/**
 * Selection Utilities
 * Helper functions for multi-entity selection operations
 */
import * as THREE from 'three';
import { ECSContext } from '../../ecs';
/**
 * Compute the centroid (average position) of selected entities
 * Used for placing the transform gizmo at the center of selection
 */
export declare function computeSelectionCentroid(ctx: ECSContext, eids: number[]): THREE.Vector3 | null;
/**
 * Compute the bounding box that contains all selected entities
 * Useful for visualization and bulk operations
 */
export declare function computeSelectionBounds(ctx: ECSContext, eids: number[]): THREE.Box3 | null;
/**
 * Compute the intersection of components across multiple entities
 * Returns component names that ALL entities have in common
 * Used for the unified inspector to show shared fields
 */
export declare function computeComponentIntersection(componentSets: Set<string>[]): string[];
/**
 * Check if two values are deeply equal
 * Used to determine if field values are the same across multiple entities
 */
export declare function deepEqual(a: any, b: any): boolean;
/**
 * Sentinel value to indicate mixed field values across entities
 */
export declare const MIXED_VALUE_SENTINEL: unique symbol;
//# sourceMappingURL=selectionUtils.d.ts.map