LucaP
bc18bc2043
Integrate the Blender grand tourer with a cohesive shader-driven road, terrain, atmosphere, lighting, and post-processing pass. Refine responsive drive dynamics and sign lifecycle behavior, and add durable visual, accessibility, and performance verification evidence.
633 lines
23 KiB
TypeScript
633 lines
23 KiB
TypeScript
import { describe, expect, it, vi } from "vitest";
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import * as THREE from "three";
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import type { EnvironmentChapter } from "@/journey/types";
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import { renderQualityFor } from "@/scene/render-quality";
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import { SceneResourceBag } from "@/scene/resources";
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import {
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CHAPTER_PALETTES,
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createMutableChapterPalette,
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writeChapterPalette,
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} from "@/scene/world/palette";
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import { createRoad } from "@/scene/world/road";
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import { createTerrain } from "@/scene/world/terrain";
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import { createSun } from "@/scene/world/sun";
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import { createAtmosphere } from "@/scene/world/atmosphere";
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import { createPostProcessor } from "@/scene/post-processing";
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import { createCar } from "@/scene/world/car";
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import { createChaseCamera } from "@/scene/world/environment";
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import { createSign, routeLabelFor } from "@/scene/world/sign";
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import { createDriveDynamics } from "@/scene/drive-dynamics";
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describe("procedural world models", () => {
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it("scales geometry and atmosphere work monotonically by live quality tier", () => {
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const high = renderQualityFor("high", 3, false);
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const medium = renderQualityFor("medium", 3, false);
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const low = renderQualityFor("low", 3, false);
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expect(high.roadSegments).toBeGreaterThan(medium.roadSegments);
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expect(medium.roadSegments).toBeGreaterThan(low.roadSegments);
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expect(high.terrainSegments).toBeGreaterThan(medium.terrainSegments);
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expect(medium.terrainSegments).toBeGreaterThan(low.terrainSegments);
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expect(high.streakCount).toBeGreaterThan(low.streakCount);
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expect(low.postEffects).toBe(false);
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});
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it("builds a shader road whose motion is entirely uniform-driven", () => {
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const resources = new SceneResourceBag();
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const road = createRoad(resources, renderQualityFor("high", 1, false));
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const surface = road.group.getObjectByName(
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"road-surface",
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) as ShaderRenderable;
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expect(surface).toBeInstanceOf(THREE.Mesh);
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expect(surface.geometry.index).not.toBeNull();
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expect(surface.geometry.getAttribute("position").count).toBeGreaterThan(
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1_000,
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);
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expect(surface.material.uniforms).toMatchObject({
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uDistance: { value: 0 },
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uSpeed: { value: 0 },
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uAcceleration: { value: 0 },
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});
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expect(surface.material.fragmentShader).toContain("centerLane");
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expect(surface.material.fragmentShader).toContain("outerEdge");
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const positionArray = surface.geometry.getAttribute("position").array;
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const before = resources.snapshot();
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for (let index = 0; index < 300; index += 1) {
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road.update(index * 0.5, 0.65, 0.4);
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}
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expect(resources.snapshot()).toEqual(before);
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expect(surface.geometry.getAttribute("position").array).toBe(positionArray);
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expect(surface.material.uniforms.uDistance?.value).toBe(149.5);
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expect(surface.material.uniforms.uSpeed?.value).toBe(0.65);
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expect(surface.material.uniforms.uAcceleration?.value).toBe(0.4);
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resources.dispose();
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});
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it("builds one wide indexed line terrain with a flat road-center mask", () => {
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const resources = new SceneResourceBag();
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const terrain = createTerrain(
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resources,
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renderQualityFor("medium", 1, false),
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);
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const lines = terrain.group.getObjectByName(
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"terrain-grid",
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) as ShaderRenderable;
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expect(lines).toBeInstanceOf(THREE.LineSegments);
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expect(lines.geometry.index).not.toBeNull();
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lines.geometry.computeBoundingBox();
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expect(lines.geometry.boundingBox).not.toBeNull();
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expect(
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(lines.geometry.boundingBox?.max.x ?? 0) -
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(lines.geometry.boundingBox?.min.x ?? 0),
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).toBeGreaterThan(120);
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const roadMask = lines.geometry.getAttribute("roadMask");
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expect(roadMask).toBeDefined();
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const maskValues = Array.from(roadMask.array as ArrayLike<number>);
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expect(Math.min(...maskValues)).toBe(0);
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expect(Math.max(...maskValues)).toBeGreaterThan(0.99);
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expect(lines.material.uniforms).toMatchObject({
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uDistance: { value: 0 },
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uSpeed: { value: 0 },
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uRouteProgress: { value: 0 },
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uRelief: { value: expect.any(Number) },
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});
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expect(lines.material.vertexShader).toContain("multiOctaveNoise");
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expect(lines.material.vertexShader).toContain("mod(point, 256.0)");
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const indexArray = lines.geometry.index?.array;
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const positionArray = lines.geometry.getAttribute("position").array;
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const lowColor = lines.material.uniforms.uLowColor?.value;
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const highColor = lines.material.uniforms.uHighColor?.value;
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const before = resources.snapshot();
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for (let index = 0; index < 300; index += 1) {
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terrain.update(index * 0.4, 0.7, "builds", index / 299);
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}
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expect(resources.snapshot()).toEqual(before);
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expect(lines.geometry.index?.array).toBe(indexArray);
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expect(lines.geometry.getAttribute("position").array).toBe(positionArray);
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expect(lines.material.uniforms.uLowColor?.value).toBe(lowColor);
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expect(lines.material.uniforms.uHighColor?.value).toBe(highColor);
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expect(lines.material.uniforms.uRouteProgress?.value).toBe(1);
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resources.dispose();
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});
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it("writes deterministic chapter blends into stable color allocations", () => {
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const target = createMutableChapterPalette("deep-night");
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const colorReferences = [
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target.sky,
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target.fog,
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target.terrainLow,
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target.terrainHigh,
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target.sun,
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target.haze,
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];
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expect(Object.keys(CHAPTER_PALETTES)).toEqual([
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"deep-night",
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"systems",
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"infrastructure",
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"builds",
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"pre-dawn",
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"destination",
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] satisfies EnvironmentChapter[]);
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expect(writeChapterPalette(target, "deep-night", "destination", 0.5)).toBe(
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target,
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);
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const first = paletteSnapshot(target);
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expect(writeChapterPalette(target, "deep-night", "destination", 0.5)).toBe(
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target,
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);
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expect(paletteSnapshot(target)).toEqual(first);
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expect([
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target.sky,
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target.fog,
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target.terrainLow,
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target.terrainHigh,
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target.sun,
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target.haze,
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]).toEqual(colorReferences);
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expect(target.warmth).toBeGreaterThan(
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CHAPTER_PALETTES["deep-night"].warmth,
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);
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expect(target.warmth).toBeLessThan(CHAPTER_PALETTES.destination.warmth);
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});
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it("renders the sun as a scan-banded disc with a separately owned halo", () => {
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const resources = new SceneResourceBag();
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const sun = createSun(resources);
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const disc = sun.group.getObjectByName("horizon-sun") as ShaderRenderable;
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const halo = sun.group.getObjectByName("horizon-halo");
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expect(disc).toBeInstanceOf(THREE.Mesh);
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expect(halo).toBeInstanceOf(THREE.Sprite);
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expect(disc.material.uniforms).toMatchObject({
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uScanBands: { value: 11 },
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uWarmth: { value: CHAPTER_PALETTES["deep-night"].warmth },
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uTime: { value: 0 },
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});
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expect(disc.material.fragmentShader).toContain("scanBand");
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expect(resources.snapshot().owned.texture).toBe(1);
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const palette = createMutableChapterPalette("destination");
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sun.update(palette, 1, 3.2);
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expect(disc.material.uniforms.uWarmth?.value).toBe(1);
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expect(disc.material.uniforms.uRouteProgress?.value).toBe(1);
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resources.dispose();
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});
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it("builds deterministic stars, haze layers, and quality-capped speed streaks", () => {
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const highResources = new SceneResourceBag();
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const lowResources = new SceneResourceBag();
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const highQuality = renderQualityFor("high", 1, false);
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const lowQuality = renderQualityFor("low", 1, true);
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const high = createAtmosphere(highResources, highQuality);
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const low = createAtmosphere(lowResources, lowQuality);
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const highStars = high.group.getObjectByName(
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"atmosphere-stars",
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) as ShaderRenderable;
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const lowStars = low.group.getObjectByName(
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"atmosphere-stars",
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) as ShaderRenderable;
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const highStreaks = high.group.getObjectByName(
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"speed-streaks",
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) as ShaderRenderable;
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const lowStreaks = low.group.getObjectByName(
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"speed-streaks",
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) as ShaderRenderable;
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expect(highStars.geometry.getAttribute("position").count).toBe(
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highQuality.starCount,
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);
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expect(lowStars.geometry.getAttribute("position").count).toBe(
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lowQuality.starCount,
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);
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expect(highStars.material.uniforms).toMatchObject({
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uPointScale: { value: 18 },
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uMaxPointSize: { value: 4.5 },
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});
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expect(highStreaks.geometry.getAttribute("position").count).toBe(
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highQuality.streakCount * 2,
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);
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expect(lowStreaks.geometry.getAttribute("position").count).toBe(
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lowQuality.streakCount * 2,
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);
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expect(high.group.getObjectByName("horizon-haze")).toBeInstanceOf(
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THREE.Group,
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);
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const sky = high.group.getObjectByName("atmosphere-sky") as ShaderRenderable & {
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frustumCulled: boolean;
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};
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sky.geometry.computeBoundingBox();
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expect(sky.geometry.boundingBox?.min.x).toBeCloseTo(-1, 6);
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expect(sky.geometry.boundingBox?.max.x).toBeCloseTo(1, 6);
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expect(sky.material.vertexShader).toContain(
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"gl_Position = vec4(position.xy, 1.0, 1.0)",
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);
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expect(sky.frustumCulled).toBe(false);
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expect(sky.material.depthTest).toBe(false);
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const haze = high.group.getObjectByName(
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"horizon-haze-near",
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) as ShaderRenderable;
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expect(haze.material.vertexShader).toContain(
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"gl_Position = vec4(position.xy, 1.0, 1.0)",
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);
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expect(
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(high.group.getObjectByName("distant-silhouettes") as { children: unknown[] })
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.children,
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).toHaveLength(3);
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expect(high.group.getObjectByName("roadside-anchors")).toBeInstanceOf(
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THREE.InstancedMesh,
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);
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const highStarPositions = Array.from(
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highStars.geometry.getAttribute("position").array,
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);
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const secondResources = new SceneResourceBag();
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const secondHigh = createAtmosphere(secondResources, highQuality);
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const secondStars = secondHigh.group.getObjectByName(
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"atmosphere-stars",
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) as ShaderRenderable;
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expect(
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Array.from(secondStars.geometry.getAttribute("position").array),
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).toEqual(highStarPositions);
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const palette = createMutableChapterPalette("builds");
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const before = highResources.snapshot();
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for (let index = 0; index < 300; index += 1) {
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high.update(index, 0.7, 0.8, palette);
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}
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expect(highResources.snapshot()).toEqual(before);
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expect(highStreaks.material.uniforms.uAcceleration?.value).toBe(0.8);
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expect(highStreaks.material.uniforms.uVisibility?.value).toBeGreaterThan(0);
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high.setViewportAspect(32 / 9);
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expect(sky.material.uniforms.uAspect?.value).toBeCloseTo(32 / 9, 6);
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highResources.dispose();
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lowResources.dispose();
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secondResources.dispose();
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});
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it("keeps independent inertial response curves for the road, chase rig, streaks, bloom, and suspension", () => {
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const dynamics = createDriveDynamics();
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const stableSnapshot = dynamics.snapshot();
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dynamics.update(1, 1, 0.1);
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const attack = { ...dynamics.snapshot() };
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expect(dynamics.snapshot()).toBe(stableSnapshot);
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expect(attack.roadEnergy).toBeGreaterThan(attack.cameraEnergy);
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expect(attack.cameraEnergy).toBeGreaterThan(attack.bloomEnergy);
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expect(attack.streakEnergy).toBeGreaterThan(0);
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expect(attack.suspensionEnergy).toBeGreaterThan(0);
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expect(attack.directionBias).toBeGreaterThan(0);
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dynamics.update(0, 0, 0.1);
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const coast = dynamics.snapshot();
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expect(coast.roadEnergy).toBeLessThan(attack.roadEnergy);
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expect(coast.streakEnergy / attack.streakEnergy).toBeGreaterThan(
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coast.roadEnergy / attack.roadEnergy,
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);
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expect(coast.bloomEnergy).toBeGreaterThan(0);
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dynamics.update(1, -1, 10);
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expect(Object.values(dynamics.snapshot()).every(Number.isFinite)).toBe(true);
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expect(dynamics.snapshot().directionBias).toBeLessThan(1);
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});
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it("disposes a composer and its passes exactly once", () => {
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const resources = new SceneResourceBag();
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const target = (width: number, height: number, depthBuffer: boolean) => ({
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width,
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height,
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depthBuffer,
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samples: 1,
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dispose: vi.fn(),
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});
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const composer = {
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addPass: vi.fn(),
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setPixelRatio: vi.fn(),
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setSize: vi.fn(),
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render: vi.fn(),
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dispose: vi.fn(),
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renderTarget1: target(1_500, 1_000, true),
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renderTarget2: target(1_500, 1_000, true),
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};
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const renderPass = {
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scene: null,
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camera: null,
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setSize: vi.fn(),
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dispose: vi.fn(),
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};
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const bloomPass = {
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strength: 0.54,
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radius: 0.42,
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threshold: 0.88,
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setSize: vi.fn(),
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dispose: vi.fn(),
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renderTargetBright: target(750, 500, false),
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renderTargetsHorizontal: [target(375, 250, false)],
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renderTargetsVertical: [target(375, 250, false)],
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};
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const outputPass = {
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setSize: vi.fn(),
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dispose: vi.fn(),
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};
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const processor = createPostProcessor(
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resources,
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{},
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{
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createComposer: () => composer,
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createRenderPass: () => renderPass,
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createBloomPass: () => bloomPass,
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createOutputPass: () => outputPass,
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},
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);
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processor.resize(1_200, 800, 1.25);
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processor.setDynamics(0.75);
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processor.render({}, {});
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const allocations = resources.gpuBudgetSnapshot({
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tier: "high",
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defaultFramebuffer: {
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width: 1_500,
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height: 1_000,
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bytesPerPixel: 4,
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attachments: 2,
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samples: 4,
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},
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});
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expect(
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allocations.renderTargets.map((allocation) => allocation.id),
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).toEqual(
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expect.arrayContaining([
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"composer-target-1",
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"composer-target-2",
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"bloom-bright",
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"bloom-horizontal-0",
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"bloom-vertical-0",
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]),
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);
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processor.dispose();
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processor.dispose();
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resources.dispose();
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expect(composer.addPass).toHaveBeenCalledTimes(3);
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expect(composer.addPass).toHaveBeenLastCalledWith(outputPass);
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expect(composer.setPixelRatio).toHaveBeenCalledWith(1.25);
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expect(composer.setSize).toHaveBeenCalledWith(1_200, 800);
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expect(composer.render).toHaveBeenCalledOnce();
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expect(renderPass.dispose).toHaveBeenCalledOnce();
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expect(bloomPass.dispose).toHaveBeenCalledOnce();
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expect(outputPass.dispose).toHaveBeenCalledOnce();
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expect(composer.dispose).toHaveBeenCalledOnce();
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expect(bloomPass.strength).toBeGreaterThan(0.54);
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});
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it("keeps the grand tourer anatomy readable in desktop and portrait chase views", () => {
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const resources = new SceneResourceBag();
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const car = createCar(resources);
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for (const name of [
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"rear-silhouette",
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"rear-body-face",
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"rear-light-bar",
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"rear-glass",
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"rear-glass-panel",
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"rear-fascia",
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"rear-wheel-left",
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"rear-wheel-right",
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"car-underglow",
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"car-contact-shadow",
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]) {
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expect(car.group.getObjectByName(name), name).toBeDefined();
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}
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const desktopCamera = createChaseCamera(16 / 9);
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expect((desktopCamera as { fov: number }).fov).toBe(66);
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const desktop = projectedBounds(car.group, desktopCamera);
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expect(desktop.maxX - desktop.minX).toBeGreaterThan(0.28);
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expect(desktop.minX).toBeGreaterThan(-0.96);
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expect(desktop.maxX).toBeLessThan(0.96);
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expect(desktop.minY).toBeGreaterThan(-0.99);
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expect(desktop.maxY).toBeLessThan(-0.05);
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car.setDetail("reduced");
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const portrait = projectedBounds(car.group, createChaseCamera(390 / 844));
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expect(portrait.minX).toBeGreaterThan(-0.99);
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expect(portrait.maxX).toBeLessThan(0.99);
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expect(portrait.minY).toBeGreaterThan(-0.99);
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expect(portrait.maxY).toBeLessThan(0.16);
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expect(
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(car.group.getObjectByName("secondary-detail") as { visible: boolean })
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.visible,
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).toBe(false);
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resources.dispose();
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});
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it("wraps the authored GLB hierarchy without rebuilding it during animation", () => {
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const resources = new SceneResourceBag();
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const authored = new THREE.Group();
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authored.name = "chase-car";
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for (const name of [
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"car-body",
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"rear-glass",
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"rear-light-bar",
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"rear-diffuser",
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"car-underglow-source",
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]) {
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const material = name === "rear-light-bar"
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? new THREE.MeshStandardMaterial({ emissive: 0xff174f, emissiveIntensity: 8 })
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: new THREE.MeshStandardMaterial();
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const mesh = new THREE.Mesh(new THREE.BoxGeometry(1, 1, 1), material);
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mesh.name = name;
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authored.add(mesh);
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}
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const car = createCar(resources, authored);
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const childCount = (car.group as { children: unknown[] }).children.length;
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expect(
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(car.group.getObjectByName("grand-tourer-model") as { rotation: { y: number } })
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.rotation.y,
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).toBeCloseTo(Math.PI, 6);
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expect(car.group.getObjectByName("car-body")).toBeDefined();
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expect(
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(car.group.getObjectByName("car-body") as {
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material: { emissive: { getHex(): number } };
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}).material.emissive.getHex(),
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).toBe(0x0b2738);
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expect(car.group.getObjectByName("rear-glass")).toBeDefined();
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|
expect(car.group.getObjectByName("rear-light-bar")).toBeDefined();
|
|
expect(car.group.getObjectByName("car-underglow")).toBeDefined();
|
|
expect(car.group.getObjectByName("car-contact-shadow")).toBeDefined();
|
|
|
|
for (let frame = 0; frame < 60; frame += 1) {
|
|
car.update(0.8, 0.7, frame / 60);
|
|
}
|
|
expect((car.group as { children: unknown[] }).children).toHaveLength(childCount);
|
|
expect(resources.snapshot().owned.geometry).toBeGreaterThanOrEqual(6);
|
|
resources.dispose();
|
|
});
|
|
|
|
it("damps squat and light response without allocating or changing the scene graph", () => {
|
|
const resources = new SceneResourceBag();
|
|
const car = createCar(resources);
|
|
const light = car.group.getObjectByName("rear-light-bar") as {
|
|
material: { emissiveIntensity: number };
|
|
};
|
|
const underglow = car.group.getObjectByName("car-underglow") as {
|
|
material: { uniforms: Record<string, { value: number }> };
|
|
};
|
|
car.update(0.3, 0, 0);
|
|
const restingY = (car.group as { position: { y: number } }).position.y;
|
|
const restingLight = light.material.emissiveIntensity;
|
|
const restingGlow = underglow.material.uniforms.uOpacity?.value ?? 0;
|
|
const childCount = (car.group as { children: unknown[] }).children.length;
|
|
const allocation = resources.snapshot();
|
|
|
|
for (let frame = 1; frame <= 60; frame += 1) {
|
|
car.update(0.92, 1, frame / 60);
|
|
}
|
|
|
|
expect((car.group as { position: { y: number } }).position.y).toBeLessThan(
|
|
restingY,
|
|
);
|
|
expect(light.material.emissiveIntensity).toBeGreaterThan(restingLight);
|
|
expect(underglow.material.uniforms.uOpacity?.value).toBeGreaterThan(
|
|
restingGlow,
|
|
);
|
|
expect(
|
|
Math.abs((car.group as { rotation: { z: number } }).rotation.z),
|
|
).toBeLessThanOrEqual(0.006);
|
|
expect((car.group as { children: unknown[] }).children).toHaveLength(
|
|
childCount,
|
|
);
|
|
expect(resources.snapshot()).toEqual(allocation);
|
|
resources.dispose();
|
|
});
|
|
|
|
it("renders one physical roadside sign and updates its plain label once per target", () => {
|
|
const resources = new SceneResourceBag();
|
|
const sign = createSign(resources);
|
|
for (const name of [
|
|
"sign-backplate",
|
|
"sign-face",
|
|
"sign-frame",
|
|
"sign-post-left",
|
|
"sign-post-right",
|
|
]) {
|
|
expect(sign.group.getObjectByName(name), name).toBeDefined();
|
|
}
|
|
const face = sign.group.getObjectByName("sign-face") as {
|
|
userData: { textureUpdateCount: number };
|
|
material: { opacity: number };
|
|
};
|
|
const allocation = resources.snapshot();
|
|
|
|
sign.update(null);
|
|
expect((sign.group as { visible: boolean }).visible).toBe(false);
|
|
sign.update({
|
|
targetId: "infrastructure",
|
|
phase: "anticipate",
|
|
progress: 0,
|
|
opacity: 0,
|
|
});
|
|
expect((sign.group as { visible: boolean }).visible).toBe(false);
|
|
expect(face.userData.textureUpdateCount).toBe(1);
|
|
expect(routeLabelFor("infrastructure")).toBe("Infrastructure");
|
|
|
|
sign.update({
|
|
targetId: "infrastructure",
|
|
phase: "approach",
|
|
progress: 0.5,
|
|
opacity: 0.7,
|
|
});
|
|
expect((sign.group as { visible: boolean }).visible).toBe(true);
|
|
expect(face.userData.textureUpdateCount).toBe(1);
|
|
expect(face.material.opacity).toBeCloseTo(0.7, 6);
|
|
|
|
const desktopX = (sign.group as { position: { x: number } }).position.x;
|
|
sign.setViewportAspect(0.6);
|
|
sign.update({
|
|
targetId: "selected-builds",
|
|
phase: "dwell",
|
|
progress: 1,
|
|
opacity: 1,
|
|
});
|
|
expect(face.userData.textureUpdateCount).toBe(2);
|
|
expect(routeLabelFor("selected-builds")).toBe("Selected builds");
|
|
expect((sign.group as { position: { x: number } }).position.x).toBeLessThan(
|
|
desktopX,
|
|
);
|
|
expect(resources.snapshot()).toEqual(allocation);
|
|
resources.dispose();
|
|
});
|
|
});
|
|
|
|
function paletteSnapshot(
|
|
palette: ReturnType<typeof createMutableChapterPalette>,
|
|
) {
|
|
return {
|
|
sky: palette.sky.getHex(),
|
|
fog: palette.fog.getHex(),
|
|
terrainLow: palette.terrainLow.getHex(),
|
|
terrainHigh: palette.terrainHigh.getHex(),
|
|
sun: palette.sun.getHex(),
|
|
haze: palette.haze.getHex(),
|
|
warmth: palette.warmth,
|
|
terrainEnergy: palette.terrainEnergy,
|
|
starVisibility: palette.starVisibility,
|
|
streakEnergy: palette.streakEnergy,
|
|
};
|
|
}
|
|
|
|
interface ShaderRenderable {
|
|
geometry: {
|
|
index: { array: ArrayLike<number> } | null;
|
|
boundingBox: { min: { x: number }; max: { x: number } } | null;
|
|
computeBoundingBox(): void;
|
|
getAttribute(name: string): { count: number; array: ArrayLike<number> };
|
|
};
|
|
material: {
|
|
uniforms: Record<string, { value: unknown }>;
|
|
vertexShader: string;
|
|
fragmentShader: string;
|
|
depthTest: boolean;
|
|
};
|
|
}
|
|
|
|
function projectedBounds(group: unknown, camera: unknown) {
|
|
const typedGroup = group as { updateMatrixWorld(force: boolean): void };
|
|
const typedCamera = camera as { updateMatrixWorld(force: boolean): void };
|
|
typedGroup.updateMatrixWorld(true);
|
|
typedCamera.updateMatrixWorld(true);
|
|
const bounds = new THREE.Box3().setFromObject(group);
|
|
const projected = boxCorners(bounds).map((point) => point.project(camera));
|
|
return {
|
|
minX: Math.min(...projected.map((point) => point.x)),
|
|
maxX: Math.max(...projected.map((point) => point.x)),
|
|
minY: Math.min(...projected.map((point) => point.y)),
|
|
maxY: Math.max(...projected.map((point) => point.y)),
|
|
};
|
|
}
|
|
|
|
function boxCorners(bounds: {
|
|
min: { x: number; y: number; z: number };
|
|
max: { x: number; y: number; z: number };
|
|
}) {
|
|
return [
|
|
new THREE.Vector3(bounds.min.x, bounds.min.y, bounds.min.z),
|
|
new THREE.Vector3(bounds.min.x, bounds.min.y, bounds.max.z),
|
|
new THREE.Vector3(bounds.min.x, bounds.max.y, bounds.min.z),
|
|
new THREE.Vector3(bounds.min.x, bounds.max.y, bounds.max.z),
|
|
new THREE.Vector3(bounds.max.x, bounds.min.y, bounds.min.z),
|
|
new THREE.Vector3(bounds.max.x, bounds.min.y, bounds.max.z),
|
|
new THREE.Vector3(bounds.max.x, bounds.max.y, bounds.min.z),
|
|
new THREE.Vector3(bounds.max.x, bounds.max.y, bounds.max.z),
|
|
];
|
|
}
|