export interface SpringOptions {
    max?: number;
    damp?: number;
    springiness?: number;
}
export declare class Spring {
    x: number;
    ax: number;
    dx: number;
    tx: number;
    protected _options: Required<SpringOptions>;
    constructor(options?: SpringOptions);
    update(): void;
    reset(): void;
    get max(): number;
    set max(value: number);
    get damp(): number;
    set damp(value: number);
    get springiness(): number;
    set springiness(value: number);
}
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