import { Scene, type ColorRepresentation } from 'three/webgpu';
export interface SceneSnapshot {
    name: string;
    background: ColorRepresentation | null;
    environmentRotation: {
        x: number;
        y: number;
        z: number;
    };
    children: string[];
}
/**
 * Manages multiple scenes and provides scene-level utilities.
 */
export declare class SceneManager {
    private scenes;
    private _activeSceneKey;
    /**
     * Add a scene with a key.
     */
    add(key: string, scene: Scene): void;
    /**
     * Create and register a new scene.
     */
    create(key: string, options?: {
        background?: ColorRepresentation;
    }): Scene;
    /**
     * Get a scene by key.
     */
    get(key: string): Scene | undefined;
    /**
     * Remove a scene by key.
     */
    remove(key: string): void;
    /**
     * Get the currently active scene key.
     */
    get activeKey(): string | null;
    /**
     * Set the active scene key (for external use to track which scene is active).
     */
    set activeKey(key: string | null);
    /**
     * List all registered scene keys.
     */
    keys(): string[];
    /**
     * Serialize scene metadata to JSON (children names/ids, background, etc.).
     */
    serialize(key: string): SceneSnapshot | null;
    /**
     * Clear all scenes.
     */
    clear(): void;
    get size(): number;
}