/**
 * Body render configuration — visual constants and FX configs scoped to
 * a single body's rendering pipeline.
 *
 * Scene-level constants (camera FOV, main orbit speed, god-rays mask
 * layer, etc.) are caller-owned and intentionally live outside this lib.
 */
/** Orbital drag sensitivity in the preview panel. */
export declare const PREVIEW_ORBIT_SPEED = 0.85;
/** Camera focus interpolation rate (lerp per second). */
export declare const FOCUS_LERP = 5;
/** Sun/star visual radius in world units — must match the star body config. */
export declare const SHADOW_SUN_RADIUS = 3;
/** Number of line segments in an orbital trail ring. */
export declare const ORBIT_TRAIL_SEGMENTS = 128;
/**
 * Tunable parameters for the screen-space god-rays (volumetric scattering)
 * post-processing pass. Fed to `GodRaysShader` uniforms.
 */
export interface GodRaysParams {
    /** Overall ray brightness */
    exposure: number;
    /** Attenuation per step — closer to 1 = longer rays */
    decay: number;
    /** Step stretch factor */
    density: number;
    /** Per-sample weight before angular modulation */
    weight: number;
}
/**
 * Configuration for the lens-flare overlay rendered in front of a star.
 * Scales the three flare sub-sprites (glow, ring, ghosts) independently.
 */
export interface LensFlareConfig {
    enabled: boolean;
    glowScale: number;
    ringScale: number;
    ghostScale: number;
    ghostOpacity: number;
}
/**
 * Screen-space sun effect bundle — blinding glow + concentric rings,
 * composited on top of the god-rays pass.
 */
export interface SunFXConfig {
    blindingEnabled: boolean;
    blindingIntensity: number;
    blindingSize: number;
    ringsEnabled: boolean;
    ringsCount: number;
    ringsOpacity: number;
    ringsSpread: number;
}
/** Default lens-flare configuration — balanced for a G-type reference star. */
export declare const DEFAULT_LENS_FLARE: LensFlareConfig;
/** Default sun-FX configuration — moderate blinding with 5 rings. */
export declare const DEFAULT_SUN_FX: SunFXConfig;
/**
 * Visual configuration for the per-tile hover overlay (fill + border ring),
 * consumed by `TileOverlayMesh` when rendering the hovered hex.
 */
export type HoverConfig = {
    /** Fill overlay color (hex integer, e.g. 0xffffff). */
    fillColor: number;
    /** Fill overlay opacity — uses additive blending, keep low (0.05 – 0.3). */
    fillOpacity: number;
    /** Border quad-strip color. */
    borderColor: number;
    /** Border opacity. */
    borderOpacity: number;
    /**
     * Border width as a fraction of the tile's average boundary radius.
     * 0.08 ≈ 8% of the tile radius — visible but not overwhelming.
     */
    borderWidth: number;
    /**
     * Z-offset added on top of the tile height to avoid z-fighting.
     * Expressed as a scale delta on the sphere radius (≈ world units at r=1).
     */
    surfaceOffset: number;
    /**
     * Outward expansion of the ring beyond the boundary vertices,
     * as a fraction of the tile average boundary radius.
     */
    ringExpand: number;
};
/** Default tile hover overlay — additive white fill with a thin white ring. */
export declare const DEFAULT_HOVER: HoverConfig;
/**
 * Visual configuration for the body-level hover ring drawn around a planet
 * silhouette. All dimensions are screen-space so the ring stays constant
 * across camera zoom.
 */
export type BodyHoverConfig = {
    /** Circle stroke color. */
    ringColor: number;
    /** Circle stroke opacity. */
    ringOpacity: number;
    /**
     * Gap between the planet's silhouette edge and the circle's inner radius,
     * in screen pixels. Maintained at any zoom level.
     */
    ringMarginPx: number;
    /**
     * Circle stroke width in screen pixels. Maintained at any zoom level.
     */
    ringWidthPx: number;
};
/** Default body hover ring — white stroke, 2 px wide, 6 px offset. */
export declare const DEFAULT_BODY_HOVER: BodyHoverConfig;
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