import Vector2 from '../math/Vector2';
import { BlendAnimator, BlendAnimatorOpts, BlendAnimatorTarget } from './BlendAnimator';
interface Blend2DAnimatorInput {
    position: Vector2;
    offset: number;
    animator: BlendAnimatorTarget;
}
interface Blend2DAnimatorOpts extends BlendAnimatorOpts {
    output: BlendAnimatorTarget;
    inputs: Blend2DAnimatorInput[];
    loop?: boolean;
    playbackRatio?: number;
}
/**
 * 1d blending node in animation blend tree.
 * output clip must have blend1D and copy method
 */
declare class Blend2DAnimator extends BlendAnimator {
    position: Vector2;
    protected _output?: BlendAnimatorTarget;
    protected _inputs: Blend2DAnimatorInput[];
    private _cacheTriangle?;
    private _triangles?;
    constructor(opts?: Partial<Blend2DAnimatorOpts>);
    addInput(position: Vector2, inputAnimator: BlendAnimatorTarget, offset: number): Blend2DAnimatorInput;
    setOutput(output: BlendAnimatorTarget): void;
    setTime(time: number): void;
    /**
     * Clone a new Blend1D clip
     * @param {boolean} cloneInputs True if clone the input clips
     * @return {clay.animation.Blend2DAnimator}
     */
    private _updateTriangles;
    private _findTriangle;
}
export default Blend2DAnimator;