import { MaterialEffect } from "../../materials/MaterialEffect.js";
import { Trait, World } from "koota";
//#region src/ecs/systems/batchReassignSystem.d.ts
/**
 * Create a batch-reassign system bound to its own scratch state.
 *
 * Each SpriteGroup constructs one. The returned function takes a world
 * + effect-trait map and moves sprites between batches when their sort
 * key (layer or material) changes.
 *
 * Triggered by Changed(SortLayer), Changed(SpriteMaterialRef), or
 * Changed(CameraLayersMask) on batched sprites. If the new
 * (sortLayer, materialId, layers.mask) differs from the current batch's
 * run, removes from old batch and inserts into the correct one.
 *
 * zIndex changes within the same run do NOT require
 * batch movement — Z-offset handles depth sorting.
 *
 * Closes over its own `Changed` subscription + reused dedup Set so each
 * group has clean change-tracking state and the Set is cleared-and-
 * filled instead of allocated per frame.
 */
declare function createBatchReassignSystem(): (world: World, effectTraits: ReadonlyMap<Trait, typeof MaterialEffect>) => void;
//#endregion
export { createBatchReassignSystem };
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