OBD:OTLF: Difference between revisions

OBD:OTLF (view source)

Revision as of 17:37, 31 May 2020

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 ;Intersected gunk quads
-: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 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 threshold limit used to build the octree seems to be 19 gunk quads per leaf.
 ;Intersected BNVs
-: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]].
+:An octtree 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]].
 ;Position and size
-: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.
+:The position (of leaf's positive corner) is stored as three 9 bit fields. These values are not the x, y and z coordinates themselves but they are indices into a constant table. This constant table has 512 entries starting with -4080.0 and going up to 4096.0 in 16 units increments.
 :The size of leaf is stored in a 5 bit field and it is and index into another constant table. This table has 9 entries starting with 16.0 and going up to 4096.0 (each entry is double the previous one).
 :*Maximum environment size is (8192.0, 8192.0, 8192.0)