import { Vector2 } from "three/src/Three";
import type { ReadonlyVector2 } from "../../../math/ReadonlyVector2";
import type { IGridCollidable } from "../../grid_physics2d/IGridCollidable";
/**
 * Pathfinder that uses the A* algorithm to find the shortest path between two points.
 * it works in grid coordinates.
 * it has iteration limits to prevent infinite loops.
 */
export declare class Pathfinder {
    private readonly _checkCollisionWidth;
    private readonly _checkCollisionHeight;
    private readonly _iterationLimit;
    private readonly _collideMaps;
    /**
     *
     * @param collideMaps collide maps to use for collision detection
     * @param checkCollisioWidth width of the collision check,
     * this value should be set to "gridCellWidth / 2",
     * if character is bigger than one grid cell you can increase the value accordingly.
     * @param checkCollisionHeight height of the collision check,
     * this value should be set to "gridCellHeight / 2",
     * if character is bigger than one grid cell you can increase the value accordingly.
     * @param iterationLimit maximum number of pathfinding iterations, If you want to passfind further, you need to increase the value
     */
    constructor(collideMaps?: IGridCollidable[], checkCollisionWidth?: number, checkCollisionHeight?: number, iterationLimit?: number);
    /**
     * adds a new collide map to the list of collide maps
     * @param collideMap
     */
    addCollideMap(collideMap: IGridCollidable): void;
    /**
     * removes a collide map from the list of collide maps
     * @param collideMap
     */
    removeCollideMap(collideMap: IGridCollidable): void;
    /**
     * removes all collide maps
     */
    removeAllCollideMaps(): void;
    /**
     * finds the shortest path between two points
     * @param startGridPosition start position in grid coordinates (integers value)
     * @param endGridPosition end position in grid coordinates (integers value)
     * @returns the shortest path between the two points
     */
    findPath(startGridPosition: ReadonlyVector2, endGridPosition: ReadonlyVector2): Vector2[] | null;
    private getNeighbors;
    private calculatePath;
    private calculateDistanceCost;
    private getLowestFcostNode;
    private checkCollision;
}