[vtkusers] VTK slow to display 300 vtkArrowSource in real-time

[David E DeMarle]

It sounds like you are using 300 arrow sources and 300 actors. This is
expected to be very slow because of the overhead that each of the 300
actors brings.

The first thing I suggest you do is to  use either the append polydata
filter, or better still glyph filter, and better still the glyph mapper, to
render all of them simultaneously.



David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

On Tue, Oct 11, 2016 at 12:25 PM, Olivier Ameline <olivameline at gmail.com>
wrote:

> Hello everyone,
>
> I am using VTK for real-time deformation of an elastic rod.
>
> To do this, I need to display simultaneously 300 vtkArrowSources every 100
> ms (10 Hz).
> Thus, I initialize the 300 vtkArrowSources, then I update them in a thread
> by translating and
> rotating their actors (with the functions setPosition and RotateWXYZ).
>
> The problem is that VTK takes apparently more than 100 ms to compute the
> updating, leading to
> a quite slow application.
>
> Is there a way to optimize the VTK rendering in real-time ?
>
> Thanks for your help.
>
> Best regards,
>
> Olivier Ameline
> Sorbonne Universités, UPMC University Paris 06
>
>
>
>
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