ReaperOfVeriod
1e90c7de6d
Starting from the phase's stated exit criteria rather than the checklist, because
"complete" should mean the gate, not the feeling of the list.
THE GATE IS MET. Both halves, checked by inspection:
* Golden tests. Every module in gc-formats/src is referenced by a test or another
module's test path; none is unreferenced. gc-extract/tests/disc.rs carries 50
real-disc tests, and overlay_reloc's mask test resolves a level-01 function on
all 26 other overlays.
* Counts are failures, not warnings. No parser writes warning-style output
outside #[cfg(test)] -- the only eprintln! calls in gc-formats are inside test
modules. Count and length problems surface as typed errors: 42 uses of
ErrorKind::Invalid / InvalidLength, including global_wad's "pair table is not a
whole number of entries", which is precisely a header count disagreeing with
the data.
THE GOAL IS NOT MET, and saying otherwise would be the thing AGENTS.md forbids.
The goal reads "every asset type parses into plain Rust values". Four do not:
collision cells, volumes, moby_anim and the tfrag morph are located or framed but
have no decoded fields. The gate was written to be checkable and it does not test
for that, which is a gap in the gate rather than a reason to declare victory.
So the remaining gap in the phase's own discipline is that the four blocked items
did not say what would unblock them, which AGENTS.md requires and which none of
them did. Closed now, each with the specific unblock condition:
collision cells the game addresses its assert string by something other than a
$gp-relative load -- a %hi/%lo split that does not straddle
zero, a pointer table, or another section. A plain $gp search
returns zero and always will.
volumes ground truth: a count of level 0's trigger volumes from a map,
to match against the 144-byte table's population. No class name
containing "volume" exists on the disc, so the dispatch route is
closed.
moby_anim needs moby class records decoded past the header -- a
dependency, not a measurement.
tfrag morph needs a frame captured at a KNOWN camera distance, so the
expected blend is computable. Requires driving the running game,
not analysing a static savestate.
None of these is an approximation, and none is marked done.
258 tests, 50 in the disc suite, clippy clean on my own code.
Going Commando
A native PC reimplementation of Ratchet & Clank: Going Commando (PlayStation 2, 2003), written in Rust.
The game is reimplemented, not emulated. There is no MIPS interpreter here and no CPU emulator: the systems are ported to Rust so they run as ordinary native code.
Status: initial scaffold. The disc is identified and verified, the
workspace builds, and nothing else is implemented yet. See
docs/roadmap.md for where things stand and what comes next.
The target
| Game | Ratchet & Clank: Going Commando |
| Platform | PlayStation 2 |
| Disc | SCUS_972.68 v1.01, USA Black Label |
| Video | NTSC, 60 Hz |
| Boot ELF SHA-1 | bacda860cbd6723142e86db56f197e47e728970f |
Verified against a real disc — see docs/disc-identification.md.
This is the build the reference projects pin; Greatest Hits v2.00 is a
different binary and is not the target.
No game content
This repository contains no game assets, no disc images, no BIOS dumps and no proprietary toolchains. You supply your own legally obtained copy of the disc as an input, the way the upstream reference projects do.
A pre-commit hook enforces this, blocking disc images, asset directories, container signatures and files over 50 MiB. If you clone elsewhere, enable it:
git config core.hooksPath .githooks
Layout
crates/
gc-formats/ asset format parsers (pure, no I/O beyond the caller's buffer)
gc-extract/ disc pipeline: identify, unpack, verify
gc-game/ game logic: hero, weapons, moby classes, progression, saves
gc-video/ IPU / MPEG-2 decode
gc-engine/ Bevy app: Graphics Synthesizer, VU0/VU1, renderer, frame loop
docs/
disc-identification.md which disc we build against, verified
roadmap.md phases, gates, current status
plan/ one file per subsystem, written as work proceeds
formats/ format specs, written as formats are reversed
tools/
identify-disc.py identify any Going Commando disc image
vendor/
rerac/ pinned upstream reference checkout (not tracked)
Building
Requires a Rust toolchain via rustup.
cargo check --workspace
cargo test --workspace
The host audio backend is disabled in Cargo.toml (see the comment there) so
that the workspace builds without system ALSA development headers. Audio decode
is the last phase of the port and lives in gc-video; re-enable it and install
alsa-lib-devel when that work starts.
Identifying a disc
python3 tools/identify-disc.py <your-disc.iso>
Reports the serial, version and video mode from SYSTEM.CNF, hashes the boot
executable, and warns when the disc is not the supported build. Reads only a
few megabytes, so it is near-instant.
How it will be verified
Visual and behavioural comparison against PCSX2, replaying recorded input and
comparing frames, level by level. The PS2 float model is reproduced rather than
approximated — see AGENTS.md.
PCSX2 is installed and working on this machine; the comparison loop that reads
the game's own memory over its debug protocol is up, and level 0's and level
1's tfrag lighting are verified byte-exact against it. See
docs/plan/pcsx2-verification.md for the
setup and how to run it.
Credits and licensing
This project learns from and is built on the work of others. Licences are
recorded in PROVENANCE.md and notices must travel with any
code derived from them.
- ReRAC — a native Rust/Bevy port of Ratchet & Clank (2002), the first game. ISC. The architecture this project follows.
- OpenRAC / rac2-gc-decomp — matching decompilation research for this game. MIT. Source of verified struct layouts and engine documentation.
- Wrench — community documentation of Insomniac's container formats. GPL, used as a specification reference only; no code is copied.
Ratchet & Clank is a trademark of Sony Interactive Entertainment. This is an unofficial fan project, not affiliated with or endorsed by Sony Interactive Entertainment or Insomniac Games.