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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Dear <a href="http://www.montefiore.ulg.ac.be/~geuzaine"><span style='color:windowtext;text-decoration:none'>Christophe </span></a>and <a href="http://perso.uclouvain.be/jean-francois.remacle"><span style='color:windowtext;text-decoration:none'>Jean-François</span></a>,<o:p></o:p></p><p class=MsoNormal>First, thank you for your excellent work to make the even powerful GMSH 2.6.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I notice that you mentioned that other CAD tools such as openCascade should be used to do Boolean operations on primitives, however, I still think it will be very handy if GMSH itself has similar capability. Is there any particular reason that GMSH has no Boolean operations?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Or, if GMSH can find the intersection curve of two surfaces defined by the user, that is good enough for my needs. I tried to cut the skin with CutPlane and got a intersection curve, so maybe that means it is not very hard to find the intersection curve of two surfaces in GMSH, isn’t it? I would like to develop this intersection curve capability in GMSH if you can guide me where I should start, e.g., the documentation of the classes and API’s?<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you so much and looking forward to hearing from you.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>Hongjun Ran, Ph.D.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>Research Engineer II<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>Aerospace Systems Design Laboratory<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>School of Aerospace Engineering<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>Georgia Institute of Technology<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>Atlanta, GA 30332-0150<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;color:#365F91'>(O) 404-385-1041 (M) 404-441-2614<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>