The Polygon Area Fill is one of the import operators of the Computer Graphics and Image.
多边形域填充是图形图像处理中最基本的操作之一。
In the process of reserve calculation using volumetric method, to confirm oil-bearing area is in fact to calculate polygon area.
在用容积法计算地质储量的过程中，含油面积的确定实际上是计算多边形的面积。
At the same time the author points out that the polygon vertexes can be sorted clockwise or anticlockwise by judging the sign of the vector polygon area.
同时指出可以通过判断矢量多边形面积的正负值将多边形的顶点按照顺时针或逆时针方向排序。
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