Unity3D塔防游戏基本功能实现

塔防游戏是我们熟知的一种游戏类型，接下来讲解它具体功能的实现

1.敌人的出生点和终点

• 分别创建两个空物体，分别为起点和终点
• 随后通过导航网格进行烘培
• 随后调用脚本，代码如下

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class EnemyManager : MonoBehaviour
  {
      // Start is called before the first frame update
      public GameObject EnemyPre;
      private float timer = 0;
  
      // Update is called once per frame
      void Update()
      {
          timer += Time.deltaTime;
          if(timer>2)
          {
              timer = 0;
              Instantiate(EnemyPre, transform.position, transform.rotation);
          }
      }
  }
  

2.敌人

• 敌人拥有血量，在接触到终点后消失
• 脚本代码如下

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  using UnityEngine.AI;
  
  public class EnemyControl : MonoBehaviour
  {
      private Transform EndPoint;
      private NavMeshAgent agent;
      private int hp = 10;//生命值
      // Start is called before the first frame update
      void Start()
      {
          EndPoint = GameObject.Find("EndPoint").transform;
          agent = GetComponent<NavMeshAgent>();
          agent.SetDestination(EndPoint.position);
      }
  
  
      // Update is called once per frame
      void Update()
      {
          //计算敌人和终点的距离来判断敌人是否要销毁
          float dis = Vector3.Distance(transform.position, EndPoint.position);
          if(dis<0.5f)
          {
              Debug.Log("敌人跑掉了");
              Destroy(gameObject);
          }
      }
      public void GetDamage()
      {
          hp--;
          if(hp<=0)
          {
              Destroy(gameObject);
  
          }
      }
  }

3.塔的放置

• 设置一块区域为放置区，专门放置炮台，敌人不能经过放置区
• 脚本代码如下

  using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class FloorControl : MonoBehaviour
  {
      // Start is called before the first frame update
      public GameObject TowerPre;
      //在地板上单击鼠标左键调用
      private void OnMouseUpAsButton()
      {
          if(transform.childCount==0)
          {
              GameObject tower = Instantiate(TowerPre, transform.position, Quaternion.identity);
              tower.transform.SetParent(transform);
          }
      }
  
  }

4.子弹轨迹

• 发射后一直跟着敌人，直到敌人死亡或消失，随后自己消失
• 脚本代码如下

• using System.Collections;
  using System.Collections.Generic;
  using UnityEngine;
  
  public class BulletControl : MonoBehaviour
  {
      public EnemyControl enemy;
  
      // Update is called once per frame
      void Update()
      {
          if(enemy!=null)
          {
              float dis = Vector3.Distance(transform.position, enemy.transform.position);
              if(dis>0.5f)
              {
                  transform.LookAt(enemy.transform);
                  //向前移动
                  transform.Translate(Vector3.forward * 3 * Time.deltaTime);
              }
              else
              {
                  enemy.GetDamage();
                  Destroy(gameObject);
              }
          }
          else
          {
              Destroy(gameObject);
          }
      }
  }