Claude (auto-RE)
621b9dd6e9
Each UI sprite <name>.t32 ships with a <name>.rat companion, and that companion is the layout record: big-endian u32, a 1280x720 design space at 0x18, and a placement block of scaleX/scaleY/tint/X/Y. Animated elements repeat the block with a trailing time field (keyframes); an 'opt ' tag carries a length-prefixed link to the focused-state record. Verified in that order, records first: across the four pause buttons exactly one field varies, stepping 268/338/408/478 at a constant 70px pitch with X fixed at 226; the three items visible in a screenshot of the running game measure 346.0/415.5/485.5, mapping onto those numbers under one constant offset to within 0.5px. The tutorial build's records are outright framebuffer coordinates, and compositing its sprites there reproduces the screenshot pixel-accurately. Also records two mistakes the A/B caught, since a static-only reading would have shipped both: texture width does not identify a language (Japanese fits English widths), and the in-mission and tutorial pause menus are separate sprite sets rather than one set re-packed into slots. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
3.3 KiB
3.3 KiB
RE knowledge index
Confidence: ✅ CONFIRMED · 🟡 PROBABLE · ❔ HYPOTHESIS. See README.
Formats we've already reversed are, for now, documented by their parser + disc round-trip
tests (the executable spec) rather than a prose file — the "Spec" column points there.
Promote to a prose structures/…md file when a format needs behavioural notes beyond layout.
Data structures / formats
| Format | Conf. | Spec (parser + tests) | Notes |
|---|---|---|---|
IPFB .pak archive |
✅ | sylpheed-formats/src/pak.rs + tests/pak_idxd_disc.rs |
header + 12-byte TOC, Z1/zlib payloads |
| name-hash (TOC keys) | ✅ | sylpheed-formats/src/hash.rs |
Barrett-reduction hash; recovers original paths |
| IDXD object/table | ✅ | sylpheed-formats/src/idxd.rs |
self-describing; ship/weapon stats verified vs known values |
| XPR2 texture + cubemap | 🟡 | sylpheed-formats/src/texture.rs |
de-tile + A8R8G8B8; colours unverified (dynamic item) |
| T8aD 2D texture | 🟡 | sylpheed-formats/src/t8ad.rs |
~85% decode; colours ✅ CONFIRMED (k8888); ~15% variants deferred |
| RATC bundle | 🟡 | sylpheed-formats/src/ratc.rs |
child listing confirmed; one level deep |
| LSTA sprite list | 🟡 | sylpheed-formats/src/lsta.rs |
inline T8aD frames |
| IXUD subtitle | 🟡 | sylpheed-formats/src/ixud.rs |
timed cues; movie↔track link unknown (dynamic item) |
| Fonts (ttf/otf/ttc) | ✅ | sylpheed-formats/src/font.rs |
standard OpenType, parsed via ttf-parser |
| XBG7 mesh | 🟡/❔ | sylpheed-formats/src/mesh.rs + tests/mesh_disc.rs (xbg7) |
weapons/props: declaration-driven variable stride (36 models), GPU-confirmed. Stage containers: 5662 sub-models across 22 stages via content-anchored grouped pools (stage_models). Quantized hero bodies (DeltaSaber f004) still declined |
| Capital-ship part placement | 🟡 | sylpheed-formats/src/ship.rs (static) + runtime capture |
hull placement static-exact; external parts approximate statically. Runtime capture (Canary F10 → VS-constant WorldView) gives ground truth — validated on e106 destroyer; not yet baked into the viewer |
| Weapon fields defaulted on disc | ✅/🟡 | runtime DATA SHEET | The Arsenal Gallery-Mode panel reads the live record: Ammo Capacity = LoadingCount ✅, Max. Lock Ons = TriggerShotCount ✅. Recovers TriggerShotCount for wep_05/wep_60 (both 4); brackets defaulted Power/MaximumRange via the letter classes. 9 of ~61 weapons reachable at 5 % save progress |
UI screen layout (.rat) |
✅/🟡 | ui-rat-layout | One pak per UI screen; each RATC = one (context × language) build; every <name>.t32 sprite has a <name>.rat layout record (BE u32; 1280×720 design space; scale/tint/X/Y, keyframes for animated elements, opt link to the focused state). The tutorial PAUSE menu rebuilds pixel-accurately from the disc. loop1.rat (screen-level draw order) not yet decoded |
Functions / code paths
None documented yet — populated during the dynamic-RE phase.
| Function | Conf. | Reimpl. | Summary |
|---|---|---|---|
| — | — | — | — |