import { type PlateSurfacePartition, type SlabNode } from '@pascal-app/core';
import { BufferGeometry } from 'three';
export type SplitBucket = {
    role: string;
    geometry: BufferGeometry;
};
/**
 * Split a slab buffer by face orientation only — the pre-plate behaviour, kept
 * verbatim for manual slabs so their two meshes and their paint slots never
 * change.
 */
export declare function splitSlabFacesByFacing(geometry: BufferGeometry): {
    top: BufferGeometry;
    side: BufferGeometry;
};
/**
 * Split a plate buffer into one bucket per rendered role: a top bucket per
 * partition cell, `edge` / `riser` per exposure run, and `underside`. Buckets
 * come back in a stable order (cells in partition order, then the sides) so the
 * mesh order of a plate is the same on every rebuild.
 */
export declare function splitPlateFaces(geometry: BufferGeometry, partition: PlateSurfacePartition, slab: Pick<SlabNode, 'elevation' | 'thickness' | 'polygon' | 'holes'>): SplitBucket[];
export declare function clipPlateTerrainFill(geometry: BufferGeometry, partition: PlateSurfacePartition): BufferGeometry;
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