export declare namespace PhysicsTools {
    /**WIP
     * calculates the vertical velocity for parabolic trajectory with horizontal speed
     * @param horizontal_speed horizontal speed
     * @param offset distance from launcher to target; (target.Position - launcher.Position);
     */
    function CalculateTrajectoryVerticalVelocity(horizontal_speed: number, offset: Vector3): number;
    /**
     * @param point
     * @param start start of the line
     * @param finish end of the line
     * @returns [t, position, is_on_the_line]
     */
    function GetClosestPositionOnLine(point: Vector3, start: Vector3, finish: Vector3): LuaTuple<[number, Vector3, boolean]>;
}