[vtk-developers] Performance slow down

[Francois Bertel]

The problem is there is no modification time specific to a part of the
actor (in this case, the transform and ivar modifiying it are part of
the vtkProp3D (superclass of vtkActor)).

On Thu, Jul 24, 2008 at 12:38 PM, Jeff Baumes <jeff.baumes at kitware.com> wrote:
> I've seen this issue before where textures were being reloaded every
> frame because someone had added a
>
> || this->Renderer->MTime() > blah
>
> to the if statement for reloading the texture, and the renderer was
> actually being modified every frame. It looks like in this case it is
> really just a specific part of the vtkActor that Francios is checking
> for modification. Something in the actor is changing in your program
> every frame, but not the part of the actor that should really make
> that "if" pass. The condition should probably be more restrictive and
> only pass if certain parts of the actor are modified.
>
> Jeff
>
>
> On Thu, Jul 24, 2008 at 12:22 PM, Mathieu Coursolle
> <mcoursolle at rogue-research.com> wrote:
>> Hi,
>>
>> I've track down the source of the problem to this change:
>>
>> http://public.kitware.com/cgi-bin/viewcvs.cgi/Rendering/vtkOpenGLDisplayListPainter.cxx?r1=1.7&r2=1.8
>>
>> For some reason, if I undo this single change, it is rendering as fast as
>> before.
>>
>> Anybody knows what the problem might be?
>>
>> Thanks!
>>
>> Mathieu
>>
>>
>>
>> On 24-Jul-08, at 11:07 AM, Mathieu Coursolle wrote:
>>
>>> Hi vtk-dev,
>>>
>>> I am developing a Cocoa application on Mac OSX 10.5 based on VTK.
>>> I usually update from CVS once in a while to have the recent fixes
>>> and features.
>>>
>>> I updated yesterday and rendering a vtkPolyData is now very slow.
>>> It use to be quite fast with my 2 weeks old version.
>>>
>>> I used the Shark tool to check in which part of the code it was spending
>>> all
>>> this time, and it resulted in the OpenGL API.
>>>
>>> Any idea of which last days commit might have cause this?
>>>
>>> Thanks!
>>>
>>> Mathieu
>>> _______________________________________________
>>> vtk-developers mailing list
>>> vtk-developers at vtk.org
>>> http://www.vtk.org/mailman/listinfo/vtk-developers
>>>
>>
>> _______________________________________________
>> vtk-developers mailing list
>> vtk-developers at vtk.org
>> http://www.vtk.org/mailman/listinfo/vtk-developers
>>
>
>
>
> --
> Jeff Baumes, Ph.D.
> R&D Engineer, Kitware Inc.
> (518) 371-3971 x132
> jeff.baumes at kitware.com
> _______________________________________________
> vtk-developers mailing list
> vtk-developers at vtk.org
> http://www.vtk.org/mailman/listinfo/vtk-developers
>



-- 
François Bertel, PhD | Kitware Inc. Suite 204
1 (518) 371 3971 x113 | 28 Corporate Drive
 | Clifton Park NY 12065, USA