我正在为我的学习项目写一个脚本，这是一个3D火球手机游戏副本。
我的任务是实现一个球从障碍物弹回的机制。有更简单的方法，但是，不幸的是，我必须使用附件中的一个。当我尝试使用方法Evaluate时，我有这样的日志
1在JB附加条款中为：
无法解析符号"Evaluate"
1.在统一中它是：
资源\脚本\物理\定向反弹. cs（56，48）：错误CS1061："Animation"不包含"Evaluate"的定义，并且找不到接受"Animation"类型的第一个参数的可访问扩展方法"Evaluate"（是否缺少using指令或程序集引用？）

using System.Collections;
using Coroutines;
using Structures;
using UnityEngine;

namespace Physics
{
    [System.Serializable]
    public class DirectionalBouncePreferences
    {
        public float Duration;
        public float Height;
        public Animation Trajectory;

        public DirectionalBouncePreferences(float duration, float height, Animation trajectory)
        {
            Duration = duration;
            Height = height;
            Trajectory = trajectory;
        }
    }

    public class DirectionalBounce
    {
        private readonly Transform _bouncer;
        private CoroutineExecutor _coroutineExecutor;
        private readonly DirectionalBouncePreferences _preferences;

        public DirectionalBounce(Transform bouncer, CoroutineExecutor coroutineExecutor, DirectionalBouncePreferences preferences)
        {
            _bouncer = bouncer;
            _coroutineExecutor = coroutineExecutor;
            _preferences = preferences;
        }

        public void BounceTo(Vector3 target, Vector3 startPosition) =>
            _coroutineExecutor.Start(InerpolatePositionTo(target, startPosition));

        private IEnumerator InerpolatePositionTo(Vector3 target, Vector3 startPosition)
        {
            var timer = new UnityTimer();
            timer.Start(_preferences.Duration);

            while (timer.IsTimeUp == false)
            {
                float t = timer.ElapsedTimePercent;
                Vector3 newPosition = CalculatePosition(target, startPosition, t);
                _bouncer.transform.position = newPosition;
                yield return null;
            }
        }

        private Vector3 CalculatePosition(Vector3 target, Vector3 startPosition, float t)
        {
            return Vector3.Lerp(startPosition, target, t) +
                   Vector3.up * _preferences.Trajectory.Evaluate(t) *
    _preferences.Height;
        }
    }
}
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