declare type Vec = number[] | THREE.Vector3 | THREE.Euler;
/**
 * Information about the fillet.
 */
export declare type FilletInfo = {
    /** Contains both start points of adjacent lines of control point. Actually both start points are equal to control point. */
    lineStarts: Vec[];
    /** Contains both end points of adjacent lines of control point. */
    lineEnds: Vec[];
    /** Control point of fillet. It's the point where both lines intersect. */
    control: Vec;
};
/**
 * Point definition where the fillet will be added with a specified radius.
 */
export declare type FilletPoint = {
    /** Point where the corner of the polyline will be. */
    point: THREE.Vector3;
    /** Radius of the fillet at the position of point. */
    radius: number;
};
/**
 * Polyline of points and bulges. Bulges define the arc between the current and the next point.
 */
export declare type Polyline = {
    /** Points where the corners of the polyline will be. */
    points: THREE.Vector3[];
    /** Bulges which define the arcs. */
    bulges: number[];
};
/**
 * Returns the adjacent points of the fillet arc. These are the points where fillet arc tangentially touches the lines.
 * @param info contains all information for the fillet, like start- and endpoints of adjacent lines and control point
 * @param radius radius of the fillet arc
 */
export declare const getTouchPoints: (info: FilletInfo, radius: number) => import("three").Vector3[] | null;
/**
 * Calculates and returns the including angle between the touchpoints of the fillet. Attention: It is the angle of touchpoints and center of fillet arc and not the one between touchpoints and control point.
 * @param info
 */
export declare const getIncludingBulgeAngle: (info: FilletInfo) => number;
export {};