import { IDisposable } from './misc/IDisposable';
import { ArgEvent } from './misc/Events';
export declare class Time implements IDisposable {
    /**
     * Scalar value for how fast time passes. 0 = paused, 0.5 = half speed, 1.0 = normal, 2.0 = 2x fast, 4.0 = 4x fast, etc.
     */
    timeScale: number;
    onUpdate: ArgEvent<Time>;
    private _frameCount;
    private _timeSinceStart;
    private _deltaTime;
    private _clock;
    private _timeWaitPromises;
    private _frameWaitPromises;
    constructor();
    /**
     * Number of frames that have passed since this game view was created.
     */
    get frameCount(): number;
    /**
     * Number of seconds that have passed since this game view was created. This is affected by timeScale.
     */
    get timeSinceStart(): number;
    /**
     * Time in seconds that has passed since the last frame. This is affected by timeScale.
     */
    get deltaTime(): number;
    update(): void;
    /**
     * Return a promise that waits the given number of seconds before resolving.
     * @param seconds Number of seconds to wait before resolving the promise.
     */
    waitForSeconds(seconds: number): Promise<void>;
    /**
     * Return a promise that resolves once the next frame has started.
     */
    waitForNextFrame(): Promise<void>;
    /**
     * Return a promise that resolves once the the given number of frames has passed.
     */
    waitForFrames(frameCount: number): Promise<void>;
    dispose(): void;
}