[vtkusers] Animation Conundrum
Bruno da Silva de Oliveira
bruno at esss.com.br
Fri Oct 7 16:09:19 EDT 2005
What I mean by "reproductible test case" is a complete Python program
(and needed files) that can be run from my computer, assuming I have
Python and vtk-4.2 installed.
But from the top of my head I guess the bellow should work. Are you
using any window manager system, or just using the basic vtkWindow's
funcionallity?
Regards,
Mischa Thesberg wrote:
> 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()
>>>>>
>>>>>
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>>
>
--
Bruno da Silva de Oliveira
bruno at esss.com.br
ESSS - Engineering Simulation and Scientific Software
http://www.esss.com.br
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