const str = _call.call(_toString, original);
文 | 锌刻度，作者 | 李觐麟，编辑 | 黎文婕
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The barycentric coordinates of are derived from the areas of sub-triangles .
On top of that, we can get two full pixels of color using foreground and background colors. If we render an upper block with a foreground color of cyan and a background color of red, we get a cyan pixel sitting on top of a red pixel!
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