OBD:OTLF: Difference between revisions

:An octtree leaf (OTLF) stores its size and position and the gunk quads that intersect it. The first field contains an index/count pair that is used to access the first [[OBD:IDXA|IDXA]] field that is stored in the [[OBD:AKOT|AKOT]] that owns this leaf. This [[OBD:IDXA|IDXA]] contains the gunk quad numbers that intersect the leaf. In theory there can be at most 4096 gunk quads that intersect a leaf but in practice this number is much lower (max is 462). In addition the treshold limit used to build the octree seems to be 19 gunk quads per leaf.

:An octtre leaf can intersect some BNVs (see [[OBD:AKVA|AKVA]]). The last field contains the index and count of this list in the second [[OBD:IDXA|IDXA]] field of [[OBD:AKOT|AKOT]].

:The position (of leaf's positive corner) is stored as three 9 bit fields. These values are not the x, y and z coordinates themselfs but they are indexes into a constant table. This constant table has 512 entries starting with -4080.0 and going up to 4096.0 in 16 units increments.