Try with the latest snapshots: the issue seems fixed. Christophe
> On 30 May 2018, at 15:02, Bertrand Thierry <thie...@ljll.math.upmc.fr> wrote: > > Hello Nicu, > > The same problem on my computer. I guess it comes from a tolerance problem > with the boolean operators. > Adding this to your code : > Geometry.ToleranceBoolean = 0.001; > makes it work again. > > (however, I'm not sure if it's the right way to deal with it, maybe someone > else will confirm (ou pas) ?) > > Bert > > On 05/30/2018 12:08 PM, Nicolae Cindea wrote: >> >> Dear all, >> >> I think there is an issue concerning the difference (or the intersection) of >> two volumes. The following code: >> >> // here starts the code >> SetFactory("OpenCASCADE"); >> >> L = 0.5; // cylinder length [0, L] >> l = 1.00; // triangle edge >> r = 0.050; // radius of the sphere >> >> h = l * Sqrt(3) / 2; >> >> Sphere(2) = { 0, 0, 0, r }; >> >> Point(101) = { h / 3, 0, -l / 2 }; >> Point(102) = { h / 3, 0, l / 2 }; >> Point(103) = { -2 * h / 3, 0, 0 }; >> >> Line(201) = { 102, 103 }; >> Line(202) = { 103, 101 }; >> Line(203) = { 101, 102 }; >> >> Line Loop(204) = {201, 202, 203}; >> >> Surface(3) = { 204 }; >> >> Translate { -0.108320, 0, -0.062538 } { Surface{3};} >> out[] = Extrude { 0, L, 0 }{ Surface{3}; }; >> >> >> BooleanDifference(8) = { Volume{3}; Delete; }{ Volume{2}; Delete; }; >> // here ends the code >> >> >> gives the following error "Error : Intersection operation cannot be >> performed". Nevertheless, replacing the line >> Translate { -0.108320, 0, -0.062538 } { Surface{3};} >> by >> Translate { -0.108320, 0, -0.062537 } { Surface{3};} >> the error message disappears and everything work as supposed. >> >> Can somebody reproduce this comportment? Since the above .geo file is >> generated from another language I'm searching a workaround to avoid the >> problematic situations. >> >> Thank you. >> >> Regards, >> Nicolae. >> >> PS: my gmsh -info >> >> Version : 3.0.6 >> License : GNU General Public License >> Build OS : Linux64 >> Build date : 20171105 >> Build host : gmsh.info >> Build options : 64Bit Ann Bamg Bfgs Blas(Generic) Blossom C++11 Chaco >> DIntegration Dlopen Fltk Gmm Jpeg(Fltk) Kbipack Lapack(Generic) >> LinuxJoystick MathEx Med Mesh Metis Mmg3d Mpeg Netgen ONELAB ONELABMetamodel >> OpenCASCADE OpenGL OptHom PETSc Parser Plugins Png(Fltk) Post SLEPc Solver >> Taucs TetGen/BR Tetgen1.5 Voro3D Zlib >> FLTK version : 1.3.4 >> PETSc version : 3.7.5 (complex arithmtic) >> OCC version : 7.1.0 >> MED version : 3.2.0 >> Packaged by : gitlab-runner >> Web site : http://gmsh.info <http://gmsh.info/> >> Mailing list : gmsh@onelab.info <mailto:gmsh@onelab.info> >> >> _______________________________________________ >> gmsh mailing list >> gmsh@onelab.info <mailto:gmsh@onelab.info> >> http://onelab.info/mailman/listinfo/gmsh >> <http://onelab.info/mailman/listinfo/gmsh> > > -- > Bertrand THIERRY > CNRS researcher (Chargé de Recherche) > Laboratoire Jacques-Louis Lions > Sorbonne Université > Office 310, Corridor 15/25 > Tel: +33 (0)1 44 27 72 01 > https://www.ljll.math.upmc.fr/bthierry > <https://www.ljll.math.upmc.fr/bthierry>_______________________________________________ > gmsh mailing list > gmsh@onelab.info > http://onelab.info/mailman/listinfo/gmsh — Prof. Christophe Geuzaine University of Liege, Electrical Engineering and Computer Science http://www.montefiore.ulg.ac.be/~geuzaine Free software: http://gmsh.info | http://getdp.info | http://onelab.info
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