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
关于JavaScript的gzip静态压缩方法
Jan 05 Javascript
javascript各种复制代码收集
Sep 20 Javascript
论坛里点击别人帖子下面的回复，回复标题变成“回复 24# 的帖子”
Jun 14 Javascript
jQuery代码优化之基本事件
Nov 01 Javascript
jquery 缓存问题的几个解决方法
Nov 11 Javascript
javaScript实现可缩放的显示区效果代码
Oct 26 Javascript
jquery对象和DOM对象的任意相互转换
Feb 21 Javascript
BootStrap文件上传样式超好看【持续更新】
May 10 Javascript
js前端解决跨域问题的8种方案（最新最全）
Nov 18 Javascript
webpack源码之loader机制详解
Apr 06 Javascript
JQuery元素快速查找与操作
Apr 22 jQuery
vue2.0 可折叠列表 v-for循环展示的实例
Sep 07 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
实用文书(952) 通知(159) 文书(291) 申请书(21) 导游词(322) 观后感(479) AngularJS(2) 闭幕词(9) 慰问信(53) HAM-2000(1)
You might like
纯真IP数据库的应用 IP地址转化成十进制
2009/06/14 PHP
Ping服务的php实现方法,让网站快速被收录
2012/02/04 PHP
网上应用的一个不错common.js脚本
2007/08/08 Javascript
JavaScript面向对象编程
2008/03/02 Javascript
event对象的方法 兼容多浏览器
2009/06/27 Javascript
JavaScript判断变量是对象还是数组的方法
2014/08/28 Javascript
node.js [superAgent] 请求使用示例
2015/03/13 Javascript
AngularJS入门教程中SQL实例详解
2016/07/27 Javascript
onmouseover事件和onmouseout事件全面理解
2016/08/15 Javascript
jQuery中 $ 符号的冲突问题及解决方案
2016/11/04 Javascript
微信小程序图表插件(wx-charts)实例代码
2017/01/17 Javascript
微信小程序图片选择、上传到服务器、预览（PHP）实现实例
2017/05/11 Javascript
详解Vue使用命令行搭建单页面应用
2017/05/24 Javascript
JavaScript实现的贝塞尔曲线算法简单示例
2018/01/30 Javascript
vue组件表单数据回显验证及提交的实例代码
2018/08/30 Javascript
JavaScript实现表单注册、表单验证、运算符功能
2018/10/15 Javascript
layui switch 开关监听 弹出确定状态转换的例子
2019/09/21 Javascript
[10:04]国际邀请赛采访专栏：DK.Farseer，mouz.Black^，采访员Josh专访
2013/08/05 DOTA
极简的Python入门指引
2015/04/01 Python
Flask-Mail用法实例分析
2018/07/21 Python
pytorch使用指定GPU训练的实例
2019/08/19 Python
Python 3.8正式发布,来尝鲜这些新特性吧
2019/10/15 Python
如何将tensorflow训练好的模型移植到Android (MNIST手写数字识别)
2020/04/22 Python
Keras:Unet网络实现多类语义分割方式
2020/06/11 Python
Python 爬虫性能相关总结
2020/08/03 Python
解决virtualenv -p python3 venv报错的问题
2021/02/05 Python
老师推荐信
2013/10/28 职场文书
市场营销毕业生自荐信范文
2014/04/01 职场文书
教师三严三实对照检查材料
2014/09/25 职场文书
房产协议书范本
2014/10/18 职场文书
学校捐书倡议书
2015/04/27 职场文书
写给媳妇的检讨书
2015/05/06 职场文书
2015年毕业实习工作总结
2015/05/29 职场文书
管理者日常工作必备：22条企业管理流程模板！
2019/07/12 职场文书
创业计划书之校园跑腿公司
2019/09/24 职场文书
html css3不拉伸图片显示效果
2021/06/07 HTML / CSS