The algorithm proposed by us for polygonal chains intersection based on the sweep line algorithm is extended, and it is used to detect and delete global self-intersections in the rough offset curve.
拓展了我们已有的平面上单调链求交的扫描线算法，将其应用到初步等距线中的全局自交点和全局无效环的确定上。
His face was a mask of woeful bone, but his eyes twinkled like the eyes of old giggling sages of China, over that little goatee, to offset the rough look of his handsome face.
他脸相是掩饰骨子里悲哀的面具，但他的眼睛发亮，看似是个咯咯发笑的中国哲人的眼睛，横跨在那山羊胡子上用以抵消他英俊面容的粗野神态。
E-ink image and substrate is matched with a wall of blood, such as traditional offset press, can be produced from rough to the dusking to the effect of high-brightness.
电子墨图像与承印物的光滑度相匹配，如传统胶印机一样，能产生从粗糙到阴暗到高亮度的效果。
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