/**
 * Halo mode state machine for the atmosphere shell.
 *
 * "Halo mode" collapses the volumetric shell to a thin fresnel-driven
 * liseré at the silhouette, in the pure body tint — used by the
 * playable-sol view to advertise the atmosphere's full radius without
 * covering the body's centre with bands, clouds or painted-tile
 * colours.
 *
 * Behaviour on enable:
 *   - opacity drops to a fraction of the baseline ({@link HALO_OPACITY_FACTOR})
 *   - `cloudAmount`, `storms`, `tileColorMix` zeroed
 *   - `uRimOnly` flag set so the shader's rim-only path kicks in
 *   - blending switches to additive so the rim reads as a glow even at
 *     low opacity against dark backgrounds
 *
 * On disable, baseline values captured at construction are restored —
 * any `setOpacity`/`setParams` calls made *while* halo mode was active
 * are NOT preserved on toggle off. Callers that need live tuning should
 * keep parameter mutations outside halo mode.
 */
import * as THREE from 'three';
/** Baseline values captured at shell-build time. */
export interface AtmoShellBaseline {
    opacity: number;
    cloudAmount: number;
    storms: number;
    tileColorMix: number;
}
/** Handle returned by {@link createAtmoShellHaloMode}. */
export interface AtmoShellHaloMode {
    setEnabled: (enabled: boolean) => void;
}
/**
 * Builds the halo-mode toggle for an atmosphere shell. Mutates the
 * provided uniforms and material in place; idempotent (re-enabling /
 * re-disabling the same state is a no-op).
 */
export declare function createAtmoShellHaloMode(input: {
    uniforms: Record<string, THREE.IUniform>;
    material: THREE.ShaderMaterial;
    baseline: AtmoShellBaseline;
}): AtmoShellHaloMode;
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