import { BlendAnimator, BlendAnimatorOpts, BlendAnimatorTarget } from './BlendAnimator';
interface Blend1DAnimatorInput {
    position: number;
    offset: number;
    animator: BlendAnimatorTarget;
}
interface Blend1DAnimatorOpts extends BlendAnimatorOpts {
    output: BlendAnimatorTarget;
    inputs: Blend1DAnimatorInput[];
    playbackRatio?: number;
}
/**
 * 1d blending node in animation blend tree.
 * output clip must have blend1D and copy method
 */
declare class Blend1DAnimator extends BlendAnimator {
    position: number;
    private _cacheKey;
    private _cachePosition;
    protected _output?: BlendAnimatorTarget;
    protected _inputs: Blend1DAnimatorInput[];
    constructor(opts?: Partial<Blend1DAnimatorOpts>);
    addInput(position: number, inputAnimator: BlendAnimatorTarget, offset: number): Blend1DAnimatorInput;
    setTime(time: number): void;
    /**
     * Clone a new Blend1D clip
     * @param {boolean} cloneInputs True if clone the input clips
     * @return {clay.animation.Blend1DAnimator}
     */
    _findKey(position: number): number;
}
export default Blend1DAnimator;