import type { Vector3 } from '@holoscript/core';
/**
 * TriggerZone.ts
 *
 * Trigger zones: enter/stay/exit callbacks, shape overlap tests,
 * zone stacking, and entity tracking.
 *
 * @module physics
 */
export type TriggerEvent = 'enter' | 'stay' | 'exit';
export type TriggerCallback = (entityId: string, zoneId: string, event: TriggerEvent) => void;
export interface TriggerShape {
    type: 'box' | 'sphere';
    position: [number, number, number] | Vector3;
    halfExtents?: [number, number, number] | Vector3;
    radius?: number;
}
export interface TriggerZoneConfig {
    id: string;
    shape: TriggerShape;
    enabled: boolean;
    tags: string[];
}
export declare class TriggerZoneSystem {
    private zones;
    private callbacks;
    private occupants;
    addZone(config: TriggerZoneConfig): void;
    removeZone(id: string): void;
    enableZone(id: string, enabled: boolean): void;
    onTrigger(zoneId: string, callback: TriggerCallback): void;
    private fire;
    update(entities: Array<{
        id: string;
        position: [number, number, number];
        radius?: number;
    }>): void;
    private overlaps;
    private getComponent;
    isInside(entityId: string, zoneId: string): boolean;
    getOccupants(zoneId: string): string[];
    getZonesForEntity(entityId: string): string[];
    getZoneCount(): number;
}
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