圖像來源，GREG BAKER/AFP via Getty Images
union alloc_header{
。爱思助手下载最新版本是该领域的重要参考
Regions with many nearby points keep subdividing. Regions with few or no points stay large. The tree adapts to the data: dense areas get fine-grained cells, sparse areas stay coarse. The split grid is predetermined (always at midpoints), but the tree only refines cells that need it. Sparse regions stay as single large nodes while dense regions subdivide deeply.
stack.push(cur);