【跟我一起学Unity3D】做一个2D的90坦克大战之导演以及道具系统

做游戏我还是习惯用一个导演类来控制游戏的进程，比如游戏的开始和结束，游戏的AI的产生，游戏的地图的绘制等等都放置在这么一个导演类里面。 然后这个导演类我把它放在MainCamera里面，作为它的组件。

首先在Start里面，需要初始化一些游戏的数据，例如读取地图，初始化AI等

    void Start()
    {
		//初始化数据
        m_iAICurTankCount = 0;
        m_iAITankCount = 1;
        m_iKillAICount = 0;
        m_iDirection = 0;
        m_iMyLife = 3;
        m_bIsLose = false;
        m_vInstPosition = new Vector3(0, 4.2f, 1);
		
		//读取地图
        m_sXmlPath = Application.dataPath + "/Map/map_1.xml";

        //read map from xml
        ReadFromXml();
        m_gMyTank.GetComponent<CMyTank>().m_fMoveSpeed = m_iMyMoveSpeed;

		//创建AI
        while (m_iAICurTankCount < m_iAITankCount)
        {
            StartCoroutine(CreateAI(1.0f));
        }

        //每隔30秒开放置一次道具
        InvokeRepeating("CreateProp", 15, 30);
    }

    IEnumerator CreateAI(float waitTime)
    {
        Vector3 temp_position = m_vInstPosition + RandDirection();
        GameObject CreateAIAnimation = Instantiate(m_CreateAIAnimation, temp_position, Quaternion.identity) as GameObject;
        Destroy(CreateAIAnimation, waitTime);

        ++m_iAICurTankCount;

        yield return new WaitForSeconds(waitTime);
		
<span style="white-space:pre">	</span>//start：这一段语句将在延迟waitTime秒后执行
        GameObject temp_AI = Instantiate(m_gAITank, temp_position, Quaternion.identity) as GameObject;
        temp_AI.GetComponent<CAITank>().m_fMoveSpeed = m_iAIMoveSpeed;
	//end：这一段语句将在延迟waitTime秒后执行
    }

    // 随机生成一个方向
    Vector3 RandDirection()
    {
        m_iDirection = ++m_iDirection % 3;
        Vector3 vec = Vector3.left * 0;
        switch (m_iDirection)
        {
            case 0:
                vec = Vector3.right * 4.2f;
                break;
            case 1:
                vec = Vector3.left * 4.2f;
                break;
            case 2:
                vec = Vector3.left * 0;
                break;
        }
        return vec;
    }

    void CreateProp()
    {
        GameObject Temp = Instantiate(m_gProp, RandPosition(), Quaternion.identity) as GameObject;
        Destroy(Temp, 20.0f);
    }

    Vector3 RandPosition()
    {
        int temp_x = UnityEngine.Random.Range(-7, 7);
        int temp_y = UnityEngine.Random.Range(-7, 7);
        return new Vector3(temp_x * 0.6f, temp_y * 0.6f, -2.0f);
    }

道具我只做了一个道具，就是炸弹，得到道具之后，所有AI会爆炸。这个道具的实现我单独做了一个脚本，具体实现如下：

using UnityEngine;
using System.Collections;

public class CProp : MonoBehaviour {

	void Start () {
	
	}
	
	void Update () {
	
	}

    void OnCollisionEnter2D(Collision2D coll)
    {
        Debug.Log(" OnCollisionEnter2D : " + coll.gameObject.name);
        //玩家吃到了道具
        if(coll.gameObject.name == "MyTank")
        {
            Destroy(this.gameObject);
            GameObject[] ais = GameObject.FindGameObjectsWithTag("AITank");
            foreach(GameObject ai in ais)
            {
                Destroy(ai);
                Camera.main.GetComponent<CCamera>().Boom();
            }
        }
    }
}

读取地图这一块已经在上上篇博客中讲过了，就不说了。