export interface Point {
    x: number;
    y: number;
    z: number;
}
/**
 * BezierSpline
 * https://github.com/leszekr/bezier-spline-js
 *
 * @private
 * @copyright
 * Copyright (c) 2013 Leszek Rybicki
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
export default class Spline {
    duration: number;
    points: Point[];
    sharpness: number;
    centers: Point[];
    controls: Array<[Point, Point]>;
    stepLength: number;
    length: number;
    delay: number;
    steps: number[];
    constructor(options?: any);
    /**
     * Caches an array of equidistant (more or less) points on the curve.
     */
    cacheSteps(mindist: number): number[];
    /**
     * returns angle and speed in the given point in the curve
     */
    vector(t: number): {
        angle: number;
        speed: number;
    };
    /**
     * Gets the position of the point, given time.
     *
     * WARNING: The speed is not constant. The time it takes between control points is constant.
     *
     * For constant speed, use Spline.steps[i];
     */
    pos(time: number): Point;
}