贪吃蛇V1.0

 

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贪吃蛇游戏开发详解

注意以下问题：

1.蛇移动算法。

蛇所有节点存放到数组。每次移动的时候。把节点的坐标设为其前面节点的坐标。最后在把头的坐标往前移动。坐标一直在往前移。

2.随机生成食物时，在蛇蛇身上时候，要重新生成（递归调用）。

3.把游戏区域分成若干个网格，蛇移动距离为网格单元大小，食物生成在网格中。

点击此试玩游戏(csdn服务器太垃圾。多刷新几次)

点击下载源代码

 代码如小：

一：游戏开始

 

package com.lux
...{
    import flash.display.*;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import fl.controls.*;    
 
    public class GameStart extends MovieClip
    ...{ 
        public static var gamestart:MovieClip ;
        private var _score:Number=0; 
         
        //=====游戏所用时间
        private var time:Number ;
        
        public function GameStart()
        ...{     
            super();  
            gamestart = this ; 
            play_btn.addEventListener(MouseEvent.CLICK,playGame); 
        }  
          
        public function playGame(e:MouseEvent):void...{ 
           this.gotoAndStop("two_tag");   
        } 
        public function replayGame(e:MouseEvent):void...{
             score_mc.score_txt.text = "0" ; 
             timer_mc.min_mc.text ="00" ;
             timer_mc.sec_mc.text ="00" ;
             this.gotoAndStop("two_tag");    
        }
        /**//**   
        * 每吃到食物，增加游戏积分   
        */ 
        public function addScore(_score:Number)...{
            this._score+=_score ;  
            score_mc.score_txt.text = this._score.toString();  
        }
              
        public function getScore():Number...{
            return this._score ; 
        }
         
//        public function timerStop():void{
//            timer_mc.remove(); 
//        }
//        
  
        

    }
}

 

二：蛇移动的管理

package com.lux
...{
    import de.polygonal.ds.NullIterator;
    
    import flash.display.MovieClip;
    import flash.events.Event;
    import flash.events.KeyboardEvent;
    import flash.events.TimerEvent;
    import flash.filters.BevelFilter;
    import flash.ui.Keyboard;
    import flash.utils.Timer;

    public class DaShe extends MovieClip ...{ 
        
       //蛇节点数组 
        private var a:Array ;
        //方向 
        private var up:uint =    1 ;
        private var down:uint =  2 ;
        private var left:uint =  3 ;
        private var right:uint = 4 ;
               
        //====保存随机生成的蛇  
        private var _newShe:XiaoShe ;  
               
        //====方向 
        private var _dir:uint ;  
        private var timer:Timer ;   
        
        private var _score:Number=0 ;
    
        public function DaShe() ...{       
            super();    
            this._dir = this.right ; 
            a = new Array();
            //蛇初始化为两条小蛇的长度。               
            var head:XiaoShe = new XiaoShe(30,30);          
            a.push(head);       
            this.addChild(head);  
              
            var head1:XiaoShe = new XiaoShe(head.x-head.width,head.y);
            a.push(head1);      
            this.addChild(head1);       
            
                 
        }        
         
        public function start():void...{ 
             timer = new Timer(100);
             timer.addEventListener(TimerEvent.TIMER,running);
             timer.start();  
                
            //===注册方向控制                  
            this.stage.addEventListener(KeyboardEvent.KEY_DOWN,direction);
             
            //===随机生成新蛇 
            this.initFood();   
                 
        }                     
              
        private function running(e:Event):void...{                                          
            for(var i:uint=a.length-1;i>0;i--)...{ 
                a[i].x =a[i-1].x;    
                a[i].y =a[i-1].y;  
            }    
 
            switch(_dir)...{ 
                case this.up:
                     a[0].y-=this._SPEED;
                     break;
                case this.left:
                     a[0].x-=this._SPEED;
                     break;         
                case this.down:
                     a[0].y+=this._SPEED; 
                     break;       
                case this.right:   
                     a[0].x+=this._SPEED ;                   
            } 
            //==========碰到食物 
            if(isEat())...{ 
                eatFood();      
                 
                
                //增加积分
               // this.addScore();  
               GameStart.gamestart.addScore(1);
            } 
            if(isDead())...{
                this.gameOver() ; 
            }           
                  
        } 
//         
//        private function addScore():void{
//            this._score++;         
//            score_mc.score_txt.text = this._score.toString();
//        }
        
        /** *//**
        * 蛇头是否碰到墙壁 。 
        * 碰上:ture 否则：false 
        */ 
        private function isDead():Boolean