/**
 * Pure, DOM-free layout math for the vz-hub lobby: distribute N content panels
 * around the viewer as {lat, lon} positions (degrees), so the placement can be
 * unit-tested without a renderer. Panels sit at eye level (lat 0) and are
 * centered on dead-ahead (lon 0); once the arc would wrap past ~330° they
 * spread evenly around a full ring instead.
 */
export interface HubPanelPosition {
    /** Vertical angle in degrees (0 = eye level). */
    lat: number;
    /** Horizontal angle in degrees, normalized to [-180, 180] (0 = dead ahead). */
    lon: number;
}
export interface HubLayoutOptions {
    /** Degrees between adjacent panels in the front-arc layout. */
    spacingDeg?: number;
    /** Eye-level offset for all panels. */
    lat?: number;
}
/** Normalize an angle in degrees to the range [-180, 180]. */
export declare function normalizeLon(lon: number): number;
export declare function hubPanelLayout(count: number, opts?: HubLayoutOptions): HubPanelPosition[];
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