feat: redesign roadside sign faces as exit signs with chapter accents

src/scene/world/sign.ts

@@ -2,6 +2,7 @@ import * as THREE from 'three';
 import type { SectionId } from '@/content/types';
 import type { SignSnapshot } from '@/journey/types';
 import {
+  SIGN_ROUTE_ORDER,
   signRouteFor,
   signViewportProfileFor,
   type SignCorridor,
@@ -18,7 +19,7 @@ interface ProjectingCamera {
 }
 
 const SIGN_MARKER_FONT =
-  '560 46px "Geist Mono Variable", ui-monospace, monospace';
+  '600 60px "Geist Mono Variable", ui-monospace, monospace';
 const SIGN_LABEL_FONT = '650 180px "Geist Variable", sans-serif';
 export interface SignWorld {
   group: SignGroup;
@@ -516,6 +517,7 @@ export function createSign(
         face.userData.textureUpdateCount += 1;
         face.userData.fontReadyWhenDrawn =
           document.fonts?.check(SIGN_LABEL_FONT) ?? true;
+        edgeMaterial.emissive.set(SIGN_ACCENTS[sign.targetId]);
         if (context)
           drawLabel(
             context,
@@ -693,60 +695,116 @@ function createClippedShape(width: number, height: number, cut: number) {
   return shape;
 }
 
+/** Chapter accents, matching the CSS --chapter-accent of each panel. */
+const SIGN_ACCENTS: Readonly<Record<SectionId, string>> = {
+  start: '#ff83c2',
+  profile: '#ff83c2',
+  experience: '#c4a2ff',
+  infrastructure: '#8be9ed',
+  'selected-builds': '#ffa68d',
+  'additional-work': '#ff83c2',
+  toolkit: '#c4a2ff',
+  contact: '#ffa68d',
+};
+
+export function signAccentFor(id: SectionId): string {
+  return SIGN_ACCENTS[id];
+}
+
+function nextRouteLabel(id: SectionId): string | null {
+  const index = SIGN_ROUTE_ORDER.indexOf(id);
+  const next = SIGN_ROUTE_ORDER[index + 1];
+  return next === undefined ? null : signRouteFor(next).label;
+}
+
+function chamferedRect(
+  context: CanvasRenderingContext2D,
+  x: number,
+  y: number,
+  width: number,
+  height: number,
+  cut: number,
+): void {
+  context.beginPath();
+  context.moveTo(x + cut, y);
+  context.lineTo(x + width - cut, y);
+  context.lineTo(x + width, y + cut);
+  context.lineTo(x + width, y + height);
+  context.lineTo(x, y + height);
+  context.lineTo(x, y + cut);
+  context.closePath();
+}
+
+/** Face layout shared with the DOM plates: exit tab, "then" line, chapter
+ * label and an exit arrow that points toward the sign's side of the road. */
 function drawLabel(
   context: CanvasRenderingContext2D,
   route: SignRouteSpec,
   width: number,
   height: number,
 ): void {
+  const accent = SIGN_ACCENTS[route.id];
   context.clearRect(0, 0, width, height);
   context.save();
   context.scale(width / 2_048, height / 512);
   context.imageSmoothingEnabled = true;
   context.imageSmoothingQuality = 'high';
-
-  context.globalAlpha = 0.16;
-  context.fillStyle = '#cfabcd';
-  for (const [x, y, scratchWidth] of [
-    [312, 84, 142],
-    [742, 424, 96],
-    [1_116, 66, 188],
-    [1_488, 446, 112],
-  ] as const) {
-    context.fillRect(x, y, scratchWidth, 2);
-  }
-
-  context.globalAlpha = 1;
-  context.fillStyle = '#ff95cd';
-  context.fillRect(82, 72, 10, 368);
-  context.fillStyle = '#bbaae0';
-  context.font = SIGN_MARKER_FONT;
   context.textAlign = 'left';
   context.textBaseline = 'middle';
-  context.fillText(`ROUTE ${route.marker} / NEXT`, 142, 120);
 
-  context.globalAlpha = 0.6;
-  context.fillStyle = '#61416d';
-  context.fillRect(142, 174, 1_610, 2);
+  // Exit tab.
+  context.font = '720 66px "Geist Mono Variable", ui-monospace, monospace';
+  const tabText = `EXIT ${route.marker}`;
+  const tabWidth = context.measureText(tabText).width + 72;
+  context.fillStyle = accent;
+  chamferedRect(context, 96, 50, tabWidth, 116, 18);
+  context.fill();
+  context.fillStyle = '#160b22';
+  context.fillText(tabText, 132, 110);
 
-  context.globalAlpha = 1;
+  // "Then" line: the next exit on the route.
+  const next = nextRouteLabel(route.id);
+  context.font = SIGN_MARKER_FONT;
+  context.fillStyle = '#d8c9ea';
+  context.fillText(
+    next === null ? 'END OF ROUTE' : `THEN \u2192 ${next.toUpperCase()}`,
+    96 + tabWidth + 40,
+    110,
+  );
+
+  // Chapter label.
   context.fillStyle = '#fff2df';
-  const labelSize = fittedLabelSize(context, route.label, 1_520);
+  const labelSize = fittedLabelSize(context, route.label, 1_480);
   context.font = `650 ${labelSize}px "Geist Variable", sans-serif`;
-  context.fillText(route.label, 142, 326);
+  context.fillText(route.label, 96, 322);
 
-  context.strokeStyle = '#ffb879';
-  context.lineWidth = 10;
+  // Lane rule under the label.
+  context.globalAlpha = 0.7;
+  context.fillStyle = accent;
+  context.fillRect(96, 448, 1_380, 6);
+  context.globalAlpha = 0.35;
+  for (let x = 1_500; x < 1_940; x += 64) context.fillRect(x, 448, 34, 6);
+  context.globalAlpha = 1;
+
+  // Exit arrow: leans toward the roadside the sign stands on.
+  const leansLeft = route.corridor === 'left' || route.corridor === 'outer-left';
+  context.save();
+  context.translate(1_800, 270);
+  if (leansLeft) context.scale(-1, 1);
+  context.rotate(-Math.PI / 4);
+  context.strokeStyle = accent;
+  context.lineWidth = 22;
   context.lineCap = 'square';
   context.lineJoin = 'miter';
   context.beginPath();
-  context.moveTo(1_776, 304);
-  context.lineTo(1_890, 304);
-  context.lineTo(1_846, 260);
-  context.moveTo(1_890, 304);
-  context.lineTo(1_846, 348);
+  context.moveTo(-110, 0);
+  context.lineTo(100, 0);
+  context.moveTo(30, -70);
+  context.lineTo(100, 0);
+  context.lineTo(30, 70);
   context.stroke();
   context.restore();
+  context.restore();
 }
 
 function fittedLabelSize(