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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">You may use ctkVTKAbstractView (or copy-paste its rendering mechanism into your code). It has a scheduleRender() method that you call instead of directly calling
Render(). The class makes sure that actual rendering does not happen more frequently than the DesiredUpdateRate set in the render window.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="http://www.commontk.org/docs/html/classctkVTKAbstractView.html">http://www.commontk.org/docs/html/classctkVTKAbstractView.html</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><a href="https://github.com/commontk/CTK/blob/master/Libs/Visualization/VTK/Widgets/ctkVTKAbstractView.h">https://github.com/commontk/CTK/blob/master/Libs/Visualization/VTK/Widgets/ctkVTKAbstractView.h</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Or, you may enable “vsync” in your GPU driver, which delays your rendering thread if it gets rendering request more frequently than the refresh rate of your monitor.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Andras<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> vtkusers <vtkusers-bounces@vtk.org>
<b>On Behalf Of </b>Ken Martin<br>
<b>Sent:</b> Thursday, May 3, 2018 8:40 AM<br>
<b>To:</b> Voigteri <eric.voigt@outlook.de><br>
<b>Cc:</b> vtk <vtkusers@vtk.org><br>
<b>Subject:</b> Re: [vtkusers] Updating color of actor without call renderWindow->Render()<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If the events/actions that cause a color change can happen significantly faster than your render rate then you should break apart the two actions (changing the color and rendering). Have a queue of color changes that you push to and then
on the next render pop all the ones that have accumulated. The rendering can be driven by a timer. That way you can have 500 Hz of color changes and a 30Hz render rate for example.<o:p></o:p></p>
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<p class="MsoNormal">On Thu, May 3, 2018 at 3:53 AM, Voigteri <<a href="mailto:eric.voigt@outlook.de" target="_blank">eric.voigt@outlook.de</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in">
<p class="MsoNormal">Hi all,<br>
<br>
I have a long list of actors and I periodically (very short time intervals)<br>
update the color of these actors with<br>
<br>
actors[i]->GetProperty()->SetColor(r,g,b);<br>
renderWindow->Render() <br>
<br>
after each color change. However, this redraws the entire scene, not just<br>
the actor I am updating and causes my application to become quite sluggish<br>
since the colors can be changed interactively by the user at a fast pace. <br>
<br>
Is there a better/more efficient way to do this? <br>
<br>
Kind regards, <br>
<br>
Eric<br>
<br>
<br>
<br>
--<br>
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<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">-- <o:p></o:p></p>
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<p class="MsoNormal">Ken Martin PhD<o:p></o:p></p>
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<p class="MsoNormal">Distinguished Engineer<br>
<span style="font-size:9.5pt">Kitware Inc.</span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">101 East Weaver Street<br>
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