AROT (MREA Section)

Left: Recursive subdivision of a cube into octants. Right: The corresponding octree.

Within MREA resources, the AROT section stores an octree which is used to accelerate rendering of areas.

Octrees are a form of BSP tree that subdivide an area across 3-dimensions. They are structured recursively, starting with a root node and traversing their way to individual leaf nodes. A valid octant will split sub-octants across 3-tiers, one for each dimension of euclidean space.

Header

Offset	Size	Data Type	Description	Notes
0x0	4	long	Magic	AROT
0x4	4	long	Version	Always 0x1
0x8	4	long	Mesh-Bitmap Count	Count of mesh-bitmaps
0xC	4	long	Mesh-Bitmap Bit-Count	Count of bits in each mesh-bitmap
0x10	4	long	Node Count	Number of octant nodes
0x14	24	float2x3	AABB	AABB that fully-encloses area and serves as the octree's root-shape