Range measured: all 27 levels, each sky region from the core index's sky offset
to the next region.
Method: read the 32-bit offset table at +0x20, bounded by staying inside the
region, and parse each sub-object it names.
Result: 149 sub-objects across 27 levels. Each opens with a count, then a
bounding sphere of four floats at +0x10, then a texture offset at +0x20 and
dimensions at +0x24/+0x26:
+000: 26 00 00 00 | 00 00 00 00 00 00 00 00 00 00 00 00
+010: e0 8d b2 c1 | 9f d6 f6 3d | ef fc fb be | 1c 61 4e 41
+020: 90 99 05 00 | 1d 00 | 1d 00 | 00 00 e8 00 ...
Count 1 to 38, width 3 to 81, radius 1.95 to 14.56, and the radius is positive
on 149 of 149 -- the same sphere shape and the same reasoning as the shrub class
header's.
Correction to an earlier claim: the word at +0x0c is not the sub-object count. It
reads 5 on level 0 where the table holds 6 entries, 3 on level 1 against 4, 7 on
level 3 against 8, and 196617 on level 2 against 4. Across the disc
offsets.len() == count+1 holds on 10 of 27 levels.
The field is reported as SkyHeader::field_0c and nothing depends on it; the
offset table enumerates the sub-objects and is self-limiting. That earlier claim
came from level 0 alone, where 5 against 6 looked like a consistent off-by-one.
It is not an off-by-one -- it is a field that happens to be small on most levels
and is not a count at all.
gc_formats::sky parses the header and the sub-objects. The gated test asserts the
sphere is finite, the radius positive where positive at all, the dimensions
non-zero, and the sub-object list non-empty on every level.
ReaperOfVeriod
681e7e62ef