/**
 * Triplanar texture mapping for MeshPhysicalMaterial.
 *
 * Replaces standard UV-based texture sampling with model-space triplanar
 * projection via `material.onBeforeCompile`. Eliminates seams on curved
 * surfaces (cylinders, cones, etc.) and maintains uniform texture scale
 * regardless of object proportions.
 *
 * All coordinates are in **model space** to match the geometry's bounding box.
 * `transformed` (model-space position) and `objectNormal` (model-space normal)
 * are used — NOT the view-space `transformedNormal`.
 *
 * NOTE: `onBeforeCompile` receives shaders BEFORE `#include` resolution.
 * Therefore we replace `#include <chunk_name>` directives with inline GLSL
 * that uses triplanar sampling, rather than replacing expanded texture2D calls.
 *
 * Handles: map, normalMap, roughnessMap, metalnessMap, emissiveMap, aoMap,
 *          clearcoatNormalMap, alphaMap.
 */
import * as THREE from "three";
/**
 * Apply triplanar texture mapping to a MeshPhysicalMaterial.
 *
 * Modifies the material's shader via `onBeforeCompile` so that all texture
 * lookups use model-space triplanar projection instead of UV coordinates.
 * The material should be a **clone** (not shared) because `onBeforeCompile`
 * and `customProgramCacheKey` are set on it.
 *
 * Bounding box of the geometry determines coordinate normalization: the
 * texture tiles once across the largest dimension with uniform scale,
 * preserving aspect ratio. `textureRepeat` on the material's textures
 * (if set) is respected via the triplanarRepeat uniform.
 *
 * @param material - Material clone to modify
 * @param geometry - Geometry for bounding box computation
 */
export declare function applyTriplanarMapping(material: THREE.MeshPhysicalMaterial, geometry: THREE.BufferGeometry): void;