S-101 Fixes

internal/engine/bake/bake_test.go

@@ -15,8 +15,8 @@ import (
 const goldenCell = "../../../testdata/US4MD81M.000"
 
 func TestBandForScale(t *testing.T) {
-	if BandForScale(12_000).ZoomRange() != (ZoomRange{14, 16}) {
-		t.Error("12k should be harbor [14,16]")
+	if BandForScale(12_000).ZoomRange() != (ZoomRange{13, 16}) {
+		t.Error("12k should be harbor [13,16]")
 	}
 	if BandForScale(3_000_000) != BandOverview {
 		t.Error("3M should be overview")
@@ -343,41 +343,40 @@ func TestSoundingGrouping(t *testing.T) {
 }
 
 func TestSectorLights(t *testing.T) {
-	// expandSector: a sector -> 2 short legs (sleg 0) + 2 full-length legs
-	// (sleg 1) + OUTLW underlay + coloured arc (both sleg -1, always shown).
-	anchor := mustLatLon(38.97, -76.49)
-	strokes := expandSector(anchor, sp(0, 90, "LITRD"), 14)
-	if len(strokes) != 6 {
-		t.Fatalf("sector strokes = %d, want 6", len(strokes))
-	}
-	if !strokes[0].dashed || strokes[0].colorToken != "CHBLK" || strokes[0].sleg != 0 {
+	// tessellateFigure drives each constructed figure element off the rule's params.
+	// A leg with a nominal range emits the short (sleg 0) + extended full-length
+	// (sleg 1) variants, both dashed in the rule's colour, for the client's toggle.
+	leg := tessellateFigure(legPrim(90, 8), 14)
+	if len(leg) != 2 {
+		t.Fatalf("leg strokes = %d, want 2 (short + full)", len(leg))
+	}
+	if !leg[0].dashed || leg[0].colorToken != "CHBLK" || leg[0].sleg != 0 {
 		t.Error("stroke 0 should be the dashed CHBLK short leg (sleg 0)")
 	}
-	if !strokes[2].dashed || strokes[2].colorToken != "CHBLK" || strokes[2].sleg != 1 {
-		t.Error("stroke 2 should be the dashed CHBLK full-length leg (sleg 1)")
-	}
-	if strokes[4].colorToken != "OUTLW" || strokes[4].widthPx != 4 || strokes[4].sleg != -1 {
-		t.Error("stroke 4 should be the 4px OUTLW arc underlay (sleg -1)")
+	if leg[1].sleg != 1 {
+		t.Error("stroke 1 should be the full-length leg (sleg 1)")
 	}
-	if strokes[5].colorToken != "LITRD" || strokes[5].widthPx != 2 || strokes[5].dashed || strokes[5].sleg != -1 {
-		t.Error("stroke 5 should be the 2px solid LITRD arc (sleg -1)")
-	}
-	// A light with a VALNMR nominal range emits full legs (sleg 1) longer than
-	// the 25 mm short legs (sleg 0) — the toggle's whole point.
-	spR := sp(0, 90, "LITRD")
-	spR.RadiusNM = 8
-	withR := expandSector(anchor, spR, 14)
 	legLen := func(s sectorStroke) float64 {
 		return absf(s.points[1].Lat-s.points[0].Lat) + absf(s.points[1].Lon-s.points[0].Lon)
 	}
-	if legLen(withR[2]) <= legLen(withR[0]) {
-		t.Errorf("full leg (%.6f) should be longer than short leg (%.6f)", legLen(withR[2]), legLen(withR[0]))
+	if legLen(leg[1]) <= legLen(leg[0]) {
+		t.Errorf("full leg (%.6f) should be longer than short leg (%.6f)", legLen(leg[1]), legLen(leg[0]))
+	}
+	// A leg with no nominal range is a single always-shown stroke (sleg -1).
+	plain := tessellateFigure(legPrim(90, 0), 14)
+	if len(plain) != 1 || plain[0].sleg != -1 {
+		t.Errorf("plain leg = %+v, want 1 stroke sleg -1", plain)
 	}
-	// Screen-fixed: lat span ~halves per zoom level.
-	r14 := expandSector(anchor, sp(0, 0, "LITYW"), 14) // ring
-	r15 := expandSector(anchor, sp(0, 0, "LITYW"), 15)
-	span := func(s []sectorStroke) float64 { return absf(s[len(s)-1].points[0].Lat - anchor.Lat) }
-	if ratio := span(r14) / span(r15); ratio < 1.9 || ratio > 2.1 {
+	// An arc/ring is one stroke in the rule's colour (white light → yellow LITYW),
+	// always shown (sleg -1). Screen-fixed: the radius ~halves per zoom level.
+	arc14 := tessellateFigure(arcPrim(26, 0, 360, "LITYW"), 14)
+	if len(arc14) != 1 || arc14[0].colorToken != "LITYW" || arc14[0].sleg != -1 {
+		t.Fatalf("arc = %+v, want 1 LITYW stroke sleg -1", arc14)
+	}
+	arc15 := tessellateFigure(arcPrim(26, 0, 360, "LITYW"), 15)
+	anchor := mustLatLon(38.97, -76.49)
+	span := func(s []sectorStroke) float64 { return absf(s[0].points[0].Lat - anchor.Lat) }
+	if ratio := span(arc14) / span(arc15); ratio < 1.9 || ratio > 2.1 {
 		t.Errorf("ring radius ratio z14/z15 = %.3f, want ~2", ratio)
 	}
 }
@@ -388,8 +387,8 @@ func TestSectorLights(t *testing.T) {
 // suppressed only where a finer prim sits on it. zMax is set > natMax to simulate
 // the overzoomed coarse prim and drive the branch directly.
 func TestUpSuppressionPointOverlap(t *testing.T) {
-	coastal := BandCoastal.ZoomRange() // {10,12}
-	harbor := BandHarbor.ZoomRange()   // {14,16}
+	coastal := BandCoastal.ZoomRange() // {9,11}
+	harbor := BandHarbor.ZoomRange()   // {13,16}
 	base := geo.LatLon{Lat: 38.97, Lon: -76.49}
 	mk := func(b *Baker, ll geo.LatLon, layer string, zr ZoomRange, zMax uint32) {
 		r := routed{layer: layer, kind: mvt.GeomPoint, npoint: normPt(ll),
@@ -419,8 +418,22 @@ func TestUpSuppressionPointOverlap(t *testing.T) {
 }
 
 func mustLatLon(lat, lon float64) geo.LatLon { return geo.LatLon{Lat: lat, Lon: lon} }
-func sp(start, end float64, color string) portrayal.SectorParams {
-	return portrayal.SectorParams{StartAngleDeg: start, EndAngleDeg: end, ColorToken: color}
+
+// legPrim / arcPrim build a one-element sector figure (as the rule emits) at a
+// fixed anchor: a dashed CHBLK leg at the given bearing (fullNM>0 enables the
+// extended variant), or a coloured arc/ring.
+func legPrim(bearingDeg, fullNM float64) *sectorPrim {
+	return &sectorPrim{fig: portrayal.AugmentedFigure{
+		Anchor: mustLatLon(38.97, -76.49), Ray: true, BearingDeg: bearingDeg,
+		LengthMM: 25, ColorToken: "CHBLK", WidthMM: 0.32, Dash: portrayal.DashDashed,
+		FullLengthNM: fullNM,
+	}}
+}
+func arcPrim(radiusMM, startDeg, sweepDeg float64, color string) *sectorPrim {
+	return &sectorPrim{fig: portrayal.AugmentedFigure{
+		Anchor: mustLatLon(38.97, -76.49), RadiusMM: radiusMM,
+		StartDeg: startDeg, SweepDeg: sweepDeg, ColorToken: color, WidthMM: 0.64,
+	}}
 }
 
 func absf(x float64) float64 {

internal/engine/bake/complexline.go

@@ -60,7 +60,7 @@ func (b *Baker) emitComplexLine(r *routed, proj tile.Projector, rect tile.Rect,
 	}
 
 	// Screen px -> tile units. The baker lays figures out in 256-px-per-tile space
-	// (see sectorRadiusNorm/expandSector); one tile is `extent` units wide.
+	// (see sectorRadiusNorm/tessellateFigure); one tile is `extent` units wide.
 	pxScale := float64(extent) / 256.0
 	period := info.periodPx * pxScale
 	if period < 1e-6 {

internal/engine/portrayal/build.go

@@ -21,6 +21,17 @@ type FeatureBuild struct {
 	Primitives      []Primitive
 	DisplayPriority int
 	DisplayCategory int
+	// DateStart/DateEnd/TimeValid carry the feature's date dependency when it has
+	// one (S-57 DATSTA/DATEND fixed window or PERSTA/PEREND periodic window), so the
+	// baker can tag the feature and a date-aware client show/hide it against the
+	// current date. Empty when the feature is not date-dependent. DateStart/DateEnd
+	// are S-57 date strings — full "YYYYMMDD" (fixed) or partial "--MMDD" recurring
+	// each year (periodic); TimeValid is the interval kind (closedInterval /
+	// geSemiInterval / leSemiInterval). The feature also carries the CHDATD01
+	// date-dependent marker symbol among its primitives.
+	DateStart string
+	DateEnd   string
+	TimeValid string
 }
 
 // geom is the portrayal-space geometry handed to the instruction walk. It mirrors
@@ -110,6 +121,16 @@ func applyDangerDepth(prims []Primitive, class string, attrs map[string]interfac
 	return prims
 }
 
+// stringAttr returns an attribute's encoded string value, or "" when absent.
+func stringAttr(attrs map[string]interface{}, key string) string {
+	if v, ok := attrs[key]; ok {
+		if s, ok := encodeAttr(v); ok {
+			return s
+		}
+	}
+	return ""
+}
+
 func floatAttr(attrs map[string]interface{}, key string) (float64, bool) {
 	v, ok := attrs[key]
 	if !ok || v == nil {

internal/engine/portrayal/primitive.go

@@ -1,6 +1,6 @@
 // Package portrayal turns one S-57 feature into a stream of viewport-independent
-// lat/lon Primitives by running the S-101 portrayal rules and lowering the
-// emitted drawing instructions, stopping short of projection and colour
+// lat/lon Primitives by running the S-101 portrayal rules and emitting a
+// primitive for each drawing instruction, stopping short of projection and colour
 // resolution. Colour stays as *token* strings; the tile engine
 // projects/clips/encodes the Primitives into MVT and the browser resolves
 // Day/Dusk/Night from colortables.json.
@@ -141,29 +141,37 @@ type TextHalo struct {
 	WidthPx    float32
 }
 
-// SectorLight is LIGHTS06 sector geometry (legs / arc / ring). Only the lat/lon
-// anchor plus the S-52 sector parameters are cached; the screen-space
-// tessellation happens at projection time because radii are display millimetres.
-type SectorLight struct {
+// AugmentedFigure is one stroked element of a screen-space figure the S-101 rule
+// CONSTRUCTED via AugmentedRay / ArcByRadius (a light-sector leg or arc/ring) —
+// driven by the catalogue's own bearings, radii, colours and widths rather than a
+// Go re-derivation from S-57 attributes. One primitive = one stroked element; a
+// sectored light emits several (two dashed legs, then a black-backed coloured
+// arc). The mm sizes are screen-fixed, so the baker tessellates per-zoom into
+// `sector_lines`; it cannot bake as static geographic geometry.
+type AugmentedFigure struct {
 	Anchor geo.LatLon
-	Sector SectorParams
-}
-
-// SectorParams carries the S-52 LIGHTS06 sector parameters. Populated from the
-// s52 SectorInstruction the CS procedure emits.
-type SectorParams struct {
-	StartAngleDeg float64 // SECTR1, 0=North, clockwise
-	EndAngleDeg   float64 // SECTR2, 0=North, clockwise
-	RadiusNM      float64 // VALNMR nominal range, nautical miles
-	ColorToken    string  // LITRD/LITGN/LITYW/...
-	Transparency  int     // 0=opaque..3=75%
-	ShowLegs      bool
+	Ray    bool // true: a straight leg (Bearing/Length); false: an arc/ring
+	// Ray params (true-north bearing, already from-seaward-reversed by the rule).
+	BearingDeg float64
+	LengthMM   float64
+	// Arc params (centred on Anchor); a full 360° sweep is an all-round ring.
+	RadiusMM float64
+	StartDeg float64
+	SweepDeg float64
+	// Stroke style, from the rule's LineStyle:_simple_.
+	ColorToken string
+	WidthMM    float64
+	Dash       Dash
+	// FullLengthNM is the LIGHTS nominal range (VALNMR); when set on a ray, the
+	// baker also emits the "full light lines" leg variant extended to that range
+	// (S-52 LIGHTS06 note 1), tagged for the client's live toggle. 0 = no variant.
+	FullLengthNM float64
 }
 
-func (FillPolygon) isPrimitive() {}
-func (StrokeLine) isPrimitive()  {}
-func (SymbolCall) isPrimitive()  {}
-func (PatternFill) isPrimitive() {}
-func (LinePattern) isPrimitive() {}
-func (DrawText) isPrimitive()    {}
-func (SectorLight) isPrimitive() {}
+func (FillPolygon) isPrimitive()     {}
+func (StrokeLine) isPrimitive()      {}
+func (SymbolCall) isPrimitive()      {}
+func (PatternFill) isPrimitive()     {}
+func (LinePattern) isPrimitive()     {}
+func (DrawText) isPrimitive()        {}
+func (AugmentedFigure) isPrimitive() {}

internal/engine/portrayal/s101build.go

@@ -61,16 +61,17 @@ func newS101Builder(catalogFS fs.FS, fcBytes []byte) (*S101Builder, error) {
 
 // S101Builder is the feature-build seam: it runs the S-101 portrayal rules (via
 // the fc-backed Lua engine) for a batch of features, parses each emitted
-// instruction stream, and lowers each draw onto the feature geometry to produce
-// the Primitive stream the baker consumes.
+// instruction stream, and emits a primitive for each draw onto the feature
+// geometry to produce the Primitive stream the baker consumes.
 type S101Builder struct {
 	rulesFS fs.FS
 	fcCat   *fc.Catalogue
 	Catalog *catalog.Catalog
 }
 
 // BuildBatch portrays a whole cell's features in ONE engine pass (one chunk
-// compile, one portrayal context) and lowers each onto its geometry. A fresh
+// compile, one portrayal context) and emits primitives for each onto its
+// geometry. A fresh
 // Lua state is used and closed here so the per-cell caches don't accumulate.
 // Returns featureID → build for every feature.
 func (b *S101Builder) BuildBatch(features []*s57.Feature) (map[int64]FeatureBuild, error) {
@@ -111,7 +112,7 @@ func (b *S101Builder) BuildBatchOverrides(features []*s57.Feature, overrides map
 		// resolve a REAL point spatial (HostGetSpatial '#P'/'#M'). SOUNDG is a
 		// multipoint (the Sounding rule iterates each point's depth); other point
 		// features are a single point. This is required even when the geometry is
-		// otherwise attached by the Go lowering: a rule that reads feature.Point /
+		// otherwise attached when the Go side emits primitives: a rule that reads feature.Point /
 		// feature.Spatial would otherwise hit the framework's GetSpatial infinite
 		// recursion (it reads self['Spatial'] right after assigning it nil, which
 		// re-fires __index) — the cause of the OBSTRN/WRECKS stack overflows.
@@ -143,7 +144,7 @@ func (b *S101Builder) BuildBatchOverrides(features []*s57.Feature, overrides map
 	}
 	out := make(map[int64]FeatureBuild, len(features))
 	for _, f := range features {
-		out[f.ID()] = b.lower(f, streams[strconv.FormatInt(f.ID(), 10)])
+		out[f.ID()] = b.buildFeature(f, streams[strconv.FormatInt(f.ID(), 10)])
 	}
 	return out, nil
 }
@@ -158,8 +159,8 @@ func (b *S101Builder) Build(f *s57.Feature) (FeatureBuild, bool) {
 	return m[f.ID()], true
 }
 
-// lower turns one feature's emitted instruction stream into its FeatureBuild.
-func (b *S101Builder) lower(f *s57.Feature, stream string) FeatureBuild {
+// buildFeature turns one feature's emitted instruction stream into its FeatureBuild.
+func (b *S101Builder) buildFeature(f *s57.Feature, stream string) FeatureBuild {
 	// Genuinely-unknown object class (no S-101 alias) → the magenta "unknown
 	// object" mark (S-52 §10.1.1 parity).
 	if strings.HasPrefix(stream, "UNMAPPED:") {
@@ -180,10 +181,16 @@ func (b *S101Builder) lower(f *s57.Feature, stream string) FeatureBuild {
 	var prims []Primitive
 	priority := 0
 	cat := 0 // unset; resolved from the viewing groups the rule emits
+	var dateStart, dateEnd, timeValid string
 	for _, c := range cmds {
 		if c.Priority > priority {
 			priority = c.Priority
 		}
+		// Date dependency is feature-level (one Date:/TimeValid: pair the rule emits
+		// up front, carried onto every draw): capture it once for the FeatureBuild.
+		if timeValid == "" && (c.TimeValid != "" || c.DateStart != "" || c.DateEnd != "") {
+			dateStart, dateEnd, timeValid = c.DateStart, c.DateEnd, c.TimeValid
+		}
 		// The shallow-water pattern (SEABED01 emits AreaFillReference:DIAMOND1 in
 		// viewing group 90000 on every depth area shallower than the safety
 		// contour) is a MARINER SELECTION, not a fixed portrayal. The client owns
@@ -203,26 +210,40 @@ func (b *S101Builder) lower(f *s57.Feature, stream string) FeatureBuild {
 		if dc := displayCategoryForViewingGroup(c.ViewingGroup); dc != 0 && (cat == 0 || dc < cat) {
 			cat = dc
 		}
-		prims = append(prims, LowerS101(c, sg, b.Catalog)...)
+		prims = append(prims, emitPrimitives(c, sg, b.Catalog)...)
 	}
-	// Soundings: tag each lowered glyph with its depth so the baker emits the
+	// Soundings: tag each emitted glyph with its depth so the baker emits the
 	// numeric depth + S/G palette variants. Without this the client's depth-unit
 	// conversion (synthSounding) and SNDFRM04 safety-depth split fall back to the
 	// static metric glyphs and never react to those settings.
 	if f.ObjectClass() == "SOUNDG" {
 		attachSoundingDepths(prims, soundingPoints(f.Geometry()))
 	}
-	// Sector / directional light figures: the rule's AugmentedRay / ArcByRadius
-	// geometry is fixed display-mm (screen size) and isn't lowered onto geographic
-	// geometry; emit a SectorLight the baker tessellates per-zoom instead.
-	prims = append(prims, sectorLightPrims(f, anchor)...)
+	// Sector / directional lights: the rule constructs the legs + arc as screen-space
+	// AugmentedFigure elements (emitted above from the AugmentedRay / ArcByRadius
+	// instructions). Tag each leg with the light's nominal range (VALNMR) so the
+	// baker can also emit the "full light lines" leg variant for the client's live
+	// toggle (S-52 LIGHTS06 note 1).
+	if f.ObjectClass() == "LIGHTS" {
+		if vnr, ok := floatAttr(f.Attributes(), "VALNMR"); ok && vnr > 0 {
+			for i := range prims {
+				if fig, ok := prims[i].(AugmentedFigure); ok && fig.Ray {
+					fig.FullLengthNM = vnr
+					prims[i] = fig
+				}
+			}
+		}
+	}
 	if cat == 0 {
 		cat = displayStandard // no display-category band emitted (e.g. text-only)
 	}
 	return FeatureBuild{
 		Primitives:      prims,
 		DisplayPriority: priority,
 		DisplayCategory: cat,
+		DateStart:       dateStart,
+		DateEnd:         dateEnd,
+		TimeValid:       timeValid,
 	}
 }
 
@@ -299,7 +320,7 @@ func soundingPoints(g s57.Geometry) [][3]float64 {
 	return pts
 }
 
-// attachSoundingDepths sets SoundingDepthM on each lowered sounding glyph from the
+// attachSoundingDepths sets SoundingDepthM on each emitted sounding glyph from the
 // SOUNDG multipoint, matching by anchor (the glyphs are placed at their sounding's
 // lon/lat via AugmentedPoint). The depth then reaches the baker, which emits the
 // numeric depth + S/G palette variants the client needs for live depth-unit