js menulis kemahiran mini game_javascript 'Ular'.-tutorial js-php.cn

Kenangan zaman kanak-kanak Ular, saya baru belajar hari ini, jadi saya baru buat satu, jadi saya belajar juga, ilmu yang perlu saya kuasai:

　1. Kemahiran dalam fungsi JS,

2. Aplikasi tatasusunan JS,

3. Mempelajari sebahagian kecil JS dan AJAX

4. Aplikasi splice, shift dan fungsi lain dalam JS,

Itu pada asasnya. Ini adalah perkara utama:
Halaman hujung hadapan boleh dibentangkan dengan sendirinya. Saya menyediakan reka letak saya sendiri di sini:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">                     
<head>
  <meta http-equiv="Content-Type" content="text/html;charset=UTF-8">
  <title>贪吃蛇</title>
  <link rel="stylesheet" type="text/css" href="./css.css">
  <script type="text/javascript" src="./jquery-1.7.2.min.js"></script>
  <script type="text/javascript" src="./js.js"></script>
</head>
<body>
  <div id="info">  
    <div id="score">0</div>
    <form action="" id="form" name="form">
      <input type="radio" name='time' value="500" checked='checked'/>简单
      <input type="radio" name='time' value="300"/>中等
      <input type="radio" name='time' value="150"/>高级
      <input type="radio" name='time' value="50"/>神速
      <input type="button" value="开始" class="button" id="start"/>
      <input type="button" value="重玩" class="button" id="res"/> 
    </form>
      
  </div>
  <div id="main">
    <div id="home">
      <!--<div style="background:url(./images/snake0.png) no-repeat;"></div>
      <div style="background:url(./images/snake1.png) no-repeat; left:20px;"></div>
      <div style="background:url(./images/snake2.png) no-repeat; left:40px;"></div>
      <div style="background:url(./images/snake3.png) no-repeat; left:60px;"></div>-->
    </div>
    <div class="wall left"></div>
    <div class="wall right"></div>
    <div class="wall top"></div>
    <div class="wall bottom"></div>
  </div>                            
</body> 
</html>

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Berikut ialah kod css:

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*{padding: 0px; margin: 0px;font-size: 12px}
body{background: #ccc}
input.button{
  width: 60px;
  cursor: pointer;
}
#info{
  width: 540px;
  height: 30px;
  margin: 30px auto 5px;
  line-height: 30px;
}
#score{
  width: 73px;
  height: 28px;
  padding-left: 64px;
  background: url(./images/score.png) no-repeat;
  float: left;
  font-size: 14px;
  font-weight: 700;
  font-style:italic;
  font-family: '微软雅黑';
}
#form{
  float: right;
}
#form input{
  vertical-align: middle;
  margin-right: 5px;
}
#main{
  width: 540px;
  height: 500px;
  margin: 0 auto;
  position: relative;
  /*background: #71a000*/
  
}
#main div{
  width: 20px;
  height: 20px;
  position: absolute;
}
#main #home{
  width: 500px;
  height: 460px;
  left: 20px;
  top: 20px;
  position: relative;
  background: url(./images/background.jpg) no-repeat;
}
#main #home div{
  position: absolute;
}
#main div.wall{
  width: 540px;
  height: 20px;
  background: url("./images/div.jpg") repeat-x;
  position: absolute;
}
#main div.top{
  left:0px;
  top:0px;
}
  
#main div.bottom{
  left:0px;
  top:480px;
}
#main div.left{
  width: 20px;
  height: 500px;
  background: url(./images/div.jpg) repeat-y;
  left:0px;
  top:0px;
}
#main div.right{
  width: 20px;
  height: 500px;
  background: url(./images/div.jpg) repeat-y;
  left:520px;
  top:0px;
}
  
.l{
  -moz-transform:rotate(0deg);  
  -o-transform:rotate(0deg);
  -webkit-transform:rotate(0deg);
  transform:rotate(0deg);
  /* IE8+ - must be on one line, unfortunately */ 
  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=1, M12=0, M21=0, M22=1, SizingMethod='auto expand')";   
  /* IE6 and 7 */
  filter: progid:DXImageTransform.Microsoft.Matrix(      M11=1,      M12=0,      M21=0,      M22=1,      SizingMethod='auto expand');
}
.t{
  -moz-transform:  rotate(90deg);   -o-transform:   rotate(90deg);   -webkit-transform: rotate(90deg);   transform:     rotate(90deg);
  /* IE8+ - must be on one line, unfortunately */  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=-1.8369701987210297e-16, M12=-1, M21=1, M22=-1.8369701987210297e-16, SizingMethod='auto expand')";   /* IE6 and 7 */  filter: progid:DXImageTransform.Microsoft.Matrix(      M11=-1.8369701987210297e-16,      M12=-1,      M21=1,      M22=-1.8369701987210297e-16,      SizingMethod='auto expand');
  
}
.r{
  -moz-transform:  rotate(180deg);   -o-transform:   rotate(180deg);   -webkit-transform: rotate(180deg);   transform:     rotate(180deg);
   /* IE8+ - must be on one line, unfortunately */  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=-1, M12=1.2246467991473532e-16, M21=-1.2246467991473532e-16, M22=-1, SizingMethod='auto expand')";   /* IE6 and 7 */  filter: progid:DXImageTransform.Microsoft.Matrix(      M11=-1,      M12=1.2246467991473532e-16,      M21=-1.2246467991473532e-16,      M22=-1,      SizingMethod='auto expand');
  
}
.b{
  -moz-transform:  rotate(270deg);   -o-transform:   rotate(270deg);   -webkit-transform: rotate(270deg);   transform:     rotate(270deg);
  /* IE8+ - must be on one line, unfortunately */  -ms-filter: "progid:DXImageTransform.Microsoft.Matrix(M11=6.123233995736766e-17, M12=1, M21=-1, M22=6.123233995736766e-17, SizingMethod='auto expand')";   /* IE6 and 7 */  filter: progid:DXImageTransform.Microsoft.Matrix(      M11=6.123233995736766e-17,      M12=1,      M21=-1,      M22=6.123233995736766e-17,      SizingMethod='auto expand');
    
}

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Fail awam JS

var home = $('#home');
  var snakeArr = [];
  var direcation = 'l';
  var speed = 0;
  var timer = '';
  //460/20
  var rows = 23;
  var cols = 25;
  var die = false;      //用于判断是否game over
  var food = [];
  var sorce = 0;       //得分的显示

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Pertama sekali, jika anda ingin mempunyai ular, anda mesti mencipta ular,

for( var i=0; i<4; i++ ){
    //var snakeDiv = document.createElement("div");
    //snakeDiv.style = 'background:url(./images/snake' + i + '.png) no-repeat;';
    var snakeDiv = $('<div style="background:url(./images/snake' + i + '.png) no-repeat;z-index:999"></div>');
    home.append(snakeDiv);
    snakeArr[i] = {r : 10, c : 10 + i, div : snakeDiv, d : direcation};
    setPosition(snakeArr[i]); 
  }

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Selepas ada ular, ia adalah semula jadi untuk bergerak:

function move(){
    var timer = setInterval(function(){
    for( var i=snakeArr.length -1; i>0; i-- ){
      snakeArr[i].c = snakeArr[i-1].c;
      snakeArr[i].r = snakeArr[i-1].r;
      snakeArr[i].d = snakeArr[i-1].d;
      }
  
      switch(direcation){
      case 'l' :
        snakeArr[0].c--;
        snakeArr[0].d = 'l';
        break;
  
      case 'r' :
        snakeArr[0].c++;
        snakeArr[0].d = 'r';
        break;
  
      case 't' :
        snakeArr[0].r--;
        snakeArr[0].d = 't';
        break;
  
      case 'b' :
        snakeArr[0].r++;
        snakeArr[0].d = 'b';
        break;
    }
  
    //snake的方向控制
    $(window).keydown(function(event){
      switch(event.keyCode){
        case 37 :
          direcation = 'l';
          break;
  
        case 38 :
          direcation = 't';
          break;
  
        case 39 :
          direcation = 'r';
          break;
  
        case 40 :
          direcation = 'b';
          break;
      }
    });
  
      //snake事故
      //1. snake撞墙
      if( snakeArr[0].c < 0 || snakeArr[0].r < 0 || snakeArr[0].c >= cols || snakeArr[0].r >= rows ){
          clearInterval(timer);
          die = true;
          alert('GAME OVER');
      }
  
      //2. snake撞到自己
      for( var i=1; i<snakeArr.length; i++ ){
        if( snakeArr[0].c == snakeArr[i].c && snakeArr[0].r == snakeArr[i].r ){
           clearInterval(timer);
           die = true;
           alert('GAME OVER');
        }
      }
  
      //snake吃水果
      if( snakeArr[0].c == food[0].c && snakeArr[0].r == food[0].r ){
        food[0].div.css({background : 'url(./images/snake2.png) no-repeat'});
        snakeArr.splice(snakeArr.length - 1, 0, food[0]);
        food.shift();
        sorce += 10;
        $('#score').html(sorce);
      }
  
      //snake产生水果
      if( food.length == 0 ){
        createFood(); 
      }
  
  
      for(var i = 0; i < snakeArr.length; i++){
        setPosition(snakeArr[i]);
      }
    },speed);
  
}

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Pengeluaran makanan:

function createFood(){
    var r = parseInt(rows * Math.random());
    var c = parseInt(cols * Math.random());
    var casrsh = false;
      
    //2个水果出现的位置不能一样
    while( food.length == 0 ){
      //判断snake的位置，不能与snake相撞
      for( var i = 0; i < snakeArr.length; i++ ){
        if( r == snakeArr[i].r && c == snakeArr[i].c ){
          casrsh = true;
        }
      }
      //当位置不重叠的时候，产生水果
      if( !casrsh ){
        var i = parseInt(4 * Math.random());
        var foodDiv = $('<div style="background:url(./images/fruit'+ i +'.png);"></div>');
        home.append(foodDiv);
        food.push({r : r, c : c, div : foodDiv});
        setPosition(food[0]);
      }
    }
      
  } 

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Satu lagi fungsi penting ialah menetapkan semula kedudukan:

function setPosition(obj){
    obj.div.css({left : obj.c * 20, top : obj.r * 20}); 
    obj.div.removeClass().addClass(obj.d);
  }
  createFood();  //那页面一被加载出来就显示出食物！

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Saya harap artikel ini akan membantu semua orang yang mempelajari pengaturcaraan JavaScript.