像这种类型的游戏，一般是有个主循环的函数。要实现方块的的下落效果，首先要绘制出方块，下一个循环的时候清除之前位置的方块，在新的位置绘制方块，这样就有了下落的效果，还需要有碰撞的检测，通过计算下落方块如果往某个方向和已经落下的方块是否有重叠判断。创建新的方块。也有判断消除一行获取积分的。看下已完成的代码，我都给了详细的注释了：
<template> <div class='RussiaBlocks_cnt' :style="{'width':width||'480px'}"> <div class='head clear-float'>RussiaBlocks<span class='el-icon-close icon' @click="close"></span></div> <div class="main"> <canvas ref="mainCav" :height="cavHeight" :width="cavWidth"></canvas> </div> <div>分数:{{score}}</div> <div> <el-button size="small" @click="startGame">开始</el-button> <el-button size="small" @click="pauseGame">停止</el-button> </div> <!--<div> <div v-for="item in bootMap" style="height:5px;line-height:5px;"> <div v-for="block in item" :style="'width:5px;height:5px;display:inline-block;background-color:'+block.color"></div> </div>测试用--> </div> </div> </template> <script> export default { name:'Russia-blocks', comments:{ }, props: ['width'], data() { return { cavWidth:100,//宽高必须为大小的整数倍 px cavHeight:200, block_size:10,//方块的大小px score:0,//得分 bootMap:[],//已下落的元素构成的填充地图 falling:{},//当前正在下落的方块 fall_step:0,//下落的距离 handleMove:null,//定时器句柄 fallSpeed:300,//下落的速度 prevblock:[],//记录之前的方块，以便清除 footblock:[],//到了底部后停留在底部的方块 eventQueue:[],//等待消费的事件 } },mounted() { this.ctx=this.$refs.mainCav.getContext("2d"); for(var i=0;i<this.cavHeight/this.block_size;i++){//初始化地图映射 this.bootMap.push([]); for(var j=0;j<this.cavWidth/this.block_size;j++){ this.bootMap[i].push({ fill:0, color:"transparent" }) } } console.log(this.bootMap); },methods: { close(){ clearInterval(this.handleMove); this.$emit("execTrans",{fnc:"closeDialog",param:['showRussiaBlocks']}) },startGame(){ let that=this; if(that.handleMove){return;} this.score=0; this.drawRB(); document.addEventListener("keydown",function(event){ if([32,37,38,39,40].indexOf(event.keyCode)!=-1 && that.handleMove){//有效按键，并且游戏运行按键事件触发 that.eventQueue.push(event.code);//生产键盘事件 } }); },drawRB(){ let that=this; clearInterval(this.handleMove); let isinboot=true;//新的方块是否已经到了底部 this.handleMove=setInterval(() => {//主函数循环 that.ctx.save(); if(isinboot){//如果有方块到了底部新建一个方块 that.falling=that.makeblock(); isinboot=false; that.fall_step=0; } if(that.prevblock.length){//清除前一个方块的痕迹 let obj=that.prevblock.pop(); that.drawblock(obj.falling,obj.fall_step,true); } let eventItem; while(eventItem=that.eventQueue.pop()){//消费按键事件 switch(eventItem){ case "ArrowLeft":!that.hasCollapse(that.falling,"left") && that.falling.position--;break; case "ArrowRight":!that.hasCollapse(that.falling,"right") && that.falling.position++;break; } } that.drawblock(that.falling,that.fall_step,false);//绘制新的方块 that.prevblock.push({//旧方块入栈 falling:that.falling, fall_step:that.fall_step }); if(!that.hasCollapse(that.falling)){//判断方块是否和底部的方块碰撞 that.fall_step++; }else{ isinboot=true; that.footblock.push(that.prevblock.pop()); that.refreshFoot(); }//底部的不需要清理，直接弹出压入已完成移动的数组 that.ctx.restore(); }, this.fallSpeed); },pauseGame(){ clearInterval(this.handleMove); },makeblock(){//随机出现一个方块,单位是1方块 方块的高度就用数组的第一个长度凑合 var falling_block=this.russia_block[0|Math.random()*19]; var block_height=falling_block.arr.length; var block_width = falling_block.arr[0].length; var position_h=0|Math.random()*((this.cavWidth/this.block_size)-block_width);//初始的位置是随机的 return {block:falling_block,position:position_h,color:this.randomColor(),block_width:block_width,block_height:block_height} },randomColor(){//随机方块颜色 return ["#fec433","#ffa23e","#b8e745","#ff7659","#69b5fa","#d366f8"][Math.ceil(Math.random()*6)-1] },drawblock(block,step,isclean){//清除或者绘制方块 let that=this; for(let i=0;i<block.block.arr.length;i++){ for(let j=0;j<block.block.arr[i].length;j++){ if(block.block.arr[i][j]){ if(isclean){//脏区清除清除的区域要比原来的大一些，小方块是有边框的 that.ctx.save(); that.ctx.clearRect((block.position+j)*that.block_size, (step+i)*that.block_size,that.block_size,that.block_size); that.ctx.restore(); }else{//绘制小方块 that.ctx.save(); that.ctx.strokeStyle=block.color; that.ctx.lineWidth=1; that.ctx.strokeRect((block.position+j)*that.block_size+1, (step+i)*that.block_size+1,that.block_size-2,that.block_size-2) that.ctx.restore(); } } } } },hasCollapse(falling,direction="bottom"){//计算碰撞 let vertical_baise=0,horizontal_baise=0; if(direction==="bottom"){//如果向下会碰撞吗 if(falling.block_height+this.fall_step+1>this.cavHeight/this.block_size){//和底部碰撞停止 return true; } vertical_baise=1; } if(direction === "left"){//如果向左会碰撞吗 if(falling.position-1<0){//左碰撞 return true; } horizontal_baise=-1; } if(direction === "right"){//如果向右会碰撞吗 if(falling.position+1>((this.cavWidth/this.block_size)-falling.block_width)){//右碰撞 return true; } horizontal_baise=1; } for(var i=0;i<falling.block_height;i++){ for(var j=0;j<falling.block_width;j++){ if(falling.block.arr[i][j] + this.bootMap[this.fall_step+i+vertical_baise][falling.position+j+horizontal_baise].fill === 2){//元素有重合碰撞 return true; } } } return false; },refreshFoot(){//更新地图，并检测是否有底部可以消除进而得分 //todo this.footblock.map((val,index)=>{ let obj = val.falling.block; for(var i=0;i<val.falling.block_height;i++){//初始化地图映射 for(var j=0;j<val.falling.block_width;j++){ if(obj.arr[i][j]===1){ this.bootMap[val.fall_step+i][val.falling.position+j]={ fill:obj.arr[i][j], color:val.falling.color } } } } }); this.footblock=[]; let newBotMap=JSON.parse(JSON.stringify(this.bootMap)),shuldRend=false; this.bootMap.map((val,key)=>{ if(val.every(val=>val.fill===1)){//这一行满了，可以得分 newBotMap.splice(key,1); console.log("score",key); let addArr=new Array(this.cavWidth/this.block_size).fill({ fill:0, color:"transparent" }); newBotMap.unshift(addArr); this.score+=10; shuldRend=true; } }); this.bootMap=newBotMap; if(shuldRend){this.renderMap();}//当底部有更新时刷新底部 },renderMap(){ this.ctx.save(); for(var i=0;i<this.bootMap.length;i++){ for(var j=0;j<this.bootMap[i].length;j++){ if(this.bootMap[i][j].fill === 1){ this.ctx.strokeStyle=this.bootMap[i][j].color; this.ctx.lineWidth=1; this.ctx.strokeRect((j)*this.block_size+1, (i)*this.block_size+1,this.block_size-2,this.block_size-2); }else{ this.ctx.clearRect((j)*this.block_size, (i)*this.block_size,this.block_size,this.block_size); } } } this.ctx.restore(); } }, } </script> <style lang="scss" scoped> .RussiaBlocks_cnt{ background:#efefef; text-align:left; border:3px solid #efefef; left:20%; top:20%; position: absolute; .head{ text-align:center; padding:10px 0; .icon{ float:right; cursor: pointer; } } } </style>那么也是达到了初步的效果，如图： 先做到这里，还有方块旋转变换的没做，方块堆到顶部游戏失败也没判断。我好菜啊，哭唧唧
