import { Entity } from '../entities/entity.js';
import { EntitySystem } from '../entities/system.js';
import { vec3 } from 'gl-matrix';
export interface EntityHit {
    entity: Entity;
    distance: number;
    point: vec3;
    normal: vec3;
}
export interface Ray {
    origin: vec3;
    direction: vec3;
}
/**
 * Casts a ray into the entity world and returns all entities intersected by the ray.
 * The results are sorted by distance from the ray origin.
 */
export declare function rayCastEntities(entities: EntitySystem, ray: Ray): EntityHit[];
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