/**
 * FrustumCuller.ts
 *
 * Frustum culling: 6-plane frustum extraction, AABB/sphere tests,
 * batch culling, and visibility sets.
 *
 * @module spatial
 */
import { Vector3 } from './SpatialTypes';
export interface Plane4 {
    a: number;
    b: number;
    c: number;
    d: number;
}
export interface BoundingVolume {
    id: string;
    type: 'aabb' | 'sphere';
    center: Vector3;
    halfExtents?: Vector3;
    radius?: number;
}
type BoundingVolumeInput = BoundingVolume & {
    centerX?: number;
    centerY?: number;
    centerZ?: number;
    halfExtentX?: number;
    halfExtentY?: number;
    halfExtentZ?: number;
};
export type CullResult = 'inside' | 'intersect' | 'outside';
export declare class FrustumCuller {
    private planes;
    private volumes;
    private visibleSet;
    setFrustumFromPerspective(fovDeg: number, aspect: number, near: number, far: number, eyeX: number, eyeY: number, eyeZ: number, lookX: number, lookY: number, lookZ: number): void;
    setPlanes(planes: Plane4[]): void;
    getPlaneCount(): number;
    addVolume(volume: BoundingVolumeInput): void;
    removeVolume(id: string): void;
    getVolumeCount(): number;
    testSphere(cx: number, cy: number, cz: number, radius: number): CullResult;
    testAABB(cx: number, cy: number, cz: number, hx: number, hy: number, hz: number): CullResult;
    cullAll(): string[];
    isVisible(id: string): boolean;
    getVisibleCount(): number;
}
export {};
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