/**
* Decimal round down
**/
export declare function floor10(value: any, exp: any): any;
/**
* Decimal round up
**/
export declare function ceil10(value: any, exp: any): any;
/**
 * Decimal round to nearest
 * @example
 * ```javascript
 * round10(55.55, -1);   // result: 55.6
 * round10(55.549, -1);  // result: 55.5
 * round10(55, 1);       // result: 60
 * round10(1.005, -2);   // result: 1.01 -- compare this result with Math.round(1.005*100)/100
 *                       // (Note rounding mistake due to inaccurate floating point arithmetic)
 * ```
 * @param value
 * @param exp
 */
export declare function round10(value: number, exp?: number): number;
/**
 * Normalize rectangle rect=[x1, y1, x2, y2] so that (x1,y1) < (x2,y2)
 * For coordinate systems whose origin lies in the bottom-left, this
 * means normalization to (BL,TR) ordering. For systems with origin in the
 * top-left, this means (TL,BR) ordering.
 * @param rect
 **/
export declare function normalizeRect(rect: number[]): number[];
/**
 * Rotate point (x,y) coordinates around point (cx, cy).
 * Note, this function assumes a Cartesian coordinate system - values on the Y axis become higher as you go up.
 * @param cx center point x
 * @param cy center point y
 * @param x point to rotate, x
 * @param y point to rotate, y
 * @param angle rotation angle
 * @param isDeg specifies if rotation angle is in degrees.
 **/
export declare function rotatePoint(cx: number, cy: number, x: number, y: number, angle: number, isDeg?: boolean): number[];
/**
 * Calculates the counter clockwise angle between two vectors.
 * @returns Returns angle in degrees.
 * @param p1 First vector point, [x1, y1].
 * @param p2 Second vector point, [x2, y2].
 * @param c A common center point that exists on both vectors, [cx, cy].
 */
export declare function findVectorsAngle(p1: number[], p2: number[], cp: number[]): number;
/**
 * Convert radians to degrees.
 * @param radians
 **/
export declare function rad2Deg(radians: number): number;
/**
 * Convert degrees to radians.
 * @param radians
 **/
export declare function deg2rad(degrees: number): number;
/**
 * Rotate the rectangle.
 * @param rect rectangle coordinates [x1, y1, x2, y2].
 * @param cxcy center point [x, y].
 * @param angle rotation angle (default - in degrees)
 * @param isDeg specifies if rotation angle is in degrees. Default is true.
 */
export declare function rotateRect(rect: number[], cxcy: number[] | null, angle: number, isDeg?: boolean): number[];
export declare function reverseRotateRect(transformedRect: number[], cxcy: number[] | null, angleDeg: any): number[];
export declare function getDistance(x1: any, y1: any, x2: any, y2: any): number;
/**
 * Gets angle (radians) at point x2,y2.
 * @param x1
 * @param y1
 * @param x2
 * @param y2
 */
export declare function getAngle(x1: any, y1: any, x2: any, y2: any): number;
/**
 * @ignore exclude from docs
 * @param rect
 * @param cxcy
 * @param angle
 * @param isDeg
 */
export declare function rotateRectAndFillBoth(rect: number[], cxcy: number[], angle: number, isDeg?: boolean): {
    rotatedRect: number[];
    transformedRect: number[];
};
/**
 * Finds intersection point between two lines AB and CD.
 * @param A point A: [x, y]
 * @param B point B: [x, y]
 * @param C point C: [x, y]
 * @param D point D: [x, y]
 */
export declare function findLinesIntersection(A: number[], B: number[], C: number[], D: number[]): number[] | null;