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<p class="MsoNormal">Hi Gmsh users,<o:p></o:p></p>
<p class="MsoNormal">I have a gmsh format mesh produced in pointwise which I load into gmsh. I wish to reverse the direction of the surface normals on the mesh which I do by options>mesh>color>Reverse all normal, if I set mesh.normals to some non zero value
the normal vector is displayed on the surface mesh and reverse all normal does indeed reverse the vectors direction BUT if I save the mesh out to gmsh msh format with the normals reversed then load it back into gmsh the normal direction is the same as the
original, am I doing something wrong or is what I want to do not possible?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Also Is it possible to only reverse the normals on certain mesh surfaces rather than all?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Is there a way to define Physical groups on a mesh rather than on Geometry if one only has a mesh?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks in advance<o:p></o:p></p>
<p class="MsoNormal">Best regards<o:p></o:p></p>
<p class="MsoNormal">Mark<o:p></o:p></p>
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