gp_Lin2d aPrjLine1 = ProjLib::Project(aPlane, *MY_LIN);
gp_Lin2d aPrjLine2 = ProjLib::Project(aPlane, theLine->impl<gp_Lin>());
gp_Lin2d aPrjLine1 = ProjLib::Project(aPlane, *MY_LIN);
gp_Lin2d aPrjLine2 = ProjLib::Project(aPlane, theLine->impl<gp_Lin>());