import * as THREE from 'three';
import type { ShadowUniforms, OccluderUniforms } from '../hex/hexMeshShared';
/**
 * Patch a BodyMaterial's underlying ShaderMaterial with shadow/eclipse code.
 *
 * The function MUST be called before the material is used for the first time
 * (i.e. before the first render). It:
 *   1. Prepends uniform declarations + smootherstep helper to the fragment shader.
 *   2. Injects the shadow GLSL block right before the closing } of main().
 *   3. Wires the uniform { value } objects to the same references used by
 *      ShadowUpdater and OccluderUpdater — no extra per-frame work needed.
 */
export declare function injectPlanetShadows(mat: THREE.ShaderMaterial, occluder: OccluderUniforms, shadow: ShadowUniforms): void;
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