@needle-tools/engine/src/engine/xr/usdz.ts

Needle Engine is a web-based runtime for 3D apps. It runs on your machine for development with great integrations into editors like Unity or Blender - and can be deployed onto any device! It is flexible, extensible and networking and XR are built-in.

declare type USDZExporter = {
    exportAndOpen(): Promise<any>,
}

/** 
 * Internal registry for USDZ exporters. This is used by NeedleXRSession.start("immersive-ar")
 */
export namespace InternalUSDZRegistry {

    const usdzExporter: USDZExporter[] = [];

    export function exportAndOpen(): boolean {
        if (!usdzExporter?.length) return false;
        for (const exp of usdzExporter) {
            exp.exportAndOpen();
        }
        return true;
    }
    export function registerExporter(exporter: USDZExporter) {
        usdzExporter.push(exporter);
    }
    export function unregisterExporter(exporter: USDZExporter) {
        if (!usdzExporter) return;
        const index = usdzExporter.indexOf(exporter);
        if (index >= 0) {
            usdzExporter.splice(index, 1);
        }
    }

}