import type { TSLUintNode, TSLVec3Node } from '../types/tsl.js';
import type { SplatSHReadNodes } from './SplatSHResource.js';
/**
 * Build a TSL spherical-harmonics contribution node for one Gaussian splat.
 *
 * @param {SplatSHCoefficientReader|null|undefined} shReadNodes SH coefficient reader.
 * @param {import('../types/tsl.js').TSLUintNode} splatIdx Source splat index.
 * @param {import('../types/tsl.js').TSLVec3Node} viewDir Local-space view direction.
 * @param {number} shDegree Evaluated degree from 0 to 3.
 * @returns {import('../types/tsl.js').TSLVec3Node} View-dependent RGB delta.
 */
export declare function buildSplatSHContribution(shReadNodes: SplatSHReadNodes | null | undefined, splatIdx: TSLUintNode, viewDir: TSLVec3Node, shDegree: number): TSLVec3Node;