[i][1]) # 2nd atom coordinates for a  
>> given bond
>>    line.SetResolution(21)
>>    apd.AddInput(line.GetOutput())
>>
>> mapper = vtk.vtkPolyDataMapper()
>> mapper.SetInput(apd.GetOutput())
>> lines_actor = vtk.vtkActor()
>> lines_actor.SetMapper(mapper)
>> lines_actor.GetProperty().SetColor(0.7, 0.0, 0.0)
>> lines_actor.GetProperty().SetOpacity(1.0)
>>
>> self.ren.AddActor(lines_actor)
>>
>>
>> I found SetCurrentStyleToTrackballActor(), but I want to control this
>> behavior from my GUI.
>> Besides, trackball mode is very inconvenient in my case, with  
>> molecules in
>> "lines" representation (it's hard to pick a single line).
>>
>> Thanks,
>> Piotr Byzia
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>
>
> -- 
> Cory Quammen
> Center for Computer Integrated Systems for Microscopy and  
> Manipulation (CISMM)
> Department of Computer Science
> University of North Carolina at Chapel Hill
> http://www.cs.unc.edu/~cquammen