import Particle from "./particle";
export declare class kdNode {
    particle: Particle;
    left: kdNode;
    right: kdNode;
    constructor(particle: Particle, left: kdNode, right: kdNode);
    /**
     * Determines wether the node is a leaf node or not.
     *
     * @returns Wether the node is a leaf node or not
     */
    isLeaf(): boolean;
}
/**
 * Represents a kdTree that contains {@link Particle}s.
 */
export default class kdTree {
    root: kdNode;
    /**
     * Creates a {@link kdTree}.
     *
     * @param particles The particles to add to the tree
     */
    constructor(particles: Particle[]);
    /**
     * Builds the {@link kdTree}.
     *
     * @param particles The particles to add to the tree
     */
    build(particles: Particle[], depth?: number): kdNode;
    /**
     * Finds all the neighbours of a particle within the given distance.
     *
     * @param particle The particle to find neighbours of
     * @param dist The maximum distance a neighbour can be from the particle
     * @param distSqr The maximum distance squared a neighbour can be from the particle
     */
    findNeighbours(particle: Particle, dist: number, distSqr: number): Particle[];
    private findNeighboursHelper;
}