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## The Existing Problem and Solution for Arithmetic of Scan-Line Filling

CHEN Xi-yao1,CHEN Wei1,TONG Li-fang2 (1.Informatization Teaching Centre,Northeast Dianli University,Jilin City 132012;2.Engineering Training Centre,Northeast Dianli University,Jilin City,132012)
There is a obvious defect in scan-line filling arithmetic.This method can not be used for the polygons which have one or more CQX vertices.A solution for this question is finding out the CQX vertices and deleting their edges in the Active Edge List(AEL).The improvement of scan-line method will make it passable that all kinds of polygons can be filled correctly by this algorithm.
【CateGory Index】： TP391.4
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