import { Box } from './Box';
/**
 * @private
 */
export declare const utils: {
    adaptive: boolean;
    maxLength: number;
    minSegments: number;
    maxSegments: number;
    epsilon: number;
    _segmentsCount(length: number, defaultSegments?: number): number;
};
export declare function findIndexFromLUT(lut: number[], length: number): number;
export declare function boxFromLUT(lut: number[]): Box;
/**
 * Utilities for quadratic curves.
 * @private
 */
export declare const quadratic: {
    /**
     * Calculate length of quadratic curve
     * @see {@link http://www.malczak.linuxpl.com/blog/quadratic-bezier-curve-length/}
     * for the detailed explanation of math behind this.
     * @private
     * @param fromX - x-coordinate of curve start point
     * @param fromY - y-coordinate of curve start point
     * @param cpX - x-coordinate of curve control point
     * @param cpY - y-coordinate of curve control point
     * @param toX - x-coordinate of curve end point
     * @param toY - y-coordinate of curve end point
     * @returns - Length of quadratic curve
     */
    curveLength(fromX: number, fromY: number, cpX: number, cpY: number, toX: number, toY: number): number;
    /**
     * Calculate the points for a quadratic bezier curve and then draws it.
     * Based on: https://stackoverflow.com/questions/785097/how-do-i-implement-a-bezier-curve-in-c
     * @private
     * @param cpX - Control point x
     * @param cpY - Control point y
     * @param toX - Destination point x
     * @param toY - Destination point y
     */
    generateLUT(fromX: number, fromY: number, cpX: number, cpY: number, toX: number, toY: number): number[];
};
/**
 * Utilities for bezier curves
 * @private
 */
export declare const bezier: {
    /**
     * Calculate length of bezier curve.
     * Analytical solution is impossible, since it involves an integral that does not integrate in general.
     * Therefore numerical solution is used.
     * @private
     * @param fromX - Starting point x
     * @param fromY - Starting point y
     * @param cpX - Control point x
     * @param cpY - Control point y
     * @param cpX2 - Second Control point x
     * @param cpY2 - Second Control point y
     * @param toX - Destination point x
     * @param toY - Destination point y
     * @returns - Length of bezier curve
     */
    curveLength(fromX: number, fromY: number, cpX: number, cpY: number, cpX2: number, cpY2: number, toX: number, toY: number): number;
    /**
     * Calculate the curve LUT
     *
     * @ignore
     * @param toX - Source point x
     * @param toY - Source point y
     * @param cpX - Control point x
     * @param cpY - Control point y
     * @param cpX2 - Second Control point x
     * @param cpY2 - Second Control point y
     * @param toX - Destination point x
     * @param toY - Destination point y
     */
    generateLUT(fromX: number, fromY: number, cpX: number, cpY: number, cpX2: number, cpY2: number, toX: number, toY: number): number[];
};
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