/**
 * SceneQuery.ts
 *
 * Scene queries: frustum culling, spatial range queries,
 * tag/layer filtering, and visitor pattern.
 *
 * @module scene
 */
import { SceneNode } from './SceneNode';
export interface Frustum {
    position: [number, number, number];
    direction: [number, number, number];
    fov: number;
    near: number;
    far: number;
}
export type NodeVisitor = (node: SceneNode) => boolean;
export declare class SceneQuery {
    static findByTag(root: SceneNode, tag: string): SceneNode[];
    static findByLayer(root: SceneNode, layer: number): SceneNode[];
    static findByName(root: SceneNode, name: string): SceneNode | null;
    static findInRadius(root: SceneNode, center: [number, number, number], radius: number): SceneNode[];
    static frustumCull(root: SceneNode, frustum: Frustum): SceneNode[];
    static visit(root: SceneNode, visitor: NodeVisitor): void;
    private static normalize;
}
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