3fc077cbc1
* feat(core): carry chord harmony fn + template voicing on the wire (§6.3.1, §6.6)
Add two OPTIONAL per-chord harmony annotations (feedpak 1.7.0), mirroring the
teaching-marks (fg/ch/sd) wire work:
- Chord.fn (instance): {rn, q, deg} harmonic-function object, key-dependent.
Validated by _validate_fn on BOTH decode and emit so a partial / out-of-range
fn (which would fail the schema's required-keys rule) never rides the wire.
Default-omitted, mirroring bend bnv.
- ChordTemplate.voicing (template): key-independent voicing-type string
("open", "triad", "shell", "drop2", "barre", ...). Emitted only when
non-empty; non-string wire values fall back to "".
Display/teaching only — never fed to a grader (honesty rule). fn auto-derivation
is DEFERRED (carry-only): a complete rn/q needs chord-quality analysis, and a
deg-only fn would be schema-invalid, so server.py carries author-provided fn
unchanged. GP import unchanged (no reliable per-chord function/voicing).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
* feat(highway): render chord harmony fn.rn + voicing on 2D + 3D (§6.3.1, §6.6)
Draw the chord's harmonic-function Roman numeral (instance fn.rn) and its
template voicing string, stacked above the chord name on both highways. A shared
pure helper chordHarmonyLabels(fn, voicing) formats the two labels (empty when
absent/malformed) and is node-tested against both files.
Both labels are gated behind the EXISTING teaching-marks opt-in
(_showTeachingMarks / teachingMarksVisible bundle flag) — they're chord-level
teaching overlays, same class as sd/ch, so they stay off the default highway.
2D guards the empty-note-chord case; 3D reuses the gold chord-label sprite style.
Render only — no scoring / NoteVerifier path is touched (honesty rule).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
3D Highway
A 3D note highway visualization for Slopsmith — an alternative to the default 2D highway, with a sense of depth and perspective inspired by stage views in modern rhythm games.
What you get
- A camera-perspective highway with notes flying down toward a virtual fretboard at the bottom of the screen
- Glowing strings that pulse and brighten on each hit
- Note Detection feedback, including hit/miss outlines and diagnostic early/late/sharp/flat labels when the note detection plugin emits enriched judgments
- Chord frame-boxes, named-chord labels, and a chord diagram overlay (configurable corner position) so you can read shapes at a glance
- Two complementary barre indicators fire together when a barre chord shape is detected (2+ consecutive strings fretted at the lowest fret, e.g. F
[1,1,2,3,3,1], or an outer-edge full-span barre with every intermediate string fretted, e.g. B majorx24442): a translucent vertical line across the strings on the 3D highway, and a straight bracket drawn inside the first fret space of the chord diagram overlay - A heat-colored fret number row that lights up around your active playing region
- Selectable color palettes for the strings — pick the look you want
- Audio-reactive ambient background animations (particles, silhouettes, stage lights, geometric — pick one or turn it off)
- Lyrics overlay synced to the song
- Works as the main player view or per-panel inside the splitscreen plugin
Install
3D Highway ships bundled with Slopsmith — no separate installation needed. Pick 3D Highway from the visualization picker in the player.
Note: The bundled version is preferred over any user-installed copy with the same plugin ID. If you have an old
slopsmith-plugin-3dhighwayclone on disk (from before 3D Highway was promoted to core), it will be ignored at startup — a warning in the server log names the path of the discarded copy. You can safely delete the stale clone.Fallback: In the unlikely event that the bundled copy fails to load its routes (e.g., a broken bundled release), Slopsmith will automatically fall back to your user-installed copy and show a yellow "Fallback" badge in the Settings panel. Check the server startup log for the root cause in that case.
Settings
Most of the visual controls (background style, intensity, audio reactivity, color palette) live on Slopsmith's Settings screen under the 3D Highway section.
Contributing / development
For maintainers and AI assistants working on the codebase, see CLAUDE.md — it's a navigation guide that maps every visual element to where it lives in screen.js, plus the gotchas worth knowing before tweaking.
Perf bench (?h3dbench=1)
Append ?h3dbench=1 to the player URL to enable opt-in console.log reporting of update() self-time, broken into six segments — frame (everything between pbBeg(0) at the top of update() and pbEnd(0) at the bottom; excludes the trailing pbReportTick() logging that fires after pbEnd(0)), state (per-frame state-derivation loop), next (next-note-by-string lookahead), mat (per-string material writes), noteDraw (single-note draw loop), chordDraw (chord draw loop). Reported every 5 seconds with p50 / p95 / max per segment and frame count, so before/after numbers on a target chart are reproducible (slopsmith#226). Off-by-default; the bench helpers (pbBeg / pbEnd / pbReportTick) are bound to a shared empty-function literal when the renderer instance is created (each createHighway() panel re-checks the flag), so the hot-path call sites are no-ops with negligible overhead (typically JIT-inlined).