[vtkusers] speed up vtkTransform::SetMatrix by not calling internally Modified twice ??

[Arnaud Gelas]

Hi Maarten,

Thank you very much for your reply!

By mistake, I have connected the Modified event to a Render() call. Although the submitted patch solved the issue, the real problem was in my code…

Thanks,
Arnaud

On Apr 28, 2014, at 5:31 PM, Maarten Beek <beekmaarten at yahoo.com> wrote:

> I didn't think a call to Modified() would cause a call to Update(). I thought updates only happen when the pipeline executes (e.g. after Render() call). So unless you somehow connected a Modified() call to a Render() call, you have no reason to worry.
> Or are you multi-threading...?
> 
> Maarten
> On Monday, April 28, 2014 11:08:09 AM, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
> How about that?
> 
>     http://review.source.kitware.com/15294
> 
> On Apr 28, 2014, at 4:34 PM, Arnaud Gelas <arnaudgelas at gmail.com> wrote:
> 
> > Hi all,
> > 
> > I have a large scene, and it happens that if I set the matrix directory to one vtkTransform, I can see 2 updates of the rendered scene…
> > 
> > It happens cause in vtkTransform::SetMatrix(), the matrix is first set to the identity with one call to Modified, then it sets the matrix and there is another call to Modified.
> > 
> > What would be the preferred way to proceed to make it with a single call to Modified?
> > 
> > Thanks,
> > Arnaud
> 
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