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

[Maarten Beek]

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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