feat(windsteer): polar and VMC overlay from the active polar - #641
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughWindsteer gains an optional polar and VMC overlay. A new service loads the active polar and performance factor, and polar utilities calculate the curves and dot. Configuration, SVG rendering, tests, help text, and the performance harness support the overlay. ChangesWindsteer polar and VMC overlay
Estimated code review effort: 4 (Complex) | ~60 minutes Sequence Diagram(s)sequenceDiagram
participant WidgetWindComponent
participant ActivePolarService
participant DataService
participant SignalKAPI
participant SvgWindsteerComponent
WidgetWindComponent->>ActivePolarService: Start when overlay is enabled
ActivePolarService->>DataService: Subscribe to active-polar and performance-factor paths
ActivePolarService->>SignalKAPI: Read v1 active-polar value when path is unset
ActivePolarService->>SignalKAPI: Fetch selected polar table from v2 Resources API
ActivePolarService->>WidgetWindComponent: Expose polar status and data
WidgetWindComponent->>SvgWindsteerComponent: Pass mode, curves, rotation, and dot radius
Merge Risk: ⚪ Minimal · up to This change adds an optional, off-by-default polar and VMC overlay to Wind Steer. The options dialog's missing-input hint now checks the same data sources the widget reads, so it correctly explains why the overlay is hidden. The remaining known limitations are small: hint wording when a data timeout is enabled, and a few seconds of cached data after re-enabling the overlay. The change looks ready to merge. 🚥 Pre-merge checks | ✅ 1 | ❌ 3❌ Failed checks (3 warnings)
✅ Passed checks (1 passed)
Full details: Linked Issues checkExplanation The implementation covers the main Resolution Remove Full details: Docstring CoverageExplanation Docstring coverage is 35.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 80 functions across 21 files. (4 skipped: 4 unsupported.)
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Inline comments:
In
`@src/app/widget-config/root-modal-widget-config/root-modal-widget-config.component.ts`:
- Around line 157-161: Update the polar overlay subscriptions in the
initialization flow around POLAR_OVERLAY_PATH_KEYS to resolve each slot’s source
like effectivePathCfg: use the source from the slot named by sourceFromPath when
present, otherwise the slot’s own source, and fall back to 'default' when blank.
Pass that resolved source to acquirePath so the missing-input hint observes the
same stream as the widget.
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package-lock.jsonis excluded by!**/package-lock.json,!package-lock.jsonsrc/app/widgets/svg-windsteer/svg-windsteer.component.svgis excluded by!**/*.svgsrc/assets/skip-dashboard-schema.jsonis excluded by!src/assets/skip-dashboard-schema.json
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THIRD-PARTY-NOTICES.mdpackage.jsonperf-harness/README.mdperf-harness/lib/server.mjsperf-harness/lib/skip-config.mjsperf-harness/run.mjsperf-harness/scenarios.mjsperf-harness/shot-windsteer.mjssrc/app/core/components/widget-config-panel/widget-config-panel.component.spec.tssrc/app/core/directives/widget-streams.directive.spec.tssrc/app/core/directives/widget-streams.directive.tssrc/app/core/interfaces/widgets-interface.tssrc/app/core/services/active-polar.service.spec.tssrc/app/core/services/active-polar.service.tssrc/app/core/utils/polar-engine.hurma-polar.fixture.jsonsrc/app/core/utils/polar-engine.util.spec.tssrc/app/core/utils/polar-engine.util.tssrc/app/core/utils/polar-overlay.util.spec.tssrc/app/core/utils/polar-overlay.util.tssrc/app/widget-config/root-modal-widget-config/root-modal-widget-config.component.htmlsrc/app/widget-config/root-modal-widget-config/root-modal-widget-config.component.scsssrc/app/widget-config/root-modal-widget-config/root-modal-widget-config.component.spec.tssrc/app/widget-config/root-modal-widget-config/root-modal-widget-config.component.tssrc/app/widgets/svg-windsteer/svg-windsteer.component.scsssrc/app/widgets/svg-windsteer/svg-windsteer.component.spec.tssrc/app/widgets/svg-windsteer/svg-windsteer.component.tssrc/app/widgets/widget-windsteer/widget-windsteer.component.htmlsrc/app/widgets/widget-windsteer/widget-windsteer.component.spec.tssrc/app/widgets/widget-windsteer/widget-windsteer.component.tssrc/assets/help-docs/dashboards.md
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The TypeScript polar engine ports polar-math 1.1.1; its parity spec loads the library as the reference implementation. Pinned exactly so a version change is a deliberate re-run of the parity specs. devDependency only: polar-format compiles an ajv schema at module load, which must not reach the app bundle. The lockfile's root version also resyncs to package.json (1.5.0). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Code review (persona review, head
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| # | File | Issue | Reviewers | Confidence | Route |
|---|---|---|---|---|---|
| 1 | widget-streams.directive.ts:37 |
sourceFromPath copies the donor slot's source even when the donor reads another path. With the Ground TWA path and a pinned source that sends only angleTrueGround, the hidden water-TWA slot subscribes to angleTrueWater from that source, so the overlay never shows. The dialog then says the server "has not sent" a path that another source does send. Fix: inherit only when both slots read the same path. |
correctness, api-contract, testing, adversarial | 0.75 | gated_auto |
| 2 | active-polar.service.ts:219 |
The table GET has no timeout. A request that never answers leaves the status at loading for the app's lifetime: no hint, and no retry, because the retries act only on fetch-failed. Fix: add timeout(<named constant>) like the history and storage clients, so a timeout maps to fetch-failed. |
reliability | 0.80 | gated_auto |
P3 – Low
| # | File | Issue | Reviewers | Confidence | Route |
|---|---|---|---|---|---|
| 3 | active-polar.service.ts:181 |
The one-shot REST read of activePolar is never retried after an error other than 404. On a server with no polar provider the status then stays loading for good, and the dialog shows no reason. |
reliability, correctness, adversarial, testing | 0.80 | gated_auto |
| 4 | active-polar.service.ts:150 |
After invalid-table, nothing loads the table again. Opening the dialog retries only fetch-failed, so a table fixed in place keeps reporting invalid until the page reloads. |
reliability | 0.62 | gated_auto |
| 5 | root-modal-widget-config.component.ts:165 |
The missing-input hint counts only non-null replays. DataService resets a timed-out path to {value: null}, so an input that was received and went stale can be reported as never sent. The spec fakes staleness differently. |
testing, correctness | 0.70 | gated_auto |
| 6 | widget-windsteer.component.ts:646 |
Turning the overlay back on replays DataService's cached value, however old, and marks the inputs fresh, which contradicts the comment above it. The spec uses a streams mock, so it misses this. |
adversarial | 0.65 | gated_auto |
| 7 | active-polar.service.ts:30 |
An href the Polar Performance plugin accepts (an id with ., or a /signalk/v2/api prefix) is reported to the user as "no active polar". It needs a message of its own, and possibly a wider id pattern. |
adversarial | 0.60 | gated_auto |
| 8 | widget-streams.directive.ts:36 |
effectivePathConfig sits between widgetPathSignature and its JSDoc, which leaves widgetPathSignature undocumented. |
maintainability, api-contract, project-standards | 0.95 | safe_auto |
| 9 | svg-windsteer.component.spec.ts:701 |
The destroy test passes without the fix it guards: with polarOverlay() removed from the cancel list, it still passes (mutation run). Clear the spy before destroy(). |
testing | 0.95 | safe_auto |
| 10 | widget-windsteer.component.spec.ts:652 |
No widget test uses a performance factor other than 1, so a dropped argument at component.ts:352 or :358 would go unnoticed. |
testing | 0.85 | safe_auto |
| 11 | svg-windsteer.component.spec.ts:651 |
No test asserts that the VMC lobe path is closed (Z). |
testing | 0.80 | safe_auto |
| 12 | svg-windsteer.component.ts:11 |
POLAR_OVERLAY_DIAL_RADIUS = 350 duplicates the class field RADIUS = 350. |
maintainability | 0.80 | safe_auto |
| 13 | CLAUDE.md:49 |
Says "7-scenario suite"; windsteer-vmc makes 8. |
project-standards | 0.80 | safe_auto |
| 14 | widget-streams.directive.ts:161 |
The private effectivePathCfg only passes through to effectivePathConfig. |
maintainability | 0.72 | safe_auto |
| 15 | commits | 9054a47c has a 51-character subject; 38077d7e fix(polar) revises a service that 26168fcc added on this branch and belongs folded into it. |
project-standards | 0.80 | safe_auto (history rewrite) |
| 16 | widget-windsteer.component.ts:790 |
normalizeRadians duplicates normalizeHeading in polar-overlay.util.ts. |
maintainability | 0.66 | safe_auto |
| 17 | polar-engine.util.ts:84 |
The port keeps the extrapolate: false path and fine-grained state labels, which no production caller reads. Keep them for oracle parity, but say so in the header. |
maintainability | 0.62 | safe_auto (doc) |
| 18 | widget-windsteer.component.ts:635 |
The overlay slot names are listed three ways (observe, unobserve, freshness reset). | maintainability | 0.60 | safe_auto |
Pre-existing
| # | File | Issue | Action |
|---|---|---|---|
| 19 | widget-windsteer.component.ts:258 |
A history-style comment ("Removed local registeredPaths guard…"). | fix-here (the PR edits the lines around it) |
Coverage
- Residual risks:
- An oversized table from a writer to the Resources API can throw inside the load handler (a
Math.maxspread limit) and leave the status atloading. A try/catch that maps the throw toinvalid-tablecovers it. - A performance factor published as a percentage (95) clamps every radius to the dial edge.
- The VMC lobe can swing during a tack, because heading and TWA are sampled separately.
- Each Freeboard tile is a separate app instance with its own fetch.
- An oversized table from a writer to the Resources API can throw inside the load handler (a
- Testing gaps beyond the findings: TWS and STW dedup; a session change while a fetch is pending; the dialog hint after an in-dialog change of the TWA source.
Verdict: ready with fixes. Findings 8–19 are mechanical and are being applied now. Findings 1–7 change behavior and are listed for the maintainer's approval; 1 and 2 are the ones that matter in normal use.
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Port of polar-math 1.1.1 (table preparation with the zero-speed row, derived beat and run targets, pinch-zone and run-side extensions, speedAt, rangeAt) plus a peak speed across all TWS columns, and polar-format 1.0.0's unit canonicalization. A typed guard replaces the ajv schema: it checks only the fields the engine reads and ignores unknown extra fields, so the Resources API response (name, boatType, source, notes) passes and no runtime code generation ships. The spec checks parity against polar-math within 1e-9 over a TWS/TWA/factor grid for the test-server table and synthetic edge tables, and conversion parity against polar-format. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The polar engine is a TypeScript port of the Apache-2.0 packages polar-math and polar-format. Apache-2.0 section 4(a) requires the license text to accompany the derived work, and minification strips the source header from the build, so the npm package now ships a notice file with the attribution and the license text. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Root service that follows polars.activePolar and polars.performanceFactor once a consumer starts it, fetches the table from the v2 Resources API with HttpClient, and exposes the prepared Polar, its peak speed, the performance factor and a status with a fixed user-facing message. A server with no polar provider never sends polars.activePolar, so on start the service also reads the path over v1 REST: a 404 before any delta means no active polar, a found value is handled like the delta, and a delta that arrives first wins. A REST read that fails otherwise is repeated on a server reconnect, a session change or refreshIfFailed() until an answer or a delta settles the path. Only an href of the form /resources/polars/<id> with a restricted id charset is fetched (single dots allowed, never ".."), and the URL is built from the v2 API base, never by resolving the href. Every request times out after 30 s. A failed fetch retries on a server reconnect or refreshIfFailed(), which also retries an invalid table; a session change always fetches again. An unexpected throw while preparing the table counts as an invalid table. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Pure functions for the Windsteer polar overlay: the polar curve in the wind frame (closed through the origin, mirrored port and starboard), a per-TWS speed profile reused across VMC recomputes, the VMC curve in the compass frame, the VMC dot radius, and the fixed speed-to-radius scale with clamping at the dial edge. SI in (m/s, rad), no Angular. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
A widget that reads a path only while an option is on needs to drop the registration when the option goes off; unobserve is the inverse of observe. sourceFromPath lets a hidden slot read with the Data Source the user chose for a visible slot, so an SI copy of a displayed value comes from the same sensor. It applies only while both slots read the same path: a source pinned for another path may never send this one. effectivePathConfig is exported so a caller outside the directive resolves a slot the same way. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Add the polarOverlayEnable option (off by default) and three hidden SI slots (TWS m/s, water TWA rad, STW m/s), observed only while the option is on. The TWS and water TWA slots take the Data Source of their display slots while those read the same path. The widget resolves the overlay mode (hidden, polar, VMC) from the option, the active polar status, input freshness, compass mode, heading and a fresh waypoint bearing, and computes the curve and dot geometry for the SVG. HDG and BTW are converted to radians once, where the geometry util is called. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Three groups: the VMC lobe in the compass frame inside the rotating dial after the wind sectors; the polar curve top-level after the compass, turned by the water TWA with the pointer's easing; the dot in the fixed boat frame after the crosshair, at the given radius on the bow axis. Polar mode is a bare purple line, VMC mode a translucent lobe with a solid edge, so the modes differ by treatment and not only colour. Stroke 8 and dot radius 16 keep 1.7 px and 7 px on a 215 px tile; a card-colour halo parts the dot from the curve in the single-hue night theme. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Opening the Wind Steer options starts the active polar service, or retries it after a failure, so the dialog can say why the overlay cannot draw before the user turns it on. It shows the service's fixed message, and once the polar is ready names any overlay input the server has never sent. The check reads DataService, so the Freeboard settings panel, which has no widget instance, shows the same hint. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Regenerate the MCP dashboard schema for the new option and SI slots, and say on the Windsteer help line that the overlay needs a polars resource provider with an active polar, and that the curve follows water wind, so it can sit offset from the pointer when the Ground wind angle is shown. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The mock serves v1 REST leaf values and v2 resources from control, so a scenario can publish an active polar the way a polar provider does. shot-windsteer gains --overlay polar, vmc and vmc-ahead states that check which overlay groups draw, and a windsteer-vmc scenario measures the overlay recomputing at 10 Hz. The run loop now clears per-scenario data between repeats, since setControl merges. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
The comment described a guard that was removed long ago rather than the code around it; the constructor comment already says how the stream callbacks are registered. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Summary
Adds an optional polar overlay to the Windsteer widget. With no active waypoint it draws the active polar's curve for the current true wind speed, plus a dot for the boat's speed through water, so the helmsman sees performance against the polar at the present angle. With an active waypoint in compass mode, the curve becomes a VMC lobe whose longest spoke is the best heading to the waypoint, and the dot shows the actual VMC.
Plan: #635 (Units 3–6). Stacked on #640, which frees the dial center.
Closes #478
Closes #635
How it works
polars.activePolarpointer. The Polar Performance plugin's own curve endpoint is admin-only on Signal K 2.31 and later, so it is not used; see the upstream discussion in Polar overlay: readonly polar query routes upstream, then evaluate the plugin endpoint #636.polar-math1.1.1 andpolar-format1.0.0 (Apache-2.0). Shipping the library itself would bringajv, which compiles its schema withnew Functionat load time, into the bundle.polar-mathstays a devDependency as the parity oracle: interpolation matches it within 1e-9 over a grid covering in irons, the pinch zone, and TWS inside, below and above the table.THIRD-PARTY-NOTICES.mdships the attribution and license text in the npm package.--skip-purple-coloris the one accent token the face did not use. The peak speed maps to r 300, inside the COG and waypoint ring at r ≈ 325.unobserve()and a declarativesourceFromPath, so the hidden paths can follow the source of their display counterpart.dashboards.mdcovers what the overlay needs and why its curve can sit offset from the pointer when the Ground TWA path is shown.Verification
npm run cipasses: lint, snc, 2400 unit tests, 34 MCP schema tests.windsteer-vmcscenario, with the VMC curve redrawn on every 10 Hz sample, 10× CPU throttle, 3 repeats:Not verified: a Freeboard embed tile screenshot (the settings panel is covered by a spec), and a real device.
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Summary
When enabled, the Windsteer widget shows the active polar curve and a boat-speed-through-water dot when the required wind inputs are fresh. In compass mode, when heading and waypoint bearing are also fresh, it shows the VMC curve, best heading, and actual VMC. The overlay stays hidden when required data is unavailable, and widget options explain missing polar or input data.
The active-polar service reads polar data from the Signal K v2 Resources API. A TypeScript polar engine validates and converts polar tables to SI units and calculates speeds. The change also adds rendering and service tests, plus a VMC performance-harness scenario.