import { Engine, BodyId, Zodiac } from "./chart.js";
export declare const CAZIMI_DEG = 0.2833;
export declare const COMBUST_DEG = 8.5;
export declare const UNDER_BEAMS_DEG = 15;
/** Signed shortest angle from b to a, in (-180, 180] degrees. */
export declare function signedElongation(lonA: number, lonB: number): number;
/** Unsigned angular separation in [0, 180] degrees. */
export declare function separation(lonA: number, lonB: number): number;
export type AspectPhase = "applying" | "separating" | "exact";
/** Applying/separating/exact for the aspect (degrees) between body a and body b,
 *  from their longitudes and longitude speeds (deg/day). Applying = the orb to
 *  the exact aspect is closing. */
export declare function aspectPhase(lonA: number, speedA: number, lonB: number, speedB: number, aspectDeg: number): AspectPhase;
export interface AspectMatch {
    aspect: string;
    orb: number;
    separation: number;
    phase: AspectPhase;
}
/** The tightest major aspect between two bodies at jd, within orb, or null.
 *  orb is the signed distance from exact (degrees). */
export declare function aspectBetween(engine: Engine, bodyA: BodyId, bodyB: BodyId, jdUt: number, zodiac?: Zodiac, orbs?: Record<string, number>): AspectMatch | null;
export type SolarPhase = "cazimi" | "combust" | "under_beams" | null;
/** Ecliptic-longitude separation between a body and the Sun (degrees). */
export declare function solarElongation(engine: Engine, body: BodyId, jdUt: number, zodiac?: Zodiac): number;
/** cazimi / combust / under_beams / null for a body's nearness to the Sun by
 *  ecliptic longitude. The Sun itself returns null. */
export declare function solarPhase(engine: Engine, body: BodyId, jdUt: number, zodiac?: Zodiac, cazimi?: number, combust?: number, underBeams?: number): SolarPhase;
export interface PlanetaryHour {
    ruler: string;
    kind: "day" | "night";
    hour: number;
    dayRuler: string;
    start: number;
    end: number;
}
/** The planetary hour containing jdUt at a place, or null at latitudes where
 *  the Sun does not rise or set on the day in question. */
export declare function planetaryHour(engine: Engine, jdUt: number, lat: number, lonEast: number): PlanetaryHour | null;
export interface VoidOfCourse {
    isVoid: boolean;
    sign: string;
    signExit: number;
    nextAspect: number | null;
}
/** Void-of-course state of the Moon at jdUt: void from its last perfecting
 *  aspect to a traditional planet (Sun..Saturn) until it leaves the sign it
 *  occupies at jdUt. */
export declare function voidOfCourse(engine: Engine, jdUt: number, zodiac?: Zodiac, maxDays?: number): VoidOfCourse;
/** 1-based house number for an ecliptic longitude (degrees) given the twelve
 *  cusps (degrees), wrapping across 0. */
export declare function houseOf(lon: number, cusps: number[]): number;
/** angular / succedent / cadent for a 1-based house number. */
export declare function angularity(house: number): "angular" | "succedent" | "cadent";