import * as THREE from 'three';
import { Geometry, Vector, Vector2, Vector3 } from 'three';
export declare const cZeroVec: THREE.Vector3;
export declare const cXAxis: THREE.Vector3;
export declare const cYAxis: THREE.Vector3;
export declare const cZAxis: THREE.Vector3;
/**
 * 旋转一个点,旋转中心在原点
 *
 * @export
 * @param {Vector3} pt 点
 * @param {number} ang 角度.
 * @returns {Vector3} 返回pt不拷贝.
 */
export declare function rotatePoint(pt: Vector3, ang: number): Vector3;
export declare function equaln(v1: number, v2: number, fuzz?: number): boolean;
export declare function equal<T extends Vector>(v1: T, v2: T): boolean;
export declare function fixAngle(an: number, fixAngle: number, fuzz?: number): number;
/**
 * 按照极坐标的方式移动一个点
 *
 * @export
 * @template
 * @param {T} v 向量(2d,3d)
 * @param {number} an 角度
 * @param {number} dis 距离
 * @returns {T}
 */
export declare function polar<T extends Vector2 | Vector3>(v: T, an: number, dis: number): T;
export declare function angle(v: Vector3 | Vector2): number;
/**
 * 求两个向量的夹角,顺时针为负,逆时针为正
 *
 * @param {THREE.Vector3} v1
 * @param {THREE.Vector3} v2
 * @param {THREE.Vector3} [ref] 参考向量,如果为世界坐标系则为0,0,1
 * @returns
 */
export declare function angleTo(v1: THREE.Vector3, v2: THREE.Vector3, ref?: THREE.Vector3): number;
export declare function getLoocAtUpVec(dir: THREE.Vector3): THREE.Vector3;
export declare function createLookAtMat4(dir: THREE.Vector3): THREE.Matrix4;
export declare function isParallelTo(v1: THREE.Vector3, v2: THREE.Vector3): boolean;
export declare function ptToString(v: THREE.Vector3, fractionDigits?: number): string;
export declare function midPoint(v1: THREE.Vector3, v2: THREE.Vector3): THREE.Vector3;
export declare function midPoint2(v1: THREE.Vector2, v2: THREE.Vector2): THREE.Vector2;
export declare function midPtCir(v1: THREE.Vector3, v2: THREE.Vector3): THREE.Vector3;
export declare function GetBox(obj: THREE.Object3D, updateMatrix?: boolean): THREE.Box3;
export declare function GetBoxArr(arr: Array<THREE.Object3D>): THREE.Box3;
export declare function MoveMatrix(v: THREE.Vector3): THREE.Matrix4;
export declare function getProjectDist(v1: Vector3, v2: Vector3): {
    h: number;
    v: number;
};
export declare function getPtPostion(sp: Vector3, ep: Vector3, c: Vector3, inPt: Vector3): {
    sp: THREE.Vector3;
    ep: THREE.Vector3;
};
export declare function angleAndX(v: Vector3 | Vector2): number;
/**
 * 将角度调整为0-2pi之间
 *
 * @export
 * @param {number} an
 */
export declare function angleTo2Pi(an: number): number;
export declare function updateGeometry(l: THREE.Line | THREE.Mesh, geometry: Geometry): void;