The spatial view (the grid of rectangles) and the tree view (the hierarchy of nodes) represent the same structure. Searching for a point means walking down the tree: at each node, you check which of the four children contains your target coordinate and recurse into that child. You never visit the other three.
pixels create newbox --from mybox
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14:45, 27 февраля 2026Бывший СССР。关于这个话题，WPS官方版本下载提供了深入分析
const posToTime = new Map(); // 位置 → 到达终点的时间（避免重复计算）