fromJSON(json, parent) {
        var obj = parent === undefined ? new THREE.PlaneBufferGeometry(
            json.parameters.width,
            json.parameters.height,
            json.parameters.widthSegments,
            json.parameters.heightSegments
        ) : parent;

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

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