export type FramePhase = "windup" | "active" | "recovery" | "cancel";
export interface FrameRange {
    phase: FramePhase;
    from: number;
    to: number;
}
export interface AnimationClip {
    id: string;
    frames: number;
    fps: number;
    ranges: readonly FrameRange[];
    loop?: boolean;
}
export interface AnimationSnapshot {
    clipId: string;
    frame: number;
    elapsedMs: number;
}
export interface AnimationTickResult {
    clipId: string | null;
    frame: number;
    entered: readonly FramePhase[];
    exited: readonly FramePhase[];
    completed: boolean;
}
/** @internal */
export declare function clipDurationMs(clip: AnimationClip): number;
/** @internal */
export declare function frameAtMs(clip: AnimationClip, elapsedMs: number): number;
/** @internal */
export declare function phasesAtFrame(clip: AnimationClip, frame: number): FramePhase[];
/** @internal */
export declare function activeRangeAtFrame(clip: AnimationClip, frame: number): FrameRange | null;
export interface AnimationState {
    play(clipId: string): void;
    stop(): void;
    tick(dtSeconds: number): AnimationTickResult;
    current(): AnimationSnapshot | null;
    phases(): readonly FramePhase[];
    inPhase(phase: FramePhase): boolean;
    isActive(): boolean;
    canCancel(): boolean;
    activeWindowMs(): {
        from: number;
        to: number;
    } | null;
}
export interface AnimationStateConfig {
    clips: readonly AnimationClip[];
}
/** @internal */
export declare function createAnimationState(config: AnimationStateConfig): AnimationState;