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<p class="MsoNormal"><span style="color:#1F497D">It seems like there is no way to do that, at least I didn’t find one and I got no response so far. So I’ll create two actors: one for meshes with surface-normals (gouraud shading) and one for edges without normals
(flat shading).<o:p></o:p></span></p>
<p class="MsoNormal"><a name="_MailEndCompose"><span style="color:#1F497D"><o:p> </o:p></span></a></p>
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<p class="MsoNormal"><b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DE-CH">Von:</span></b><span lang="DE" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:DE-CH"> Affolter Martin
<br>
<b>Gesendet:</b> Mittwoch, 8. August 2012 14:48<br>
<b>An:</b> VTK Users (vtkusers@vtk.org)<br>
<b>Betreff:</b> Gouraud Shading on combined actor<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Hi vtkusers,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I combine vtkPolydata (meshes including normals, tessellated edges, vertices) with the vtkAppendPolyDataFilter and use one single actor to visualize it. Unfortunately vtkAppendPolyDataFilter removes the meshes‘ normals, beause the edges
and vertices do not come with normals. This is a problem, since Gouraud-shading needs normals at the meshes’ points in order to work.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>One solution would be to visualize meshes and edges/vertices separately (one actor for the meshes, one for edges/vertices), but I’d really like to stick with the single actor.<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo2"><![if !supportLists]><span style="mso-list:Ignore">-<span style="font:7.0pt "Times New Roman"">
</span></span><![endif]>I tried providing the missing normals to the edges and vertices so that the vtkAppendPolyDataFilter wouldn’t remove the meshes‘ normals. It worked, but then I have Gouraud-shading on the edges and vertices too, which is not what I wanted
(flat shading for edges and vertices gives much better contrast for CAD-tools).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What I’m looking for is Gouraud-shading for meshes only while still being able to combine them with edges and vertices into one single actor. Is this possible? Any ideas how to accomplish that?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks.<o:p></o:p></p>
<p class="MsoNormal" style="mso-margin-top-alt:auto;mso-margin-bottom-alt:auto"><span style="font-size:10.0pt;mso-fareast-language:DE-CH">Martin Affolter<br>
Dipl. Ing FH<br>
Wissenschaftlicher Mitarbeiter<br>
<span style="color:#999999">___________________________________________<br>
</span><span style="color:gray">NTB Interstaatliche Hochschule für Technik Buchs <br>
Institut für Ingenieurinformatik<br>
Schönauweg 4<br>
CH-9013 St. Gallen<br>
<br>
Tel: +41 81 755 32 49</span><span style="color:#999999"> <br>
</span><span style="color:gray">Web:</span><span style="color:#999999"> <u><a href="http://www.ntb.ch/">http://www.ntb.ch</a></u></span></span><span style="mso-fareast-language:DE-CH"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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