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</o:shapelayout></xml><![endif]--></head><body lang=SK link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>I have two main renderers and two overlay renderers. The main renderers contain multiple actors with 100+ k polygons and volume rendering and everything is fast and without delay (on nvidia gtx770). I’m also using point picking that calls FindPokedRenderer on every mouse move without any problems.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Which os and qt version are you using? There is some problem with qt 5.5 in latest ubuntu that is causing delays with mouse interection. I’m using qt5.7 from <a href="https://launchpad.net/~beineri/+archive/ubuntu/opt-qt57-xenial">https://launchpad.net/~beineri/+archive/ubuntu/opt-qt57-xenial</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Robert<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><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'> Miroslav Drahos [mailto:mdrahos@aurisrobotics.com] <br><b>Sent:</b> Friday, December 9, 2016 10:27 PM<br><b>To:</b> Róbert Špir <spir.robert@gmail.com>; vtkusers@vtk.org<br><b>Subject:</b> Re: [vtkusers] interactor with one renwin and multiple renderers<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div id=divtagdefaultwrapper><p><span style='font-family:"Calibri",sans-serif;color:black'>Hi Robert,<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>thanks for the reply, it makes sense. From your experience, would you say it is worth the effort for ~6 views? Would you say the performance improvement is noticeable and worth the extra effort? I did some experiments, and I get a bit of a delay on interaction; between the mouse down and the scene starting to rotate (using stock vtkInteractorStyleTrackballCamera for now). I am guessing it may be the FindPokedRenderer() taking time to figure out which renderer the interaction falls into... Some of my viewports also have a vtkOrientationMarkerWidget, which creates its own renderer, and a couple views have overlay (non-interactive) renderer as well, so the total number of renderers is even higher, maybe 12 altogether.<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>Thank you!<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>Miro<o:p></o:p></span></p></div><div class=MsoNormal align=center style='text-align:center'><hr size=2 width="98%" align=center></div><div id=divRplyFwdMsg><p class=MsoNormal><b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'>From:</span></b><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;color:black'> Róbert Špir <<a href="mailto:spir.robert@gmail.com">spir.robert@gmail.com</a>><br><b>Sent:</b> Thursday, December 8, 2016 8:49:10 PM<br><b>To:</b> Miroslav Drahos; <a href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</a><br><b>Subject:</b> RE: [vtkusers] interactor with one renwin and multiple renderers</span> <o:p></o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div></div><div><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Hi Miro,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>I’m doing similar task. You can derive your own interactorstyle class from one of the vtkInteractorStyle classes. There you can override mouse and key event functions and using this->Interactor->FindPokedRenderer(mouseX, mouseY); you can detect to which of the multiple renderers the user clicked and handle the interaction according to your needs.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'>Robert<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri",sans-serif;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><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 [<a href="mailto:vtkusers-bounces@vtk.org">mailto:vtkusers-bounces@vtk.org</a>] <b>On Behalf Of </b>Miroslav Drahos<br><b>Sent:</b> Thursday, December 8, 2016 10:44 PM<br><b>To:</b> <a href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</a><br><b>Subject:</b> [vtkusers] interactor with one renwin and multiple renderers<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div id=divtagdefaultwrapper><p><span style='font-family:"Calibri",sans-serif;color:black'>Hi VTK folks,<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>I am trying to optimize my application, and am thinking to replace multiple QVTKWidget2 instances with only one widget + multiple viewports/renderers. Then I could issue only one expensive call to vtkRenderWindow::Render() and re-draw everything.<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>I saw the example for multiple viewports (<a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/MultipleViewports" id=LPlnk960727>http://www.vtk.org/Wiki/VTK/Examples/Cxx/Visualization/MultipleViewports</a>) and it all looks very straightforward, but...<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>How do I handle interaction? Let's say in a typical quad view setup of a medical application, with 3 orthogonal slices and one 3D view there are different interactor styles needed. But it is the renderwindow that provides interactor, so in the tiled version I would end up with only one common interactor/interactor style.<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>Any advice is greatly appreciated!<o:p></o:p></span></p><p><span style='font-family:"Calibri",sans-serif;color:black'>Miro<o:p></o:p></span></p></div></div></div></body></html>