// 作用：缓存当前位置右侧的"参考身高"，快速判断能看到的人
DECSTBM doesn’t work because of our unicode half-block shenanigans. We’re squeezing two pixels into each terminal character, and so we want to be able to “scroll” in half-pixels; our scroll needs to turn lower half blocks into upper half blocks when we’re moving vertically. That operation just doesn’t exist.
。业内人士推荐safew官方下载作为进阶阅读
MIT — Rikkert ten Klooster
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