274       S1=Segment(_v1=P1,_v2=P2,_nnodes=mx+1);  in sys_plate_diffraction_3D()
275       S2=Segment(_v1=P2,_v2=P3,_nnodes=my+1,_domain_name="sigmaP_1");  in sys_plate_diffraction_3D()
276       S3=Segment(_v1=P3,_v2=P4,_nnodes=mx+1);  in sys_plate_diffraction_3D()
277       S4=Segment(_v1=P4,_v2=P1,_nnodes=my+1,_domain_name="sigmaM_1");  in sys_plate_diffraction_3D()
286          S1=Segment(_v1=P1,_v2=P2,_nnodes=mx+1);  in sys_plate_diffraction_3D()
287          S2=Segment(_v1=P2,_v2=P3,_nnodes=my+1,_domain_name="sigmaP_"+tostring(k+1));  in sys_plate_diffraction_3D()
288          S3=Segment(_v1=P3,_v2=P4,_nnodes=mx+1);  in sys_plate_diffraction_3D()
289          S4=Segment(_v1=P4,_v2=P1,_nnodes=my+1,_domain_name="sigmaM_"+tostring(k+1));  in sys_plate_diffraction_3D()
302    S1 = Segment(_v1=P1,_v2=P2,_nnodes=mx+1);  in sys_plate_diffraction_3D()
303    S2 = Segment(_v1=P2,_v2=P3,_nnodes=my+1,_domain_name="sigmaP_"+tostring(np));  in sys_plate_diffraction_3D()
304    S4 = Segment(_v1=P4,_v2=P1,_nnodes=my+1,_domain_name="sigmaM_"+tostring(np));  in sys_plate_diffraction_3D()
305    Segment S31(_v1=P3,_v2=P5,_nnodes=mx3+1);  in sys_plate_diffraction_3D()
306    Segment S32(_v1=P5,_v2=P6,_nnodes=mx2+1);  in sys_plate_diffraction_3D()
307    Segment S33(_v1=P6,_v2=P7,_nnodes=mx1+1);  in sys_plate_diffraction_3D()
308    Segment S34(_v1=P7,_v2=P8,_nnodes=mx2+1);  in sys_plate_diffraction_3D()
309    Segment S35(_v1=P8,_v2=P4,_nnodes=mx3+1);  in sys_plate_diffraction_3D()
357          Geometry G = Segment(_v1=Ps1,_v2=Pi1,_nnodes=my+1)  in sys_plate_diffraction_3D()
358 …     + Segment(_v1=Pi1,_v2=Pi2,_nnodes=mx2+1) + CircArc(_center=Ci1,_v1=Pi2,_v2=Pi3,_nnodes=nai1+1)  in sys_plate_diffraction_3D()
359 …    + Segment(_v1=Pi3,_v2=Pi4,_nnodes=nli1+1) + CircArc(_center=Ci2,_v1=Pi4,_v2=Pi5,_nnodes=nai2+1)  in sys_plate_diffraction_3D()
360 …    + Segment(_v1=Pi5,_v2=Pi6,_nnodes=nli1+1) + CircArc(_center=Ci3,_v1=Pi6,_v2=Pi7,_nnodes=nai1+1)  in sys_plate_diffraction_3D()
361 …                   + Segment(_v1=Pi7,_v2=Pi8,_nnodes=mx2+1) + Segment(_v1=Pi8,_v2=Ps8,_nnodes=my+1)  in sys_plate_diffraction_3D()
362 …     + Segment(_v1=Ps8,_v2=Ps7,_nnodes=mx2+1) + CircArc(_center=Cs3,_v1=Ps7,_v2=Ps6,_nnodes=nas1+1)  in sys_plate_diffraction_3D()
363 …    + Segment(_v1=Ps6,_v2=Ps5,_nnodes=nls1+1) + CircArc(_center=Cs2,_v1=Ps5,_v2=Ps4,_nnodes=nas2+1)  in sys_plate_diffraction_3D()
364 …    + Segment(_v1=Ps4,_v2=Ps3,_nnodes=nls1+1) + CircArc(_center=Cs1,_v1=Ps3,_v2=Ps2,_nnodes=nas1+1)  in sys_plate_diffraction_3D()
365                       + Segment(_v1=Ps2,_v2=Ps1,_nnodes=mx2+1);  in sys_plate_diffraction_3D()
471       Segment Sk(_v1=Point(x),_v2=Point(x+h),_nnodes=my+1,_domain_name="S"+tostring(k+1));  in sys_plate_diffraction_3D()