import { Primitive, PrimitiveTarget } from '@gltf-transform/core';
/**
 * Sorts skinning weights from high to low, for each vertex of the input
 * {@link Primitive} or {@link PrimitiveTarget}, and normalizes the weights.
 * Optionally, uses the given 'limit' to remove least-significant joint
 * influences such that no vertex has more than 'limit' influences.
 *
 * Most realtime engines support a limited number of joint influences per vertex,
 * often 4 or 8. Sorting and removing the additional influences can reduce file
 * size and improve compatibility.
 *
 * Example:
 *
 * ```javascript
 * import { sortPrimitiveWeights } from '@gltf-transform/functions';
 *
 * const limit = 4;
 * for (const mesh of document.getRoot().listMeshes()) {
 * 	for (const prim of mesh.listPrimitives()) {
 * 		sortPrimitiveWeights(prim, limit);
 * 	}
 * }
 * ```
 *
 * @param prim Input, to be modified in place.
 * @param limit Maximum number of joint influences per vertex. Must be a multiple of four.
 */
export declare function sortPrimitiveWeights(prim: Primitive | PrimitiveTarget, limit?: number): void;