/**
 * Stores variations of the delta time, the time between each frame/update.
 */
export default class TimeStep {
    /**
     * The time of the start of the timestep in ms since the page loaded.
     *
     * @see [performance.now](https://developer.mozilla.org/en-US/docs/Web/API/Performance/now)
     */
    time: number;
    dt: number;
    lastDt: number;
    dtRatio: number;
    dtSquared: number;
    inverseDt: number;
    /**
     * Creates an {@link TimeStep}.
     *
     * @param time The current time
     * @param dt The current delta time
     * @param lastDt The last delta time
     */
    constructor(time: number, dt: number, lastDt: number);
}