/**
 * A scene is a container for separating logically-different sections of your game - a title screen, a cutscene player,
 * the actual game, credits screen and so on.
 */
export interface Scene {
    /**
     * Called every frame.
     *
     * @param {number} passedTime The time that passed since the last frame in milliseconds
     */
    update(passedTime: number): void;
    /**
     * Runs when this scene is changed to in [[SceneManager]].
     */
    onStarted(): void;
    /**
     * Runs when another scene replaces this one in [[SceneManager]].
     */
    onEnded(): void;
}
/**
 * A class for managing which scene is currently active.
 */
export declare class SceneManager {
    private _currentScene?;
    /**
     * Called every frame, will call `update()` of the current scene.
     *
     * @param {number} passedTime The time that passed since the last frame in milliseconds
     */
    update(passedTime: number): void;
    /**
     * Changes the scene calling `onEnded()` on the scene that was previously active and `onStarted()` on the new one.
     *
     * @param {Scene} newScene The new scene that should replace the old one.
     */
    changeScene(newScene: Scene): void;
}