import { type AnyNode, type AnyNodeId, type WallMiterData, type WallNode, type WallSlabSupportSegment } from '@pascal-app/core';
import * as THREE from 'three';
import { Brush } from 'three-bvh-csg';
export { isWallInitialBuildActive } from './wall-build-lifecycle';
export { drainRebuiltWalls } from './wall-rebuild-notifications';
export declare function mergeWallCutoutBrushes(brushes: readonly Brush[]): {
    cutter: Brush | null;
    fallbackBrushes: Brush[];
    droppedCount: number;
};
export declare function shouldDeferWallRebuild(wallId: string, nodes: Record<AnyNodeId, AnyNode>, rebuiltThisFrame: number, elapsedMs: number): boolean;
/** Rebuilds this system still owes — neighbours deferred during a drag. */
export declare function getPendingWallRebuildCount(): number;
export declare const WallSystem: () => null;
export declare function runWallBuildFrame(): void;
type WallTerrainBottomSampler = (x: number, z: number) => number | null;
export declare function generateExtrudedWall(wallNode: WallNode, childrenNodes: AnyNode[], miterData: WallMiterData, slabElevation?: number, baseElevation?: number, baseSegments?: readonly WallSlabSupportSegment[], storeyHeight?: number, terrainBottomAt?: WallTerrainBottomSampler): THREE.BufferGeometry;
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