The previous commit claimed ~6.2 MB of unidentified data sat between the
collision header and the first moby class, and speculated it might be
moby_anim. That was wrong, and it came from quoting a size before bounding
the thing it measured.
Looking at the bytes rather than only the offsets: the range is dominated by
8-bit indexed texture data. Byte-value concentration distinguishes them
cleanly -- a texture block draws on a small palette, code and collision data
does not. 18 of 21 sampled 4 KB blocks fall under 200 distinct byte values,
against 249 for tfrags and 209 for collision.
The real layout on level 0:
collision 2615232 .. 3518544 (header plus its declared 903,248 payload)
textures 3518848 .. ~8832192
moby 8832192 ..
The texture table's data_offset values stop at 5326208, which is what made
the gap look genuine. Mip chains extend well past the last entry's offset,
so sizing a region from a table of first-level offsets understates the data
it points at.
Three of the 21 blocks are not texture-like, so something is mixed in that
is still unidentified. It is not 6.2 MB of moby_anim.
This is the third number this session that looked load-bearing and turned
out to rest on an unbounded measurement. The pattern is consistent enough
to be worth stating plainly: sizes derived from tables or offsets are not
evidence until the bytes underneath have been looked at.
ReaperOfVeriod
db414b3d5f