wc2 - 大学物理

wc2——大学物理播放幻灯片 | 文档首页文档目录
using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public abstract class State {
    protected Enemy enemy;
    protected Transform player;
    
    public State(Enemy enemy, Transform player) {
        this.enemy = enemy;
        this.player = player;
    }
    
    protected Vector3 getRandomLocation(float radius) {
        return enemy.transform.position + new Vector3(
            Random.Range(radius * -1f, radius * 1f), 
            0f, 
            Random.Range(radius * -1f, radius * 1f));
    }
    
    public abstract State HandleInput();
    public abstract void DoAction();
    public virtual void Enter() {}
    public virtual void Exit() {}
}

// 示例状态实现 - 巡逻状态
public class PatrolState : State {
    private Vector3 targetPosition;
    private float patrolRadius = 10f;
    private float moveSpeed = 3f;
    private float closeEnoughDistance = 1f;
    
    public PatrolState(Enemy enemy, Transform player) : base(enemy, player) {
        // 设置初始巡逻目标点
        targetPosition = getRandomLocation(patrolRadius);
    }
    
    public override void Enter() {
        Debug.Log("Entering Patrol State");
        enemy.SetColor(Color.green); // 假设Enemy有改变颜色的方法
    }
    
    public override void DoAction() {
        // 向目标点移动
        enemy.transform.position = Vector3.MoveTowards(
            enemy.transform.position, 
            targetPosition, 
            moveSpeed * Time.deltaTime);
        
        // 如果到达目标点，获取新的巡逻点
        if (Vector3.Distance(enemy.transform.position, targetPosition) < closeEnoughDistance) {
            targetPosition = getRandomLocation(patrolRadius);
        }
    }
    
    public override State HandleInput() {
        // 如果玩家进入警戒范围，切换到追击状态
        if (Vector3.Distance(enemy.transform.position, player.position) < enemy.alertRange) {
            return new ChaseState(enemy, player);
        }
        
        // 如果敌人生命值低，切换到逃跑状态
        if (enemy.health < enemy.lowHealthThreshold) {
            return new FleeState(enemy, player);
        }
        
        // 否则保持当前状态
        return this;
    }
    
    public override void Exit() {
        Debug.Log("Exiting Patrol State");
    }
}

// 示例状态实现 - 追击状态
public class ChaseState : State {
    private float chaseSpeed = 5f;
    private float attackRange = 2f;
    
    public ChaseState(Enemy enemy, Transform player) : base(enemy, player) {}
    
    public override void Enter() {
        Debug.Log("Entering Chase State");
        enemy.SetColor(Color.red);
    }
    
    public override void DoAction() {
        // 向玩家移动
        enemy.transform.position = Vector3.MoveTowards(
            enemy.transform.position, 
            player.position, 
            chaseSpeed * Time.deltaTime);
        
        // 面向玩家
        enemy.transform.LookAt(player);
    }
    
    public override State HandleInput() {
        // 如果玩家超出追击范围，返回巡逻状态
        if (Vector3.Distance(enemy.transform.position, player.position) > enemy.chaseRange) {
            return new PatrolState(enemy, player);
        }
        
        // 如果在攻击范围内，切换到攻击状态
        if (Vector3.Distance(enemy.transform.position, player.position) < attackRange) {
            return new AttackState(enemy, player);
        }
        
        // 如果生命值低，切换到逃跑状态
        if (enemy.health < enemy.lowHealthThreshold) {
            return new FleeState(enemy, player);
        }
        
        return this;
    }
    
    public override void Exit() {
        Debug.Log("Exiting Chase State");
    }
}

// 示例Enemy类框架
public class Enemy : MonoBehaviour {
    public Transform player;
    public float alertRange = 15f;
    public float chaseRange = 20f;
    public float lowHealthThreshold = 30f;
    public float health = 100f;
    
    private State currentState;
    
    void Start() {
        currentState = new PatrolState(this, player);
        currentState.Enter();
    }
    
    void Update() {
        // 处理状态转换
        State newState = currentState.HandleInput();
        if (newState != currentState) {
            currentState.Exit();
            currentState = newState;
            currentState.Enter();
        }
        
        // 执行当前状态的行为
        currentState.DoAction();
    }
    
    public void SetColor(Color color) {
        // 实现改变颜色的逻辑
        GetComponent<Renderer>().material.color = color;
    }
}