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refactor: replace webgl-layer-framework with webgl-layer module

Browse source 
- Removed the webgl-layer-framework module and its associated tests.
- Introduced a new webgl-layer module to handle WebGL2 layer management.
- Updated references throughout the codebase to use the new webgl-layer module.
- Adjusted layer registration and rendering logic to align with the new structure.
- Ensured compatibility with existing functionality while improving modularity.
This commit is contained in:
Azgaar 2026-03-12 19:15:49 +01:00
parent d1d31da864
commit 9e00d69843
37 changed files with 380 additions and 7187 deletions
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window.addEventListener('load', addSorting);

902
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">import { Group, OrthographicCamera, Scene, WebGLRenderer } from "three";
&nbsp;
/**
* Converts a D3 zoom transform into orthographic camera bounds.
*
* D3 applies: screen = map * scale + (viewX, viewY)
* Inverting: map = (screen - (viewX, viewY)) / scale
*
* Orthographic bounds (visible map region at current zoom/pan):
* left = -viewX / scale
* right = (graphWidth - viewX) / scale
* top = -viewY / scale
* bottom = (graphHeight - viewY) / scale
*
* top &lt; bottom: Y-down matches SVG; origin at top-left of map.
* Do NOT swap top/bottom or negate — this is correct Three.js Y-down config.
*/
export function buildCameraBounds(
viewX: number,
viewY: number,
scale: number,
graphWidth: number,
graphHeight: number,
): { left: number; right: number; top: number; bottom: number } {
return {
left: (0 - viewX) / scale,
right: (graphWidth - viewX) / scale,
top: (0 - viewY) / scale,
bottom: (graphHeight - viewY) / scale,
};
}
&nbsp;
/**
* Detects WebGL2 support by probing canvas.getContext("webgl2").
* Accepts an optional injectable probe canvas for testability (avoids DOM access in tests).
* Immediately releases the probed context via WEBGL_lose_context if available.
*/
export function detectWebGL2(probe?: HTMLCanvasElement): boolean {
const canvas = probe ?? document.createElement("canvas");
const ctx = canvas.getContext("webgl2");
if (!ctx) return false;
const ext = ctx.getExtension("WEBGL_lose_context");
ext?.loseContext();
return true;
}
&nbsp;
/**
* Returns the CSS z-index for a canvas layer anchored to the given SVG element id.
* Phase 2 forward-compatible: derives index from DOM sibling position (+1 offset).
* Falls back to 2 (above #map SVG at z-index 1) when element is absent or document
* is unavailable (e.g. Node.js test environment).
*
* MVP note: #terrain is a &lt;g&gt; inside &lt;svg#map&gt;, not a sibling of #map-container,
* so this always resolves to the fallback 2 in MVP. Phase 2 (DOM-split) will give
* true per-layer interleaving values automatically.
*/
export function getLayerZIndex(anchorLayerId: string): number {
if (typeof document === "undefined") return 2;
const anchor = document.getElementById(anchorLayerId);
<span class="missing-if-branch" title="else path not taken" >E</span>if (!anchor) return 2;
const siblings = <span class="cstat-no" title="statement not covered" >Array.from(anchor.parentElement?.children ?? []);</span>
const idx = siblings.indexOf(anchor);
// +1 so Phase 2 callers get a correct interleaving value automatically
return idx &gt; 0 ? idx + 1 : 2;
}
&nbsp;
// ─── Interfaces ──────────────────────────────────────────────────────────────
&nbsp;
export interface WebGLLayerConfig {
id: string;
anchorLayerId: string; // SVG &lt;g&gt; id; canvas id derived as `${id}Canvas`
renderOrder: number; // Three.js renderOrder for this layer's Group
setup: (group: Group) =&gt; void; // called once after WebGL2 confirmed; add meshes to group
render: (group: Group) =&gt; void; // called each frame before renderer.render(); update uniforms/geometry
dispose: (group: Group) =&gt; void; // called on unregister(); dispose all GPU objects in group
}
&nbsp;
// Not exported — internal framework bookkeeping only
interface RegisteredLayer {
config: WebGLLayerConfig;
group: Group; // framework-owned; passed to all callbacks — abstraction boundary
}
&nbsp;
export class WebGL2LayerFrameworkClass {
private canvas: HTMLCanvasElement | null = null;
private renderer: WebGLRenderer | null = null;
private camera: OrthographicCamera | null = null;
private scene: Scene | null = null;
private layers: Map&lt;string, RegisteredLayer&gt; = new Map();
private pendingConfigs: WebGLLayerConfig[] = []; // queue for register() before init()
private resizeObserver: ResizeObserver | null = null;
private rafId: number | null = null;
private container: HTMLElement | null = null;
private _fallback = false;
&nbsp;
get hasFallback(): boolean {
return this._fallback;
}
&nbsp;
init(): boolean {
this._fallback = !detectWebGL2();
if (this._fallback) return false;
&nbsp;
const mapEl = document.getElementById("map");
if (!mapEl) {
console.warn(
"WebGL2LayerFramework: #map element not found — init() aborted",
);
return false;
}
&nbsp;
// Wrap #map in a positioned container so the canvas can be a sibling with z-index
const container = document.createElement("div");
container.id = "map-container";
container.style.position = "relative";
mapEl.parentElement!.insertBefore(container, mapEl);
container.appendChild(mapEl);
this.container = container;
&nbsp;
// Canvas: sibling to #map, pointerless, z-index above SVG (AC1)
const canvas = document.createElement("canvas");
canvas.id = "terrainCanvas";
canvas.style.position = "absolute";
canvas.style.inset = "0";
canvas.style.pointerEvents = "none";
canvas.setAttribute("aria-hidden", "true");
canvas.style.zIndex = String(getLayerZIndex("terrain"));
canvas.width = container.clientWidth || <span class="branch-1 cbranch-no" title="branch not covered" >960;</span>
canvas.height = container.clientHeight || <span class="branch-1 cbranch-no" title="branch not covered" >540;</span>
container.appendChild(canvas);
this.canvas = canvas;
&nbsp;
// Three.js core objects (AC4)
this.renderer = new WebGLRenderer({
canvas,
antialias: false,
alpha: true,
});
this.renderer.setSize(canvas.width, canvas.height);
this.scene = new Scene();
this.camera = new OrthographicCamera(
0,
canvas.width,
0,
canvas.height,
-1,
1,
);
&nbsp;
this.subscribeD3Zoom();
&nbsp;
// Process pre-init registrations (register() before init() is explicitly safe)
for (const config of this.pendingConfigs) {
const group = new Group();
group.renderOrder = config.renderOrder;
config.setup(group);
this.scene.add(group);
this.layers.set(config.id, { config, group });
}
this.pendingConfigs = [];
this.observeResize();
&nbsp;
return true;
}
&nbsp;
register(config: WebGLLayerConfig): void {
<span class="missing-if-branch" title="else path not taken" >E</span>if (!this.scene) {
// init() has not been called yet — queue for processing in init()
this.pendingConfigs.push(config);
return;
}
// Post-init registration: create group immediately
const group = <span class="cstat-no" title="statement not covered" >new Group();</span>
<span class="cstat-no" title="statement not covered" > group.renderOrder = config.renderOrder;</span>
<span class="cstat-no" title="statement not covered" > config.setup(group);</span>
<span class="cstat-no" title="statement not covered" > this.scene.add(group);</span>
<span class="cstat-no" title="statement not covered" > this.layers.set(config.id, { config, group });</span>
}
&nbsp;
unregister(id: string): void {
if (this._fallback) return;
const layer = this.layers.get(id);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!layer || !this.scene) <span class="cstat-no" title="statement not covered" >return;</span>
const scene = this.scene;
layer.config.dispose(layer.group);
scene.remove(layer.group);
this.layers.delete(id);
const anyVisible = [...this.layers.values()].some(<span class="fstat-no" title="function not covered" >(l</span>) =&gt; <span class="cstat-no" title="statement not covered" >l.group.visible)</span>;
<span class="missing-if-branch" title="else path not taken" >E</span>if (this.canvas &amp;&amp; !anyVisible) this.canvas.style.display = "none";
}
&nbsp;
setVisible(id: string, visible: boolean): void {
if (this._fallback) return;
const layer = this.layers.get(id);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!layer) <span class="cstat-no" title="statement not covered" >return;</span>
layer.group.visible = visible;
const anyVisible = [...this.layers.values()].some((l) =&gt; l.group.visible);
<span class="missing-if-branch" title="else path not taken" >E</span>if (this.canvas) this.canvas.style.display = anyVisible ? "block" : "none";
if (visible) this.requestRender();
}
&nbsp;
clearLayer(id: string): void {
if (this._fallback) return;
const layer = this.layers.get(id);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!layer) <span class="cstat-no" title="statement not covered" >return;</span>
layer.group.clear();
}
&nbsp;
requestRender(): void {
if (this._fallback) return;
if (this.rafId !== null) return;
this.rafId = requestAnimationFrame(() =&gt; {
this.rafId = null;
this.render();
});
}
&nbsp;
syncTransform(): void {
if (this._fallback || !this.camera) return;
const camera = this.camera;
const bounds = buildCameraBounds(
viewX,
viewY,
scale,
graphWidth,
graphHeight,
);
camera.left = bounds.left;
camera.right = bounds.right;
camera.top = bounds.top;
camera.bottom = bounds.bottom;
camera.updateProjectionMatrix();
}
&nbsp;
private subscribeD3Zoom(): void {
// viewbox is a D3 selection global available in the browser; guard for Node test env
<span class="missing-if-branch" title="else path not taken" >E</span>if (typeof (globalThis as any).viewbox === "undefined") return;
(<span class="cstat-no" title="statement not covered" >globalThis as any).viewbox.on("zoom.webgl", <span class="fstat-no" title="function not covered" >() =&gt; <span class="cstat-no" title="statement not covered" >t</span>his.requestRender())</span>;</span>
}
&nbsp;
private observeResize(): void {
<span class="missing-if-branch" title="if path not taken" >I</span>if (!this.container || !this.renderer) <span class="cstat-no" title="statement not covered" >return;</span>
this.resizeObserver = new ResizeObserver(<span class="fstat-no" title="function not covered" >(e</span>ntries) =&gt; {
const { width, height } = <span class="cstat-no" title="statement not covered" >entries[0].contentRect;</span>
<span class="cstat-no" title="statement not covered" > if (this.renderer &amp;&amp; this.canvas) {</span>
<span class="cstat-no" title="statement not covered" > this.renderer.setSize(width, height);</span>
<span class="cstat-no" title="statement not covered" > this.requestRender();</span>
}
});
this.resizeObserver.observe(this.container);
}
&nbsp;
private render(): void {
if (this._fallback || !this.renderer || !this.scene || !this.camera) return;
const renderer = this.renderer;
const scene = this.scene;
const camera = this.camera;
this.syncTransform();
for (const layer of this.layers.values()) {
if (layer.group.visible) {
layer.config.render(layer.group);
}
}
renderer.render(scene, camera);
}
}
&nbsp;
declare global {
var WebGL2LayerFramework: WebGL2LayerFrameworkClass;
}
globalThis.WebGL2LayerFramework = new WebGL2LayerFrameworkClass();
&nbsp;</pre></td></tr></table></pre>
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Code coverage generated by
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445
src/index.html
View file

@ -167,235 +167,238 @@
/>
</head>
<body>
<svg
id="map"
width="100%"
height="100%"
version="1.1"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
>
<defs>
<g id="filters">
<filter id="blurFilter" name="Blur 0.2" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="0.2" />
</filter>
<filter id="blur1" name="Blur 1" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="1" />
</filter>
<filter id="blur3" name="Blur 3" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="3" />
</filter>
<filter id="blur5" name="Blur 5" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="5" />
</filter>
<filter id="blur7" name="Blur 7" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="7" />
</filter>
<filter id="blur10" name="Blur 10" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="10" />
</filter>
<filter id="splotch" name="Splotch">
<feTurbulence type="fractalNoise" baseFrequency=".01" numOctaves="4" />
<feColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 -0.9 1.2" result="texture" />
<feComposite in="SourceGraphic" in2="texture" operator="in" />
</filter>
<filter id="bluredSplotch" name="Blurred Splotch">
<feTurbulence type="fractalNoise" baseFrequency=".01" numOctaves="4" />
<feColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 -0.9 1.2" result="texture" />
<feComposite in="SourceGraphic" in2="texture" operator="in" />
<feGaussianBlur stdDeviation="4" />
</filter>
<filter id="dropShadow" name="Shadow 2">
<feGaussianBlur in="SourceAlpha" stdDeviation="2" />
<feOffset dx="1" dy="2" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="dropShadow01" name="Shadow 0.1">
<feGaussianBlur in="SourceAlpha" stdDeviation=".1" />
<feOffset dx=".2" dy=".3" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="dropShadow05" name="Shadow 0.5">
<feGaussianBlur in="SourceAlpha" stdDeviation=".5" />
<feOffset dx=".5" dy=".7" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="outline" name="Outline">
<feGaussianBlur in="SourceAlpha" stdDeviation="1" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="pencil" name="Pencil">
<feTurbulence baseFrequency="0.03" numOctaves="6" type="fractalNoise" />
<feDisplacementMap scale="3" in="SourceGraphic" xChannelSelector="R" yChannelSelector="G" />
</filter>
<filter id="turbulence" name="Turbulence">
<feTurbulence baseFrequency="0.1" numOctaves="3" type="fractalNoise" />
<feDisplacementMap scale="10" in="SourceGraphic" xChannelSelector="R" yChannelSelector="G" />
</filter>
<div id="map-container" style="position: absolute; inset: 0">
<svg
id="map"
width="100%"
height="100%"
version="1.1"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:dc="http://purl.org/dc/elements/1.1/"
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
xmlns:svg="http://www.w3.org/2000/svg"
>
<defs>
<g id="filters">
<filter id="blurFilter" name="Blur 0.2" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="0.2" />
</filter>
<filter id="blur1" name="Blur 1" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="1" />
</filter>
<filter id="blur3" name="Blur 3" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="3" />
</filter>
<filter id="blur5" name="Blur 5" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="5" />
</filter>
<filter id="blur7" name="Blur 7" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="7" />
</filter>
<filter id="blur10" name="Blur 10" x="-1" y="-1" width="100" height="100">
<feGaussianBlur in="SourceGraphic" stdDeviation="10" />
</filter>
<filter id="splotch" name="Splotch">
<feTurbulence type="fractalNoise" baseFrequency=".01" numOctaves="4" />
<feColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 -0.9 1.2" result="texture" />
<feComposite in="SourceGraphic" in2="texture" operator="in" />
</filter>
<filter id="bluredSplotch" name="Blurred Splotch">
<feTurbulence type="fractalNoise" baseFrequency=".01" numOctaves="4" />
<feColorMatrix values="0 0 0 0 0, 0 0 0 0 0, 0 0 0 0 0, 0 0 0 -0.9 1.2" result="texture" />
<feComposite in="SourceGraphic" in2="texture" operator="in" />
<feGaussianBlur stdDeviation="4" />
</filter>
<filter id="dropShadow" name="Shadow 2">
<feGaussianBlur in="SourceAlpha" stdDeviation="2" />
<feOffset dx="1" dy="2" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="dropShadow01" name="Shadow 0.1">
<feGaussianBlur in="SourceAlpha" stdDeviation=".1" />
<feOffset dx=".2" dy=".3" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="dropShadow05" name="Shadow 0.5">
<feGaussianBlur in="SourceAlpha" stdDeviation=".5" />
<feOffset dx=".5" dy=".7" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="outline" name="Outline">
<feGaussianBlur in="SourceAlpha" stdDeviation="1" />
<feMerge>
<feMergeNode />
<feMergeNode in="SourceGraphic" />
</feMerge>
</filter>
<filter id="pencil" name="Pencil">
<feTurbulence baseFrequency="0.03" numOctaves="6" type="fractalNoise" />
<feDisplacementMap scale="3" in="SourceGraphic" xChannelSelector="R" yChannelSelector="G" />
</filter>
<filter id="turbulence" name="Turbulence">
<feTurbulence baseFrequency="0.1" numOctaves="3" type="fractalNoise" />
<feDisplacementMap scale="10" in="SourceGraphic" xChannelSelector="R" yChannelSelector="G" />
</filter>
<filter
id="paper"
name="Paper"
x="-20%"
y="-20%"
width="140%"
height="140%"
filterUnits="objectBoundingBox"
primitiveUnits="userSpaceOnUse"
color-interpolation-filters="sRGB"
>
<feGaussianBlur
stdDeviation="1 1"
x="0%"
y="0%"
width="100%"
height="100%"
in="SourceGraphic"
edgeMode="none"
result="blur"
/>
<feTurbulence
type="fractalNoise"
baseFrequency="0.05 0.05"
numOctaves="4"
seed="1"
stitchTiles="stitch"
result="turbulence"
/>
<feDiffuseLighting
surfaceScale="2"
diffuseConstant="1"
lighting-color="#707070"
in="turbulence"
result="diffuseLighting"
<filter
id="paper"
name="Paper"
x="-20%"
y="-20%"
width="140%"
height="140%"
filterUnits="objectBoundingBox"
primitiveUnits="userSpaceOnUse"
color-interpolation-filters="sRGB"
>
<feDistantLight azimuth="45" elevation="20" />
</feDiffuseLighting>
<feComposite in="diffuseLighting" in2="blur" operator="lighter" result="composite" />
<feComposite
in="composite"
in2="SourceGraphic"
operator="in"
x="0%"
y="0%"
width="100%"
height="100%"
result="composite1"
/>
</filter>
<feGaussianBlur
stdDeviation="1 1"
x="0%"
y="0%"
width="100%"
height="100%"
in="SourceGraphic"
edgeMode="none"
result="blur"
/>
<feTurbulence
type="fractalNoise"
baseFrequency="0.05 0.05"
numOctaves="4"
seed="1"
stitchTiles="stitch"
result="turbulence"
/>
<feDiffuseLighting
surfaceScale="2"
diffuseConstant="1"
lighting-color="#707070"
in="turbulence"
result="diffuseLighting"
>
<feDistantLight azimuth="45" elevation="20" />
</feDiffuseLighting>
<feComposite in="diffuseLighting" in2="blur" operator="lighter" result="composite" />
<feComposite
in="composite"
in2="SourceGraphic"
operator="in"
x="0%"
y="0%"
width="100%"
height="100%"
result="composite1"
/>
</filter>
<filter
id="crumpled"
name="Crumpled"
x="-20%"
y="-20%"
width="140%"
height="140%"
filterUnits="objectBoundingBox"
primitiveUnits="userSpaceOnUse"
color-interpolation-filters="sRGB"
>
<feGaussianBlur
stdDeviation="2 2"
x="0%"
y="0%"
width="100%"
height="100%"
in="SourceGraphic"
edgeMode="none"
result="blur"
/>
<feTurbulence
type="turbulence"
baseFrequency="0.05 0.05"
numOctaves="4"
seed="1"
stitchTiles="stitch"
result="turbulence"
/>
<feDiffuseLighting
surfaceScale="2"
diffuseConstant="1"
lighting-color="#828282"
in="turbulence"
result="diffuseLighting"
<filter
id="crumpled"
name="Crumpled"
x="-20%"
y="-20%"
width="140%"
height="140%"
filterUnits="objectBoundingBox"
primitiveUnits="userSpaceOnUse"
color-interpolation-filters="sRGB"
>
<feDistantLight azimuth="320" elevation="10" />
</feDiffuseLighting>
<feComposite in="diffuseLighting" in2="blur" operator="lighter" result="composite" />
<feComposite
in="composite"
in2="SourceGraphic"
operator="in"
x="0%"
y="0%"
width="100%"
height="100%"
result="composite1"
/>
</filter>
<feGaussianBlur
stdDeviation="2 2"
x="0%"
y="0%"
width="100%"
height="100%"
in="SourceGraphic"
edgeMode="none"
result="blur"
/>
<feTurbulence
type="turbulence"
baseFrequency="0.05 0.05"
numOctaves="4"
seed="1"
stitchTiles="stitch"
result="turbulence"
/>
<feDiffuseLighting
surfaceScale="2"
diffuseConstant="1"
lighting-color="#828282"
in="turbulence"
result="diffuseLighting"
>
<feDistantLight azimuth="320" elevation="10" />
</feDiffuseLighting>
<feComposite in="diffuseLighting" in2="blur" operator="lighter" result="composite" />
<feComposite
in="composite"
in2="SourceGraphic"
operator="in"
x="0%"
y="0%"
width="100%"
height="100%"
result="composite1"
/>
</filter>
<filter id="filter-grayscale" name="Grayscale">
<feColorMatrix
values="0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0"
/>
</filter>
<filter id="filter-sepia" name="Sepia">
<feColorMatrix values="0.393 0.769 0.189 0 0 0.349 0.686 0.168 0 0 0.272 0.534 0.131 0 0 0 0 0 1 0" />
</filter>
<filter id="filter-dingy" name="Dingy">
<feColorMatrix values="1 0 0 0 0 0 1 0 0 0 0 0.3 0.3 0 0 0 0 0 1 0"></feColorMatrix>
</filter>
<filter id="filter-tint" name="Tint">
<feColorMatrix values="1.1 0 0 0 0 0 1.1 0 0 0 0 0 0.9 0 0 0 0 0 1 0"></feColorMatrix>
</filter>
</g>
<filter id="filter-grayscale" name="Grayscale">
<feColorMatrix
values="0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0"
/>
</filter>
<filter id="filter-sepia" name="Sepia">
<feColorMatrix values="0.393 0.769 0.189 0 0 0.349 0.686 0.168 0 0 0.272 0.534 0.131 0 0 0 0 0 1 0" />
</filter>
<filter id="filter-dingy" name="Dingy">
<feColorMatrix values="1 0 0 0 0 0 1 0 0 0 0 0.3 0.3 0 0 0 0 0 1 0"></feColorMatrix>
</filter>
<filter id="filter-tint" name="Tint">
<feColorMatrix values="1.1 0 0 0 0 0 1.1 0 0 0 0 0 0.9 0 0 0 0 0 1 0"></feColorMatrix>
</filter>
</g>
<g id="deftemp">
<g id="featurePaths"></g>
<g id="textPaths"></g>
<g id="statePaths"></g>
<g id="defs-emblems"></g>
<mask id="land"></mask>
<mask id="water"></mask>
<mask id="fog" style="stroke-width: 10; stroke: black; stroke-linejoin: round; stroke-opacity: 0.1">
<rect x="0" y="0" width="100%" height="100%" fill="white" stroke="none" />
<g id="deftemp">
<g id="featurePaths"></g>
<g id="textPaths"></g>
<g id="statePaths"></g>
<g id="defs-emblems"></g>
<mask id="land"></mask>
<mask id="water"></mask>
<mask id="fog" style="stroke-width: 10; stroke: black; stroke-linejoin: round; stroke-opacity: 0.1">
<rect x="0" y="0" width="100%" height="100%" fill="white" stroke="none" />
</mask>
</g>
<pattern id="oceanic" width="100" height="100" patternUnits="userSpaceOnUse">
<image id="oceanicPattern" href="./images/pattern1.png" opacity="0.2"></image>
</pattern>
<mask id="vignette-mask">
<rect x="0" y="0" width="100%" height="100%" fill="white"></rect>
<rect id="vignette-rect" fill="black"></rect>
</mask>
</defs>
<g id="viewbox"></g>
<g id="scaleBar">
<rect id="scaleBarBack"></rect>
</g>
<pattern id="oceanic" width="100" height="100" patternUnits="userSpaceOnUse">
<image id="oceanicPattern" href="./images/pattern1.png" opacity="0.2"></image>
</pattern>
<mask id="vignette-mask">
<rect x="0" y="0" width="100%" height="100%" fill="white"></rect>
<rect id="vignette-rect" fill="black"></rect>
</mask>
</defs>
<g id="viewbox"></g>
<g id="scaleBar">
<rect id="scaleBarBack"></rect>
</g>
<g id="vignette" mask="url(#vignette-mask)">
<rect x="0" y="0" width="100%" height="100%" />
</g>
</svg>
<g id="vignette" mask="url(#vignette-mask)">
<rect x="0" y="0" width="100%" height="100%" />
</g>
</svg>
<canvas id="webgl-canvas" aria-hidden style="position: absolute; inset: 0; pointer-events: none"></canvas>
</div>
<div id="loading">
<svg width="100%" height="100%">

2
src/modules/index.ts
View file

@ -18,5 +18,5 @@ import "./river-generator";
import "./routes-generator";
import "./states-generator";
import "./voronoi";
import "./webgl-layer-framework";
import "./webgl-layer";
import "./zones-generator";

633
src/modules/webgl-layer-framework.test.ts
View file

@ -1,633 +0,0 @@
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import {
buildCameraBounds,
detectWebGL2,
getLayerZIndex,
WebGL2LayerFrameworkClass,
} from "./webgl-layer-framework";
// Three.js constructors are mocked so that Node-env init() tests work without
// a real WebGL context. These stubs only affect class-level tests that call
// init(); Story 1.1 pure-function tests never invoke Three.js constructors.
vi.mock("three", () => {
// Must use regular `function` (not arrow) so vi.fn() can be called with `new`.
const Group = vi.fn().mockImplementation(function (this: any) {
this.renderOrder = 0;
this.visible = true;
this.clear = vi.fn();
});
const WebGLRenderer = vi.fn().mockImplementation(function (this: any) {
this.setSize = vi.fn();
this.render = vi.fn();
});
const Scene = vi.fn().mockImplementation(function (this: any) {
this.add = vi.fn();
});
const OrthographicCamera = vi.fn().mockImplementation(function (this: any) {
this.left = 0;
this.right = 960;
this.top = 0;
this.bottom = 540;
});
return { Group, WebGLRenderer, Scene, OrthographicCamera };
});
// ─── buildCameraBounds ───────────────────────────────────────────────────────
describe("buildCameraBounds", () => {
it("returns correct bounds for identity transform (viewX=0, viewY=0, scale=1)", () => {
const b = buildCameraBounds(0, 0, 1, 960, 540);
expect(b.left).toBe(0);
expect(b.right).toBe(960);
expect(b.top).toBe(0);
expect(b.bottom).toBe(540);
});
it("top < bottom (Y-down convention matches SVG coordinate space)", () => {
const b = buildCameraBounds(0, 0, 1, 960, 540);
expect(b.top).toBeLessThan(b.bottom);
});
it("returns correct bounds at 2× zoom (viewport shows half the map area)", () => {
const b = buildCameraBounds(0, 0, 2, 960, 540);
expect(b.right).toBe(480);
expect(b.bottom).toBe(270);
});
it("returns correct bounds with pan offset — viewX=-100 pans right, viewY=-50 pans down", () => {
const b = buildCameraBounds(-100, -50, 1, 960, 540);
expect(b.left).toBe(100); // -(-100) / 1
expect(b.right).toBe(1060); // (960 - (-100)) / 1
expect(b.top).toBe(50); // -(-50) / 1
});
it("handles extreme zoom values without NaN or Infinity", () => {
const lo = buildCameraBounds(0, 0, 0.1, 960, 540);
const hi = buildCameraBounds(0, 0, 50, 960, 540);
expect(Number.isFinite(lo.left)).toBe(true);
expect(Number.isFinite(lo.right)).toBe(true);
expect(Number.isFinite(lo.top)).toBe(true);
expect(Number.isFinite(lo.bottom)).toBe(true);
expect(Number.isFinite(hi.left)).toBe(true);
expect(Number.isFinite(hi.right)).toBe(true);
expect(Number.isFinite(hi.top)).toBe(true);
expect(Number.isFinite(hi.bottom)).toBe(true);
});
});
// ─── detectWebGL2 ─────────────────────────────────────────────────────────────
describe("detectWebGL2", () => {
it("returns false when canvas.getContext('webgl2') returns null", () => {
const mockCanvas = {
getContext: () => null,
} as unknown as HTMLCanvasElement;
expect(detectWebGL2(mockCanvas)).toBe(false);
});
it("returns true when canvas.getContext('webgl2') returns a context object", () => {
const mockCtx = { getExtension: () => null };
const mockCanvas = {
getContext: () => mockCtx,
} as unknown as HTMLCanvasElement;
expect(detectWebGL2(mockCanvas)).toBe(true);
});
it("calls loseContext() on the WEBGL_lose_context extension to release probe context", () => {
const loseContext = vi.fn();
const mockExt = { loseContext };
const mockCtx = { getExtension: () => mockExt };
const mockCanvas = {
getContext: () => mockCtx,
} as unknown as HTMLCanvasElement;
detectWebGL2(mockCanvas);
expect(loseContext).toHaveBeenCalledOnce();
});
});
// ─── getLayerZIndex ───────────────────────────────────────────────────────────
describe("getLayerZIndex", () => {
it("returns fallback z-index 2 when element is not found in the DOM", () => {
// In Node.js test environment, document is undefined → fallback 2.
// In jsdom environment, getElementById("nonexistent") returns null → also fallback 2.
expect(getLayerZIndex("nonexistent-layer-id")).toBe(2);
});
});
// ─── WebGL2LayerFrameworkClass ────────────────────────────────────────────────
describe("WebGL2LayerFrameworkClass", () => {
let framework: WebGL2LayerFrameworkClass;
beforeEach(() => {
framework = new WebGL2LayerFrameworkClass();
});
it("hasFallback is false by default (backing field _fallback initialised to false)", () => {
expect(framework.hasFallback).toBe(false);
});
it("register() before init() queues the config in pendingConfigs", () => {
const config = {
id: "test",
anchorLayerId: "terrain",
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
};
framework.register(config);
expect((framework as any).pendingConfigs).toHaveLength(1);
expect((framework as any).pendingConfigs[0]).toBe(config);
});
it("register() queues multiple configs without throwing", () => {
const makeConfig = (id: string) => ({
id,
anchorLayerId: id,
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
});
framework.register(makeConfig("a"));
framework.register(makeConfig("b"));
expect((framework as any).pendingConfigs).toHaveLength(2);
});
it("setVisible() does not call config.dispose() (GPU state preserved, NFR-P6)", () => {
const config = {
id: "terrain",
anchorLayerId: "terrain",
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
};
(framework as any).layers.set("terrain", {
config,
group: { visible: true },
});
(framework as any).canvas = { style: { display: "block" } };
framework.setVisible("terrain", false);
expect(config.dispose).not.toHaveBeenCalled();
});
it("requestRender() does not throw when called multiple times", () => {
vi.stubGlobal("requestAnimationFrame", vi.fn().mockReturnValue(0));
expect(() => {
framework.requestRender();
framework.requestRender();
framework.requestRender();
}).not.toThrow();
vi.unstubAllGlobals();
});
it("clearLayer() does not throw and preserves layer registration in the Map", () => {
const config = {
id: "terrain",
anchorLayerId: "terrain",
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
};
(framework as any).layers.set("terrain", {
config,
group: { visible: true, clear: vi.fn() },
});
framework.clearLayer("terrain");
// Layer registration remains in the Map — only geometry is wiped in the full implementation
expect((framework as any).layers.has("terrain")).toBe(true);
});
it("constructor performs no side effects — all state fields initialised to null/empty", () => {
expect((framework as any).renderer).toBeNull();
expect((framework as any).scene).toBeNull();
expect((framework as any).camera).toBeNull();
expect((framework as any).canvas).toBeNull();
expect((framework as any).container).toBeNull();
expect((framework as any).resizeObserver).toBeNull();
expect((framework as any).rafId).toBeNull();
expect((framework as any).layers.size).toBe(0);
expect((framework as any).pendingConfigs).toHaveLength(0);
});
});
// ─── WebGL2LayerFrameworkClass — init() (Story 1.2) ──────────────────────────
describe("WebGL2LayerFrameworkClass — init()", () => {
let framework: WebGL2LayerFrameworkClass;
// Build a minimal document stub. The canvas mock satisfies both detectWebGL2()
// (probe getContext call) and the DOM canvas element requirements (id/style/etc.).
function buildDocumentMock({ webgl2 = true }: { webgl2?: boolean } = {}) {
const mockCtx = webgl2
? { getExtension: () => ({ loseContext: vi.fn() }) }
: null;
const mockCanvas = {
getContext: (type: string) => (type === "webgl2" ? mockCtx : null),
id: "",
width: 0,
height: 0,
style: { position: "", inset: "", pointerEvents: "", zIndex: "" },
setAttribute: vi.fn(),
};
const mockContainer = {
id: "",
style: { position: "", zIndex: "" },
appendChild: vi.fn(),
clientWidth: 960,
clientHeight: 540,
};
const mockMapEl = {
parentElement: { insertBefore: vi.fn() },
};
return {
createElement: vi.fn((tag: string) =>
tag === "canvas" ? mockCanvas : mockContainer,
),
getElementById: vi.fn((id: string) => (id === "map" ? mockMapEl : null)),
_mocks: { mockCanvas, mockContainer, mockMapEl },
};
}
beforeEach(() => {
framework = new WebGL2LayerFrameworkClass();
// ResizeObserver is not available in Node; stub it so observeResize() doesn't throw.
vi.stubGlobal(
"ResizeObserver",
vi.fn().mockImplementation(function (this: any) {
this.observe = vi.fn();
this.disconnect = vi.fn();
}),
);
});
afterEach(() => {
vi.unstubAllGlobals();
});
it("returns false and sets hasFallback when WebGL2 is unavailable (AC2)", () => {
vi.stubGlobal("document", buildDocumentMock({ webgl2: false }));
const result = framework.init();
expect(result).toBe(false);
expect(framework.hasFallback).toBe(true);
});
it("returns false when #map element is missing — renderer remains null (AC2 guard)", () => {
const doc = buildDocumentMock({ webgl2: true });
doc.getElementById = vi.fn(() => null);
vi.stubGlobal("document", doc);
const result = framework.init();
expect(result).toBe(false);
expect((framework as any).renderer).toBeNull();
});
it("returns true and assigns renderer, scene, camera, canvas on success (AC4)", () => {
vi.stubGlobal("document", buildDocumentMock({ webgl2: true }));
const result = framework.init();
expect(result).toBe(true);
expect((framework as any).renderer).not.toBeNull();
expect((framework as any).scene).not.toBeNull();
expect((framework as any).camera).not.toBeNull();
expect((framework as any).canvas).not.toBeNull();
});
it("processes pendingConfigs on init() — setup() called once, layer stored, queue flushed", () => {
vi.stubGlobal("document", buildDocumentMock({ webgl2: true }));
const config = {
id: "terrain",
anchorLayerId: "terrain",
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
};
framework.register(config);
expect((framework as any).pendingConfigs).toHaveLength(1);
framework.init();
expect(config.setup).toHaveBeenCalledOnce();
expect((framework as any).layers.has("terrain")).toBe(true);
expect((framework as any).pendingConfigs).toHaveLength(0);
});
it("attaches ResizeObserver to container on success (AC5)", () => {
vi.stubGlobal("document", buildDocumentMock({ webgl2: true }));
framework.init();
expect((framework as any).resizeObserver).not.toBeNull();
});
});
// ─── WebGL2LayerFrameworkClass — lifecycle & render loop (Story 1.3) ───────────
describe("WebGL2LayerFrameworkClass — lifecycle & render loop (Story 1.3)", () => {
let framework: WebGL2LayerFrameworkClass;
const makeConfig = (id = "terrain") => ({
id,
anchorLayerId: id,
renderOrder: 1,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
});
beforeEach(() => {
framework = new WebGL2LayerFrameworkClass();
vi.stubGlobal("requestAnimationFrame", vi.fn().mockReturnValue(42));
});
afterEach(() => {
vi.restoreAllMocks();
vi.unstubAllGlobals();
});
// ── requestRender() / RAF coalescing ──────────────────────────────────────
it("requestRender() schedules exactly one RAF for three rapid calls (AC6)", () => {
framework.requestRender();
framework.requestRender();
framework.requestRender();
expect((globalThis as any).requestAnimationFrame).toHaveBeenCalledTimes(1);
});
it("requestRender() resets rafId to null after the frame callback executes (AC6)", () => {
let storedCallback: (() => void) | null = null;
vi.stubGlobal(
"requestAnimationFrame",
vi.fn().mockImplementation((cb: () => void) => {
storedCallback = cb;
return 42;
}),
);
framework.requestRender();
expect((framework as any).rafId).not.toBeNull();
storedCallback!();
expect((framework as any).rafId).toBeNull();
});
// ── syncTransform() ───────────────────────────────────────────────────────
it("syncTransform() applies buildCameraBounds(0,0,1,960,540) to camera (AC8)", () => {
const mockCamera = {
left: 0,
right: 0,
top: 0,
bottom: 0,
updateProjectionMatrix: vi.fn(),
};
(framework as any).camera = mockCamera;
vi.stubGlobal("viewX", 0);
vi.stubGlobal("viewY", 0);
vi.stubGlobal("scale", 1);
vi.stubGlobal("graphWidth", 960);
vi.stubGlobal("graphHeight", 540);
framework.syncTransform();
const expected = buildCameraBounds(0, 0, 1, 960, 540);
expect(mockCamera.left).toBe(expected.left);
expect(mockCamera.right).toBe(expected.right);
expect(mockCamera.top).toBe(expected.top);
expect(mockCamera.bottom).toBe(expected.bottom);
expect(mockCamera.updateProjectionMatrix).toHaveBeenCalledOnce();
});
it("syncTransform() uses ?? defaults when globals are absent (AC8)", () => {
const mockCamera = {
left: 99,
right: 99,
top: 99,
bottom: 99,
updateProjectionMatrix: vi.fn(),
};
(framework as any).camera = mockCamera;
// No globals stubbed — ?? fallbacks (0, 0, 1, 960, 540) take effect
framework.syncTransform();
const expected = buildCameraBounds(0, 0, 1, 960, 540);
expect(mockCamera.left).toBe(expected.left);
expect(mockCamera.right).toBe(expected.right);
});
// ── render() — dispatch order ─────────────────────────────────────────────
it("render() calls syncTransform, then per-layer render, then renderer.render in order (AC7)", () => {
const order: string[] = [];
const layerRenderFn = vi.fn(() => order.push("layer.render"));
const mockRenderer = { render: vi.fn(() => order.push("renderer.render")) };
const mockCamera = {
left: 0,
right: 0,
top: 0,
bottom: 0,
updateProjectionMatrix: vi.fn(),
};
(framework as any).renderer = mockRenderer;
(framework as any).scene = {};
(framework as any).camera = mockCamera;
(framework as any).layers.set("terrain", {
config: { ...makeConfig(), render: layerRenderFn },
group: { visible: true },
});
const syncSpy = vi
.spyOn(framework as any, "syncTransform")
.mockImplementation(() => order.push("syncTransform"));
vi.stubGlobal(
"requestAnimationFrame",
vi.fn().mockImplementation((cb: () => void) => {
cb();
return 1;
}),
);
framework.requestRender();
expect(order).toEqual(["syncTransform", "layer.render", "renderer.render"]);
syncSpy.mockRestore();
});
it("render() skips invisible layers — config.render not called (AC7)", () => {
const invisibleRenderFn = vi.fn();
const mockRenderer = { render: vi.fn() };
(framework as any).renderer = mockRenderer;
(framework as any).scene = {};
(framework as any).camera = {
left: 0,
right: 0,
top: 0,
bottom: 0,
updateProjectionMatrix: vi.fn(),
};
(framework as any).layers.set("terrain", {
config: { ...makeConfig(), render: invisibleRenderFn },
group: { visible: false },
});
vi.stubGlobal(
"requestAnimationFrame",
vi.fn().mockImplementation((cb: () => void) => {
cb();
return 1;
}),
);
framework.requestRender();
expect(invisibleRenderFn).not.toHaveBeenCalled();
});
// ── setVisible() ──────────────────────────────────────────────────────────
it("setVisible(false) sets group.visible=false without calling dispose (AC3, NFR-P6)", () => {
const config = makeConfig();
const group = { visible: true };
(framework as any).layers.set("terrain", { config, group });
(framework as any).canvas = { style: { display: "block" } };
framework.setVisible("terrain", false);
expect(group.visible).toBe(false);
expect(config.dispose).not.toHaveBeenCalled();
});
it("setVisible(false) hides canvas when all layers become invisible (AC3)", () => {
const canvas = { style: { display: "block" } };
(framework as any).canvas = canvas;
(framework as any).layers.set("terrain", {
config: makeConfig(),
group: { visible: true },
});
(framework as any).layers.set("rivers", {
config: makeConfig("rivers"),
group: { visible: false },
});
framework.setVisible("terrain", false);
expect(canvas.style.display).toBe("none");
});
it("setVisible(true) calls requestRender() (AC4)", () => {
const group = { visible: false };
(framework as any).layers.set("terrain", { config: makeConfig(), group });
(framework as any).canvas = { style: { display: "none" } };
const renderSpy = vi.spyOn(framework, "requestRender");
framework.setVisible("terrain", true);
expect(group.visible).toBe(true);
expect(renderSpy).toHaveBeenCalledOnce();
});
// ── clearLayer() ──────────────────────────────────────────────────────────
it("clearLayer() calls group.clear() and preserves layer in the Map (AC5)", () => {
const clearFn = vi.fn();
(framework as any).layers.set("terrain", {
config: makeConfig(),
group: { visible: true, clear: clearFn },
});
framework.clearLayer("terrain");
expect(clearFn).toHaveBeenCalledOnce();
expect((framework as any).layers.has("terrain")).toBe(true);
});
it("clearLayer() does not call renderer.dispose (AC5, NFR-P6)", () => {
const mockRenderer = { render: vi.fn(), dispose: vi.fn() };
(framework as any).renderer = mockRenderer;
(framework as any).layers.set("terrain", {
config: makeConfig(),
group: { visible: true, clear: vi.fn() },
});
framework.clearLayer("terrain");
expect(mockRenderer.dispose).not.toHaveBeenCalled();
});
// ── unregister() ──────────────────────────────────────────────────────────
it("unregister() calls dispose, removes from scene and Map (AC9)", () => {
const config = makeConfig();
const group = { visible: true };
const mockScene = { remove: vi.fn() };
(framework as any).scene = mockScene;
(framework as any).canvas = { style: { display: "block" } };
(framework as any).layers.set("terrain", { config, group });
framework.unregister("terrain");
expect(config.dispose).toHaveBeenCalledWith(group);
expect(mockScene.remove).toHaveBeenCalledWith(group);
expect((framework as any).layers.has("terrain")).toBe(false);
});
it("unregister() hides canvas when it was the last registered layer (AC9)", () => {
const canvas = { style: { display: "block" } };
(framework as any).canvas = canvas;
(framework as any).scene = { remove: vi.fn() };
(framework as any).layers.set("terrain", {
config: makeConfig(),
group: { visible: true },
});
framework.unregister("terrain");
expect(canvas.style.display).toBe("none");
});
});
// ─── WebGL2LayerFramework fallback no-op path (Story 2.3) ───────────────────
describe("WebGL2LayerFramework — fallback no-op path (Story 2.3)", () => {
let framework: WebGL2LayerFrameworkClass;
const makeConfig = () => ({
id: "terrain",
anchorLayerId: "terrain",
renderOrder: 2,
setup: vi.fn(),
render: vi.fn(),
dispose: vi.fn(),
});
beforeEach(() => {
framework = new WebGL2LayerFrameworkClass();
(framework as any)._fallback = true;
});
it("hasFallback getter returns true when _fallback is set", () => {
expect(framework.hasFallback).toBe(true);
});
it("register() queues config but does not call setup() when fallback is active", () => {
// When _fallback=true, scene is null (init() exits early without creating scene).
// register() therefore queues into pendingConfigs[] — setup() is never called.
const config = makeConfig();
expect(() => framework.register(config)).not.toThrow();
expect(config.setup).not.toHaveBeenCalled();
});
it("setVisible() is a no-op when fallback is active — no exception for false", () => {
expect(() => framework.setVisible("terrain", false)).not.toThrow();
});
it("setVisible() is a no-op when fallback is active — no exception for true", () => {
expect(() => framework.setVisible("terrain", true)).not.toThrow();
});
it("clearLayer() is a no-op when fallback is active", () => {
expect(() => framework.clearLayer("terrain")).not.toThrow();
});
it("requestRender() is a no-op when fallback is active — RAF not scheduled", () => {
const rafMock = vi.fn().mockReturnValue(1);
vi.stubGlobal("requestAnimationFrame", rafMock);
expect(() => framework.requestRender()).not.toThrow();
expect(rafMock).not.toHaveBeenCalled();
vi.unstubAllGlobals();
});
it("unregister() is a no-op when fallback is active", () => {
expect(() => framework.unregister("terrain")).not.toThrow();
});
it("syncTransform() is a no-op when fallback is active", () => {
expect(() => framework.syncTransform()).not.toThrow();
});
it("NFR-C1: no console.error emitted during fallback operations", () => {
const errorSpy = vi.spyOn(console, "error");
framework.register(makeConfig());
framework.setVisible("terrain", false);
framework.clearLayer("terrain");
framework.requestRender();
framework.unregister("terrain");
framework.syncTransform();
expect(errorSpy).not.toHaveBeenCalled();
vi.restoreAllMocks();
});
});

241
src/modules/webgl-layer-framework.ts
View file

@ -1,241 +0,0 @@
import { Group, OrthographicCamera, Scene, WebGLRenderer } from "three";
/**
* Converts a D3 zoom transform into orthographic camera bounds.
*
* D3 applies: screen = map * scale + (viewX, viewY)
* Inverting: map = (screen - (viewX, viewY)) / scale
*
* Orthographic bounds (visible map region at current zoom/pan):
* left = -viewX / scale
* right = (graphWidth - viewX) / scale
* top = -viewY / scale
* bottom = (graphHeight - viewY) / scale
*
* top < bottom: Y-down matches SVG; origin at top-left of map.
* Do NOT swap top/bottom or negate — this is correct Three.js Y-down config.
*/
export function buildCameraBounds(
viewX: number,
viewY: number,
scale: number,
graphWidth: number,
graphHeight: number,
): { left: number; right: number; top: number; bottom: number } {
return {
left: (0 - viewX) / scale,
right: (graphWidth - viewX) / scale,
top: (0 - viewY) / scale,
bottom: (graphHeight - viewY) / scale,
};
}
/**
* Detects WebGL2 support by probing canvas.getContext("webgl2").
* Accepts an optional injectable probe canvas for testability (avoids DOM access in tests).
* Immediately releases the probed context via WEBGL_lose_context if available.
*/
export function detectWebGL2(probe?: HTMLCanvasElement): boolean {
const canvas = probe ?? document.createElement("canvas");
const ctx = canvas.getContext("webgl2");
if (!ctx) return false;
const ext = ctx.getExtension("WEBGL_lose_context");
ext?.loseContext();
return true;
}
/**
* Returns the CSS z-index for a canvas layer anchored to the given SVG element id.
* Phase 2 forward-compatible: derives index from DOM sibling position (+1 offset).
* Falls back to 2 (above #map SVG at z-index 1) when element is absent or document
* is unavailable (e.g. Node.js test environment).
*
* MVP note: #terrain is a <g> inside <svg#map>, not a sibling of #map-container,
* so this always resolves to the fallback 2 in MVP. Phase 2 (DOM-split) will give
* true per-layer interleaving values automatically.
*/
export function getLayerZIndex(anchorLayerId: string): number {
if (typeof document === "undefined") return 2;
const anchor = document.getElementById(anchorLayerId);
if (!anchor) return 2;
const siblings = Array.from(anchor.parentElement?.children ?? []);
const idx = siblings.indexOf(anchor);
// +1 so Phase 2 callers get a correct interleaving value automatically
return idx > 0 ? idx + 1 : 2;
}
// ─── Interfaces ──────────────────────────────────────────────────────────────
export interface WebGLLayerConfig {
id: string;
anchorLayerId: string; // SVG <g> id; canvas id derived as `${id}Canvas`
renderOrder: number; // Three.js renderOrder for this layer's Group
setup: (group: Group) => void; // called once after WebGL2 confirmed; add meshes to group
render: (group: Group) => void; // called each frame before renderer.render(); update uniforms/geometry
dispose: (group: Group) => void; // called on unregister(); dispose all GPU objects in group
}
// Not exported — internal framework bookkeeping only
interface RegisteredLayer {
config: WebGLLayerConfig;
group: Group; // framework-owned; passed to all callbacks — abstraction boundary
}
export class WebGL2LayerFrameworkClass {
private canvas: HTMLCanvasElement | null = null;
private renderer: WebGLRenderer | null = null;
private camera: OrthographicCamera | null = null;
private scene: Scene | null = null;
private layers: Map<string, RegisteredLayer> = new Map();
private pendingConfigs: WebGLLayerConfig[] = []; // queue for register() before init()
private resizeObserver: ResizeObserver | null = null;
private rafId: number | null = null;
private container: HTMLElement | null = null;
init(): boolean {
const mapEl = document.getElementById("map");
if (!mapEl) throw new Error("Map element not found");
const container = document.createElement("div");
container.id = "map-container";
container.style.position = "relative";
mapEl.parentElement!.insertBefore(container, mapEl);
container.appendChild(mapEl);
this.container = container;
const canvas = document.createElement("canvas");
canvas.id = "terrainCanvas";
canvas.style.position = "absolute";
canvas.style.inset = "0";
canvas.style.pointerEvents = "none";
canvas.setAttribute("aria-hidden", "true");
canvas.style.zIndex = String(getLayerZIndex("terrain"));
canvas.width = mapEl.clientWidth || 960;
canvas.height = mapEl.clientHeight || 540;
container.appendChild(canvas);
this.canvas = canvas;
this.renderer = new WebGLRenderer({
canvas,
antialias: true,
alpha: true,
});
this.renderer.setPixelRatio(window.devicePixelRatio);
this.renderer.setSize(canvas.width, canvas.height, false);
this.scene = new Scene();
this.camera = new OrthographicCamera(0, graphWidth, 0, graphHeight, -1, 1);
this.subscribeD3Zoom();
// Process pre-init registrations (register() before init() is explicitly safe)
for (const config of this.pendingConfigs) {
const group = new Group();
group.renderOrder = config.renderOrder;
config.setup(group);
this.scene.add(group);
this.layers.set(config.id, { config, group });
}
this.pendingConfigs = [];
this.observeResize();
return true;
}
register(config: WebGLLayerConfig): void {
if (!this.scene) {
// init() has not been called yet — queue for processing in init()
this.pendingConfigs.push(config);
return;
}
// Post-init registration: create group immediately
const group = new Group();
group.renderOrder = config.renderOrder;
config.setup(group);
this.scene.add(group);
this.layers.set(config.id, { config, group });
}
unregister(id: string): void {
const layer = this.layers.get(id);
if (!layer || !this.scene) return;
const scene = this.scene;
layer.config.dispose(layer.group);
scene.remove(layer.group);
this.layers.delete(id);
const anyVisible = [...this.layers.values()].some((l) => l.group.visible);
if (this.canvas && !anyVisible) this.canvas.style.display = "none";
}
setVisible(id: string, visible: boolean): void {
const layer = this.layers.get(id);
if (!layer) return;
layer.group.visible = visible;
const anyVisible = [...this.layers.values()].some((l) => l.group.visible);
if (this.canvas) this.canvas.style.display = anyVisible ? "block" : "none";
if (visible) this.requestRender();
}
clearLayer(id: string): void {
const layer = this.layers.get(id);
if (!layer) return;
layer.group.clear();
this.requestRender();
}
requestRender(): void {
if (this.rafId !== null) return;
this.rafId = requestAnimationFrame(() => {
this.rafId = null;
this.render();
});
}
syncTransform(): void {
if (!this.camera) return;
const bounds = buildCameraBounds(
viewX,
viewY,
scale,
graphWidth,
graphHeight,
);
this.camera.left = bounds.left;
this.camera.right = bounds.right;
this.camera.top = bounds.top;
this.camera.bottom = bounds.bottom;
this.camera.updateProjectionMatrix();
}
private subscribeD3Zoom(): void {
viewbox.on("zoom.webgl", () => this.requestRender());
}
private observeResize(): void {
if (!this.container || !this.renderer) return;
const mapEl = this.container.querySelector("#map") ?? this.container;
this.resizeObserver = new ResizeObserver((entries) => {
const { width, height } = entries[0].contentRect;
if (this.renderer && this.canvas && width > 0 && height > 0) {
// updateStyle=false — CSS inset:0 handles canvas positioning.
this.renderer.setSize(width, height, false);
this.requestRender();
}
});
this.resizeObserver.observe(mapEl);
}
private render(): void {
if (!this.renderer || !this.scene || !this.camera) return;
this.syncTransform();
for (const layer of this.layers.values()) {
if (layer.group.visible) layer.config.render(layer.group);
}
this.renderer.render(this.scene, this.camera);
}
}
declare global {
var WebGL2LayerFramework: WebGL2LayerFrameworkClass;
}
window.WebGL2LayerFramework = new WebGL2LayerFrameworkClass();

148
src/modules/webgl-layer.ts Normal file
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@ -0,0 +1,148 @@
import { Group, OrthographicCamera, Scene, WebGLRenderer } from "three";
import { byId } from "../utils";
export interface WebGLLayerConfig {
id: string;
setup: (group: Group) => void; // called once after WebGL2 confirmed; add meshes to group
render: (group: Group) => void; // called each frame before renderer.render(); update uniforms/geometry
dispose: (group: Group) => void; // called on unregister(); dispose all GPU objects in group
}
interface RegisteredLayer {
config: WebGLLayerConfig;
group: Group;
}
export class WebGL2LayerClass {
private canvas = byId("webgl-canvas")!;
private renderer: WebGLRenderer | null = null;
private camera: OrthographicCamera | null = null;
private scene: Scene | null = null;
private layers: Map<string, RegisteredLayer> = new Map();
private pendingConfigs: WebGLLayerConfig[] = []; // queue for register() before init()
private resizeObserver: ResizeObserver | null = null;
private rafId: number | null = null;
init(): boolean {
this.renderer = new WebGLRenderer({
canvas: this.canvas,
antialias: true,
alpha: true,
});
this.renderer.setPixelRatio(window.devicePixelRatio);
this.renderer.setSize(window.innerWidth, window.innerHeight, false);
this.scene = new Scene();
this.camera = new OrthographicCamera(
0,
window.innerWidth,
0,
window.innerHeight,
-1,
1,
);
console.log("WebGL2Layer: initialized");
svg.on("zoom.webgl", () => this.requestRender());
// Process pre-init registrations (register() before init() is explicitly safe)
for (const config of this.pendingConfigs) {
const group = new Group();
config.setup(group);
this.scene.add(group);
this.layers.set(config.id, { config, group });
}
this.pendingConfigs = [];
// this.observeResize();
return true;
}
register(config: WebGLLayerConfig): void {
if (!this.scene) {
// init() has not been called yet — queue for processing in init()
this.pendingConfigs.push(config);
return;
}
// Post-init registration: create group immediately
const group = new Group();
// group.renderOrder = config.renderOrder;
config.setup(group);
this.scene.add(group);
this.layers.set(config.id, { config, group });
}
unregister(id: string): void {
const layer = this.layers.get(id);
if (!layer || !this.scene) return;
const scene = this.scene;
layer.config.dispose(layer.group);
scene.remove(layer.group);
this.layers.delete(id);
const anyVisible = [...this.layers.values()].some((l) => l.group.visible);
if (this.canvas && !anyVisible) this.canvas.style.display = "none";
}
setVisible(id: string, visible: boolean): void {
const layer = this.layers.get(id);
if (!layer) return;
layer.group.visible = visible;
const anyVisible = [...this.layers.values()].some((l) => l.group.visible);
if (this.canvas) this.canvas.style.display = anyVisible ? "block" : "none";
if (visible) this.requestRender();
}
clearLayer(id: string): void {
const layer = this.layers.get(id);
if (!layer) return;
layer.group.clear();
this.requestRender();
}
requestRender(): void {
if (this.rafId !== null) return;
this.rafId = requestAnimationFrame(() => {
this.rafId = null;
this.render();
});
}
syncTransform(): void {
if (!this.camera) return;
const width = window.innerWidth || 960;
const height = window.innerHeight || 540;
console.log("WebGL2Layer: syncTransform", { width, height });
this.camera.left = (0 - viewX) / scale;
this.camera.right = (width - viewX) / scale;
this.camera.top = (0 - viewY) / scale;
this.camera.bottom = (height - viewY) / scale;
this.camera.updateProjectionMatrix();
}
private observeResize(): void {
if (!this.renderer) return;
this.resizeObserver = new ResizeObserver((entries) => {
const { width, height } = entries[0].contentRect;
if (this.renderer && width > 0 && height > 0) {
this.renderer.setSize(width, height, false);
this.requestRender();
}
});
this.resizeObserver.observe(this.canvas);
}
private render(): void {
if (!this.renderer || !this.scene || !this.camera) return;
this.syncTransform();
for (const layer of this.layers.values()) {
if (layer.group.visible) layer.config.render(layer.group);
}
this.renderer.render(this.scene, this.camera);
}
}
declare global {
var WebGLLayer: WebGL2LayerClass;
}
window.WebGLLayer = new WebGL2LayerClass();

21
src/renderers/draw-relief-icons.ts
View file

@ -14,7 +14,6 @@ import {
import { RELIEF_SYMBOLS } from "../config/relief-config";
import type { ReliefIcon } from "../modules/relief-generator";
import { generateRelief } from "../modules/relief-generator";
import { getLayerZIndex } from "../modules/webgl-layer-framework";
import { byId } from "../utils";
const textureCache = new Map<string, Texture>(); // set name → Texture
@ -22,10 +21,8 @@ let terrainGroup: Group | null = null;
let lastBuiltIcons: ReliefIcon[] | null = null;
let lastBuiltSet: string | null = null;
WebGL2LayerFramework.register({
WebGLLayer.register({
id: "terrain",
anchorLayerId: "terrain",
renderOrder: getLayerZIndex("terrain"),
setup(group: Group): void {
terrainGroup = group;
preloadTextures();
@ -64,8 +61,6 @@ function loadTexture(set: string): Promise<Texture | null> {
texture.minFilter = LinearMipmapLinearFilter;
texture.magFilter = LinearFilter;
texture.generateMipmaps = true;
// renderer.capabilities.getMaxAnisotropy() removed: renderer is now owned by
// WebGL2LayerFramework. LinearMipmapLinearFilter provides sufficient quality.
textureCache.set(set, texture);
resolve(texture);
},
@ -115,12 +110,6 @@ function buildSetMesh(
u1 = (col + 1) / cols;
const v0 = row / rows,
v1 = (row + 1) / rows;
// FR15 rotation verification (Story 2.1): r.i is a sequential icon index (0-based),
// NOT a rotation angle. pack.relief entries contain no rotation field.
// Both the WebGL path (this function) and the SVG fallback (drawSvg) produce
// unrotated icons — visual parity maintained per FR19.
// If per-icon rotation is required in a future story, add `rotation: number` (radians)
// to ReliefIcon and apply quad rotation around center (r.x + r.s/2, r.y + r.s/2).
const x0 = r.x,
x1 = r.x + r.s;
const y0 = r.y,
@ -215,7 +204,7 @@ window.drawRelief = (
const icons = pack.relief?.length ? pack.relief : generateRelief();
if (!icons.length) return;
if (type === "svg" || WebGL2LayerFramework.hasFallback) {
if (type === "svg") {
drawSvg(icons, parentEl);
} else {
const set = parentEl.getAttribute("set") || "simple";
@ -225,13 +214,13 @@ window.drawRelief = (
lastBuiltIcons = icons;
lastBuiltSet = set;
}
WebGL2LayerFramework.requestRender();
WebGLLayer.requestRender();
});
}
};
window.undrawRelief = () => {
WebGL2LayerFramework.clearLayer("terrain");
WebGLLayer.clearLayer("terrain");
lastBuiltIcons = null;
lastBuiltSet = null;
const terrainEl = byId("terrain");
@ -239,7 +228,7 @@ window.undrawRelief = () => {
};
window.rerenderReliefIcons = () => {
WebGL2LayerFramework.requestRender();
WebGLLayer.requestRender();
};
declare global {

2
src/types/global.ts
View file

@ -92,7 +92,7 @@ declare global {
var changeFont: () => void;
var getFriendlyHeight: (coords: [number, number]) => string;
var WebGL2LayerFramework: import("../modules/webgl-layer-framework").WebGL2LayerFrameworkClass;
var WebGLLayer: import("../modules/webgl-layer").WebGL2LayerClass;
var drawRelief: (type?: "svg" | "webGL", parentEl?: HTMLElement) => void;
var undrawRelief: () => void;
var rerenderReliefIcons: () => void;