/** @packageDocumentation
 * @module OrbitGT
 */
declare type int32 = number;
declare type float64 = number;
/** @internal */
export declare class GridIndex {
    /** The x index */
    x: int32;
    /** The y index */
    y: int32;
    /** The z index */
    z: int32;
    /**
     * Create a new point.
     * @param x the x index.
     * @param y the y index.
     * @param z the z index.
     */
    constructor(x: int32, y: int32, z: int32);
    /**
     * Get the square distance to another cell.
     * @param other the other cell.
     * @return the square distance.
     */
    distanceSq(other: GridIndex): int32;
    /**
     * Get the distance to another cell.
     * @param other the other cell.
     * @return the distance.
     */
    distance(other: GridIndex): float64;
    /**
     * Get a next-level index.
     * @param index the index at the current level.
     * @return the next-level index.
     */
    private static getNextLevelIndex1;
    /**
     * Get a next-level index.
     * @param nextLevel the index at the next level.
     */
    getNextLevelIndex(nextLevel: GridIndex): void;
    /**
     * Does this point equal another?
     * @param other the other point.
     * @return true if equal.
     */
    same(other: GridIndex): boolean;
    /**
     * Create a copy.
     * @return a copy.
     */
    copy(): GridIndex;
    /**
     * Get the unique key.
     * @return the unique key.
     */
    getKey(): string;
    /**
     * The standard toString method.
     * @see Object#toString
     */
    toString(): string;
}
export {};
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