ocr: Lead edge polygon M, x=18 Lead edge polygon N, X-50 Lead edge polygon M, X=100 ACtVO polygons Est Currentedge, since it's a eading edge, sort polygon M into the. acuve polygonlist. Head of APL Polygon M zatx=18is50 Polygon. J zat. X=18 is 100 Polygon Mhasa nearer. Z atx-18than anypolygon: in thex APL, 80 putp polygon Me at thelop: ofthe APLIE itis the nearest surtaco at this pbel,hence visible. Emit as span.for polygon J, etaring at the X Polygon K whereJbecame' visible andending al zatx X=18is 125 18 X=18 is tho start coordinate vor the spanthatwil be ermittedfor-polygon Mwhen itends on-this ...
