import type { StarPhysicsInput } from '../../types/body.types';
import type { GodRaysParams } from '../../config/render';
/**
 * Derives screen-space god rays parameters from a star's physical properties.
 *
 * - exposure : driven by luminosity, compensated by visual size (see below)
 * - decay    : driven by baseline radius (larger type → longer rays)
 * - density  : driven by baseline radius (larger type → denser step stretch)
 * - weight   : driven by tempK           (hotter star → sharper, more incisive rays)
 *
 * Visual-size compensation: stars are rendered larger than their SPECTRAL_TABLE
 * reference radius (× ~3 scale), which multiplies the sun's screen footprint
 * and floods the god-rays mask with seed pixels. Exposure is divided by the
 * area ratio (baseRadius / actualRadius)² so the perceived ray intensity
 * matches the baseline calibration regardless of visual scale.
 *
 * Calibrated on G-type reference (no radius override): exposure≈0.44,
 * decay≈0.94, density≈0.70, weight≈0.36.
 */
export declare function godRaysFromStar(cfg: StarPhysicsInput): GodRaysParams;
//# sourceMappingURL=godRaysFromStar.d.ts.map