OceanShipping Tally Company

This process is comprised just with comparative calculations which can grea tly exclude the edges that are impossible to be the part of contour.

算法L利用外轮廓线的连通性递归搜索邻接的轮廓边得到若干闭合回路和分离的轮廓边,最终得到外轮廓线,并且自动决定的闭合回路方向和回路之间位置关系决定了回路是否属于外轮廓线;对那些精度不高而可能造成闭合回路搜索失败的三维模型,算法C利用遮挡关系由模型的前向面片对轮廓边进行裁剪得到三维模型的外轮廓线。