[vtkusers] setOrigin() of plane is slowing the rendering

[Ken Martin]

Changing the origin will cause the plane to rebuild on the next render.
Depending on the resolution/dimensions of the plane that could be costly. A
10x10 plane should be super fast. A 10000x10000 plane I would expect to be
really slow. Not sure if that is the issue, just an idea.

Thanks
Ken

On Tue, Feb 2, 2016 at 12:33 PM, Lonni Besançon <lonni.besancon at gmail.com>
wrote:

> Hello everyone,
>
> I have a question that is related to time performance.
> I am currently using the method SetOrigin() to modify the origin of a plane
> in vtk. When I move other actors using a transform or changing directly the
> UserMatrix I basically encounter no issue at all related to time
> performance.
> However, when it comes to changing the origin of the plane, all my program
> slows down. Would you know if that's normal?
> If that is, what would be an other way to proceed?
>
> I still think that it should not take that long, and that there's something
> wrong.
> Indeed all I get is 3 doubles from an other part of the program (not
> related
> to the rendering, GUI side), and fetch these 3 doubles to the SetOrigin()
> method. This SetOrigin() call is repeated a given number of iterations.
> I have checked that when I comment  this part of the code the rendering is
> just fine and my program runs normally.
>
> I'm using vtk6 and windows (though I don't think this is an OS-related
> issue).
>
> Thanks in advance.
>
>
>
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-- 
Ken Martin PhD
Chairman & CFO
Kitware Inc.
28 Corporate Drive
Clifton Park NY 12065
518 371 3971

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