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<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">The example you give describes very well the purpose of our interface elements. We insert such an element to model the discontinuity, and hence the element consists of two ‘sides’ each connected
to one of the regular elements between which the discontinuity exists. <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:JA">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif";mso-fareast-language:JA"> John Platt [mailto:jcplatt@dsl.pipex.com]
<br>
<b>Sent:</b> Tuesday, April 05, 2011 10:04 AM<br>
<b>To:</b> Andreas Buykx; vtk-developers@vtk.org<br>
<b>Subject:</b> Re: [vtk-developers] interface elements<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">Andreas,</span><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">You might like to consider creating separate unstructured grids for your elements depending on their visual display characteristics. For example, a
mass element could be shown as a sphere with diameter proportional to the mass. Actors for each sub grid can then be added to a prop collection or assembly. You can also make each grid share the same points and point data even though they will be "oversize"
for the sub grids. However, this does lead to greater programming complexity.</span><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">If any of your point data is discontinuous, for example, stress components between dissimilar materials, you should ponder this problem at an early
stage.</span><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"> <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">John.</span><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">----- Original Message -----
<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:#E4E4E4"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">From:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">
<a href="mailto:A.Buykx@tnodiana.com" title="A.Buykx@tnodiana.com">Andreas Buykx</a>
<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">To:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">
<a href="mailto:vtk-developers@vtk.org" title="vtk-developers@vtk.org">vtk-developers@vtk.org</a>
<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">Sent:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA"> Monday, April 04, 2011 1:38 PM<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA">Subject:</span></b><span style="font-size:10.0pt;font-family:"Arial","sans-serif";mso-fareast-language:JA"> [vtk-developers] interface elements<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:12.0pt;font-family:"MS PGothic","sans-serif";mso-fareast-language:JA"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span lang="EN-US">Our finite-element application has ‘interface elements’ which are used to model discontinuities between ‘conventional’ elements. We would like to be able to visualize these as transparent elements with one or more lines
connecting the sides of the interface element. For this we need to filter such elements and process them in a proper way. What would the preferred way of discriminating between interface and conventional elements be? Should we add a boolean attribute to each
cell specifying whether it is an interface element?</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">Thanks,</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:NL">Andreas Buykx</span></b><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial","sans-serif";color:black;mso-fareast-language:NL">Senior Software Engineer</span><o:p></o:p></p>
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.5pt;font-family:"Arial","sans-serif";color:#CB2027;mso-fareast-language:NL">TNO DIANA BV
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