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Follow the gameplay.bin pointers: they address position and direction arrays

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Where the pointers go. Following them shows what gameplay.bin indexes. The leading
table is 39 words, all of which land inside the file, and three clusters
dominate: near 150000, near 800000 and near 1050000.

The region near 797808 is position data -- 31 consecutive plausible floats that
group cleanly into xyz triples:

  246.948 201.015  73.867 |  88.240 186.000 302.598 | 107.712  12.723 183.125
  353.591 126.365  19.962 | 182.068 374.001 122.567 | 116.961 265.001 437.866

and the region near 797456 is direction data -- unit-length vectors:

  0.969 0.945 0.733 | -0.120 0.433 0.250 | -0.866 0.000 0.267

So the file's leading words are a table of pointers into float arrays, not a flat
list of small integers. The earlier reading of it as "u32 pointers holding
nothing" was too quick: it is a pointer table into data that is present.

Volumes remain unlocated. The position arrays are the right shape to bound a
volume and nothing yet shows the volume records themselves.
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ReaperOfVeriod
2026-10-12 03:36:55 +02:00
parent b17ec17127
commit d8b8ccc6d4
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@@ -1663,6 +1663,24 @@ look like.
terminator sits at the same index on both levels. No `gc_formats` module exists terminator sits at the same index on both levels. No `gc_formats` module exists
for this yet; it is characterised, not parsed. for this yet; it is characterised, not parsed.
**Where the pointers go.** Following them shows what `gameplay.bin` indexes. The
leading table is 39 words, all of which land inside the file, and three clusters
dominate: near 150,000, near 800,000 and near 1,050,000.
The region near 797,808 is **position data** -- 31 consecutive plausible floats
that group cleanly into xyz triples:
246.948 201.015 73.867 | 88.240 186.000 302.598 | 107.712 12.723 183.125
353.591 126.365 19.962 | 182.068 374.001 122.567 | 116.961 265.001 437.866
and the region near 797,456 is **direction data** -- unit-length vectors:
0.969 0.945 0.733 | -0.120 0.433 0.250 | -0.866 0.000 0.267
So the file's leading words are a table of pointers into float arrays, not a
flat list of small integers. The earlier reading of it as "u32 pointers holding
nothing" was too quick: it is a pointer table *into data that is present*.
**On volumes.** Nothing resembling volumes was found here. `gameplay.bin` is **On volumes.** Nothing resembling volumes was found here. `gameplay.bin` is
u32 pointers throughout and holds no float data in its first 64 words read as u32 pointers throughout and holds no float data in its first 64 words read as
`f32` (59 of 64 are denormals, i.e. small integers reinterpreted). Volumes remain `f32` (59 of 64 are denormals, i.e. small integers reinterpreted). Volumes remain