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<p class="MsoNormal"><span lang="EN-US">Dear all,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I am trying to add Gmsh as a library to my C++code in order to get a tetrahedral mesh of a given volume; this volume is bounded by an STL triangulation.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have compiled the source code to get a library, but the problem comes when I try to read this stl file from my program because I get a SEGFAULT error.<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">I have created a .geo file:<o:p></o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US">Merge "CUBIC.stl";<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US">Merge "CUBIC_SPHERE.stl";<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US">Surface Loop(3) = {1};<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US">Surface Loop(4) = {2};<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US">Volume(5) = {3, 4};<o:p></o:p></span></b></p>
<p class="MsoNormal"><b><span lang="EN-US"><o:p> </o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US">If I try to read a different format for the surface mesh (.wrl), the mesh generation succeeds. And the problem is happening with all stl files I have tested so far.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I run the same .geo file from the gmsh GUI (precompiled for Linux) the mesh generation succeeds as well (even with stl file, so I guess that the file is not corrupted)<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">My C++ code is the same as mainSIMPLE.cpp given in the api_demos except that I change the name of the .geo file to be read.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have tried to debug the problem but I cannot figure out the origin of the problem; the last function called is
<b>compare (MVertex* v0, MVertex* v1)</b>, called during the generation of the face (<b>MFace::MFace
</b>and<b> sortVertices</b>) while reading the stl file (<b>GModel::readSTL</b>)<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">To build the library I have tried different options:
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">the minimal -DDEFAULT=0 -DENABLE_BUILD_LIB=1 -DENABLE_BUILD_SHARED=1 (as suggested in README.txt)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">and to include these packages:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ENABLE_BLAS_LAPACK<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ENABLE_BUILD_LIB<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">ENABLE_BUILD_SHARED<o:p></o:p></span></p>
<p class="MsoNormal">ENABLE_MATHEX<o:p></o:p></p>
<p class="MsoNormal">ENABLE_MESH<o:p></o:p></p>
<p class="MsoNormal">ENABLE_NETGEN<o:p></o:p></p>
<p class="MsoNormal">ENABLE_NUMPY<o:p></o:p></p>
<p class="MsoNormal">ENABLE_OCC<o:p></o:p></p>
<p class="MsoNormal">ENABLE_PARSER<o:p></o:p></p>
<p class="MsoNormal">ENABLE_SGEOM<o:p></o:p></p>
<p class="MsoNormal">ENABLE_TETGEN<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">Has anyone already encountered a similar problem or a suggestion on what is going wrong ? I suppose that I am missing a dependency but I cannot find a solution to read the STL files.<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">Thanks for your help,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Simone<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:22.0pt;font-family:"Helvetica","sans-serif";color:gray;mso-fareast-language:EN-GB">U</span></u><span style="font-size:22.0pt;font-family:"Helvetica","sans-serif";color:#A80039;mso-fareast-language:EN-GB">MONS</span><span style="font-size:22.0pt;color:#A80039;mso-fareast-language:EN-GB"><br>
</span><u><span style="font-size:8.0pt;color:gray;mso-fareast-language:EN-GB">____________________________________<br>
</span></u><b><span style="font-size:10.0pt;color:#969696;mso-fareast-language:EN-GB">Simone GREMMO<br>
</span></b><b><span style="font-size:10.0pt;color:gray;mso-fareast-language:EN-GB">Université de Mons<br>
</span></b><span style="font-size:10.0pt;color:#A80039;mso-fareast-language:EN-GB">Service Fluides-Machines<o:p></o:p></span></p>
<p class="MsoNormal"><u><span style="font-size:8.0pt;color:gray;mso-fareast-language:EN-GB">___________________________________</span></u><span style="font-family:"Helvetica","sans-serif";color:gray;mso-fareast-language:EN-GB"><o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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