In this paper, The quadtree is adopted to divide polygons to realize colorfilling and calculation of polygons are also introduced.
本文采用四叉树分割多边形，用以实现多边形的色彩填充及其相互之间的运算。
2
The kid like colorfilling game. When you see that she fill the trunk in blue, person's face in red, will you stop her and make her change into the normal colors?
孩子喜欢涂色游戏，可你看到她用蓝色涂树干，用红色涂人的脸，你会阻止她，让她换成“正常”的颜色吗？
3
This ensures a uniform color background for each slice where it is filling in the holes from higher layers.