import { type AnyNode, type AnyNodeId, type CeilingNode } from '@pascal-app/core';
/** Handle floor for a ceiling at grade: keeps the drag arrow off the floor. */
export declare const CEILING_HANDLE_MIN_HEIGHT = 0.5;
/** Panel slider floor for a ceiling at grade. */
export declare const CEILING_PANEL_MIN_HEIGHT = 0;
export type CeilingHeightRange = {
    min: number;
    max: number;
};
/**
 * Where a ceiling's stored height may go. `max` clamps under the storey
 * plane and any covering slab from the level above (clamp, never ask);
 * `min` lets a ceiling on a level above grade hang down to grade, and
 * keeps `atGradeMin` on the ground storey.
 */
export declare function ceilingHeightRange(ceiling: Pick<CeilingNode, 'parentId' | 'polygon'>, nodes: Record<AnyNodeId, AnyNode>, atGradeMin: number): CeilingHeightRange;
/** Same order as the slider and handle clamps: the upper bound wins a conflict. */
export declare function clampCeilingHeight(height: number, range: CeilingHeightRange): number;
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