import * as THREE from "three";
/**
 * 线性过程值
 * @param from - 初始值
 * @param to - 结束值
 * @param pst - 完成度(0-1)
 * @returns 计算值
 */
declare function progressNumber(from: number, to: number, pst: number): number;
/**
 * 弧度过程值
 * @param from - 初始值
 * @param to - 结束值
 * @param pst - 完成度(0-1)
 * @returns 计算值
 */
declare function progressRad(from: number, to: number, pst: number): number;
/**
 * 线性一步过程
 * @param from - 初始值
 * @param to - 结束值
 * @param step - 步径
 * @returns 计算值
 */
declare function stepNumber(from: number, to: number, step: number): number;
declare function stepVector(from: THREE.Vector3, to: THREE.Vector3, step: number): THREE.Vector3;
type coordinates = {
    longitude: number;
    latitude: number;
};
/**
 * 坐标一步过程
 * @param from - 初始值
 * @param to - 结束值
 * @param step - 步径
 * @returns 计算值
 */
declare function stepCoordinates(from: coordinates, to: coordinates, step: number): coordinates;
export { progressNumber, progressRad, stepNumber, stepVector, stepCoordinates, };