xeokit AutoCAD DWG Loader

Imports AutoCAD DWG documents as SceneModels — strokes from LINE / LWPOLYLINE / POLYLINE / CIRCLE / ARC / ELLIPSE, fills from 3DFACE, recursive INSERT block expansion, and TEXT / MTEXT rasterised as textured quads.

DWG parsing uses @mlightcad/libredwg-web (Emscripten port of GNU libredwg) dynamically imported from a CDN on first call. Licence: libredwg is GPL-3.0; apps shipping it (whether via this loader's CDN default or a self-hosted copy) must honour that licence.

Usage

import {Scene} from "@xeokit/sdk/model/scene";
import {DWGLoader} from "@xeokit/sdk/formats/dwg";

const scene = new Scene();
const sceneModel = scene.createModel({id: "plan"}).value!;
const fileData = await fetch("/plan.dwg").then(r => r.arrayBuffer());

const result = await new DWGLoader().load({fileData, sceneModel}, {
  scale: 1,
  circleSteps: 64,
  lineWidthScale: 4.0,
  objectIdStrategy: "layer",
});
Copy

See DWGLoadOptions for per-call tuning (scale, colour overrides, circle tessellation, INSERT recursion limit, text rasterisation options). The libredwg CDN URLs are configured once on the constructor — see DWGLoaderParams.

Self-hosting / Node usage

Configure the CDN URLs on the constructor to self-host the WASM blob (CSP / offline / version pinning):

const loader = new DWGLoader({
  libredwgEsmUrl:  "/static/libredwg-web/index.js",
  libredwgWasmDir: "/static/libredwg-web/wasm",
});
await loader.load({fileData, sceneModel});
Copy

For Node, dynamic CDN imports don't work without polyfills — pre-initialise libredwg and inject it on the constructor:

import {LibreDwg, Dwg_File_Type} from "@mlightcad/libredwg-web";
const lib = await LibreDwg.create();
const loader = new DWGLoader({
  libredwg: {lib, fileType: Dwg_File_Type},
});
await loader.load({fileData, sceneModel});
Copy