import { Vector2 } from '@galacean/effects-math/es/core/vector2';
import * as spec from '@galacean/effects-specification';
export declare const keyframeInfo: {
    pointIndexCache: {
        xIndex: number;
        yIndex: number;
    };
    /**
     * 根据不同关键帧类型，获取位于曲线上的点
     */
    getPointInCurve(keyframe: spec.BezierKeyframeValue): Vector2;
    /**
     * 根据不同关键帧类型，获取位于曲线上的点的索引
     */
    getPointIndexInCurve(keyframe: spec.BezierKeyframeValue, res?: {
        xIndex: number;
        yIndex: number;
    }): {
        xIndex: number;
        yIndex: number;
    };
    /**
     * 关键帧左侧是否为缓动类型（否则为线段）
     */
    isLeftSideEase(keyframe: spec.BezierKeyframeValue): keyframe is spec.EaseKeyframeValue | spec.EaseInKeyframeValue | spec.EaseHoldOutKeyframeValue;
    /**
     * 关键帧右侧是否为缓动类型（否则为线段）
     */
    isRightSideEase(keyframe: spec.BezierKeyframeValue): keyframe is spec.EaseKeyframeValue | spec.EaseOutKeyframeValue | spec.EaseHoldInKeyframeValue;
    /**
     * 关键帧左侧是否为缓动类型（否则为线段）
     */
    isKeyframeTypeLeftSideEase(keyframeType: spec.BezierKeyframeType): boolean;
    /**
     * 关键帧右侧是否为缓动类型（否则为线段）
     */
    isKeyframeTypeRightSideEase(keyframeType: spec.BezierKeyframeType): boolean;
    /**
     * 是否为定格进关键帧
     */
    isHoldInKeyframe(keyframe: spec.BezierKeyframeValue): boolean;
    /**
     * 是否为定格出关键帧
     */
    isHoldOutKeyframe(keyframe: spec.BezierKeyframeValue): boolean;
};