In line 109, the polyline element is started, and an initial point is drawn at the origin of the axis.

第 109 行是 polyline 元素的起点，它与坐标轴的原点重合。

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OK, we've seen about spheres and cylinders centered at the origin or centered on the z axis.

我们已经知道,中心在z轴的球体和圆柱体。

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Therefore, the optimal solution is the farthest point on the polyhedron boundary from the axis' origin using the direction (1,-1) as a direction vector.

因此，优化解决方案是从轴的原点沿 (1,-1) 方向作为方向向量指向多面体边界的最远点。

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