/**
 * Geometry cache building for snap detection.
 *
 * Extracts vertices, edges, and connectivity information from mesh data
 * for efficient snap-target lookups.
 */
import type { MeshData } from '@ifc-lite/geometry';
import type { Vec3 } from './raycaster.js';
export interface MeshGeometryCache {
    vertices: Vec3[];
    edges: Array<{
        v0: Vec3;
        v1: Vec3;
        index: number;
    }>;
    vertexValence: Map<string, number>;
    vertexEdges: Map<string, number[]>;
}
/**
 * Build a geometry cache for a mesh: deduplicated vertices, filtered edges,
 * and vertex-valence / vertex-edge connectivity maps.
 */
export declare function buildGeometryCache(mesh: MeshData): MeshGeometryCache;
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