import Subverse from './Subverse';
import { Bounds, Optional } from '../types';
import { TimingFunction } from './timing';
export interface UniverseOptions {
    bounds?: Bounds;
    frameRate?: number;
    creationDuration?: number;
    deathDuration?: number;
    creationTimingFn?: TimingFunction;
    deathTimingFn?: TimingFunction;
    onStateChange?: (state: UniverseState, universe: Universe) => void;
}
export declare enum UniverseState {
    Creating = "Creating",
    Created = "Created",
    Dying = "Dying",
    Dead = "Dead"
}
declare class Universe extends Subverse {
    private state;
    private resolveDeath;
    private health;
    private frameRate;
    private creationDuration;
    private creationRate;
    private deathDuration;
    private deathRate;
    private creationTimingFn;
    private deathTimingFn;
    private onStateChange?;
    constructor({ bounds, frameRate, creationDuration, deathDuration, creationTimingFn, deathTimingFn, onStateChange }?: UniverseOptions);
    private setState;
    private applyGrowth;
    private applyDecay;
    setCreationDuration(creationDuration: number): void;
    setDeathDuration(deathDuration: number): void;
    setFrameRate(frameRate: number): void;
    setOnStateChange(onStateChange: Optional<(state: UniverseState, universe: Universe) => void>): void;
    die(): Promise<void>;
    tick(): void;
}
export default Universe;