/**
 * Extract meshes from a glTF document.
 * Interleaves vertex data into the engine's format:
 *   Static:  position(3) + normal(3) + uv(2) = 8 floats = 32 bytes
 *   Skinned: position(3) + normal(3) + uv(2) + joints_u8x4(1) + weights(4) = 13 floats = 52 bytes
 */
import type { GltfDocument } from './gltf-parser.js';
import type { ModelMesh } from './types.js';
/**
 * Extract all meshes from the document.
 * Each glTF mesh may have multiple primitives; we flatten them into separate ModelMeshes.
 */
export declare function extractMeshes(doc: GltfDocument): ModelMesh[];
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