.js

import Parser from 'parser';

export default class {
    constructor(pool) {
        this.pool = pool;
        return attribs => {
            switch (attribs.type) {
                case Parser.Factory.Link:

                    let { ref, matrix } = attribs.data;
                    let item = this.pool.find(obj => obj.userData.id === ref);
                    if (item) {
                        // Add reference to the current model, transform it
                        let clone = item.clone();
                        clone.applyMatrix(new THREE.Matrix4().set(...matrix));
                        attribs.model.add(clone);
                    }
            }
        }
    }
}