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用整数计算边界判断有问题 #10

@zengdelang

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@zengdelang

v2-64b3beb902ed391a90d3f3415f9fe330_xld
考虑这个三角形,左下角是 (0, 0), 右下角 (3.0) 上边 (1.5, 5),从浮点数边来看,上边的点是包括的,中心被覆盖
如果舍入到整数坐标,那三个点的坐标(0, 0) (3.0) (2, 5) 显然这个时候像素(1,5)不在三角形内了

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