<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">I wrote a blog post which shows how to do that. Take a look at <a href="http://pyscience.wordpress.com/2014/10/05/from-ray-casting-to-ray-tracing-with-python-and-vtk/" class="">http://pyscience.wordpress.com/2014/10/05/from-ray-casting-to-ray-tracing-with-python-and-vtk/</a><div class=""><br class=""></div><div class="">Cheers,</div><div class="">Adam</div><div class=""><br class=""><div><blockquote type="cite" class=""><div class="">On Oct 30, 2014, at 1:33 PM, Lin M <<a href="mailto:majcjc@gmail.com" class="">majcjc@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi all,<div class=""><br class=""></div><div class="">I'm trying to vis the normal vectos of polydata as arrows. Is there any convenient way to achieve this? I read the example <a href="http://www.vtk.org/Wiki/VTK/Examples/Cxx/GeometricObjects/OrientedArrow" class="">http://www.vtk.org/Wiki/VTK/Examples/Cxx/GeometricObjects/OrientedArrow</a> here, but I still don't understand how to do this. It seems to vis one arrow we need to follow quite a lot steps. I think my problem is the same with <a href="http://vtk.1045678.n5.nabble.com/vtkglyph3D-with-arrowsource-td1247920.html" class="">http://vtk.1045678.n5.nabble.com/vtkglyph3D-with-arrowsource-td1247920.html</a> , though there is no answer below. :-(</div><div class=""><br class=""></div><div class="">Can anyone give me some advice? Thank you very much!</div><div class=""><br class=""></div><div class="">Best,</div><div class="">Lin</div></div>
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