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feat(assets): EXT_materials_bump für gltf-transform

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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knsoandClaude Opus 5 committed 2026-09-14 10:39:39 +02:00
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package-lock.json
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@@ -12,6 +12,11 @@
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"funding": {
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"cpu": [
"x64"
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"dev": true,
"license": "Apache-2.0 AND LGPL-3.0-or-later",
"optional": true,
"os": [
"win32"
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"funding": {
"url": "https://opencollective.com/libvips"
}
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"resolved": "https://registry.npmjs.org/@jridgewell/gen-mapping/-/gen-mapping-0.3.13.tgz",
@@ -1189,6 +1825,13 @@
"dev": true,
"license": "MIT"
},
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"license": "MIT"
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"resolved": "https://registry.npmjs.org/@types/node/-/node-25.9.6.tgz",
@@ -1243,6 +1886,13 @@
"meshoptimizer": "~1.1.1"
}
},
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"license": "MIT"
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@@ -1618,6 +2268,16 @@
"license": "MIT",
"peer": true
},
"node_modules/cwise-compiler": {
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"resolved": "https://registry.npmjs.org/cwise-compiler/-/cwise-compiler-1.1.3.tgz",
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"dev": true,
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"uniq": "^1.0.0"
}
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"resolved": "https://registry.npmjs.org/debug/-/debug-4.4.3.tgz",
@@ -1646,6 +2306,16 @@
"node": ">=6"
}
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"node_modules/detect-libc": {
"version": "2.1.2",
"resolved": "https://registry.npmjs.org/detect-libc/-/detect-libc-2.1.2.tgz",
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"dev": true,
"license": "Apache-2.0",
"engines": {
"node": ">=8"
}
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"node_modules/dotenv": {
"version": "17.4.2",
"resolved": "https://registry.npmjs.org/dotenv/-/dotenv-17.4.2.tgz",
@@ -1820,6 +2490,20 @@
"license": "BSD-3-Clause",
"peer": true
},
"node_modules/iota-array": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/iota-array/-/iota-array-1.0.0.tgz",
"integrity": "sha512-pZ2xT+LOHckCatGQ3DcG/a+QuEqvoxqkiL7tvE8nn3uuu+f6i1TtpB5/FtWFbxUuVr5PZCx8KskuGatbJDXOWA==",
"dev": true,
"license": "MIT"
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},
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"resolved": "https://registry.npmjs.org/its-fine/-/its-fine-2.0.0.tgz",
@@ -1851,6 +2535,13 @@
"dev": true,
"license": "MIT"
},
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"dev": true,
"license": "MIT"
},
"node_modules/lil-gui": {
"version": "0.21.0",
"resolved": "https://registry.npmjs.org/lil-gui/-/lil-gui-0.21.0.tgz",
@@ -1915,9 +2606,9 @@
}
},
"node_modules/meshoptimizer": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/meshoptimizer/-/meshoptimizer-1.1.1.tgz",
"integrity": "sha512-oRFNWJRDA/WTrVj7NWvqa5HqE1t9MYDj2VaWirQCzCCrAd2GHrqR/sQezCxiWATPNlKTcRaPRHPJwIRoPBAp5g==",
"version": "1.2.0",
"resolved": "https://registry.npmjs.org/meshoptimizer/-/meshoptimizer-1.2.0.tgz",
"integrity": "sha512-davRZeIJbxJrE24cwQle7ZDsxjdk/OphNOV83oX+efQinyoHY9Jcyz3MHbaoG0qySZajldGztNZ1RN/T19PZsg==",
"dev": true,
"license": "MIT"
},
@@ -1998,6 +2689,51 @@
"node": "^10 || ^12 || ^13.7 || ^14 || >=15.0.1"
}
},
"node_modules/ndarray": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/ndarray/-/ndarray-1.1.1.tgz",
"integrity": "sha512-AsE8w/M2MS+0pD3nP5qbRRtJFeJJJaJ+qXZaZr0XjVGXhy6LIj2TERTlkpdK2AI3WufoOP+pwPk3q2ilAJcZ9g==",
"dev": true,
"license": "MIT",
"dependencies": {
"iota-array": "^1.0.0",
"is-buffer": "^1.0.2"
}
},
"node_modules/ndarray-lanczos": {
"version": "0.3.0",
"resolved": "https://registry.npmjs.org/ndarray-lanczos/-/ndarray-lanczos-0.3.0.tgz",
"integrity": "sha512-5kBmmG3Zvyj77qxIAC4QFLKuYdDIBJwCG+DukT6jQHNa1Ft74/hPH1z5mbQXeHBt8yvGPBGVrr3wEOdJPYYZYg==",
"dev": true,
"license": "MIT",
"dependencies": {
"@types/ndarray": "^1.0.11",
"ndarray": "^1.0.19"
}
},
"node_modules/ndarray-ops": {
"version": "1.2.2",
"resolved": "https://registry.npmjs.org/ndarray-ops/-/ndarray-ops-1.2.2.tgz",
"integrity": "sha512-BppWAFRjMYF7N/r6Ie51q6D4fs0iiGmeXIACKY66fLpnwIui3Wc3CXiD/30mgLbDjPpSLrsqcp3Z62+IcHZsDw==",
"dev": true,
"license": "MIT",
"dependencies": {
"cwise-compiler": "^1.0.0"
}
},
"node_modules/ndarray-pixels": {
"version": "5.2.0",
"resolved": "https://registry.npmjs.org/ndarray-pixels/-/ndarray-pixels-5.2.0.tgz",
"integrity": "sha512-lTh4tFKziAatVTa9crIsidUyn+lqujVOQpzfdBWvdFu2wo9Uo6z261lVX7SgMyP89xGmj3TMTPbbxl9YDnV4SA==",
"dev": true,
"license": "MIT",
"dependencies": {
"@types/ndarray": "^1.0.14",
"ndarray": "^1.0.19",
"ndarray-ops": "^1.2.2",
"sharp": "^0.35.0"
}
},
"node_modules/object-assign": {
"version": "4.1.1",
"resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -2197,6 +2933,13 @@
"three": ">= 0.168.0 < 0.185.0"
}
},
"node_modules/property-graph": {
"version": "4.1.0",
"resolved": "https://registry.npmjs.org/property-graph/-/property-graph-4.1.0.tgz",
"integrity": "sha512-AvPcP7XECNWy4LGmFQ77k7un4lSKM4eS29PTvW4ck95uYeLxXPWJM7hLuBqK91FaHqCcgJvIUCuNJjjxKE7VKQ==",
"dev": true,
"license": "MIT"
},
"node_modules/protocol-buffers-schema": {
"version": "3.6.1",
"resolved": "https://registry.npmjs.org/protocol-buffers-schema/-/protocol-buffers-schema-3.6.1.tgz",
@@ -2360,6 +3103,69 @@
"license": "MIT",
"peer": true
},
"node_modules/semver": {
"version": "7.8.5",
"resolved": "https://registry.npmjs.org/semver/-/semver-7.8.5.tgz",
"integrity": "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA==",
"dev": true,
"license": "ISC",
"bin": {
"semver": "bin/semver.js"
},
"engines": {
"node": ">=10"
}
},
"node_modules/sharp": {
"version": "0.35.4",
"resolved": "https://registry.npmjs.org/sharp/-/sharp-0.35.4.tgz",
"integrity": "sha512-n++8XWcj+jCOr2IOl7h8LbKnGBDY4aPbmprMONBNFdn0ImXqpGVv5zliDs0V9HbmbCQLpbuo2ej9rAoOQTvMDA==",
"dev": true,
"license": "Apache-2.0",
"dependencies": {
"@img/colour": "^1.1.0",
"detect-libc": "^2.1.2",
"semver": "^7.8.5"
},
"engines": {
"node": ">=20.9.0"
},
"funding": {
"url": "https://opencollective.com/libvips"
},
"optionalDependencies": {
"@img/sharp-darwin-arm64": "0.35.4",
"@img/sharp-darwin-x64": "0.35.4",
"@img/sharp-freebsd-wasm32": "0.35.4",
"@img/sharp-libvips-darwin-arm64": "1.3.3",
"@img/sharp-libvips-darwin-x64": "1.3.3",
"@img/sharp-libvips-linux-arm": "1.3.3",
"@img/sharp-libvips-linux-arm64": "1.3.3",
"@img/sharp-libvips-linux-ppc64": "1.3.3",
"@img/sharp-libvips-linux-riscv64": "1.3.3",
"@img/sharp-libvips-linux-s390x": "1.3.3",
"@img/sharp-libvips-linux-x64": "1.3.3",
"@img/sharp-libvips-linuxmusl-arm64": "1.3.3",
"@img/sharp-libvips-linuxmusl-x64": "1.3.3",
"@img/sharp-linux-arm": "0.35.4",
"@img/sharp-linux-arm64": "0.35.4",
"@img/sharp-linux-ppc64": "0.35.4",
"@img/sharp-linux-riscv64": "0.35.4",
"@img/sharp-linux-s390x": "0.35.4",
"@img/sharp-linux-x64": "0.35.4",
"@img/sharp-linuxmusl-arm64": "0.35.4",
"@img/sharp-linuxmusl-x64": "0.35.4",
"@img/sharp-webcontainers-wasm32": "0.35.4",
"@img/sharp-win32-arm64": "0.35.4",
"@img/sharp-win32-ia32": "0.35.4",
"@img/sharp-win32-x64": "0.35.4"
},
"peerDependenciesMeta": {
"@types/node": {
"optional": true
}
}
},
"node_modules/siginfo": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/siginfo/-/siginfo-2.0.0.tgz",
@@ -2632,6 +3438,14 @@
"dev": true,
"license": "Apache-2.0"
},
"node_modules/tslib": {
"version": "2.8.1",
"resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
"integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
"dev": true,
"license": "0BSD",
"optional": true
},
"node_modules/tsup": {
"version": "8.5.1",
"resolved": "https://registry.npmjs.org/tsup/-/tsup-8.5.1.tgz",
@@ -3214,6 +4028,13 @@
"dev": true,
"license": "MIT"
},
"node_modules/uniq": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/uniq/-/uniq-1.0.1.tgz",
"integrity": "sha512-Gw+zz50YNKPDKXs+9d+aKAjVwpjNwqzvNpLigIruT4HA9lMZNdMqs9x07kKHB/L9WRzqp4+DlTU5s4wG2esdoA==",
"dev": true,
"license": "MIT"
},
"node_modules/url-join": {
"version": "5.0.0",
"resolved": "https://registry.npmjs.org/url-join/-/url-join-5.0.0.tgz",
package.json
+7 -2
View File
@@ -8,12 +8,17 @@
"test": "vitest run"
},
"dependencies": {
"lil-gui": "^0.21.0",
"three": "0.184.0",
"three-mesh-bvh": "^0.9.14",
"three-player-controller": "file:three-player-controller",
"lil-gui": "^0.21.0"
"three-player-controller": "file:three-player-controller"
},
"devDependencies": {
"@gltf-transform/core": "4.5.0",
"@gltf-transform/extensions": "4.5.0",
"@gltf-transform/functions": "4.5.0",
"meshoptimizer": "1.2.0",
"sharp": "0.35.4",
"vite": "^7.3.0",
"vitest": "^3.2.0"
}
tests/bumpExtension.test.js
+65
View File
@@ -0,0 +1,65 @@
import { describe, expect, it } from "vitest";
import { Document, NodeIO } from "@gltf-transform/core";
import { KHRTextureTransform } from "@gltf-transform/extensions";
import { dedup, prune } from "@gltf-transform/functions";
import sharp from "sharp";
import { EXT_MATERIALS_BUMP, EXTMaterialsBump } from "../tools/assets/bumpExtension.mjs";
/** 8 × 8 px mit wechselnden Werten — prune() ersetzt einfarbige Texturen sonst durch Faktoren. */
function pattern() {
const data = Buffer.alloc(8 * 8 * 3);
for (let i = 0; i < data.length; i++) data[i] = (i * 37) & 0xff;
return sharp(data, { raw: { width: 8, height: 8, channels: 3 } }).png().toBuffer();
}
/** Ein Dreieck mit dem Material cont_a_side, Bump-Stärke 2,2 und Wellenteilung [3.2, 1]. */
async function bumpDocument() {
const document = new Document();
document.createBuffer();
const bumpExtension = document.createExtension(EXTMaterialsBump);
const transformExtension = document.createExtension(KHRTextureTransform);
const texture = document.createTexture("wellblech").setImage(await pattern()).setMimeType("image/png");
const bump = bumpExtension.createBump().setBumpFactor(2.2).setBumpTexture(texture);
bump.getBumpTextureInfo().setExtension("KHR_texture_transform", transformExtension.createTransform().setScale([3.2, 1]));
const material = document.createMaterial("cont_a_side").setExtension(EXT_MATERIALS_BUMP, bump);
const positions = document.createAccessor().setType("VEC3").setArray(new Float32Array([0, 0, 0, 1, 0, 0, 0, 1, 0]));
const primitive = document.createPrimitive().setMaterial(material).setAttribute("POSITION", positions);
document.createScene().addChild(document.createNode().setMesh(document.createMesh().addPrimitive(primitive)));
return document;
}
/** JSON-Teil einer .glb: 12 Byte Kopf, dann Länge und Typ des ersten Blocks, dann das JSON. */
function glbJson(glb) {
const view = new DataView(glb.buffer, glb.byteOffset, glb.byteLength);
return JSON.parse(new TextDecoder().decode(glb.subarray(20, 20 + view.getUint32(12, true))));
}
describe("EXT_materials_bump", () => {
const io = () => new NodeIO().registerExtensions([EXTMaterialsBump, KHRTextureTransform]);
// Bruch: @gltf-transform verwirft die Erweiterung (Wellblech flach), prune entfernt die Textur als
// unbenutzt, oder die Wellenteilung an der bumpTexture geht verloren (Wellen 3,2-mal zu breit).
it("übersteht dedup, prune, Schreiben und Einlesen mit Stärke, Textur und Teilung", async () => {
const document = await bumpDocument();
await document.transform(dedup(), prune());
const read = await io().readBinary(await io().writeBinary(document));
const bump = read.getRoot().listMaterials()[0].getExtension(EXT_MATERIALS_BUMP);
expect(bump.getBumpFactor()).toBe(2.2);
expect(bump.getBumpTexture().getSize()).toEqual([8, 8]);
expect(bump.getBumpTextureInfo().getExtension("KHR_texture_transform").getScale()).toEqual([3.2, 1]);
});
// Bruch: Feldnamen oder Aufbau weichen von der Spezifikation ab — three.js (GLTFLoader) liest
// genau materials[i].extensions.EXT_materials_bump.bumpFactor und .bumpTexture.index.
it("schreibt das JSON so, wie three.js es liest", async () => {
const json = glbJson(await io().writeBinary(await bumpDocument()));
expect(json.extensionsUsed).toContain(EXT_MATERIALS_BUMP);
const def = json.materials[0].extensions[EXT_MATERIALS_BUMP];
expect(def.bumpFactor).toBe(2.2);
expect(json.textures[def.bumpTexture.index]).toBeDefined();
expect(def.bumpTexture.extensions.KHR_texture_transform.scale).toEqual([3.2, 1]);
});
});
tools/assets/bumpExtension.mjs
+101
View File
@@ -0,0 +1,101 @@
// EXT_materials_bump für @gltf-transform (docs/superpowers/specs/2026-09-14-hood-yard-design.md).
// @gltf-transform 4.5.0 kennt die Erweiterung nicht und verwirft sie beim Einlesen. Das Wellblech der
// Container aus three-d-stage steckt aber allein darin, die Container selbst sind flache Kästen.
// Aufgebaut wie KHR_materials_transmission in @gltf-transform/extensions: bumpTexture ist eine echte
// Texturreferenz, damit dedup, prune und compressTexture sie sehen. Ihre TextureInfo läuft über
// setTextureInfo/createTextureInfoDef, so kommt KHR_texture_transform (die Wellenteilung, etwa
// scale [3.2, 1]) mit. three.js liest die Erweiterung selbst (GLTFLoader: bumpFactor -> bumpScale,
// bumpTexture -> bumpMap).
import { Extension, ExtensionProperty, PropertyType, TextureChannel, TextureInfo } from "@gltf-transform/core";
export const EXT_MATERIALS_BUMP = "EXT_materials_bump";
export class Bump extends ExtensionProperty {
static EXTENSION_NAME = EXT_MATERIALS_BUMP;
init() {
this.extensionName = EXT_MATERIALS_BUMP;
this.propertyType = "Bump";
this.parentTypes = [PropertyType.MATERIAL];
}
getDefaults() {
return Object.assign(super.getDefaults(), {
bumpFactor: 1,
bumpTexture: null,
bumpTextureInfo: new TextureInfo(this.graph, "bumpTextureInfo"),
});
}
getBumpFactor() {
return this.get("bumpFactor");
}
setBumpFactor(factor) {
return this.set("bumpFactor", factor);
}
getBumpTexture() {
return this.getRef("bumpTexture");
}
getBumpTextureInfo() {
return this.getRef("bumpTexture") ? this.getRef("bumpTextureInfo") : null;
}
setBumpTexture(texture) {
return this.setRef("bumpTexture", texture, { channels: TextureChannel.R });
}
}
export class EXTMaterialsBump extends Extension {
static EXTENSION_NAME = EXT_MATERIALS_BUMP;
extensionName = EXT_MATERIALS_BUMP;
prereadTypes = [PropertyType.MESH];
prewriteTypes = [PropertyType.MESH];
createBump() {
return new Bump(this.document.getGraph());
}
read() {
return this;
}
write() {
return this;
}
preread(context) {
const materialDefs = context.jsonDoc.json.materials ?? [];
const textureDefs = context.jsonDoc.json.textures ?? [];
materialDefs.forEach((materialDef, index) => {
const def = materialDef.extensions?.[EXT_MATERIALS_BUMP];
if (!def) return;
const bump = this.createBump();
context.materials[index].setExtension(EXT_MATERIALS_BUMP, bump);
if (def.extras) bump.setExtras(def.extras);
if (def.bumpFactor !== undefined) bump.setBumpFactor(def.bumpFactor);
if (def.bumpTexture !== undefined) {
bump.setBumpTexture(context.textures[textureDefs[def.bumpTexture.index].source]);
context.setTextureInfo(bump.getBumpTextureInfo(), def.bumpTexture);
}
});
return this;
}
prewrite(context) {
for (const material of this.document.getRoot().listMaterials()) {
const bump = material.getExtension(EXT_MATERIALS_BUMP);
if (!bump) continue;
const materialDef = context.jsonDoc.json.materials[context.materialIndexMap.get(material)];
const def = context.createPropertyDef(bump);
def.bumpFactor = bump.getBumpFactor();
const texture = bump.getBumpTexture();
if (texture) def.bumpTexture = context.createTextureInfoDef(texture, bump.getBumpTextureInfo());
materialDef.extensions = materialDef.extensions ?? {};
materialDef.extensions[EXT_MATERIALS_BUMP] = def;
}
return this;
}
}