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<p class="MsoNormal">Dear All<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">After a tesselation using cgal library (delaunay_2), I used gmsh (</span><a href="http://gmsh.info/"><span lang="EN-US">http://gmsh.info/</span></a><span lang="EN-US">) to plot the triangles … just an idea of sharing
about 2 powerful tools :-)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">(useful with a huge amount of nodes)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">A basic “saddle” surface has been used to test it<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Hope it help<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Paul<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">###############################################################################<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">clc</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#32B9B9">mode</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">0</span><span style="color:#4A55DB">)</span><span style="color:black">,</span>
<span style="color:#32B9B9">clear</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">PATH</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">get_absolute_file_path</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">"saddle.sce"</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">mopen</span><span style="color:#4A55DB">(</span><span style="color:black">PATH</span>
<span style="color:#5C5C5C">+</span> <span style="color:rosybrown">"/saddle.msh"</span><span style="color:black">,</span><span style="color:rosybrown">"w"</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// saddle surface</span></i><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#B01813;mso-fareast-language:FR">function</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#4A55DB">[</span><b><span style="color:#834310">z</span></b><span style="color:#4A55DB">]</span><span style="color:#5C5C5C">=</span><u><span style="color:black">saddle</span></u><span style="color:#4A55DB">(</span><b><span style="color:#834310">x</span></b><span style="color:black">,
</span><b><span style="color:#834310">y</span></b><span style="color:#4A55DB">)</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<b><span style="color:#834310">z</span></b> <span style="color:#5C5C5C">=</span> <b>
<span style="color:#834310">x</span></b><span style="color:#5C5C5C">^</span><span style="color:rosybrown">2</span>
<span style="color:#5C5C5C">-</span> <b><span style="color:#834310">y</span></b><span style="color:#5C5C5C">^</span><span style="color:rosybrown">2</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#B01813;mso-fareast-language:FR">endfunction</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">n</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">100</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">x</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <u><span style="color:#AE5CB0">linspace</span></u><span style="color:#4A55DB">(</span><span style="color:#5C5C5C">-</span><span style="color:rosybrown">2</span><span style="color:black">,</span><span style="color:rosybrown">2</span><span style="color:black">,n</span><span style="color:#4A55DB">)</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span>
<i><span style="color:#64AE64">// (n,1) matrix</span></i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">y</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <u><span style="color:#AE5CB0">linspace</span></u><span style="color:#4A55DB">(</span><span style="color:#5C5C5C">-</span><span style="color:rosybrown">1</span><span style="color:black">,</span><span style="color:rosybrown">3</span><span style="color:black">,n</span><span style="color:#4A55DB">)</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span>
<i><span style="color:#64AE64">// (n,1) matrix</span></i><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#4A55DB">(</span><span style="color:rosybrown">1</span><span style="color:#FFAA00">:</span><span style="color:black">n</span><span style="color:#4A55DB">)</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span>
<span style="color:black">j</span> <span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">
ones</span><span style="color:#4A55DB">(</span><span style="color:black">n,</span><span style="color:rosybrown">1</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">X</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:black">x</span> <span style="color:#5C5C5C">
.*.</span> <span style="color:black">j;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">Y</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:black">j</span> <span style="color:#5C5C5C">
.*.</span> <span style="color:black">y;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">Z</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <u><span style="color:black">saddle</span></u><span style="color:#4A55DB">(</span><span style="color:black">X,Y</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// ### plot in gmsh ###</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// Surface number
</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">SurfaceNumber</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">1</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">//tri = delaunay_2(X,Y);</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">triangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">delaunay_2</span><span style="color:#4A55DB">(</span><span style="color:black">X</span><span style="color:#5C5C5C">'</span><span style="color:black">,Y</span><span style="color:#5C5C5C">'</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">NumberOfTriangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">size</span><span style="color:#4A55DB">(</span><span style="color:black">triangles,</span><span style="color:rosybrown">"r"</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$MeshFormat\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"2.2
0 8\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$EndMeshFormat\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// Nodes</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$Nodes\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"%d\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,n</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">*</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">n</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#4A55DB">(</span><span style="color:rosybrown">1</span><span style="color:#FFAA00">:</span><span style="color:black">n</span><span style="color:#5C5C5C">*</span><span style="color:black">n</span><span style="color:#4A55DB">)</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"%d
%g %g %g\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,i,X</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,Y</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,Z</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">))</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$EndNodes\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// elements</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$Elements\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"%d\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,NumberOfTriangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#4A55DB">(</span><span style="color:rosybrown">1</span>
<span style="color:#FFAA00">:</span> <span style="color:black">NumberOfTriangles</span><span style="color:#4A55DB">)</span><span style="color:#5C5C5C">'</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">SurfaceNumber</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:black">SurfaceNumber</span><span style="color:#5C5C5C">*</span><span style="color:#32B9B9">ones</span><span style="color:#4A55DB">(</span><span style="color:black">NumberOfTriangles,</span><span style="color:rosybrown">1</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"%d
2 2 %d %d %d %d %d\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,i,SurfaceNumber,SurfaceNumber,triangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,triangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">,triangles</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">i,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">3</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">))</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mfprintf</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">"$EndElements\n"</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">mclose</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">fich</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#64AE64;mso-fareast-language:FR">// ### plot in scilab ###</span></i><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><u><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AE5CB0;mso-fareast-language:FR">scf</span></u><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:rosybrown;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">drawlater</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">()</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">f</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <u><span style="color:#AE5CB0">gcf</span></u><span style="color:#4A55DB">()</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">f</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">figure_size</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#4A55DB">[</span><span style="color:rosybrown">1000</span><span style="color:black">,</span>
<span style="color:rosybrown">1000</span><span style="color:#4A55DB">]</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">f</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">background</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:#32B9B9">color</span><span style="color:#4A55DB">(</span><span style="color:rosybrown">255</span><span style="color:black">,</span><span style="color:rosybrown">255</span><span style="color:black">,</span><span style="color:rosybrown">255</span><span style="color:#4A55DB">)</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <u><span style="color:#AE5CB0">gca</span></u><span style="color:#4A55DB">()</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">font_size</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">2</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">x_label</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">text</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">'$X$'</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">x_label</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">font_size</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">4</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">y_label</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">text</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">'$Y$'</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">Y_label</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">font_size</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">4</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">z_label</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">text</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">"$\sigma$"</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">a</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">z_label</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#5C5C5C;mso-fareast-language:FR">.</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#AAAAAA;mso-fareast-language:FR">font_size</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:#5C5C5C">=</span> <span style="color:rosybrown">4</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">plot3d</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">(</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">x,</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR">
<span style="color:black">y,</span> <span style="color:#32B9B9">feval</span><span style="color:#4A55DB">(</span><span style="color:black">x,</span>
<span style="color:black">y,</span> <u><span style="color:black">saddle</span></u><span style="color:#4A55DB">))</span><span style="color:black">;</span><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#32B9B9;mso-fareast-language:FR">drawnow</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:#4A55DB;mso-fareast-language:FR">()</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";color:black;mso-fareast-language:FR">;</span><span style="font-size:10.0pt;font-family:"Monospaced","serif";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
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