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<p class="MsoNormal">Dear vtk-users,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">First a disclaimer: I’m quite new to VTK and this is my first post to the users list.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m trying to do the following: read in a list of 3D-coordinates representing a wavy surface as a vtkStructuredGrid, color it according to the elevation and show it. The structured grid has dimensions i=50, j=100, k=1 (note that k=1, the
surface is made up of polygons).<o:p></o:p></p>
<p class="MsoNormal">My first attempt was using the following pipeline:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">[vtkStructuredGrid with points having scalar data: elevation] --> [vtkStructuredGridGeometryFilter] --> [vtkPolyDataNormals] --> [vtkPolyDataMapper] -> [vtkActor]
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">But the result is quite blurred and full of ‘kinks’ between the colored sections (see screenshot_1.png).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">What I want to achieve is something that has smooth/crisp lines along the contourlines, similar to screenshot_2.png. Here the colors change depending on constant elevation. I achieved this picture by cutting the wavy surface using vtkClipPolyData
at 10 different elevations and creating 10 different actors for this (for more clarity see screenshot_3.png).<o:p></o:p></p>
<p class="MsoNormal"><br>
My question is: is there a more simple way to achieve the smooth/crisp lines along contourlines, or is clipping multiple times the only solution? I’ve been trying to do something with vtkMarchingSquares, but this does not act on vtkPolyData only on vtkImageData.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks and best wishes,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Menno<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">PS. I hope the pictures are viewable in the list, if not I can make them available on request.<o:p></o:p></p>
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<td colspan="2"><font color="#7d7d7d" size="2" face="Arial"><img id="IMG1" border="0" align="absMiddle" src="cid:image8299b0.JPG@543071a2.4a89d00c" width="60" height="19"><img id="IMG1" border="0" align="bottom" src="cid:image6531f6.JPG@d95a81f6.4e8cdc1e" width="410" height="26"></font></td>
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<p class="44b69221-e828-4dbc-b3c7-4536c25d5e4f"><font face="Arial"><font size="2" face="Arial"><font color="#7d7d7d">dr. ir. Menno A. Deij</font></font></font></p>
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<p class="44b69221-e828-4dbc-b3c7-4536c25d5e4f"><span style="FONT-SIZE: 10pt"><font face="Arial"><font color="#7d7d7d"></font><span style="color: #7D7D7D; ">Software Engineer</span></font></span></p>
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<td><span style="FONT-SIZE: 10pt"><font color="#7d7d7d" face="Arial">Maritime Simulation Group</font></span></td>
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<p class="44b69221-e828-4dbc-b3c7-4536c25d5e4f"><font color="#7d7d7d" size="2" face="Arial"><strong>MARIN</strong></font></p>
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<td><font color="#7d7d7d" size="2" face="Arial">2, Haagsteeg</font></td>
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<td style="HEIGHT: 17px"><font face="Arial"><font size="2" face="Arial"><font color="#366092"><font color="#7d7d7d">E</font>
<a href="mailto:M.Deij@marin.nl" title="Click to send email to Deij, Menno" target="">
M.Deij@marin.nl</a></font></font></font></td>
<td><font color="#7d7d7d" size="2" face="Arial">P.O. Box 28</font></td>
<td><font color="#7d7d7d" size="2" face="Arial">T +31 317 49 39 11</font></td>
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<td><font color="#7d7d7d" size="2" face="Arial">The Netherlands</font></td>
<td><font color="#7d7d7d" size="2" face="Arial">I </font><a href="http://www.marin.nl" target="_top"><font color="#366092" size="2" face="Arial">www.marin.nl</font></a></td>
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<p class="7e412907-b7ef-495a-bba7-64f13c46a44a"> </p>
<p><font color="#7d7d7d" size="2" face="Arial">MARIN news: </font><span style="font-family:Arial; font-size:x-small; color: #366092; "><span style="color: #366092; text-decoration: underline; "><span style="color: #366092; text-decoration: underline; "><a href="http://www.marin.nl/web/News/News-items/Practical-Application-Viscousflow-Calculations-for-Simulation-of-Manoeuvring-Ships.htm" title="" target=""><span style="color: #366092; text-decoration: underline; ">Practical
Application Viscous-flow Calculations for Simulation of Manoeuvring Ships</span></a></span></span><br>
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