import type { LabelStyle } from "@johnmorrisdotca/hoshi-stars/sky-labels";
/** A star's place in the sky, in degrees. */
export interface SkyPoint {
    rightAscension: number;
    declination: number;
}
/** A figure of a culture as lines: its key and the pairs of stars its lines join (hoshi-stars' `CultureFigure`, to the part used here). */
export interface CultureFigureLines {
    id: string;
    segments: ReadonlyArray<readonly [SkyPoint, SkyPoint]>;
}
/** One figure on the screen: where its lines are in `segments`, and its box. */
export interface OnScreen {
    abbreviation: string;
    start: number;
    end: number;
    left: number;
    top: number;
    right: number;
    bottom: number;
    x: number;
}
/** What the sky layer needs of a set of figure lines: those of hoshi-stars' `FigureLines` and of `createCultureLines`. */
export interface Lines {
    readonly settings: Readonly<{
        strength?: number;
        reach?: number;
    }>;
    readonly style: LabelStyle;
    readonly segments: ArrayLike<number>;
    readonly count: number;
    readonly figures: readonly OnScreen[];
    opacityOf(figure: OnScreen): number;
    update(project: (rightAscension: number, declination: number, out: {
        x: number;
        y: number;
    }) => boolean, view: {
        width: number;
        height: number;
    }, avoid?: unknown): number;
    set(next: {
        strength?: number;
        lang?: unknown;
        style?: Partial<LabelStyle>;
    }): void;
}
/**
 * The lines of the figures of a culture.
 *
 * @param figures - The culture's figures, from hoshi-stars' `figures(culture)`.
 * @param strength - How strong the lines are when not lit, 0 to 1.
 * @param styleOf - Makes a label style (hoshi-stars' `labelStyle`) from a partial one.
 * @param style - The look of the names, a partial `LabelStyle`.
 * @returns The lines.
 */
export declare function createCultureLines(figures: readonly CultureFigureLines[], strength: number, styleOf: (style?: Partial<LabelStyle>) => LabelStyle, style?: Partial<LabelStyle>): Lines;