import { Vertex } from './vertex';
import { Vector } from './vector';
/**
 * A polygonal edge in 2-dimensional space, effectively a line segment.
 */
export declare class Edge {
    /**
     * The starting vertex of the edge.
     */
    start: Vertex;
    /**
     * The ending vertex of the edge.
     */
    end: Vertex;
    /**
     * Constructs an edge with specified starting and ending vertices.
     * @param start A vertex representing the starting vertex of the edge.
     * @param end A vertex representing the ending vertex of the edge.
     */
    constructor(start: Vertex, end: Vertex);
    /**
     * Creates a new Edge object with the same properties of this one.
     * @returns A new Edge object.
     */
    copy(): Edge;
    /**
     * Creates a user-friendly formatted string for the edge. Elements are contained in parenthesis, separated by
     * commas and formatted as user-friendly vertices.
     * @returns A formatted string representing the edge.
     */
    toString(): string;
    /**
     * Creates a displacement vector between the start and end of the edge.
     * @param reverse Creates a displacement vector in the opposite direction if true.
     * @returns A displacement vector.
     */
    direction(reverse?: boolean): Vector;
    /**
     * Creates a vector normal to the edge. The method operates under the assumption that the edge is part of a CCW polygon.
     * @param clockwise Creates a normal vector in the opposite direction.
     * @returns A normal vector.
     */
    normal(clockwise?: boolean): Vector;
    /**
     * Calculates the length of the edge.
     * @returns The length of the edge.
     */
    length(): number;
    /**
     * Calculates the point of intersection between this and another edge.
     * @param edge The edge to intersect with this one.
     * @returns The point of intersection if it exists, null otherwise.
     */
    intersectEdge(edge: Edge): Vertex;
}
/**
 * Shorthand constructor for an Edge object.
 * @param start The starting vertex of the edge.
 * @param end The ending vertex of the edge.
 * @returns A new Edge instance.
 */
export declare function edge(start: Vertex, end: Vertex): Edge;