Octree Search
Octree Search Octree search extends quadtree ideas to three dimensional space. It recursively partitions space into eight octants, enabling efficient spatial queries over 3D points or volumes. It is commonly used in graphics, physics simulation, and spatial indexing. Problem Given a set of 3D points and a query axis aligned bounding box (AABB), find all points inside the box: $$ x_1 \le x \le x_2,\quad y_1 \le y \le y_2,\quad...