import { AdofaiEvent, ActionData, Tile, ParseProgressEvent } from './interfaces';
/**
 * 装饰类事件的 eventType 列表。
 * 这些事件在标准格式中应位于 decorations 数组，
 * 但早期版本的谱面可能将它们放入 actions 数组，因此需要 fallback 处理。
 */
export declare const DECORATION_EVENT_TYPES: readonly string[];
export declare function isDecorationEvent(event: {
    eventType?: string;
} | null | undefined): boolean;
export declare function normalizeAngle(v: number): number;
export declare function resolveAngleOffset(v: number): number | null;
export interface AngleState {
    value: number;
}
export declare function parseAngle(agd: number[], i: number, angleDir: AngleState, isTwirl: number): number;
export declare function parseChangedAngle(agd: number, i: number, angleDir: AngleState, isTwirl: number, tiles: Tile[]): number;
export declare function filterActionsByEventType(tiles: Tile[], eventType: string): {
    index: number;
    action: ActionData;
}[];
export declare function getActionsByIndex(tiles: Tile[], eventType: string, index: number): {
    count: number;
    actions: ActionData[];
};
export interface CreateTilesOptions {
    angleData: number[];
    actions: AdofaiEvent[];
    decorations: AdofaiEvent[];
}
export interface CreateTilesCallbacks {
    onProgress: (stage: ParseProgressEvent['stage'], current: number, total: number, data?: ParseProgressEvent['data']) => void;
    onTwirl: (count: number) => void;
    getTwirl: () => number;
}
export declare function createTiles(xLength: number, opt: CreateTilesOptions, cbs: CreateTilesCallbacks): Promise<Tile[]>;
export declare function changeAngles(tiles: Tile[]): Tile[];
export declare function flattenAngleDatas(tiles: Tile[]): number[];
export declare function flattenActionsWithFloor(tiles: Tile[]): AdofaiEvent[];
export declare function flattenDecorationsWithFloor(tiles: Tile[]): AdofaiEvent[];
export interface AngleDataRef {
    [index: number]: number;
    length: number;
}
export declare function calculateTilePositions(angleData: number[], tiles: Tile[], actions: AdofaiEvent[], emitProgress: (stage: string, current: number, total: number, data?: any) => void): number[][];
export declare function precomputePositions(angleData: number[], totalTiles: number, actions: AdofaiEvent[]): {
    positions: [number, number][];
    angles: number[];
};