首页
所有分类
TAGS
文字工具 EMOJI BIBLE
编程 Javascript

JS+Canvas实现的俄罗斯方块游戏完整实例

Posted in Javascript onDecember 12, 2016

本文实例讲述了JS+Canvas实现的俄罗斯方块游戏。分享给大家供大家参考，具体如下：

试玩（没有考虑兼容低版本浏览器）：

JS+Canvas实现的俄罗斯方块游戏完整实例

**********************************************************************
9月3日更新：
修复了隐藏的比较深的BUG
加上暂停、再来一次功能
速度随分数增高而递减
添加log日志
*********************************************************************

通过写这个游戏收获几点：

1、canvas的isPointInPath方法不支持fillRect、strokeRect的上下文。

2、canvas有内边距（padding）时，传入isPointInPath方法的坐标需要减去padding值。

3、通过json的方法JSON.parse(JSON.stringify(Object))可以快速克隆Object对象，但是要注意：当Object对象里有方法时，克隆过来依然是引用关系。

源码：

<!DOCTYPE html>
<html lang="zh-CN">
  <head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>canvas版俄罗斯方块</title>
  <style>
  #canvas{
    background: #272822;
    display: block;
    margin: 0 auto;
  }
  </style>
</head>
<body>
<p style="text-align: center;">操作：↑变形；↓下移；←左移；→右移</p>
<canvas id="canvas" width="640" height="600">
  您的浏览器不支持canvas！
</canvas>
<script>
/****************************
作者：王美建 2015年9月3日20:30:35
*后续可添加怪异变形，类似于L可变成Z
*积分随关卡递增
*初始化部分historyBlock
****************************/
var tetris = {
  canvas : document.getElementById("canvas"),
  ctx : this.canvas.getContext("2d"),
  width : 481,
  height : 600,
  logLen: 8,
  mapColor: "#464741",
  logColor: "green",
  status: 'ready',
  unit : 30,
  curText : "开始",
  blockData : function(index, row, col){
    var r = row || 1,
      c = col || Math.floor((this.col - 3)/2) + 2,
      block = [
        [
          {color: 'red', status: 1, data: [{x: r, y:c-1}, {x: r+1, y:c-1}, {x: r+1, y:c}, {x: r+1, y:c+1}], center: {x: r, y: c}},
          {color: 'red', status: 2, data: [{x: r-1, y:c-1}, {x: r-1, y:c}, {x: r, y:c-1}, {x: r+1, y:c-1}], center: {x: r, y: c}},
          {color: 'red', status: 3, data: [{x: r-1, y:c-1}, {x: r-1, y:c}, {x: r-1, y:c+1}, {x: r, y:c+1}], center: {x: r, y: c}},
          {color: 'red', status: 4, data: [{x: r-1, y:c+1}, {x: r, y:c+1}, {x: r+1, y:c+1}, {x: r+1, y:c}], center: {x: r, y: c}}
        ],
        [
          {color: 'green', status: 1, center: {x: r, y:c}, data: [{x: r, y:c+1}, {x: r+1, y:c-1}, {x: r+1, y:c}, {x: r+1, y:c+1}]},
          {color: 'green', status: 2, center: {x: r, y:c}, data: [{x: r-1, y:c-1}, {x: r, y:c-1}, {x: r+1, y:c-1}, {x: r+1, y:c}]},
          {color: 'green', status: 3, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r-1, y:c-1}, {x: r-1, y:c}, {x: r-1, y:c+1}]},
          {color: 'green', status: 4, center: {x: r, y:c}, data: [{x: r-1, y:c}, {x: r-1, y:c+1}, {x: r, y:c+1}, {x: r+1, y:c+1}]}
        ],
        [
          {color: 'blue', status: 1, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r+1, y:c}, {x: r+1, y:c+1}]},
          {color: 'blue', status: 2, center: {x: r, y:c}, data: [{x: r+1, y:c-1}, {x: r, y:c-1}, {x: r, y:c}, {x: r-1, y:c}]}
        ],
        [
          {color: 'orange', status: 1, center: {x: r, y:c}, data: [{x: r+1, y:c-1}, {x: r+1, y:c}, {x: r, y:c}, {x: r, y:c+1}]},
          {color: 'orange', status: 2, center: {x: r, y:c}, data: [{x: r-1, y:c}, {x: r, y:c}, {x: r, y:c+1}, {x: r+1, y:c+1}]}
        ],
        [
          {color: 'yellow', status: 1, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r+1, y:c-1}, {x: r+1, y:c}]}
        ],
        [
          {color: 'aqua', status: 1, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r, y:c+1}, {x: r-1, y:c}]},
          {color: 'aqua', status: 2, center: {x: r, y:c}, data: [{x: r+1, y:c}, {x: r, y:c}, {x: r, y:c+1}, {x: r-1, y:c}]},
          {color: 'aqua', status: 3, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r, y:c+1}, {x: r+1, y:c}]},
          {color: 'aqua', status: 4, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r+1, y:c}, {x: r-1, y:c}]}
        ],
        [
          {color: 'indigo', status: 1, center: {x: r, y:c}, data: [{x: r, y:c-1}, {x: r, y:c}, {x: r, y:c+1}, {x: r, y:c+2}]},
          {color: 'indigo', status: 2, center: {x: r, y:c}, data: [{x: r-2, y:c}, {x: r-1, y:c}, {x: r, y:c}, {x: r+1, y:c}]}
        ]
      ]
    return block[index];
  },
  init : function(){
    var self = this;
    self.reset();
    self.addEvent("keydown", window, function(ev){
      var ev = ev || window.event,
        code = ev.keycode || ev.which;
      if(self.handle[code] && self.status === "play"){
        self.handle[code].call(self);
        self.createMap();
        ev.preventDefault();
      }
    })
    self.addEvent("click", document, function(ev){
      self.createMap(ev);
    })
    return this;
  },
  reset: function(){
    var self = this;
    self.score = 0;
    self.speed = 1000;
    self.log = [];
    self.historyBlock = [];
    self.row = Math.floor(self.height/self.unit);
    self.col = Math.floor(self.width/self.unit);
    self.curBlockIndex = Math.round(Math.random()*6);
    self.curBlocks = self.blockData(self.curBlockIndex);
    self.curBlock = self.curBlocks[0];
    self.createNext().createMap();
    return this;
  },
  createNext: function(){
    var self = this;
    self.nextBlockIndex = self.status === "ready" ? self.curBlockIndex : Math.round(Math.random()*6);
    self.nextBlocks = self.blockData(self.nextBlockIndex, 4, self.col+3);
    self.nextBlock = self.nextBlocks[0];
    return this;
  },
  addEvent : function(ev, ele, callback){
    if( ele.addEventListener ){
      ele.addEventListener(ev,callback,false);
    }else{
      ele.attachEvent("on"+ev, callback);
    }
  },
  createMap : function(ev){
    var self = this,
      ctx = self.ctx;
    ctx.clearRect(0, 0, self.canvas.width, self.canvas.height);
    for (var i = 0; i < self.col; i++) {
      for (var j = 0; j < self.row; j++) {
        ctx.save();
        ctx.strokeStyle = self.mapColor;
        ctx.strokeRect(i*self.unit, j*self.unit, self.unit, self.unit);
        ctx.stroke();
        ctx.restore();
      };
    };
    self.showText(ev).createBlock().createLog();
    if(self.status !== "ready"){
      self.drawRect(self.curBlock.data);
    }
    return this;
  },
  createBlock : function(){
    var self = this,
      block = self.curBlock.data;
    self.drawRect(self.historyBlock);
    if(self.collide(40, true)){
      block.map(function(val){
        val.x--;
      })
      setTimeout(function(){
        clearInterval(self.timer);
        if(localStorage.getItem("score") === null){
          localStorage.setItem("score", self.score);
        }else if(localStorage.getItem("score") - self.score < 0 ){
          localStorage.setItem("score", self.score);
          alert("新纪录！"+self.score+"分！");
          self.printLog({log:"新纪录！"+self.score+"分！", color: 'red'});
          return;
        }
        self.status = "over";
        self.curText = "重来";
        self.showText();
        self.printLog({log:"GAME OVER", color: 'red'});
      },10)
    }
    return this;
  },
  drawRect : function(block){
    var self = this;
    for (var i = 0; i < block.length; i++) {
      self.ctx.save();
      self.ctx.fillStyle = block[i].color || self.curBlock.color;
      self.ctx.strokeStyle = self.mapColor;
      self.ctx.fillRect((block[i].y - 1)*self.unit, (block[i].x - 1)*self.unit, self.unit, self.unit );
      self.ctx.strokeRect((block[i].y - 1)*self.unit, (block[i].x - 1)*self.unit, self.unit, self.unit );
      self.ctx.restore();
    };
  },
  move : function(){
    var self = this;
    clearInterval(self.timer);
    self.timer = setInterval(function(){
      // 实时刷新数据 大坑！
      var curBlock = self.curBlock,
        data = self.curBlock.data;
      if( self.collide() || data.some(function(val){
        return val.x + 1 > self.row;
      }) ){
        clearInterval(self.timer);
        self.historyBlock.push.apply(self.historyBlock, data.map(function(val){
            val.color = curBlock.color;
            return val;
        }));
        self.remove();
        self.curBlockIndex = self.nextBlockIndex;
        self.curBlocks = self.blockData(self.curBlockIndex);
        self.curBlock = self.curBlocks[0];
        self.createNext().createMap().move();
        return false;
      }
      for (var i = 0; i < data.length; i++) {
        data[i].x++;
      };
      self.curBlock.center.x++;
      self.createMap();
    }, self.speed)
    return this;
  },
  remove : function(){
    var self = this,
      count = {},
      n = 0,
      maxRow = 0,
      delArr = [],
      block = self.historyBlock;
    for (var i = 0; i < block.length; i++) {
      if(count[block[i].x]){
        count[block[i].x].length += 1;
      }else{
        count[block[i].x] = [1];
      }
    };
    console.log( count )
    for (var attr in count) {
      if(count[attr].length === self.col){
        n++;
        //maxRow = attr > maxRow ? attr : maxRow;
        for (var i = 0; i < block.length; i++) {
          if(block[i].x == attr){
            delArr = block.splice(i, 1);
            i--;
          }
        };
        count[attr].length = 0;
        block.forEach(function(val){
          val.x < attr && (val.x += 1);
        })
      }
    };
    // 边消除边下降会死循环
    if(n > 0){
      self.score += n*100;
      self.printLog("得分+"+n*100);
      // 一次消除3行奖励100分
      if(n === 3){
        self.score += 100;
        self.printLog("奖励"+100+"分~");
      }
      // 一次消除4行奖励200分
      if(n === 4){
        self.score += 200;
        self.printLog("奖励"+200+"分~");
      }
      /*block.forEach(function(val){
        val.x < maxRow && (val.x += n);
      })*/
      self.changeSpeed();
    }
  },
  changeSpeed: function(){
    var self = this;
    if( self.score >= 3000 && self.score < 5000 ){
      self.speed = 800;
    }else if( self.score >= 5000 && self.score < 10000 ){
      self.speed = 600;
      self.score += 100;
    }else if( self.score >= 10000 && self.score < 20000 ){
      self.speed = 400;
      self.score += 150;
    }else if( self.score >= 20000 && self.score < 40000 ){
      self.speed = 200;
      self.score += 200;
    }else if( self.score >= 40000 ){
      self.speed = 100;
      self.score += 300;
    }
    return this;
  },
  collide : function(direction, isCreate){
    var block = JSON.parse(JSON.stringify(this.curBlock)),
      result = false,
      self = this;
    direction = direction || 40;
    // direction:碰撞方向，默认下方
    if(direction === 37){
      self.mLeft(block);
    }else if(direction === 38){
      block = self.distortion(block);
    }else if(direction === 39){
      self.mRight(block);
    }else if(direction === 40 && !isCreate){
      // 非新增方块则往下移动一格
      block.data.forEach(function(val){
        val.x++;
      })
    }
    result = block.data.some(function(val){
      return (val.x > self.row || val.y < 1 || val.y > self.col);
    })
    if(result){
      return result;
    }else{
      return block.data.some(function(val){
        return self.historyBlock.some(function(value){
          return (value.x === val.x && value.y === val.y);
        })
      })
    }
  },
  mLeft : function(block){
    if(block.data.every(function(val){
      return val.y - 1 >= 1;
    })){
      block.data.forEach(function(val){
        val.y--;
      })
      block.center.y--;
    }
  },
  mRight : function(block){
    var self = this;
    if(block.data.every(function(val){
      return val.y + 1 <= self.col;
    })){
      block.data.forEach(function(val){
        val.y++;
      })
      block.center.y++;
    }
  },
  distortion : function(block){
    var self = this,
      curRow = block.center.x,
      curCol = block.center.y,
      status = block.status + 1 > self.curBlocks.length ? 1 : block.status + 1;
    self.curBlocks = self.blockData(self.curBlockIndex, block.center.x, block.center.y);
    return self.curBlocks[status-1];
  },
  // 控制：上（变形）、右（右移）、下（下移）、左（左移）
  handle : {
    // 左键 code 37
    37: function(){
      var self = this;
      if(!self.collide(37)){
        self.mLeft(self.curBlock);
      }
    },
    // 上键 code 38
    38: function(){
      var self = this;
      if(!self.collide(38)){
        self.curBlock = self.distortion(self.curBlock);
      }
    },
    // 右键 code 39
    39: function(){
      var self = this;
      if(!self.collide(39)){
        self.mRight(self.curBlock);
      }
    },
    // 下键 code 40
    40: function(){
      var self = this;
      if(!self.collide()){
        self.curBlock.data.forEach(function(val){
          val.x++;
        })
        self.curBlock.center.x++;
      }
    }
  },
  showText: function(ev){
    var self = this,
      ctx = self.ctx;
    ctx.clearRect(self.width, 0, self.canvas.width - self.width, self.height);
    ctx.save();
    ctx.beginPath();
    ctx.font = "20px Verdana";
    ctx.fillStyle = "green";
    ctx.fillText("下一个:", self.width+10, 30);
    ctx.fillText("分数:", self.width+10, 200);
    ctx.fillText("速度:", self.width+10, 260);
    ctx.fillText("作者:王美建", self.width+10, 580);
    ctx.fillStyle = "red";
    ctx.fillText(self.score, self.width+10, 230);
    ctx.fillText(self.speed + "毫秒", self.width+10, 290);
    ctx.fillStyle = "green";
    ctx.fillRect(self.width + 30, 320, 100, 40);
    // isPointInPath对fillRect()兼容不好 又一个大坑！
    ctx.rect(self.width + 30, 320, 100, 40);
    if( ev && ctx.isPointInPath(ev.layerX, ev.layerY) ){
      switch(self.status){
        case "ready":
        self.status = "play";
        self.curText = "暂停";
        self.log = ["开始游戏."];
        self.createNext().move();
        break;
        case "play":
        self.status = "paush";
        self.curText = "继续";
        clearInterval(self.timer);
        self.printLog("暂停.");
        break;
        case "paush":
        self.status = "play";
        self.curText = "暂停";
        self.printLog("继续游戏~");
        self.move();
        break;
        case "over":
        self.status = "play";
        self.curText = "暂停";
        self.reset().move();
        self.printLog("开始游戏~");
        break;
      }
    }
    ctx.fillStyle = "black";
    ctx.fillText(self.curText, self.width+60, 350);
    ctx.restore();
    ctx.closePath();
    self.nextBlock.data.forEach(function(val){
      val.color = self.nextBlock.color;
    })
    self.drawRect(self.nextBlock.data);
    return this;
  },
  printLog: function(log){
    var self = this;
    if(log){
      self.log.unshift(log);
      self.log.length > self.logLen && (self.log.length = self.logLen);
    }
    self.createLog();
    return this;
  },
  createLog: function(){
    var self = this,
      ctx = self.ctx;
    // 清除log
    ctx.clearRect(self.width+10, 380, 136, 170);
    self.log.forEach(function(val, index){
      if(val){
        ctx.save();
        ctx.font = "16px Verdana";
        ctx.fillStyle = val.color || self.logColor,
        ctx.fillText(val.log || val, self.width+10, 400+index*22);
        ctx.restore();
      }
    })
    return this;
  }
}
tetris.init();
</script>
</body>
</html>

持续优化中……

希望本文所述对大家JavaScript程序设计有所帮助。

JS+Canvas实现的俄罗斯方块游戏完整实例

- Author -

wangmeijian

声明：登载此文出于传递更多信息之目的，并不意味着赞同其观点或证实其描述。

Javascript 相关文章推荐
Javascript入门学习资料收集整理篇
Jul 06 Javascript
深入理解JQuery keyUp和keyDown的区别
Dec 12 Javascript
js随机生成网页背景颜色的方法
Feb 26 Javascript
javascript日期格式化方法汇总
Oct 04 Javascript
当jquery ajax遇上401请求的解决方法
May 19 Javascript
jQuery实现的表头固定效果实例【附完整demo源码下载】
Aug 01 Javascript
浅谈javascript:两种注释,声明变量,定义函数
Oct 05 Javascript
微信小程序tabBar用法实例详解
Dec 04 Javascript
vue里面父组件修改子组件样式的方法
Feb 03 Javascript
浅谈Vue.use到底是什么鬼
Jan 21 Javascript
vuex 多模块时 模块内部的mutation和action的调用方式
Jul 24 Javascript
JS数据类型分类及常用判断方法
Nov 19 Javascript
最好用的Bootstrap fileinput.js文件上传组件
Dec 12 #Javascript
jQuery Ajax File Upload实例源码
Dec 12 #Javascript
VueJs与ReactJS和AngularJS的异同点
Dec 12 #Javascript
layer实现弹窗提交信息
Dec 12 #Javascript
详解Javascript数据类型的转换规则
Dec 12 #Javascript
设置jquery UI 控件的大小方法
Dec 12 #Javascript
JS中检测数据类型的几种方式及优缺点小结
Dec 12 #Javascript
美国航天局(1) 大脑(1) RNA(2) 数据(1) iPhone(1) 富碳陨石(1) DNA(2) 陨石(1) 嘧啶碱基(2) iOS15(1)
You might like
用Zend Studio+PHPnow+Zend Debugger搭建PHP服务器调试环境步骤
2014/01/19 PHP
[原创]PHP实现字节数Byte转换为KB、MB、GB、TB的方法
2017/08/31 PHP
PHP实现基于图的深度优先遍历输出1,2,3...n的全排列功能
2017/11/10 PHP
thinkphp中U方法按路由规则生成url的方法
2018/03/12 PHP
Avengerls vs Newbee BO3 第三场2.18
2021/03/10 DOTA
JavaScript TO HTML 转换
2006/06/26 Javascript
简单的js分页脚本
2009/05/21 Javascript
angularjs实现与服务器交互分享
2014/06/24 Javascript
JavaScript实现按键精灵的原理分析
2017/02/21 Javascript
js判断用户是输入的地址请求的路径(实例讲解)
2017/07/18 Javascript
微信小程序实现鼠标拖动效果示例
2017/12/01 Javascript
webpack配置打包后图片路径出错的解决
2018/04/26 Javascript
详解vue添加删除元素的方法
2018/06/30 Javascript
使用vue-cli webpack 快速搭建项目的代码
2018/11/21 Javascript
了解前端理论：rscss和rsjs
2019/05/23 Javascript
解决包含在label标签下的checkbox在ie8及以下版本点击事件无效果兼容的问题
2019/10/27 Javascript
编写Python爬虫抓取暴走漫画上gif图片的实例分享
2016/04/20 Python
Python heapq使用详解及实例代码
2017/01/25 Python
在VS Code上搭建Python开发环境的方法
2018/04/06 Python
Window环境下Scrapy开发环境搭建
2018/11/18 Python
Python读取Pickle文件信息并计算与当前时间间隔的方法分析
2019/01/30 Python
对tensorflow 中tile函数的使用详解
2020/02/07 Python
Python3 中sorted() 函数的用法
2020/03/24 Python
使用Python防止SQL注入攻击的实现示例
2020/05/21 Python
python pip如何手动安装二进制包
2020/09/30 Python
css3气泡 css3关键帧动画创建的动态通知气泡
2013/02/26 HTML / CSS
原装进口全世界：天猫国际
2016/08/03 全球购物
新西兰廉价汽车租赁：Snap Rentals
2018/09/14 全球购物
请说出几个常用的异常类
2013/01/08 面试题
点菜员岗位职责范本
2014/02/14 职场文书
开展创先争优活动总结
2014/08/28 职场文书
暑假安全教育广播稿
2014/09/10 职场文书
交通事故委托书范本精选
2014/10/04 职场文书
项目建议书
2015/02/04 职场文书
青少年法制教育心得体会
2016/01/14 职场文书
微软Win11什么功能最惊艳? Windows11新功能特性汇总
2021/11/21 数码科技