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+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", diff --git a/package.json b/package.json index 81b11f7..272b16b 100644 --- a/package.json +++ b/package.json @@ -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" } diff --git a/tests/bumpExtension.test.js b/tests/bumpExtension.test.js new file mode 100644 index 0000000..fcf5983 --- /dev/null +++ b/tests/bumpExtension.test.js @@ -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]); + }); +}); diff --git a/tools/assets/bumpExtension.mjs b/tools/assets/bumpExtension.mjs new file mode 100644 index 0000000..f37c923 --- /dev/null +++ b/tools/assets/bumpExtension.mjs @@ -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; + } +}