/**
 * One coherent baluster guard laid out along a rail path, as oriented boxes.
 *
 * A guard is built the way a joiner builds it: a newel at each end (and, when
 * a spacing is given, every bay between), a top rail and a bottom rail that
 * follow the path with a square fitting block closing every interior corner,
 * and square pickets spanning the two rails. The path sampling, corner finding
 * and newel/picket stations are the style-agnostic chassis in `guard-path.ts`,
 * shared with the deck post-and-rail guard; this file only turns those stations
 * into the baluster style's members. The caller renders the boxes
 * (`renderer.tsx`) or merges them into one mesh (`continuous-railings.tsx`),
 * so this stays pure data — no Three.js meshes, no React.
 *
 * `pickets` is a metre pitch sampled along the horizontal run, so the density
 * tracks the run rather than the path's tessellation. Pickets that fall inside
 * a newel are dropped. `reach` runs the rails that far past the top vertex
 * along the final slope to die into a post standing there; `topPost: false`
 * then omits the top newel.
 */
import { type GuardBox, type GuardRail, type Vec3 } from './guard-path.js';
export type BalusterGuardOptions = {
    railHeight: number;
    /** Metre pitch for pickets, sampled along the horizontal run. */
    pickets: number;
    /** Metres between newels along the run; omit (or Infinity) for ends only. */
    postSpacing?: number;
    topPost?: boolean;
    postThrough?: boolean;
    /** Metres the rails run past the top vertex, along the final slope. */
    reach?: number;
};
/** The two rails' section (`across` the run, `vertical`) and `y` off the nosing line. */
export declare const BALUSTER_RAIL_PROFILE: {
    readonly top: {
        readonly across: 0.062;
        readonly vertical: 0.05;
        readonly y: 0;
    };
    readonly bottom: {
        readonly across: 0.045;
        readonly vertical: 0.045;
        readonly y: 0.08;
    };
};
/** A guard's rails as `{ center y off the nosing line, section across, vertical }`,
 * bottom-to-top. Shared with the flight-to-flight connector so a bridge carries
 * the same rails as the guards it joins. */
export declare function balusterGuardRails(railHeight: number): GuardRail[];
export declare function buildBalusterGuard(points: Vec3[], options: BalusterGuardOptions): GuardBox[];
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