Object-oriented implementation of a simple version of Super Mario mini-game-JS Tutorial-php.cn

Object-oriented implementation of a simple version of Super Mario mini-game

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Release： 2017-10-14 10:15:21

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Using object-oriented thinking to design a simplified version of Super Mario game characters (schematic diagram)
Object-oriented implementation of a simple version of Super Mario mini-game

Analysis of the game:
(1) See how to control mario’s position through buttons
(2) Design related objects (mario, obstacles, etc.)

Small game functions:
(1) Control mario’s movement through the keyboard;
(2) There will be a prompt message when mario hits the boundary ;
(3) Mario will prompt a message when he finds the treasure;

Emphasize the key points and provide the source code:
html code:

<!DOCTYPE html>
<html>
<head>
<link href="mario.css" type="text/css" rel="stylesheet"/>
<script language="javascript" type="text/javascript">
    function Mario(){
        this.x=0;        
        this.y=0;   
//移动 0->上 1->左 2->右 3->下
    this.move=function(direct){
        switch(direct){            
                        case 0:                //这里为了改变img的left和top，我们需要得到img元素(对象)
                var mymario=document.getElementById(&#39;mymario&#39;);                
                var top=mymario.style.top;
                top=parseInt(top.substr(0,top.length-2));                
                var left=mymario.style.left;
                left=parseInt(left.substr(0,left.length-2));
                newtop=top-10;                
                if(newtop==-10){
                    window.alert("已到达上边界");
                }                else{
                    mymario.style.top=(newtop)+"px";
                }                if(newtop==460&&left==610){
                    window.alert("mario找到宝箱啦")
                }                break;            
                case 1:                
                var mymario=document.getElementById(&#39;mymario&#39;);                
                var left=mymario.style.left;
                left=parseInt(left.substr(0,left.length-2));                
                var top=mymario.style.top;
                top=parseInt(top.substr(0,top.length-2));
                newleft=left-10;                
                if(newleft==-10){
                    window.alert("已到达左边界")
                }                else{
                    mymario.style.left=(left-10)+"px";              
                }                if(top==400&&newleft==660){
                    window.alert("mario找到宝箱啦")
                }                break;            
                case 2:                
                var mymario=document.getElementById(&#39;mymario&#39;);                
                var left=mymario.style.left;
                left=parseInt(left.substr(0,left.length-2));                
                var top=mymario.style.top;
                top=parseInt(top.substr(0,top.length-2));
                newleft=left+10;                
                if(newleft==760){
                    window.alert("已到达右边界")
                }                else{
                mymario.style.left=(left+10)+"px";  
                }                if(top==400&&newleft==570){
                    window.alert("mario找到宝箱啦")
                }                break;            
                case 3:                
                var mymario=document.getElementById(&#39;mymario&#39;);                var top=mymario.style.top;
                top=parseInt(top.substr(0,top.length-2));                
                var left=mymario.style.left;
                left=parseInt(left.substr(0,left.length-2));
                newtop=top+10;                
                if(newtop==450){
                    window.alert("已到达下边界");
                }                else{
                    mymario.style.top=(top+10)+"px";
                }                if(newtop==360&&left==610){
                    window.alert("mario找到宝箱啦")
                }                break;
        }
    }
    }    //创建Mario对象
    var mario=new Mario();//全局函数     
    也可以去掉这个全局函数直接在onclick调用对象方法mario.move();
    function marioMove(direct){
        switch(direct){            
        case 0:
                mario.move(direct);                
                break;            
        case 1:
                mario.move(direct);                
                break;            
        case 2:
                mario.move(direct);                
                break;            
        case 3:
                mario.move(direct);                
                break;
        }
    }
    
    </script>
        <title></title>
        </head>
        <body>
        <div class="gamediv">
        <img id="mymario" style="width:50px;
            left:30px;
            top:30px;
            position:absolute;
            " src="mario1.gif"/>
        <img style="width:70px;
            left:600px;
            top:400px;
            position:absolute;
            " src="box.png"/>
        </div>
        <table border="1px" class="controlcenter">
        <tr><td colspan="3">游戏键盘</td></tr>
        <tr><td>**</td><td><input type="button" value="↑" onclick="marioMove(0)"/></td><td>**</td></tr>
        <tr><td><input type="button" value="←" onclick="marioMove(1)"/></td><td>**</td><td><input type="button" value="→" onclick="marioMove(2)"/></td></tr>
        <tr><td>**</td><td><input type="button" value="↓" onclick="marioMove(3)"/></td><td>**</td></tr>
        </table>
        </body>
        </html>

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.gamep {
    width:800px;
    height:500px;
    background-color:pink;
    position:absolute;
    margin-left:0px;
}
/*表格样式*/
    .controlcenter {
    width:200px;
    height:100px;
    border:1px solid silver;
    text-align:center;
    margin-top:530px;
    position:absolute;
}

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