2026-04-23 20:48:36 +01:00
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<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>IFC Viewer</title>
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<link rel="icon" href="data:,">
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<style>
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*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
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body { background: #1c1c1e; color: #f0f0f0;
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font-family: system-ui, sans-serif; overflow: hidden; }
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#viewer { position: fixed; inset: 0; }
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#toolbar {
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position: fixed; top: 0; left: 0; right: 0; z-index: 10;
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display: flex; align-items: center; gap: 8px; padding: 8px 12px;
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background: rgba(28,28,30,0.85); backdrop-filter: blur(8px);
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border-bottom: 1px solid rgba(255,255,255,0.08);
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}
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2026-04-23 21:15:30 +01:00
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#url-input {
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flex: 1; font-size: 12px; color: #f0f0f0; font-family: monospace;
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background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12);
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border-radius: 4px; padding: 3px 8px; outline: none; min-width: 0;
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2026-04-23 20:48:36 +01:00
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}
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2026-04-23 21:15:30 +01:00
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#url-input:focus { border-color: rgba(255,255,255,0.3); }
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#url-input::placeholder { color: #606068; }
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2026-04-23 20:48:36 +01:00
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#status {
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position: fixed; bottom: 12px; left: 50%;
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transform: translateX(-50%); z-index: 10;
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font-size: 13px; color: #a0a0a8;
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background: rgba(28,28,30,0.85);
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padding: 4px 12px; border-radius: 4px;
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pointer-events: none;
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}
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#status:empty { display: none; }
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2026-04-23 21:15:30 +01:00
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body.drag-over::after {
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content: "Drop ifc:// URL to load";
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position: fixed; inset: 0; z-index: 100;
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display: flex; align-items: center; justify-content: center;
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font-size: 24px; color: #f0f0f0;
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background: rgba(28,28,30,0.7);
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pointer-events: none;
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}
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2026-04-23 20:48:36 +01:00
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</style>
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<script type="importmap">
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{
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"imports": {
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"three": "https://esm.sh/three@0.177.0",
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"three/addons/": "https://esm.sh/three@0.177.0/examples/jsm/",
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"web-ifc": "https://unpkg.com/web-ifc@0.0.75/web-ifc-api.js",
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"@thatopen/fragments": "https://esm.sh/@thatopen/fragments@3.3.1?external=three,web-ifc",
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"@thatopen/components": "https://esm.sh/@thatopen/components@3.3.1?external=three,web-ifc,@thatopen/fragments"
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}
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}
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</script>
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</head>
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<body>
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<div id="toolbar">
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2026-04-23 21:15:30 +01:00
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<input id="url-input" type="text" placeholder="Paste ifc:// URL and press Enter" spellcheck="false">
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2026-04-23 20:48:36 +01:00
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</div>
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<div id="viewer"></div>
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<div id="status"></div>
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2026-04-23 20:48:36 +01:00
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<script type="module">
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import * as THREE from "three";
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import * as OBC from "@thatopen/components";
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const params = new URLSearchParams(window.location.search);
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const ifcUrl = params.get("url") ?? "";
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const statusEl = document.getElementById("status");
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2026-04-23 21:15:30 +01:00
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const urlInput = document.getElementById("url-input");
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urlInput.value = ifcUrl;
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// -----------------------------------------------------------------------
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// Navigate to the viewer with a different ifc:// URL.
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// -----------------------------------------------------------------------
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function loadUrl(url) {
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const pageUrl = new URL(window.location.href);
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pageUrl.searchParams.set("url", url);
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window.location.href = pageUrl.toString();
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}
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urlInput.addEventListener("keydown", e => {
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if (e.key === "Enter") {
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const v = urlInput.value.trim();
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if (v) loadUrl(v);
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}
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});
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// -----------------------------------------------------------------------
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// Drag-and-drop: accept ifc:// URLs dragged onto the page.
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// Also handles viewer page URLs containing ?url=ifc://...
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// -----------------------------------------------------------------------
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document.body.addEventListener("dragover", e => {
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e.preventDefault();
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document.body.classList.add("drag-over");
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});
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document.body.addEventListener("dragleave", e => {
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if (!e.relatedTarget) document.body.classList.remove("drag-over");
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});
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document.body.addEventListener("drop", e => {
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e.preventDefault();
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document.body.classList.remove("drag-over");
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const candidates = [
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e.dataTransfer.getData("text/uri-list"),
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e.dataTransfer.getData("text/plain"),
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];
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for (const blob of candidates) {
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for (const line of (blob || "").split(/\r?\n/)) {
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const t = line.trim();
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if (!t || t.startsWith("#")) continue;
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if (t.startsWith("ifc://")) { loadUrl(t); return; }
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try {
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const u = new URL(t, window.location.href);
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const p = u.searchParams.get("url");
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if (p && p.startsWith("ifc://")) { loadUrl(p); return; }
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} catch { /* not a URL */ }
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}
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}
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});
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2026-04-23 20:48:36 +01:00
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2026-04-23 21:15:30 +01:00
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// -----------------------------------------------------------------------
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// Coordinate transforms between IFC world space (Z-up) and Three.js (Y-up).
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// IFC → Three.js: (x, y, z) → (x, z, -y)
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// Three.js → IFC: (x, y, z) → (x, -z, y)
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// -----------------------------------------------------------------------
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const toIfc = v => ({ x: v.x, y: -v.z, z: v.y });
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const toThree = (x, y, z) => new THREE.Vector3(x, z, -y);
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// -----------------------------------------------------------------------
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// Rebuild the ifc:// URL with the current camera viewpoint in IFC world
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// coordinates, and push it to the toolbar and browser address bar.
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2026-04-23 20:48:36 +01:00
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// -----------------------------------------------------------------------
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function syncCameraUrl(camera) {
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const pos = camera.position;
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const dir = new THREE.Vector3();
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camera.getWorldDirection(dir);
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const up = camera.up;
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const f = v => parseFloat(v.toFixed(4));
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const ip = toIfc(pos), id = toIfc(dir), iu = toIfc(up);
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const cameraParam = [
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f(ip.x), f(ip.y), f(ip.z),
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f(id.x), f(id.y), f(id.z),
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f(iu.x), f(iu.y), f(iu.z),
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2026-04-23 20:48:36 +01:00
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].join(",");
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const qIdx = ifcUrl.indexOf("?");
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const base = qIdx < 0 ? ifcUrl : ifcUrl.slice(0, qIdx);
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const qs = new URLSearchParams(qIdx < 0 ? "" : ifcUrl.slice(qIdx + 1));
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qs.set("camera", cameraParam);
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if (camera.isPerspectiveCamera) {
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qs.set("fov", f(camera.fov).toString());
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qs.delete("scale");
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} else {
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qs.set("scale", f(camera.top - camera.bottom).toString());
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qs.delete("fov");
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}
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const newIfcUrl = base + "?" + qs.toString().replace(/%2C/g, ",");
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urlInput.value = newIfcUrl;
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const pageUrl = new URL(window.location.href);
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pageUrl.searchParams.set("url", newIfcUrl);
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history.replaceState(null, "", pageUrl.toString());
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}
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2026-04-23 21:15:30 +01:00
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// -----------------------------------------------------------------------
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// If the ifc:// URL contains a camera= param, place the camera there.
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// Returns true if the camera was positioned from the URL.
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// -----------------------------------------------------------------------
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async function applyCameraParam(controls) {
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const qIdx = ifcUrl.indexOf("?");
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if (qIdx < 0) return false;
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const qs = new URLSearchParams(ifcUrl.slice(qIdx + 1));
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const camStr = qs.get("camera");
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if (!camStr) return false;
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const v = camStr.split(",").map(Number);
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if (v.length < 9 || v.some(isNaN)) return false;
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const pos = toThree(v[0], v[1], v[2]);
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const dir = toThree(v[3], v[4], v[5]);
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const target = pos.clone().add(dir);
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await controls.setLookAt(pos.x, pos.y, pos.z, target.x, target.y, target.z, false);
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return true;
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}
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2026-04-23 20:48:36 +01:00
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// -----------------------------------------------------------------------
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// Convert an ifc:// URL to a Forgejo raw file URL so the browser fetches
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// directly from Forgejo using its existing session (no proxy needed).
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//
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// ifc://host:port/org/repo@{hash}?path=file.ifc
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// → http://host:port/org/repo/raw/commit/{hash}/file.ifc
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// -----------------------------------------------------------------------
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function toRawUrl(raw) {
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const body = raw.slice("ifc://".length);
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const atIdx = body.indexOf("@");
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const qIdx = body.indexOf("?");
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const hostRepo = body.slice(0, atIdx);
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const ref = body.slice(atIdx + 1, qIdx < 0 ? undefined : qIdx);
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const qs = new URLSearchParams(qIdx < 0 ? "" : body.slice(qIdx + 1));
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const filePath = qs.get("path") ?? "";
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const slashIdx = hostRepo.indexOf("/");
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const host = hostRepo.slice(0, slashIdx);
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const repoPath = hostRepo.slice(slashIdx + 1);
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let refSeg;
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if (ref.startsWith("heads/")) refSeg = "branch/" + ref.slice(6);
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else if (ref.startsWith("tags/")) refSeg = "tag/" + ref.slice(5);
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else refSeg = "commit/" + ref;
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const protocol = host.startsWith("localhost") ? "http" : "https";
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return `${protocol}://${host}/${repoPath}/raw/${refSeg}/${filePath}`;
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}
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// -----------------------------------------------------------------------
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// Main
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// -----------------------------------------------------------------------
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async function main() {
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if (!ifcUrl) {
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statusEl.textContent = "Paste an ifc:// URL above or drag one onto the page.";
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return;
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}
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2026-04-23 21:15:30 +01:00
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statusEl.textContent = "Loading…";
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// --- World setup ---
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const components = new OBC.Components();
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const worlds = components.get(OBC.Worlds);
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const world = worlds.create();
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const container = document.getElementById("viewer");
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world.scene = new OBC.SimpleScene(components);
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world.renderer = new OBC.SimpleRenderer(components, container);
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world.camera = new OBC.OrthoPerspectiveCamera(components);
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world.scene.setup();
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components.init();
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// --- FragmentsManager ---
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// Firefox blocks cross-origin module workers; wrap in a blob URL so the
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// worker is always same-origin regardless of where it was fetched from.
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const fragments = components.get(OBC.FragmentsManager);
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const workerResp = await fetch(
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"https://unpkg.com/@thatopen/fragments@3.3.1/dist/Worker/worker.mjs"
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);
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const workerUrl = URL.createObjectURL(
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new Blob([await workerResp.text()], { type: "application/javascript" })
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);
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fragments.init(workerUrl);
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// --- IfcLoader ---
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const ifcLoader = components.get(OBC.IfcLoader);
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await ifcLoader.setup({
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autoSetWasm: false,
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wasm: {
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path: "https://unpkg.com/web-ifc@0.0.75/",
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absolute: true,
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},
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});
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// --- Fetch IFC bytes directly from Forgejo ---
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statusEl.textContent = "Fetching IFC file…";
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let buffer;
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try {
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const resp = await fetch(toRawUrl(ifcUrl));
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if (!resp.ok) throw new Error(`HTTP ${resp.status} ${resp.statusText}`);
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buffer = new Uint8Array(await resp.arrayBuffer());
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} catch (err) {
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statusEl.textContent = `Fetch error: ${err.message}`;
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return;
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}
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// --- Parse and render ---
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statusEl.textContent = "Parsing IFC…";
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try {
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const model = await ifcLoader.load(buffer, true, "model");
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world.scene.three.add(model.object);
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const box = model.box;
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const hasCam = await applyCameraParam(world.camera.controls);
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if (!hasCam && !box.isEmpty()) {
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await world.camera.controls.fitToBox(box, false);
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}
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model.useCamera(world.camera.three);
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|
await fragments.core.update(true);
|
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|
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|
|
|
|
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|
syncCameraUrl(world.camera.three);
|
|
|
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|
world.camera.controls.addEventListener("rest", () => {
|
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|
syncCameraUrl(world.camera.three);
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|
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});
|
|
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|
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statusEl.textContent = "";
|
|
|
|
|
} catch (err) {
|
|
|
|
|
statusEl.textContent = `Render error: ${err.message}`;
|
|
|
|
|
console.error(err);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
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|
|
|
|
main();
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|
|
|
|
</script>
|
|
|
|
|
</body>
|
|
|
|
|
</html>
|
