IFC exchange body - OpenGeometry

OpenGeometry does not write IFC files. It gives the exact geometry of a solid in a form that an IFC writer can turn into an IfcAdvancedBrep or a CSG body.

import {
  OpenGeometry,
  Solid,
  OG_PRIMITIVE_CUBOID,
  OG_TRANSFORM_TRANSLATE,
  type AnalyticExchangeBodyV2,
} from 'opengeometry';

await OpenGeometry.create(
  { wasmURL: '/opengeometry_bg.wasm' },
  { workerURL: '/tessellation-worker.js' },
);

const solid = new Solid(OG_PRIMITIVE_CUBOID, { width: 2, height: 3, depth: 0.2 });
solid.transform(OG_TRANSFORM_TRANSLATE, { offset: [4, 0, 1] });
const body: AnalyticExchangeBodyV2 = OpenGeometry.exportIfcBody(solid);
console.log(body.representation_type, body.up_axis, body.solids.length, body.faces.length);

This prints AdvancedBrep Z 1 6.

What you get

AnalyticExchangeBodyV2 is a read-only object:

schema_version: 2.
World metres, with Z up.
representation_type: 'AdvancedBrep', or 'CSG' for a solid with a cavity.
entities, solids and faces: the geometry and topology for the writer. Values are of type IfcPreparedValue.

It is the same version 2 object as prepareIfcExchange() gave in 2.0.18.

Rules

exportIfcBody takes one solid. A sheet, a wire or an assembly throws.

Last modified on November 10, 2026