d394ba6aed
This branch predates CI on `main`. `cargo fmt --all` only; no behaviour. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
87 lines
3.5 KiB
Rust
87 lines
3.5 KiB
Rust
//! Do `+4` / `+8` = 180 mean MIRROR?
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//!
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//! The disc-wide census shows `+4` and `+8` are dominated by 180 and ±90, while
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//! `+12` (the decoded screen-plane rotation) takes 157 distinct values including
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//! odd ones. That shape says flips rather than free rotation.
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//!
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//! Structural test, no renderer involved: if 180 means "mirror", then the same
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//! sprite should appear both with the field 0 and with it 180 **within one
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//! build** -- a mirrored pair. Free-rotation semantics predicts no such pairing.
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//!
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//! CONTROL: the same search run on `+12`, which is decoded as a real rotation
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//! and should NOT show a 0/180 pairing pattern of the same strength.
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use std::collections::{BTreeMap, BTreeSet};
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use sylpheed_formats::{pak, ui_layout};
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fn main() {
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let dir = std::env::args().nth(1).expect("<disc>/dat");
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let mut paks: Vec<_> = std::fs::read_dir(&dir)
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.expect("dir")
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.filter_map(|e| e.ok().map(|e| e.path()))
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.filter(|p| p.extension().map(|x| x == "pak").unwrap_or(false))
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.collect();
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paks.sort();
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// field -> (pak, entry, sprite) -> set of values seen
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let mut seen: [BTreeMap<(String, usize, String), BTreeSet<i32>>; 3] =
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[BTreeMap::new(), BTreeMap::new(), BTreeMap::new()];
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for p in &paks {
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let Ok(ar) = pak::PakArchive::open(p) else {
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continue;
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};
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let pn = p.file_name().unwrap().to_string_lossy().to_string();
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for (i, e) in ar.entries().to_vec().iter().enumerate() {
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let Ok(bytes) = ar.read(e) else { continue };
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let Some(b) = ui_layout::parse_build(&bytes) else {
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continue;
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};
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let mut groups: Vec<(String, Vec<ui_layout::Keyframe>)> = b
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.elements
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.iter()
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.map(|el| (el.name.clone(), el.keyframes.clone()))
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.collect();
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for el in &b.elements {
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if let Some(&(off, size)) = b.records.get(&el.name) {
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if let Some(lb) = ui_layout::parse_build(&bytes[off..off + size]) {
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for le in &lb.elements {
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groups.push((le.name.clone(), le.keyframes.clone()));
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}
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}
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}
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}
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for (nm, ks) in groups {
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for k in &ks {
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let key = (pn.clone(), i, nm.clone());
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seen[0].entry(key.clone()).or_default().insert(k.unknown_4);
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seen[1].entry(key.clone()).or_default().insert(k.unknown_8);
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seen[2].entry(key).or_default().insert(k.rotation_deg);
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}
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}
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}
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}
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for (idx, label) in [(0, "+4"), (1, "+8"), (2, "+12 (rotation, CONTROL)")] {
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let m = &seen[idx];
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let mut pair_0_180 = 0usize; // a sprite seen at BOTH 0 and 180 in one build
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let mut only_180 = 0usize;
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let mut multi = 0usize; // more than two distinct values
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for v in m.values() {
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if v.len() > 2 {
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multi += 1;
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}
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let has0 = v.contains(&0);
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let has180 = v.contains(&180) || v.contains(&-180);
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if has0 && has180 {
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pair_0_180 += 1;
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} else if has180 && !has0 {
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only_180 += 1;
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}
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}
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println!("{label}: {} sprite-instances", m.len());
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println!(" both 0 and ±180 in one build : {pair_0_180}");
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println!(" ±180 without any 0 : {only_180}");
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println!(" more than 2 distinct values : {multi}");
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}
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}
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