[游戏开发]unity 动画正播放倒播（animation)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class door : MonoBehaviour
{
? ? // ?private Transform door_transform;
? ? public GameObject AnimationObj;
? ?private Animation animation_A;
? ? // Start is called before the first frame update
? ? void Start()
? ? {
? ? ? ? animation_A = gameObject.GetComponent<Animation>();

? ? }

? ? void OnTriggerEnter(Collider coll)
? ? {
? ? ? ? if (coll.gameObject.name == "Student")
? ? ? ? {

? ? ? ? ? ? //AnimationObj.GetComponent<Animation>()["OpenDoorAni"].time = AnimationObj.GetComponent<Animation>()["OpenDoorAni"].clip.length;
? ? ? ? ? ? //AnimationObj.GetComponent<Animation>()["OpenDoorAni"].speed = 1.0f;
? ? ? ? ? ? //AnimationObj.GetComponent<Animation>().CrossFade("OpenDoorAni");
? ? ? ? ? ? ? ?animation_A.Play("OpenDoorAni");
? ? ? ? }
? ? }
? ? void OnTriggerExit(Collider coll)
? ? {
? ? ? // ?animation01["OpenDoorAni"].time = animation01["OpenDoorAni"].clip.length;

? ? ? ? ? ? if (coll.gameObject.name == "Student")
? ? ? ? {

? ? ? ? ? ? AnimationObj.GetComponent<Animation>()["OpenDoorAni"].time = AnimationObj.GetComponent<Animation>()["OpenDoorAni"].clip.length;
? ? ? ? ? ? AnimationObj.GetComponent<Animation>()["OpenDoorAni"].speed = -1.0f;
? ? ? ? ? ? AnimationObj.GetComponent<Animation>().CrossFade("OpenDoorAni");
? ? ? ? }
? ? }
}