fromJSON(json, parent, options) {
        var obj = new PointMarker(json.userData.text, {
            domWidth: options.domWidth,
            domHeight: options.domHeight
        });

        Object3DSerializer.prototype.fromJSON.call(this, json, obj);

        return obj;
    }
PointMarkerSerializer
@author tengge / https://github.com/tengge1