Hi Bea,<br>vtkDelaunay2D works on the presumption that all points lie on 2D plane (Z values are ignored), and then perform constrained Delaunay triangulation. The vertices of the reconstructed 2D mesh are then replaced with true Z values.<br>So, regards to 2D Delaunay, it might be noted that points may NOT be numerically collineation. However, collineation might be quite usually when points are regularly gridded / sampled. In thus situation, a practicable try might be numeric perturbation. That is, record the points (vtkPoints), generate a slight random displacement for each point, triangulate the perturbed points (vtkDelaunay2D), replace the points with original one.<br><br>Good luck.<br><br>Oyster<p>At2017-03-08 15:37:27，段新桥<a href="mailto:sancho@whu.edu.cn" target="_blank">sancho@whu.edu.cn</a>wrote:</p><blockquote name="replyContent" style="padding-left: 1ex;margin: 0px 0px 0px 0.8ex;border-left: 1px solid #ccc;"><div>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">I guess, it’s not possible to send documents with the e-mail? So I skip the document and hope, you can help me nevertheless. Thank you very much in advance!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D">Bea<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p style="FONT-SIZE: 10pt; FONT-FAMILY: Arial"><strong><em>Beatrix Schober</em></strong><br>
Image Acquisition Development <br>
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<strong>STEMMER IMAGING</strong> | Telefon: +49 89 80902-750<br>
<a style="COLOR: #0072bc" href="mailto:b.schober@stemmer-imaging.de">b.schober@stemmer-imaging.de</a> |
<a style="COLOR: #0072bc" href="http://www.stemmer-imaging.de">www.stemmer-imaging.de</a></p>
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<p class="MsoNormal"><b><span style="mso-fareast-language:DE">Von:</span></b><span style="mso-fareast-language:DE"> Schober Beatrix [STEMMER IMAGING GmbH]
<br>
<b>Gesendet:</b> Dienstag, 7. März 2017 17:53<br>
<b>An:</b> <A href="mailto:vtkusers@vtk.org">vtkusers@vtk.org</A><br>
<b>Betreff:</b> vtkDelaunay2D from point cloud<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Hi all,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">I am reading attached image (gray values as z) as point cloud which works fine only displaying the point cloud with 687.371 points (no Delaunay2D filter). As soon as I use the
Delaunay2D filter, I get a stack overflow (from vtkFiltersCore.dll – vtkDelaunay2D::FindTriangle(…)).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">On the other hand, when setting tolerance to 0.001, I get a mesh within 90 seconds. Actually I want to consider all points, or is it useful to set the tolerance? <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Rendering an xyz file with 359.040 points takes 40 seconds (with tolerance = 0.001) with Delaunay2D filter, also too long in a user application.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Rendering an xyz file with 359.040 points takes 12 seconds (without setting tolerance) with Delaunay2D filter. (I do not understand this behaviour.)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Mainly I guess, I am doing something wrong in reading the point cloud and creating the vtkPolyData?<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:#569CD6;mso-fareast-language:DE">void</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">addPoint</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">(</span><span style="font-size:10.0pt;font-family:Consolas;color:#569CD6;mso-fareast-language:DE">double</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">x</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">,</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#569CD6;mso-fareast-language:DE">double</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">y</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">,</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#569CD6;mso-fareast-language:DE">double</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">z</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">)</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">{</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#4EC9B0;mso-fareast-language:DE">vtkIdType</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">id</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">=</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkPoints</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">InsertNextPoint</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">(</span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">x</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">,</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">y</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">,</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">z</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">);</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkDepths</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">InsertNextValue</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">(</span><span style="font-size:10.0pt;font-family:Consolas;color:#7F7F7F;mso-fareast-language:DE">z</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">);</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkCells</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">InsertNextCell</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">(</span><span style="font-size:10.0pt;font-family:Consolas;color:#B5CEA8;mso-fareast-language:DE">1</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">);</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkCells</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">InsertCellPoint</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">(</span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">id</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">);</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p> </o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkCells</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">Modified</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">();</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkPoints</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">Modified</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">();</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"> </span><span style="font-size:10.0pt;font-family:Consolas;color:#DADADA;mso-fareast-language:DE">m_vtkDepths</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">-></span><span style="font-size:10.0pt;font-family:Consolas;color:#C8C8C8;mso-fareast-language:DE">Modified</span><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">();</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal" style="background:#1E1E1E"><span style="font-size:10.0pt;font-family:Consolas;color:#B4B4B4;mso-fareast-language:DE">}</span><span style="font-size:10.0pt;font-family:Consolas;color:gainsboro;mso-fareast-language:DE"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:#569CD6">void</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">createPolyData</span><span style="font-family:Consolas;color:#B4B4B4">()</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:#B4B4B4">{</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkDepths</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetName</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#D69D85">"DepthArray"</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetPoints</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#DADADA">m_vtkPoints</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetVerts</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#DADADA">m_vtkCells</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">GetPointData</span><span style="font-family:Consolas;color:#B4B4B4">()-></span><span style="font-family:Consolas;color:#C8C8C8">SetScalars</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#DADADA">m_vtkDepths</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">GetPointData</span><span style="font-family:Consolas;color:#B4B4B4">()-></span><span style="font-family:Consolas;color:#C8C8C8">SetActiveScalars</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#D69D85">"DepthArray"</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> <o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#569CD6">if</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">GetNumberOfPoints</span><span style="font-family:Consolas;color:#B4B4B4">()</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">></span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0</span><span style="font-family:Consolas;color:#B4B4B4">)</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">{</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#57A64A">// Set vertex (cell) normals</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#4EC9B0">vtkSmartPointer</span><span style="font-family:Consolas;color:#B4B4B4"><</span><span style="font-family:Consolas;color:#4EC9B0">vtkDoubleArray</span><span style="font-family:Consolas;color:#B4B4B4">></span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">=</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#4EC9B0">vtkSmartPointer</span><span style="font-family:Consolas;color:#B4B4B4"><</span><span style="font-family:Consolas;color:#4EC9B0">vtkDoubleArray</span><span style="font-family:Consolas;color:#B4B4B4">>::</span><span style="font-family:Consolas;color:#C8C8C8">New</span><span style="font-family:Consolas;color:#B4B4B4">();</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetNumberOfComponents</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#B5CEA8">3</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#57A64A">//3d normals (ie x,y,z)</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetNumberOfTuples</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">GetNumberOfPoints</span><span style="font-family:Consolas;color:#B4B4B4">());</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> <o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#57A64A">//construct the normal vectors</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#569CD6">double</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN1</span><span style="font-family:Consolas;color:#B4B4B4">[</span><span style="font-family:Consolas;color:#B5CEA8">3</span><span style="font-family:Consolas;color:#B4B4B4">]</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">=</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">{</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">1.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">};</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#569CD6">double</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN2</span><span style="font-family:Consolas;color:#B4B4B4">[</span><span style="font-family:Consolas;color:#B5CEA8">3</span><span style="font-family:Consolas;color:#B4B4B4">]</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">=</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">{</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">1.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">};</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#569CD6">double</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN3</span><span style="font-family:Consolas;color:#B4B4B4">[</span><span style="font-family:Consolas;color:#B5CEA8">3</span><span style="font-family:Consolas;color:#B4B4B4">]</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">=</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">{</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">0.0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B5CEA8">1.0</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">};</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> <o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#57A64A">//add the data to the normals array</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetTuple</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#B5CEA8">0</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN1</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetTuple</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#B5CEA8">1</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN2</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">SetTuple</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#B5CEA8">2</span><span style="font-family:Consolas;color:#B4B4B4">,</span><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#C8C8C8">cN3</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> <o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#57A64A">//add the normals to the cells in the polydata</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#DADADA">m_vtkPolyData</span><span style="font-family:Consolas;color:#B4B4B4">-></span><span style="font-family:Consolas;color:#C8C8C8">GetCellData</span><span style="font-family:Consolas;color:#B4B4B4">()-></span><span style="font-family:Consolas;color:#C8C8C8">SetNormals</span><span style="font-family:Consolas;color:#B4B4B4">(</span><span style="font-family:Consolas;color:#C8C8C8">normalsArray</span><span style="font-family:Consolas;color:#B4B4B4">);</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:gainsboro"> </span><span style="font-family:Consolas;color:#B4B4B4">}</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<pre style="background:#1E1E1E"><span style="font-family:Consolas;color:#B4B4B4">}</span><span style="font-family:Consolas;color:gainsboro"><o:p></o:p></span></pre>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">I am really stuck as I was searching for descriptions, examples etc. since some days now. I hope you can give me as a newbie the right hint.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Thank you very much in advance!<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial",sans-serif">Bea<o:p></o:p></span></p>
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