使用unity3d对于一些可视化强迫者来说,是一个不错的选择,但unity3d没有cocos2d的action管理机制,比如cocos2dx的CCMoveTo,CCScale等action,所以笔者通过封装action管理来实现类似cocos2dx的actionmanager。
首先需要写一个ActionManager来创建、更新、移除所有action。编写代码实现如下:
using UnityEngine;
using System.Collections;
using System;
public class ActionManager : MonoBehaviour {
private ArrayList actionList = null;
private static ActionManager instance = null;//创建一个ActionManager单例
public static ActionManager Instance
{
get
{
instance = UnityEngine.Object.FindObjectOfType(typeof(ActionManager)) as ActionManager;
if (instance == null)
{
GameObject obj = new GameObject("ActionManager");//每个场景都有一个ActionManager的gameobject来管理所有Action
instance = obj.AddComponent(typeof(ActionManager)) as ActionManager;
instance.InitActionList();
}
return instance;
}
}
public void InitActionList()
{
actionList = new ArrayList();//初始化所有Action容器
}
void Update () {
for (int i = 0; i < actionList.Count;i++ )
{
BasicAction action = (BasicAction)actionList[i];
action.Update();
if(action.bCompleted)//bComplete变量用于判断action是否回收
{
actionList.RemoveAt(i);
i--;
}
}
}
public void AddMoveByAction(GameObject obj, Vector3 moveDirection, float moveDistance,Space relative, float useTime,Action cb)
{
actionList.Add(new MoveBy(obj, moveDirection, moveDistance,relative, useTime, cb));
}
public void AddMoveToAction(GameObject obj, Vector3 targetPos, Space relative, float useTime, Action cb)
{
actionList.Add(new MoveTo(obj,targetPos, relative, useTime, cb));
}
public void RemoveActionByGameObject(GameObject obj)//通过gameobject来移除action
{
foreach (BasicAction action in actionList)
{
if (action.myObj.Equals(obj))
{
actionList.Remove(action);
break;
}
}
}
public void RemoveAllAction()//清除所有action
{
actionList.Clear();
}
void OnDestroy()
{
actionList.Clear();
}
在所有action中具有共同的成员变量,所以需要编写基类函数来减少共同的成员变量和函数,编写action的基类BaseAction:
using UnityEngine;
using System.Collections;
public class BasicAction
{
public bool bCompleted = false;//用于判断action是否完成
public GameObject myObj;//action作用的gameobject
public BasicAction(){}
public virtual void Update(){}//update函数,需要子类重写
}
写完基类,就能入手一个action了,以下是一个比较简单的moveby action:
using UnityEngine;
using System.Collections;
using System;
public class MoveBy : BasicAction { //通过具体距离和方向移动
/*
* moveDirection 移动方向
* moveDistance 移动距离
* useTime 使用的时间,单位秒
*/
private Vector3 speed;
private float time;
//private float deltaTime = 0;
private Space myRelative;
private Action mcb=null;
private float deltaDis = 0,speedLen,moveDistance;
private Vector3 targetPos;
public MoveBy(GameObject obj,Vector3 moveDirection,float moveDistance,Space relative,float useTime,Action cb)
{
this.myObj=obj;
this.mcb = cb;
this.myRelative = relative;
this.moveDistance = moveDistance;
this.time = useTime;
moveDirection.Normalize();
if (myRelative == Space.World)
this.targetPos = this.myObj.transform.position + (moveDirection * moveDistance);
else
this.targetPos = this.myObj.transform.localPosition + (moveDirection * moveDistance);
useTime *= (1 / 0.02f);
speed = (moveDirection * moveDistance) / useTime;
speedLen = Vector3.Distance(speed,Vector3.zero);
}
public override void Update()
{
if(myObj==null)
{
bCompleted = true;
return;
}
deltaDis += speedLen;
if (deltaDis >= moveDistance)
{
myObj.transform.localPosition = targetPos;//确保gameobject到达目标点
if (mcb != null)//完成action后可回调callback
mcb();
bCompleted = true;//如果完成当前action,把action标记可以回收
}
else
{
if (myRelative == Space.World)
myObj.transform.position = new Vector3(myObj.transform.position.x + speed.x, myObj.transform.position.y + speed.y, myObj.transform.position.z + speed.z);
else
myObj.transform.localPosition = new Vector3(myObj.transform.localPosition.x + speed.x, myObj.transform.localPosition.y + speed.y, myObj.transform.localPosition.z + speed.z);
}
}
}
使用例子:
ActionManager.Instance.AddMoveByAction(GameObject obj, Vector3 moveDirection, float moveDistance,Space relative, float useTime,Action cb)
以上时一个比较简单的action封装过程,你也可以通过实现多种action封装,比如moveto,rotationto,rotationby等等。
(转载时请注明出处,from 博客园:HemJohn)