In this paper, The quadtree is adopted to divide polygons to realize color filling 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。

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Then I will divide it along and I will drag down the centre polygons for our bottom part like on the image.

然后，我将它分为沿，我将拖累我们的底部在图像上像中心多边形。

youdao

Then I will divide it along and I will drag down the centre polygons for our bottom part like on the image.

然后，我将它分为沿，我将拖累我们的底部在图像上像中心多边形。

youdao