Thank you for your response. But that is quite unexpected, since the normal vectors define the volume. So my question is, how can I make all the normal vectors point outward the volume? I am working with boundary element method and the normal vector orientation is really important to the method.
Thanks in advance, On Thu, May 17, 2018 at 3:54 AM, Christophe Geuzaine <[email protected]> wrote: > > > > On 16 May 2018, at 00:28, Anderson Gabriel Santiago < > [email protected]> wrote: > > > > Dear all, > > > > I am using GMSH to create a 3D surface mesh. For some unknown reason, > some normal vectors points inwards, not outwards, > > The mesh is oriented according to the orientation of the geometrical > surface - everything is correct in your file. You can check by visualizing > both the geometry and the mesh normals (in Tools->Options->Geometry or > Mesh->Visibility->Normals) > > Christophe > > > > as I would expect, since I defined a solid limited by plane surfaces. > > > > Here is the GEO file I created using the GMSH GUI. > > > > > > // Gmsh project created on Tue May 15 19:19:43 2018 > > SetFactory("OpenCASCADE"); > > //+ > > Point(1) = {0, 0, 0, 1.0}; > > //+ > > Point(2) = {1, 0, 0, 1.0}; > > //+ > > Point(3) = {1, 1, 0, 1.0}; > > //+ > > Point(4) = {0, 1, 0, 1.0}; > > //+ > > Point(5) = {0, 0, 1, 1.0}; > > //+ > > Point(6) = {1, 0, 1, 1.0}; > > //+ > > Point(7) = {1, 1, 1, 1.0}; > > //+ > > Point(8) = {0, 1, 1, 1.0}; > > //+ > > Line(1) = {1, 2}; > > //+ > > Line(2) = {2, 6}; > > //+ > > Line(3) = {6, 5}; > > //+ > > Line(4) = {5, 1}; > > //+ > > Line(5) = {5, 8}; > > //+ > > Line(6) = {8, 4}; > > //+ > > Line(7) = {4, 1}; > > //+ > > Line(8) = {8, 7}; > > //+ > > Line(9) = {7, 3}; > > //+ > > Line(10) = {3, 4}; > > //+ > > Line(11) = {6, 7}; > > //+ > > Line(12) = {3, 2}; > > //+ > > Line Loop(1) = {4, -7, -6, -5}; > > //+ > > Plane Surface(1) = {1}; > > //+ > > Line Loop(2) = {2, 11, 9, 12}; > > //+ > > Plane Surface(2) = {2}; > > //+ > > Line Loop(3) = {3, 5, 8, -11}; > > //+ > > Plane Surface(3) = {3}; > > //+ > > Line Loop(4) = {10, 7, 1, -12}; > > //+ > > Plane Surface(4) = {4}; > > //+ > > Line Loop(5) = {9, 10, -6, 8}; > > //+ > > Plane Surface(5) = {5}; > > //+ > > Line Loop(6) = {3, 4, 1, 2}; > > //+ > > Plane Surface(6) = {6}; > > //+ > > Surface Loop(1) = {4, 5, 2, 6, 3, 1}; > > //+ > > Volume(1) = {1}; > > //+ > > Physical Surface(1) = {6}; > > //+ > > Physical Surface(2) = {4, 2, 3, 1}; > > //+ > > Physical Surface(3) = {5}; > > //+ > > Physical Volume(4) = {1}; > > > > Any help is appreciated. > > > > -- > > Anderson Gabriel Santiago > > > > > > ~"If you are depressed, > > you are living in the past. > > If you are anxious, > > you are living in the future. > > If you are at peace, > > you are living in the present."~ - Lao Tzu > > _______________________________________________ > > gmsh mailing list > > [email protected] > > http://onelab.info/mailman/listinfo/gmsh > > -- Anderson Gabriel Santiago, Ph.D., E.E. Adjunct Professor, Biomedical Engineering - UFABC [email protected] <[email protected]> Cel.: +55 11 99801-0881 <%2811%29%2099801-0881> ~"If you are depressed, you are living in the past. If you are anxious, you are living in the future. If you are at peace, you are living in the present."~ - Lao Tzu
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