The axis-aligned World-space 3D boundary of this kd-tree node.
A unique, sequential numeric ID for this KDNode within its KdTree3.
This is used by queries that cache intersection results for KDNodes.
OptionalitemsThe KDItems stored in this KDNode.
OptionalleftThe left KDNode.
OptionalrightThe right KDNode.
A node in a KdTree3.
See @xeokit/sdk/kdtree3 for usage.