import type { SpriteVFXItem } from './SpriteVFXItem';
import type { CalculateGroup } from '../cal/CalculateGroup';
import type { SpriteItem, SpriteItemRenderInfo } from './SpriteItem';
import type { VFXItem } from '../../player/VFXItem';
import { SpriteMesh } from './SpriteMesh';
import type { Mesh, Texture } from '@predy-js/render-interface';
import type { Composition } from '../../player/Composition';
interface MeshSplit {
    indexStart: number;
    renderInfo: SpriteItemRenderInfo;
    cacheId: string;
    items: SpriteVFXItem[];
    dirty?: boolean;
    indexEnd?: number;
    spriteMesh?: SpriteMesh;
    textures: Texture[];
}
export interface LayerInfo {
    layerToAdd?: SpriteMesh[];
}
export declare class SpriteGroup {
    calculateGroup: CalculateGroup;
    meshSplits: MeshSplit[];
    composition: Composition;
    readonly _items: VFXItem<any>[];
    readonly meshes: Mesh[];
    private readonly _itemsToRemove;
    private readonly _itemsToAdd;
    time: number;
    constructor(composition: Composition);
    resetMeshSplits(): void;
    _check(): void;
    diffMeshSplits(): {
        remove?: Mesh[];
        add?: Mesh[];
        modify?: Mesh[];
        layer?: LayerInfo;
    } | void;
    addMeshSplitsItem(items: VFXItem<any>[], item: VFXItem<any>, splits: MeshSplit[]): MeshSplit[];
    removeMeshSplitsItem(items: VFXItem<any>[], item: SpriteVFXItem, splits: MeshSplit[], itemsToRemove?: VFXItem<any>[]): MeshSplit[];
    combineSplits(items: VFXItem<any>[], itemIndex: number, splits: MeshSplit[]): MeshSplit[];
    getMeshSplits(items: VFXItem<any>[], startIndex?: number, endIndex?: number, init?: boolean): MeshSplit[];
    addItem(vfxItem: VFXItem<any>): void;
    removeItem(item: VFXItem<any>): void;
    getSpriteMesh(item: SpriteItem): SpriteMesh;
    updateTime(dt: number): void;
    updateRenderData(): void;
    destroy(composition: Composition): void;
}
export {};