type SectionAxis = 'x' | 'y' | 'z';
/** A clipping section: cut perpendicular to `axis` at `frac` (0..1) of that axis's bbox span. */
export interface SectionSpec {
    axis: SectionAxis;
    frac: number;
}
/** A numbered label anchored at a 3D feature, projected per-view into the render (Set-of-Marks). */
export interface Mark {
    label: string;
    pos: readonly [number, number, number];
}
interface MarkBody {
    index: number;
    bounds?: {
        xMin: number;
        xMax: number;
        yMin: number;
        yMax: number;
        zMin: number;
        zMax: number;
    } | undefined;
}
interface MarkBore {
    axisOrigin: readonly [number, number, number];
}
/**
 * Kernel-anchored marks for the judge: `B<index>` at each body's bbox centroid (only for multi-body
 * parts — a single body needs no label) and `H1..` at each bore's axis. The same id lands on the same
 * feature across every view (it's a 3D anchor projected per-view), giving the judge view-invariant,
 * part-space addressing without per-body mesh color.
 *
 * Body labels use the body's INDEX (0-based), matching how the measured-facts digest refers to bodies
 * ("bodies 0&1: interfering"), so the judge can cross-reference a mark with the facts. A body that
 * can't be located (no bounds) simply gets no mark — there is no resequenced gap.
 */
export declare function featureMarks(bodies: readonly MarkBody[], bores: readonly MarkBore[]): Mark[];
interface AimBore {
    radius: number;
    axisOrigin: readonly [number, number, number];
    axisDir: readonly [number, number, number];
}
interface AimBounds {
    xMin: number;
    xMax: number;
    yMin: number;
    yMax: number;
    zMin: number;
    zMax: number;
}
/**
 * Aim a section cut through the dominant (largest-radius) bore: cut on the basis axis MOST
 * perpendicular to the bore axis, positioned to pass THROUGH the bore origin — so the bore opens as
 * a clean cross-section (reads wall thickness, where the xray is cluttered). Returns null when there
 * are no bores or no bounds. Plain structural inputs keep this decoupled from the verify report.
 */
export declare function aimedSection(bores: readonly AimBore[], bounds: AimBounds | undefined): SectionSpec | null;
export {};