import type { Point2 } from '../../types';
import { Vector2 } from '../geometry';
import Curve from './Curve';
/**
 * Utility class for manipulating Quadratic Bézier curves
 *
 * @exports
 * @class QuadraticBezierCurve
 * @extends Curve<Vector2>
 */
export default class QuadraticBezierCurve extends Curve<Vector2> {
    readonly type: string;
    /**
     *  X-axis coordinate of the start point
     */
    x1: number;
    /**
     *  Y-axis coordinate of the start point
     */
    y1: number;
    /**
     * X-axis coordinate of the control point
     */
    cpx: number;
    /**
     * Y-axis coordinate of the control point
     */
    cpy: number;
    /**
     *  X-axis coordinate of the end point
     */
    x2: number;
    /**
     *  Y-axis coordinate of the end point
     */
    y2: number;
    /**
     * @param {number} x1  X-axis coordinate of the start point
     * @param {number} y1  Y-axis coordinate of the start point
     * @param {number} cpx X-axis coordinate of the control point
     * @param {number} cpy Y-axis coordinate of the control point
     * @param {number} x2  X-axis coordinate of the end point
     * @param {number} y2  Y-axis coordinate of the end point
     */
    constructor(x1: number, y1: number, cpx: number, cpy: number, x2: number, y2: number);
    /**
     * Interpolate a point on this Quadratic Bézier curve
     *
     * @param {number} t Normalized time value to interpolate
     * @returns {Vector2} Interpolated coordinates on this curve
     */
    getPoint(t: number): Vector2;
    /**
     * Interpolate a point on a Quadratic Bézier curve
     *
     * @param {number} t   Normalized time value to interpolate
     * @param {number} x1  X-axis coordinate of the start point
     * @param {number} y1  Y-axis coordinate of the start point
     * @param {number} cpx X-axis coordinate of the control point
     * @param {number} cpy Y-axis coordinate of the control point
     * @param {number} x2  X-axis coordinate of the end point
     * @param {number} y2  Y-axis coordinate of the end point
     * @returns {Point2} Interpolated coordinates on the curve
     */
    static interpolate(t: number, x1: number, y1: number, cpx: number, cpy: number, x2: number, y2: number): Point2;
}