[vtkusers] Animation Conundrum

[Mischa Thesberg]

Now my code looks as follows:

        def myCallback(obj, string):
            givable = "C:/Conics/1-32-04/9-28-2005 1-32-04 PM-0%d" % 
self.num +".jpg"
            jpgReader.SetFileName(givable)
            atext.SetInput(jpgReader.GetOutput())
            renWin.Render()
            self.num = self.num + 1

        ren.AddActor(triangulation)
        ren.SetBackground(1, 1, 1)
        renWin.SetSize(350, 350)
        iren.AddObserver("TimerEvent", myCallback)
        iren.Initialize()
        iren.Start()
        #t = threading.Timer(0.1,myCallback) # call animate after 0.1 
seconds
        #t.start()

and it seems to work fine when the mouse is held down within the 
interactor however the jpeg's do not progress unless the mouse is held 
down.  How do I have the jpegs' retexture (and at the same rate) 
regardless of whether the mouse is being clicked or not?

Bruno da Silva de Oliveira wrote:

> Hmm, that's the idea. The renderer is not shared in the code below; 
> they're in the same thread. The timer event is triggered by a windows 
> event, like a mouse event for instance.
>
> Can you send a reproductible use case (in Python)?
>
> Mischa Thesberg wrote:
>
>> Are you suggesting a code that is something like this?:
>>
>>        def myCallback():
>>            for i in range(100,260):
>>                #time.sleep(0.03)
>>                givable = "C:/Conics/1-32-04/9-28-2005 1-32-04 PM-0%d" 
>> % i+".jpg"
>>                jpgReader.SetFileName(givable)
>>                atext.SetInput(jpgReader.GetOutput())
>>                renWin.Render()
>>
>>        ren.AddActor(triangulation)
>>        ren.SetBackground(1, 1, 1)
>>        renWin.SetSize(350, 350)
>>        iren.AddObserver("TimerEvent", myCallback)
>>        iren.Initialize()
>>        iren.Start()
>>        t = threading.Timer(0.1,myCallback) # call animate after 0.1 
>> seconds
>>        t.start()
>>
>> when this code runs I get the following error from the prompt
>>
>> ERROR: In 
>> \OCCIviewerSDK\Vtk42\Rendering\vtkWin32OpenGLRenderWindow.cxx, line 22
>> 8
>> vtkWin32OpenGLRenderWindow (00B290B0): wglMakeCurrent failed in 
>> MakeCurrent(), e
>> rror: The requested resource is in use.
>>
>> which seems to me to be a share renderer problem.  Or is my code 
>> using the wrong idea?  Thank you for your help btw
>>
>>
>> Bruno da Silva de Oliveira wrote:
>>
>>> Hi Mischa,
>>>
>>> Try to use a timer. Connect an observer in the 
>>> RenderWindowInteractor listening for the TimerEvent, and in this 
>>> handler change the texture.
>>>
>>> HTH,
>>>
>>> Mischa Thesberg wrote:
>>>
>>>>    This is the same problem I was having before however I still 
>>>> cannot seem to fine a solution to it.  I am simulating the effect 
>>>> of projecting a movie onto a cone by creating a cone object in a 
>>>> render window (with an interactor) and changing the texture (mapped 
>>>> using textureMapToPlane) of the cone about 10 times a second (in 
>>>> other words I loop through a series of sequentially named jpeg's).  
>>>> The problem is that while this animation is occuring (which is 
>>>> always) the interactor is frozen with an hourglass (or if I put the 
>>>> animation in a rudimentary thread the hourglass is gone but I still 
>>>> can't interact).  How do I keep the interactor usable as I 
>>>> constantly change the texture of the cone.  I think a problem with 
>>>> the way I tried to thread has to do with the shared resources 
>>>> between the actor changing textures and the interactor.  If someone 
>>>> could give me some advice it would be much appreciated.  If 
>>>> threading is in fact necessary it would be helpful to have a code 
>>>> snippet or a link to an explicit example.  The pertinent part of my 
>>>> code is below (I have kept all of the commented out stuff just to 
>>>> illustrate the type of stuff I've tried:
>>>>
>>>>        #def myCallback():
>>>>          #  if renWin.GetEventPending():
>>>>            #    renWin.SetAbortRender=1
>>>>
>>>> # Add the actors to the renderer, set the background and size
>>>>        ren.AddActor(triangulation)
>>>>        ren.SetBackground(1, 1, 1)
>>>>        #ren.AddObserver("StartEvent", myCallback)
>>>>        renWin.SetSize(350, 350)
>>>>        #renWin.FullScreenOn()
>>>>        #iren.UpdateSize(700,700)
>>>>        #iren.AddObserver("InteractionEvent", myCallback)
>>>>        iren.Initialize()
>>>>
>>>>        #renWin.Render()
>>>>        iren.Start()
>>>>
>>>>        for i in range(100,260):
>>>>            time.sleep(0.03)
>>>>            #iren.UnRegister(renWin)
>>>>            #iren = None
>>>>            #iren = vtk.vtkRenderWindowInteractor()
>>>>            givable = "C:/Conics/1-32-04/9-28-2005 1-32-04 PM-0%d" % 
>>>> i+".jpg"
>>>>            jpgReader.SetFileName(givable)
>>>>            atext.SetInput(jpgReader.GetOutput())
>>>>            #atext.Render(ren)
>>>>            #ren.Render()
>>>>            renWin.Render()
>>>>            #print iren.GetInitialized()
>>>>            #iren.SetRenderWindow(renWin)
>>>>            #iren.Enable()
>>>>            #iren.Initialize()
>>>>            #iren.Start()
>>>>
>>>>
>>>> _______________________________________________
>>>> This is the private VTK discussion list. Please keep messages 
>>>> on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>>>> Follow this link to subscribe/unsubscribe:
>>>> http://www.vtk.org/mailman/listinfo/vtkusers
>>>>
>>>
>> _______________________________________________
>> This is the private VTK discussion list. Please keep messages 
>> on-topic. Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>> Follow this link to subscribe/unsubscribe:
>> http://www.vtk.org/mailman/listinfo/vtkusers
>>
>