import { Quaternion } from "three";
import MeshAppendable from "../display/core/MeshAppendable";
export declare const lookToSystem: {
    add: ((item: MeshAppendable<import("three").Object3D<import("three").Event>>, initData?: {
        quaternion: Quaternion;
        quaternionNew: Quaternion;
        a1?: number | undefined;
    } | undefined) => false | import("@lincode/promiselikes").Cancellable) | ((item: MeshAppendable<import("three").Object3D<import("three").Event>>, initData?: {
        quaternion: Quaternion;
        quaternionNew: Quaternion;
        a1?: number | undefined;
    } | undefined) => boolean);
    delete: ((item: MeshAppendable<import("three").Object3D<import("three").Event>>) => false | import("@lincode/promiselikes").Cancellable | undefined) | ((item: MeshAppendable<import("three").Object3D<import("three").Event>>) => boolean);
};