import { Observable } from 'rxjs/internal/Observable';
import { ITransformData, Vector } from 'xyzt';
import { Touch } from '../../touch/Touch';
import { TouchController } from '../../touch/TouchController';
interface ITwoFingerringOptions {
    touchController: TouchController;
    touch1: Touch;
    touch2: Touch;
    getElementCenter: () => Vector;
    pick: Array<keyof ITransformData>;
}
export declare function _twoFingerring({ touch1, touch2, getElementCenter, pick, }: ITwoFingerringOptions): Observable<ITransformData>;
export {};