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Actor -- isMovable?
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Actor -- isMovable?
by Piotr Byzia
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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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Cory Quammen
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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@...> 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 > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the VTK FAQ at: > http://www.vtk.org/Wiki/VTK_FAQ > > Follow this link to subscribe/unsubscribe: > http://www.vtk.org/mailman/listinfo/vtkusers > -- 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Karthik Krishnan-2
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Perhaps you are referring to actor2D's that lie on the overlay plane and don't move with the rest of the scene during interaction ? If so, to pick it, you should us a vtkPropPicker. Cell pickers won't pick actor2D's
On Wed, Nov 4, 2009 at 8:16 AM, Cory Quammen <cquammen@...> wrote: Hi Piotr, -- _________________________________ Karthik Krishnan R&D Engineer, Kitware Inc. Ph: +1 5188814919, +91 9538477060 Fax: 518 371 4573 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Piotr Byzia
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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@...> > 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 >> _______________________________________________ >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Please keep messages on-topic and check the VTK FAQ at: >> http://www.vtk.org/Wiki/VTK_FAQ >> >> Follow this link to subscribe/unsubscribe: >> http://www.vtk.org/mailman/listinfo/vtkusers >> > > > > -- > 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Karthik Krishnan-2
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try to disable the interactor style set on teh interactor
interactor->GetInteractorStyle()->EnabledOff() On Wed, Nov 4, 2009 at 10:35 AM, Piotr Byzia <piotr.byzia@...> wrote: Cory and Karthik, _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Piotr Byzia
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Hi Karthik, I disabled the interactor style, however I still can rotate my actor (by the mouse interaction). This's what I've done: widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().EnabledOff() my_actor.PickableOff() widget_3d is an instance of QVTKRenderWindowInteractor.QVTKRenderWindowInteractor(self) Below is an output for widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle() Let me know if there is any other information which might help. vtkInteractorStyleSwitch (0E995418) Debug: Off Modified Time: 945 Reference Count: 2 Registered Events: (none) Current Renderer: 00000000 Default Renderer: 00000000 Enabled: 0 Priority: 0 Interactor: 0E9418D0 Key Press Activation: Off Key Press Activation Value: i Auto Adjust Camera Clipping Range On Pick Color: (1, 0, 0) CurrentRenderer: 00000000 Picked Renderer: (none) Current Actor: (none) Interactor: 0E9418D0 Prop Picked: No State: 0 UseTimers: 0 HandleObservers: 1 MouseWheelMotionFactor: 1 Timer Duration: 10 CurrentStyle 0E9A3818 vtkInteractorStyleTrackballCamera Debug: Off Modified Time: 1703 Reference Count: 1 Registered Events: Registered Observers: vtkObserver (0E9912B8) Event: 41 EventName: EndInteractionEvent Command: 0E9A58E0 Priority: 0 Tag: 2 vtkObserver (0E9906B0) Event: 39 EventName: StartInteractionEvent Command: 0E9A58E0 Priority: 0 Tag: 1 Current Renderer: 00000000 Default Renderer: 00000000 Enabled: 0 Priority: 0 Interactor: 0E9418D0 Key Press Activation: Off Key Press Activation Value: i Auto Adjust Camera Clipping Range On Pick Color: (1, 0, 0) CurrentRenderer: 00000000 Picked Renderer: (none) Current Actor: (none) Interactor: 0E9418D0 Prop Picked: No State: 0 UseTimers: 0 HandleObservers: 1 MouseWheelMotionFactor: 1 Timer Duration: 10 MotionFactor: 10 On 04.11.2009, at 18:25, Karthik Krishnan wrote: try to disable the interactor style set on teh interactor _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Cory Quammen
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Piotr,
The interactor style you have let's you switch between two modes. In one mode, you are moving the camera. Mouse motions in the window will affect the camera, but it will not change the actors position or orientation in world space. Sure, they appear to move on the screen, but what you see really comes from the camera moving. In this mode, calling PickableOff() won't have any effect because you aren't picking any actors. The other mode, however, lets you pick individual actors and change their position, orientation, and scale in world space. For this mode, you *can* pick actors and change these properties. Calling PickableOff() will have an effect here; it will prevent you from picking and subsequently modifying the actor position, orientation, and scale. In your code, the first mode is what you have. To see what the second mode is like, you might try widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().SetCurrentStyleToTrackballActor() This mode will let you manipulate individual actors, unless of course you set them to PickableOff(). This seems to me close to what are you going for. I hope that helps, Cory On Thu, Nov 5, 2009 at 5:48 AM, Piotr Byzia <piotr.byzia@...> wrote: > Hi Karthik, > I disabled the interactor style, however I still can rotate my actor (by the > mouse interaction). > This's what I've done: > widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().EnabledOff() > my_actor.PickableOff() > widget_3d is an instance of > QVTKRenderWindowInteractor.QVTKRenderWindowInteractor(self) > Below is an output > for widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle() > Let me know if there is any other information which might help. > vtkInteractorStyleSwitch (0E995418) > Debug: Off > Modified Time: 945 > Reference Count: 2 > Registered Events: (none) > Current Renderer: 00000000 > Default Renderer: 00000000 > Enabled: 0 > Priority: 0 > Interactor: 0E9418D0 > Key Press Activation: Off > Key Press Activation Value: i > Auto Adjust Camera Clipping Range On > Pick Color: (1, 0, 0) > CurrentRenderer: 00000000 > Picked Renderer: (none) > Current Actor: (none) > Interactor: 0E9418D0 > Prop Picked: No > State: 0 > UseTimers: 0 > HandleObservers: 1 > MouseWheelMotionFactor: 1 > Timer Duration: 10 > CurrentStyle 0E9A3818 > vtkInteractorStyleTrackballCamera > Debug: Off > Modified Time: 1703 > Reference Count: 1 > Registered Events: > Registered Observers: > vtkObserver (0E9912B8) > Event: 41 > EventName: EndInteractionEvent > Command: 0E9A58E0 > Priority: 0 > Tag: 2 > vtkObserver (0E9906B0) > Event: 39 > EventName: StartInteractionEvent > Command: 0E9A58E0 > Priority: 0 > Tag: 1 > Current Renderer: 00000000 > Default Renderer: 00000000 > Enabled: 0 > Priority: 0 > Interactor: 0E9418D0 > Key Press Activation: Off > Key Press Activation Value: i > Auto Adjust Camera Clipping Range On > Pick Color: (1, 0, 0) > CurrentRenderer: 00000000 > Picked Renderer: (none) > Current Actor: (none) > Interactor: 0E9418D0 > Prop Picked: No > State: 0 > UseTimers: 0 > HandleObservers: 1 > MouseWheelMotionFactor: 1 > Timer Duration: 10 > MotionFactor: 10 > > > On 04.11.2009, at 18:25, Karthik Krishnan wrote: > > try to disable the interactor style set on teh interactor > > interactor->GetInteractorStyle()->EnabledOff() > > On Wed, Nov 4, 2009 at 10:35 AM, Piotr Byzia <piotr.byzia@...> wrote: >> >> 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@...> >>> 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 >>>> _______________________________________________ >>>> Powered by www.kitware.com >>>> >>>> Visit other Kitware open-source projects at >>>> http://www.kitware.com/opensource/opensource.html >>>> >>>> Please keep messages on-topic and check the VTK FAQ at: >>>> http://www.vtk.org/Wiki/VTK_FAQ >>>> >>>> Follow this link to subscribe/unsubscribe: >>>> http://www.vtk.org/mailman/listinfo/vtkusers >>>> >>> >>> >>> >>> -- >>> 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 >> >> _______________________________________________ >> Powered by www.kitware.com >> >> Visit other Kitware open-source projects at >> http://www.kitware.com/opensource/opensource.html >> >> Please keep messages on-topic and check the VTK FAQ at: >> http://www.vtk.org/Wiki/VTK_FAQ >> >> Follow this link to subscribe/unsubscribe: >> http://www.vtk.org/mailman/listinfo/vtkusers > > > > -- 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by David Doria-2
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On Thu, Nov 5, 2009 at 7:52 AM, Cory Quammen <cquammen@...> wrote:
> Piotr, > > The interactor style you have let's you switch between two modes. In > one mode, you are moving the camera. Mouse motions in the window will > affect the camera, but it will not change the actors position or > orientation in world space. Sure, they appear to move on the screen, > but what you see really comes from the camera moving. In this mode, > calling PickableOff() won't have any effect because you aren't picking > any actors. > > The other mode, however, lets you pick individual actors and change > their position, orientation, and scale in world space. For this mode, > you *can* pick actors and change these properties. Calling > PickableOff() will have an effect here; it will prevent you from > picking and subsequently modifying the actor position, orientation, > and scale. > > In your code, the first mode is what you have. To see what the second > mode is like, you might try > > widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().SetCurrentStyleToTrackballActor() > > This mode will let you manipulate individual actors, unless of course > you set them to PickableOff(). This seems to me close to what are you > going for. > > I hope that helps, > Cory Piotr, I STRONGLY encourage you to do the following: - Start a new project. - Create sphere source and a cube source and position them next to each other. - Convince yourself that in one mode you can move each actor individually and in the other mode the camera moves around both actors. - Write a tiny tutorial about which keys to press to achieve each effect. - Post the code + tutorial on the mailing list and/or wiki. Sound like a plan? Thanks, David _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Piotr Byzia
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Thank you Cory,
This explains everything :-) And it'd be a perfect solution if there were some kind of offset when picking an object to act on. I couldn't find anything helpful on http://www.vtk.org/doc/release/4.0/html/classvtkInteractorStyleTrackballActor.html but maybe it's some different class I should be looking in? In my case, actors are molecules in lines representation (sample http://media.piotr.byzia.pl/molecule_lines.PNG ) and it's hard to target a single line to rotate / zoom it, thus vtkInteractorStyleTrackballCamera was ideal: I could rotate a molecule wherever I pressed a mouse button. However, imagine 2 molecules in the same window, now, I want to be able to pick only one of them and rotate etc. so I can't use a TrackballCamera mode, and TrackballActor is a pain with those lines... If you still have a patience, my additional questions are, how can I retrieve a coordinates (the same code as previously pasted in this message) of all points used to draw a lines, after rotating my molecule? And the last one, as I mentioned earlier, I was able to set actor VisibilityOff() property from my GUI, but the change is made only after I move mouse over the rendering window. How can I update window right after the property has been set? I tried my_actor.GetMapper().GetInput().Update() ren.Render() ren.Render().Update() ren is QVTKWindowInteractor instance. I guess this is the source of my problem, while there are only a few methods overloaded. I'd appreciate any pointers, which method I should add there so that updating will work. Thank you, Piotr Byzia On 05.11.2009, at 13:52, Cory Quammen wrote: > Piotr, > > The interactor style you have let's you switch between two modes. In > one mode, you are moving the camera. Mouse motions in the window will > affect the camera, but it will not change the actors position or > orientation in world space. Sure, they appear to move on the screen, > but what you see really comes from the camera moving. In this mode, > calling PickableOff() won't have any effect because you aren't picking > any actors. > > The other mode, however, lets you pick individual actors and change > their position, orientation, and scale in world space. For this mode, > you *can* pick actors and change these properties. Calling > PickableOff() will have an effect here; it will prevent you from > picking and subsequently modifying the actor position, orientation, > and scale. > > In your code, the first mode is what you have. To see what the second > mode is like, you might try > > widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle > ().SetCurrentStyleToTrackballActor() > > This mode will let you manipulate individual actors, unless of course > you set them to PickableOff(). This seems to me close to what are you > going for. > > I hope that helps, > Cory > > On Thu, Nov 5, 2009 at 5:48 AM, Piotr Byzia <piotr.byzia@...> > wrote: >> Hi Karthik, >> I disabled the interactor style, however I still can rotate my >> actor (by the >> mouse interaction). >> This's what I've done: >> widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle >> ().EnabledOff() >> my_actor.PickableOff() >> widget_3d is an instance of >> QVTKRenderWindowInteractor.QVTKRenderWindowInteractor(self) >> Below is an output >> for widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle() >> Let me know if there is any other information which might help. >> vtkInteractorStyleSwitch (0E995418) >> Debug: Off >> Modified Time: 945 >> Reference Count: 2 >> Registered Events: (none) >> Current Renderer: 00000000 >> Default Renderer: 00000000 >> Enabled: 0 >> Priority: 0 >> Interactor: 0E9418D0 >> Key Press Activation: Off >> Key Press Activation Value: i >> Auto Adjust Camera Clipping Range On >> Pick Color: (1, 0, 0) >> CurrentRenderer: 00000000 >> Picked Renderer: (none) >> Current Actor: (none) >> Interactor: 0E9418D0 >> Prop Picked: No >> State: 0 >> UseTimers: 0 >> HandleObservers: 1 >> MouseWheelMotionFactor: 1 >> Timer Duration: 10 >> CurrentStyle 0E9A3818 >> vtkInteractorStyleTrackballCamera >> Debug: Off >> Modified Time: 1703 >> Reference Count: 1 >> Registered Events: >> Registered Observers: >> vtkObserver (0E9912B8) >> Event: 41 >> EventName: EndInteractionEvent >> Command: 0E9A58E0 >> Priority: 0 >> Tag: 2 >> vtkObserver (0E9906B0) >> Event: 39 >> EventName: StartInteractionEvent >> Command: 0E9A58E0 >> Priority: 0 >> Tag: 1 >> Current Renderer: 00000000 >> Default Renderer: 00000000 >> Enabled: 0 >> Priority: 0 >> Interactor: 0E9418D0 >> Key Press Activation: Off >> Key Press Activation Value: i >> Auto Adjust Camera Clipping Range On >> Pick Color: (1, 0, 0) >> CurrentRenderer: 00000000 >> Picked Renderer: (none) >> Current Actor: (none) >> Interactor: 0E9418D0 >> Prop Picked: No >> State: 0 >> UseTimers: 0 >> HandleObservers: 1 >> MouseWheelMotionFactor: 1 >> Timer Duration: 10 >> MotionFactor: 10 >> >> >> On 04.11.2009, at 18:25, Karthik Krishnan wrote: >> >> try to disable the interactor style set on teh interactor >> >> interactor->GetInteractorStyle()->EnabledOff() >> >> On Wed, Nov 4, 2009 at 10:35 AM, Piotr Byzia >> <piotr.byzia@...> wrote: >>> >>> 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@...> >>>> 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 >>>>> _______________________________________________ >>>>> Powered by www.kitware.com >>>>> >>>>> Visit other Kitware open-source projects at >>>>> http://www.kitware.com/opensource/opensource.html >>>>> >>>>> Please keep messages on-topic and check the VTK FAQ at: >>>>> http://www.vtk.org/Wiki/VTK_FAQ >>>>> >>>>> Follow this link to subscribe/unsubscribe: >>>>> http://www.vtk.org/mailman/listinfo/vtkusers >>>>> >>>> >>>> >>>> >>>> -- >>>> 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 >>> >>> _______________________________________________ >>> Powered by www.kitware.com >>> >>> Visit other Kitware open-source projects at >>> http://www.kitware.com/opensource/opensource.html >>> >>> Please keep messages on-topic and check the VTK FAQ at: >>> http://www.vtk.org/Wiki/VTK_FAQ >>> >>> Follow this link to subscribe/unsubscribe: >>> http://www.vtk.org/mailman/listinfo/vtkusers >> >> >> >> > > > > -- > 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Cory Quammen
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On Thu, Nov 5, 2009 at 8:46 AM, Piotr Byzia <piotr.byzia@...> wrote:
> Thank you Cory, > > This explains everything :-) > > And it'd be a perfect solution if there were some kind of offset when > picking an object to act on. > > I couldn't find anything helpful on > http://www.vtk.org/doc/release/4.0/html/classvtkInteractorStyleTrackballActor.html > but maybe it's some different class I should be looking in? > > In my case, actors are molecules in lines representation (sample > http://media.piotr.byzia.pl/molecule_lines.PNG) and it's hard to target a > single line to rotate / zoom it, thus vtkInteractorStyleTrackballCamera was > ideal: I could rotate a molecule wherever I pressed a mouse button. > > However, imagine 2 molecules in the same window, now, I want to be able to > pick only one of them and rotate etc. so I can't use a TrackballCamera mode, > and TrackballActor is a pain with those lines... Yes, I can see how that would be a pain. I'm not sure how you can do this with mouse interaction without changing the representation of the molecule to something thicker than lines. An alternative might be to provide transformation controls in your GUI, but that is a bit more cumbersome for the user. You can manually change the orientation of the actor with vtkActor->RotateX(), ->RotateY(), ->RotateZ(), for instance. > If you still have a patience, my additional questions are, how can I > retrieve a coordinates (the same code as previously pasted in this message) > of all points used to draw a lines, after rotating my molecule? If you are just moving the camera, then the point positions will not change. If you are moving the actor, the points in your molecule data will also not change: all that changes is that the actor tells the GPU to apply a matrix describing the position/orientation/size of the geometry before drawing it. To get the points as they appear to be positioned in the screen, you can apply that same matrix that the actor uses to your data set. Do this by getting the transformation matrix with vtkActor->GetMatrix() and set that up in a vtkTransformFilter like this (forgive me if this isn't absolutely correct Python): transform = vtkMatrixToLinearTransform() transform.SetMatrix(actor->GetMatrix()) transformFilter = vtkTransformFilter() transformFilter.SetTransform(transform) transformFilter.SetInput(moleculeGeometry) transformFilter.Update() rotatedMolecule = transformFilter.GetOutput() rotatedMolecule.Update() # might not be necessary for i in xrange(rotatedMolecule.GetNumberOfPoints()): pt = rotatedMolecule.GetPoint(i) # Do something with point This assumes you have the molecule line geometry stored in a vtkPolyData. The transform filter applies the same transformation matrix that was applied to the actor that you manipulated. I hope that I didn't make this too confusing. I am doing this very thing in an application, so I know that it works. > And the last one, as I mentioned earlier, I was able to set actor > VisibilityOff() property from my GUI, but the change is made only after I > move mouse over the rendering window. How can I update window right after > the property has been set? > I tried > my_actor.GetMapper().GetInput().Update() > ren.Render() > ren.Render().Update() > > ren is QVTKWindowInteractor instance. I guess this is the source of my > problem, while there are only a few methods overloaded. Try ren->GetRenderWindow()->Render() Cory > > I'd appreciate any pointers, which method I should add there so that > updating will work. > > Thank you, > Piotr Byzia > > > > On 05.11.2009, at 13:52, Cory Quammen wrote: > >> Piotr, >> >> The interactor style you have let's you switch between two modes. In >> one mode, you are moving the camera. Mouse motions in the window will >> affect the camera, but it will not change the actors position or >> orientation in world space. Sure, they appear to move on the screen, >> but what you see really comes from the camera moving. In this mode, >> calling PickableOff() won't have any effect because you aren't picking >> any actors. >> >> The other mode, however, lets you pick individual actors and change >> their position, orientation, and scale in world space. For this mode, >> you *can* pick actors and change these properties. Calling >> PickableOff() will have an effect here; it will prevent you from >> picking and subsequently modifying the actor position, orientation, >> and scale. >> >> In your code, the first mode is what you have. To see what the second >> mode is like, you might try >> >> >> widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().SetCurrentStyleToTrackballActor() >> >> This mode will let you manipulate individual actors, unless of course >> you set them to PickableOff(). This seems to me close to what are you >> going for. >> >> I hope that helps, >> Cory >> >> On Thu, Nov 5, 2009 at 5:48 AM, Piotr Byzia <piotr.byzia@...> wrote: >>> >>> Hi Karthik, >>> I disabled the interactor style, however I still can rotate my actor (by >>> the >>> mouse interaction). >>> This's what I've done: >>> >>> widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle().EnabledOff() >>> my_actor.PickableOff() >>> widget_3d is an instance of >>> QVTKRenderWindowInteractor.QVTKRenderWindowInteractor(self) >>> Below is an output >>> for widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle() >>> Let me know if there is any other information which might help. >>> vtkInteractorStyleSwitch (0E995418) >>> Debug: Off >>> Modified Time: 945 >>> Reference Count: 2 >>> Registered Events: (none) >>> Current Renderer: 00000000 >>> Default Renderer: 00000000 >>> Enabled: 0 >>> Priority: 0 >>> Interactor: 0E9418D0 >>> Key Press Activation: Off >>> Key Press Activation Value: i >>> Auto Adjust Camera Clipping Range On >>> Pick Color: (1, 0, 0) >>> CurrentRenderer: 00000000 >>> Picked Renderer: (none) >>> Current Actor: (none) >>> Interactor: 0E9418D0 >>> Prop Picked: No >>> State: 0 >>> UseTimers: 0 >>> HandleObservers: 1 >>> MouseWheelMotionFactor: 1 >>> Timer Duration: 10 >>> CurrentStyle 0E9A3818 >>> vtkInteractorStyleTrackballCamera >>> Debug: Off >>> Modified Time: 1703 >>> Reference Count: 1 >>> Registered Events: >>> Registered Observers: >>> vtkObserver (0E9912B8) >>> Event: 41 >>> EventName: EndInteractionEvent >>> Command: 0E9A58E0 >>> Priority: 0 >>> Tag: 2 >>> vtkObserver (0E9906B0) >>> Event: 39 >>> EventName: StartInteractionEvent >>> Command: 0E9A58E0 >>> Priority: 0 >>> Tag: 1 >>> Current Renderer: 00000000 >>> Default Renderer: 00000000 >>> Enabled: 0 >>> Priority: 0 >>> Interactor: 0E9418D0 >>> Key Press Activation: Off >>> Key Press Activation Value: i >>> Auto Adjust Camera Clipping Range On >>> Pick Color: (1, 0, 0) >>> CurrentRenderer: 00000000 >>> Picked Renderer: (none) >>> Current Actor: (none) >>> Interactor: 0E9418D0 >>> Prop Picked: No >>> State: 0 >>> UseTimers: 0 >>> HandleObservers: 1 >>> MouseWheelMotionFactor: 1 >>> Timer Duration: 10 >>> MotionFactor: 10 >>> >>> >>> On 04.11.2009, at 18:25, Karthik Krishnan wrote: >>> >>> try to disable the interactor style set on teh interactor >>> >>> interactor->GetInteractorStyle()->EnabledOff() >>> >>> On Wed, Nov 4, 2009 at 10:35 AM, Piotr Byzia <piotr.byzia@...> >>> wrote: >>>> >>>> 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@...> >>>>> 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 >>>>>> _______________________________________________ >>>>>> Powered by www.kitware.com >>>>>> >>>>>> Visit other Kitware open-source projects at >>>>>> http://www.kitware.com/opensource/opensource.html >>>>>> >>>>>> Please keep messages on-topic and check the VTK FAQ at: >>>>>> http://www.vtk.org/Wiki/VTK_FAQ >>>>>> >>>>>> Follow this link to subscribe/unsubscribe: >>>>>> http://www.vtk.org/mailman/listinfo/vtkusers >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> 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 >>>> >>>> _______________________________________________ >>>> Powered by www.kitware.com >>>> >>>> Visit other Kitware open-source projects at >>>> http://www.kitware.com/opensource/opensource.html >>>> >>>> Please keep messages on-topic and check the VTK FAQ at: >>>> http://www.vtk.org/Wiki/VTK_FAQ >>>> >>>> Follow this link to subscribe/unsubscribe: >>>> http://www.vtk.org/mailman/listinfo/vtkusers >>> >>> >>> >>> >> >> >> >> -- >> 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 > > -- 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by Piotr Byzia
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Hi Cory,
This sounds relatively easy, I'll confirm this next week :-) Once again, thank you for your great support! PS. Obviously, I wanted to reply to all, but used wrong key binding... Regards, Piotr Byzia On 09.11.2009, at 13:56, Cory Quammen wrote: > Piotr, > > I've replied to the list so that others may benefit from our > discussion. > > I understand your question as: 1). you have a data set, 2). you've > found a camera view you want to preserve, and 3). you want to apply > this view to a modified version of your molecule. This is quite easy. > > If you are making the change to the molecule data in the same > application instance, as long as you make sure that the first VTK > filter in your pipeline can "see" the change (e.g., at some point one > of the filter's Modified() methods is called), calling > ren->GetRenderWindow()->Render() should invoke a series of updates > that will lead to your updated model being displayed. Basically, you > don't have to do anything but re-render. The camera view should not > change or reset. > > If you want to save the camera view across program instances, you can > get the camera matrix similar to how you would do it in the vtkActor. > But I find it easier to do as follows: > > vtkCamera* cam = renderer->GetActiveCamera(); > double* position = cam->GetPosition(); > double* focalPoint = cam->GetFocalPoint(); > double* upVector = cam->GetViewUp(); > > // Save position, focalPoint, upVector, all of which are 3-element > double arrays, to a file or data structure > > To set the camera up again, just use > > cam->SetPosition(position); > cam->SetFocalPoint(focalPoint); > cam->SetViewUp(upVector); > > Hope that helps, > Cory > > On Mon, Nov 9, 2009 at 4:05 AM, Piotr Byzia <piotr.byzia@...> > wrote: >> Hi Cory, >> >> These are incredibly helpful insights, thank you so much. >> >> I must re-thing this interactor style issue. >> >> ren->GetRenderWindow()->Render() turned out to be what I needed :) >> >> And one follow-up question to the transformation matrix: let's say >> I have >> rotated the camera on the scene with my molecule (so the initial >> view has >> changed using vtkInteractorStyleTrackballCamera), followed by a >> changes in >> some of the molecules data set (a few coordinates changes resulting >> in a new >> coordinates for some lines). What should be a course of action here >> if I >> want to preserve the view (same angle, distance etc. of the camera) >> and >> update the molecule actor? Similar to what you described below, >> except that >> after redrawing a whole structure I must apply a transformation >> matrix to >> the *camera* to update the view accordingly? >> In other words, what is equivalent for the vtkActor->GetMatrix() >> and how >> should I update the camera view after reloading the molecule. >> I guess this is going to be suboptimal (reloading the whole >> structure again >> and setting the camera again). Any suggestions on improvements are >> more than >> welcome ;-) >> >> I apologize if I'm not using the proper VTK's vocabulary here. >> >> Best wishes, >> Piotr Byzia >> >> >> >> >> On 05.11.2009, at 16:18, Cory Quammen wrote: >> >>> On Thu, Nov 5, 2009 at 8:46 AM, Piotr Byzia >>> <piotr.byzia@...> wrote: >>>> >>>> Thank you Cory, >>>> >>>> This explains everything :-) >>>> >>>> And it'd be a perfect solution if there were some kind of offset >>>> when >>>> picking an object to act on. >>>> >>>> I couldn't find anything helpful on >>>> >>>> http://www.vtk.org/doc/release/4.0/html/classvtkInteractorStyleTrackballActor.html >>>> but maybe it's some different class I should be looking in? >>>> >>>> In my case, actors are molecules in lines representation (sample >>>> http://media.piotr.byzia.pl/molecule_lines.PNG) and it's hard to >>>> target a >>>> single line to rotate / zoom it, thus >>>> vtkInteractorStyleTrackballCamera >>>> was >>>> ideal: I could rotate a molecule wherever I pressed a mouse button. >>>> >>>> However, imagine 2 molecules in the same window, now, I want to >>>> be able >>>> to >>>> pick only one of them and rotate etc. so I can't use a >>>> TrackballCamera >>>> mode, >>>> and TrackballActor is a pain with those lines... >>> >>> Yes, I can see how that would be a pain. I'm not sure how you can do >>> this with mouse interaction without changing the representation of >>> the >>> molecule to something thicker than lines. An alternative might be to >>> provide transformation controls in your GUI, but that is a bit more >>> cumbersome for the user. You can manually change the orientation of >>> the actor with vtkActor->RotateX(), ->RotateY(), ->RotateZ(), for >>> instance. >>> >>>> If you still have a patience, my additional questions are, how >>>> can I >>>> retrieve a coordinates (the same code as previously pasted in this >>>> message) >>>> of all points used to draw a lines, after rotating my molecule? >>> >>> If you are just moving the camera, then the point positions will not >>> change. If you are moving the actor, the points in your molecule >>> data >>> will also not change: all that changes is that the actor tells the >>> GPU >>> to apply a matrix describing the position/orientation/size of the >>> geometry before drawing it. To get the points as they appear to be >>> positioned in the screen, you can apply that same matrix that the >>> actor uses to your data set. Do this by getting the transformation >>> matrix with vtkActor->GetMatrix() and set that up in a >>> vtkTransformFilter like this (forgive me if this isn't absolutely >>> correct Python): >>> >>> transform = vtkMatrixToLinearTransform() >>> transform.SetMatrix(actor->GetMatrix()) >>> transformFilter = vtkTransformFilter() >>> transformFilter.SetTransform(transform) >>> transformFilter.SetInput(moleculeGeometry) >>> transformFilter.Update() >>> >>> rotatedMolecule = transformFilter.GetOutput() >>> rotatedMolecule.Update() # might not be necessary >>> >>> for i in xrange(rotatedMolecule.GetNumberOfPoints()): >>> pt = rotatedMolecule.GetPoint(i) >>> # Do something with point >>> >>> This assumes you have the molecule line geometry stored in a >>> vtkPolyData. The transform filter applies the same transformation >>> matrix that was applied to the actor that you manipulated. I hope >>> that >>> I didn't make this too confusing. I am doing this very thing in an >>> application, so I know that it works. >>> >>>> And the last one, as I mentioned earlier, I was able to set actor >>>> VisibilityOff() property from my GUI, but the change is made only >>>> after I >>>> move mouse over the rendering window. How can I update window >>>> right after >>>> the property has been set? >>>> I tried >>>> my_actor.GetMapper().GetInput().Update() >>>> ren.Render() >>>> ren.Render().Update() >>>> >>>> ren is QVTKWindowInteractor instance. I guess this is the source >>>> of my >>>> problem, while there are only a few methods overloaded. >>> >>> Try ren->GetRenderWindow()->Render() >>> >>> Cory >>> >>>> >>>> I'd appreciate any pointers, which method I should add there so >>>> that >>>> updating will work. >>>> >>>> Thank you, >>>> Piotr Byzia >>>> >>>> >>>> >>>> On 05.11.2009, at 13:52, Cory Quammen wrote: >>>> >>>>> Piotr, >>>>> >>>>> The interactor style you have let's you switch between two >>>>> modes. In >>>>> one mode, you are moving the camera. Mouse motions in the window >>>>> will >>>>> affect the camera, but it will not change the actors position or >>>>> orientation in world space. Sure, they appear to move on the >>>>> screen, >>>>> but what you see really comes from the camera moving. In this >>>>> mode, >>>>> calling PickableOff() won't have any effect because you aren't >>>>> picking >>>>> any actors. >>>>> >>>>> The other mode, however, lets you pick individual actors and >>>>> change >>>>> their position, orientation, and scale in world space. For this >>>>> mode, >>>>> you *can* pick actors and change these properties. Calling >>>>> PickableOff() will have an effect here; it will prevent you from >>>>> picking and subsequently modifying the actor position, >>>>> orientation, >>>>> and scale. >>>>> >>>>> In your code, the first mode is what you have. To see what the >>>>> second >>>>> mode is like, you might try >>>>> >>>>> >>>>> >>>>> widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle >>>>> ().SetCurrentStyleToTrackballActor() >>>>> >>>>> This mode will let you manipulate individual actors, unless of >>>>> course >>>>> you set them to PickableOff(). This seems to me close to what >>>>> are you >>>>> going for. >>>>> >>>>> I hope that helps, >>>>> Cory >>>>> >>>>> On Thu, Nov 5, 2009 at 5:48 AM, Piotr Byzia >>>>> <piotr.byzia@...> >>>>> wrote: >>>>>> >>>>>> Hi Karthik, >>>>>> I disabled the interactor style, however I still can rotate my >>>>>> actor >>>>>> (by >>>>>> the >>>>>> mouse interaction). >>>>>> This's what I've done: >>>>>> >>>>>> >>>>>> widget_3d.GetRenderWindow().GetInteractor().GetInteractorStyle >>>>>> ().EnabledOff() >>>>>> my_actor.PickableOff() >>>>>> widget_3d is an instance of >>>>>> QVTKRenderWindowInteractor.QVTKRenderWindowInteractor(self) >>>>>> Below is an output >>>>>> for widget_3d.GetRenderWindow().GetInteractor >>>>>> ().GetInteractorStyle() >>>>>> Let me know if there is any other information which might help. >>>>>> vtkInteractorStyleSwitch (0E995418) >>>>>> Debug: Off >>>>>> Modified Time: 945 >>>>>> Reference Count: 2 >>>>>> Registered Events: (none) >>>>>> Current Renderer: 00000000 >>>>>> Default Renderer: 00000000 >>>>>> Enabled: 0 >>>>>> Priority: 0 >>>>>> Interactor: 0E9418D0 >>>>>> Key Press Activation: Off >>>>>> Key Press Activation Value: i >>>>>> Auto Adjust Camera Clipping Range On >>>>>> Pick Color: (1, 0, 0) >>>>>> CurrentRenderer: 00000000 >>>>>> Picked Renderer: (none) >>>>>> Current Actor: (none) >>>>>> Interactor: 0E9418D0 >>>>>> Prop Picked: No >>>>>> State: 0 >>>>>> UseTimers: 0 >>>>>> HandleObservers: 1 >>>>>> MouseWheelMotionFactor: 1 >>>>>> Timer Duration: 10 >>>>>> CurrentStyle 0E9A3818 >>>>>> vtkInteractorStyleTrackballCamera >>>>>> Debug: Off >>>>>> Modified Time: 1703 >>>>>> Reference Count: 1 >>>>>> Registered Events: >>>>>> Registered Observers: >>>>>> vtkObserver (0E9912B8) >>>>>> Event: 41 >>>>>> EventName: EndInteractionEvent >>>>>> Command: 0E9A58E0 >>>>>> Priority: 0 >>>>>> Tag: 2 >>>>>> vtkObserver (0E9906B0) >>>>>> Event: 39 >>>>>> EventName: StartInteractionEvent >>>>>> Command: 0E9A58E0 >>>>>> Priority: 0 >>>>>> Tag: 1 >>>>>> Current Renderer: 00000000 >>>>>> Default Renderer: 00000000 >>>>>> Enabled: 0 >>>>>> Priority: 0 >>>>>> Interactor: 0E9418D0 >>>>>> Key Press Activation: Off >>>>>> Key Press Activation Value: i >>>>>> Auto Adjust Camera Clipping Range On >>>>>> Pick Color: (1, 0, 0) >>>>>> CurrentRenderer: 00000000 >>>>>> Picked Renderer: (none) >>>>>> Current Actor: (none) >>>>>> Interactor: 0E9418D0 >>>>>> Prop Picked: No >>>>>> State: 0 >>>>>> UseTimers: 0 >>>>>> HandleObservers: 1 >>>>>> MouseWheelMotionFactor: 1 >>>>>> Timer Duration: 10 >>>>>> MotionFactor: 10 >>>>>> >>>>>> >>>>>> On 04.11.2009, at 18:25, Karthik Krishnan wrote: >>>>>> >>>>>> try to disable the interactor style set on teh interactor >>>>>> >>>>>> interactor->GetInteractorStyle()->EnabledOff() >>>>>> >>>>>> On Wed, Nov 4, 2009 at 10:35 AM, Piotr Byzia <piotr.byzia@... >>>>>> > >>>>>> wrote: >>>>>>> >>>>>>> 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@... >>>>>>>> > >>>>>>>> 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 >>>>>>>>> _______________________________________________ >>>>>>>>> Powered by www.kitware.com >>>>>>>>> >>>>>>>>> Visit other Kitware open-source projects at >>>>>>>>> http://www.kitware.com/opensource/opensource.html >>>>>>>>> >>>>>>>>> Please keep messages on-topic and check the VTK FAQ at: >>>>>>>>> http://www.vtk.org/Wiki/VTK_FAQ >>>>>>>>> >>>>>>>>> Follow this link to subscribe/unsubscribe: >>>>>>>>> http://www.vtk.org/mailman/listinfo/vtkusers >>>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> >>>>>>>> -- >>>>>>>> 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 >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Powered by www.kitware.com >>>>>>> >>>>>>> Visit other Kitware open-source projects at >>>>>>> http://www.kitware.com/opensource/opensource.html >>>>>>> >>>>>>> Please keep messages on-topic and check the VTK FAQ at: >>>>>>> http://www.vtk.org/Wiki/VTK_FAQ >>>>>>> >>>>>>> Follow this link to subscribe/unsubscribe: >>>>>>> http://www.vtk.org/mailman/listinfo/vtkusers >>>>>> >>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> >>>>> -- >>>>> 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 >>>> >>>> >>> >>> >>> >>> -- >>> 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 >> >> > > > > -- > 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 _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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Re: Actor -- isMovable?
by David Doria-2
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I made some examples of these things:
http://www.vtk.org/Wiki/Moving_an_Actor http://www.vtk.org/Wiki/Moving_the_Camera I hope they help clarify. Thanks, David _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ Follow this link to subscribe/unsubscribe: http://www.vtk.org/mailman/listinfo/vtkusers |
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