However, if you were viewing the actual surface instead of a texture mapped polygon, you would see point B.
但是，当你看着一个实际表面而不是带材质贴图的多边形的时候，你将会看到的是点b。
When a texture map representing an uneven surface is applied to a flat polygon, the surface appears to get flattened.
当使用材质贴图在光滑的多边形上表现一个粗糙的表面时，那个表面看起来像是平坦的。
The input lines of dots and the surface, and calculate the composition of the convex polygon centroid, area, and whether the specified line cross, etc.
说明：根据输入点组成线和面，并计算组成的凸多边形的质心、面积、是否和指定线交叉等。
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