feat: daybreak finale turns the contact arrival into a sunrise with a dawn chord

src/scene/world/districts.ts

@@ -11,6 +11,7 @@ import type { SectionId } from '@/content/types';
 import { signAccentFor } from './sign';
 import { WORLD_DEPTH, WORLD_FAR_Z } from './metrics';
 import { BEAM_PARS, beamUniforms } from './headlights';
+import { DAWN_PARS, dawnLightUniforms } from './dawn-light';
 
 /** Roadside districts: each chapter raises its own landscape out of the ground
  * (server rows for Infrastructure, a workshop and cranes for Builds, a container
@@ -202,7 +203,7 @@ export function createDistricts(
     resources.own(
       'material',
       new THREE.ShaderMaterial({
-        uniforms: { ...shared, ...service, ...beamUniforms, uRise: rise, uPieceHeight: height },
+        uniforms: { ...shared, ...service, ...beamUniforms, ...dawnLightUniforms, uRise: rise, uPieceHeight: height },
         vertexShader: VERTEX,
         fragmentShader: `
           uniform vec3 uAccent;
@@ -211,6 +212,7 @@ export function createDistricts(
           varying float vRise;
           varying float vHeight;
           ${BEAM_PARS}
+          ${DAWN_PARS}
           ${serviced ? SERVICE_PARS : ''}
           void main() {
             ${FADES}
@@ -238,6 +240,8 @@ export function createDistricts(
             // HIGH BEAM: the headlights rake the facades they face.
             vec3 toLamp = normalize(uBeamOrigin - vWorld);
             color += vec3(1.0, 0.84, 0.66) * headlightBeam(vWorld) * (0.25 + 0.75 * abs(dot(n, toLamp))) * 0.35;
+            // END OF SHIFT: the facades catch first light from the low sun ahead.
+            color += dawnRim(n, normalize(cameraPosition - vWorld)) * 1.4;
             gl_FragColor = vec4(color, 1.0);
             #include <tonemapping_fragment>
             #include <colorspace_fragment>