Canvas小游戏——五子棋
前言
Canvas API(画布)是在HTML5中新增的标签用于在网页实时生成图像,并且可以操作图像内容。
HTML5的Canvas画布功能真的很强大,与之对应的还有Svg,都是HTML5的核心之一。想了解更多,来看看Canvas和Svg的对比。
HTML主体
<!--难度级别,可以不要,默认简单-->
<div class="choose">
<img src="images/bg.jpg" alt="" width="100%">
<div class="choose-lv">
<div class="levl">简单</div>
<div class="levl">中级</div>
<div class="levl">高级</div>
</div>
</div>
<div class="choose_shade"></div>
<!--棋盘上方的提示等,可以不要-->
<div class="player">
<div class="baiqi"><img src="images/baiqi.png" alt=""></div>
<div class="tips" id="tips">黑子先行</div>
<div class="heiqi"><img src="images/heiqi.png" alt=""></div>
<div class="clear"></div>
</div>
<!--这里才是重点,棋盘和棋子-->
<div class="checkerboard">
<canvas id="chess" width="450px" height="450px"></canvas>
<canvas id="chess_board" width="450px" height="450px"></canvas>
<canvas id="chess_pointer" width="450px" height="450px"></canvas>
</div>
JS
注释很详细,不做过多介绍了,注意赢棋算法,和难易程度算法
var num = 0;//连胜次数
var gameMode = false; // 模式,默认人机
var complexity = 1; // 人机时难度级别,默认简单
layer.confirm('请选择模式?', {
btn: ['人机', '人人'],
closeBtn: 0,
}, function(index, layero){
gameMode=false;
$('.choose').animate({
opacity:1
},800)
$('.choose_shade').animate({
opacity:0.6
},800)
layer.close(index);
}, function(index){
gameMode=true;
$('.choose_shade').animate({
opacity:0,
'z-index':-1
},800)
$('.choose').animate({
opacity:0,
'z-index':-1
},800)
});
$('.levl').click(function(){
var index=$(this).index() + 1;
complexity=index;
$('.choose').animate({
opacity:0,
'z-index':-1
})
$('.choose_shade').animate({
opacity:0,
'z-index':-1
})
})
var canWidth = Math.min( 500 , $(window).width()-30);
var canHeight=canWidth;
var chess=document.getElementById('chess');
var context=chess.getContext('2d');
var chess_board=document.getElementById('chess_board');
var context2=chess_board.getContext('2d');
var chess_pointer=document.getElementById('chess_pointer');
var context3=chess_pointer.getContext('2d');
var pointerEnd=[];
// 根据屏幕大小绘制棋盘
$('#chess_pointer').css({
width:canWidth,
height:canHeight
})
$('#chess').css({
width:canWidth,
height:canHeight
})
$('#chess_board').css({
width:canWidth,
height:canHeight
})
$('.checkerboard').css({
width:canWidth,
height:canHeight
})
var utilW=canWidth/15;
var utilH=utilW;
var me;
var chessBoard;
var over;
//赢法数组
var wins=[];
//赢法统计数组
var myWin=[];
var computerWin=[];
for(var i=0;i<15;i++){
wins[i]=[];
for(var j=0;j<15;j++){
wins[i][j]=[];
}
}
//赢法种类索引
var count=0;
//赢法种类数组
// 横线赢法
for(var i=0;i<15;i++){
for(var j=0;j<11;j++){
for(var k=0;k<5;k++){
wins[i][j+k][count]=true;
}
count++;
}
}
// 竖线赢法
for(var i=0;i<15;i++){
for(var j=0;j<11;j++){
for(var k=0;k<5;k++){
wins[j+k][i][count]=true;
}
count++;
}
}
// 斜线赢法
for(var i=0;i<11;i++){
for(var j=0;j<11;j++){
for(var k=0;k<5;k++){
wins[i+k][j+k][count]=true;
}
count++;
}
}
// 反斜线赢法
for(var i=0;i<11;i++){
for(var j=14;j>3;j--){
for(var k=0;k<5;k++){
wins[i+k][j-k][count]=true;
}
count++;
}
}
var init=function(){
context.clearRect(0,0,450,450);
context3.clearRect(0,0,450,450);
me=true;
chessBoard=[];
over=false;
for(var i=0;i<15;i++){
chessBoard[i]=[];
for(var j=0;j<15;j++){
chessBoard[i][j]=0;
}
}
for(var i=0;i<count;i++){
myWin[i]=0;
computerWin[i]=0;
}
}
init()
context2.strokeStyle="#dfdfdf";
var img=new Image();
img.src="images/logo.png";
img.=function(){
drawChessBoard();
}
var drawChessBoard=function(){
for(var i=0;i<15;i++){
context2.moveTo(15+i*30,15);
context2.lineTo(15+i*30,435);
context2.stroke();
context2.moveTo(15,15+i*30);
context2.lineTo(435,15+i*30);
context2.stroke();
}
}
var oneStep=function(i,j,me){
context3.clearRect(0,0,450,450);
context.beginPath();
context.arc(15+i*30,15+j*30,13,0, 2*Math.PI);
context.closePath();
var gradient=context.createRadialGradient(15+i*30+2,15+j*30-2,13,15+i*30+2,15+j*30-2,0);
if(me){
gradient.addColorStop(0,"#0a0a0a");
gradient.addColorStop(1,"#636766");
}else{
gradient.addColorStop(0,"#C7C7C7");
gradient.addColorStop(1,"#f9f9f9");
}
context.fillStyle=gradient;
context.fill();
context3.beginPath();
context3.arc(15+i*30,15+j*30,15,0, 2*Math.PI);
context3.closePath();
context3.fillStyle="#FF3366";
context3.fill();
}
chess.=function(e){
e.preventDefault();
var x=e.offsetX;
var y=e.offsetY;
moveLater(x,y);
}
var moveLater=function(x,y){
if(over){
return;
}
var i=Math.floor(x/utilW);
var j=Math.floor(y/utilW);
if(chessBoard[i][j]==0){
oneStep(i,j,me);
if(gameMode){
if (me) {
chessBoard[i][j] = 1;
for (var k = 0; k < count; k++) {
if (wins[i][j][k]) {
myWin[k]++;
computerWin[k] = 6;
if (myWin[k] == 5) {
over = true;
layer.open({
title: '黑子赢了',
content: '亲,再来一局试试!',
btn: ['嗯', '不要'],
yes: function(index){
init();
layer.close(index);
}
});
}
}
}
} else {
chessBoard[i][j] = 2;
for (var k = 0; k < count; k++) {
if (wins[i][j][k]) {
computerWin[k]++;
myWin[k] = 6;
if (computerWin[k] == 5) {
over = true;
layer.open({
title: '白子赢了',
content: '亲,再来一局试试!',
btn: ['嗯', '不要'],
yes: function(index){
// location.reload();
init();
layer.close(index);
}
});
}
}
}
}
me = !me;
}else{
chessBoard[i][j]=1;
for(var k=0;k<count;k++){
if(wins[i][j][k]){
myWin[k]++;
computerWin[k]=6;
if(myWin[k]==5){
over=true;
$('.black').css({'z-index':2})
layer.open({
title: '你赢了',
content: '亲,人家是你的了!',
btn: ['要', '不要'],
yes: function(index){
// location.reload();
num++;
if(num>=3){
$('#tips').html('常胜将军,已连胜'+num+'局');
}else{
$('#tips').html('你已连胜'+num+'局');
}
init();
layer.close(index);
}
});
}
}
}
if(!over){
$('#tips').html('电脑走棋,走着瞧');
me=!me;
computerAI();
}
}
}
}
var computerAI=function(){
var myScore=[];
var computerScore=[];
var max=0;
var u=0,v=0;
for(var i=0;i<15;i++){
myScore[i]=[];
computerScore[i]=[];
for(var j=0;j<15;j++){
myScore[i][j]=0;
computerScore[i][j]=0;
}
}
for(var i=0;i<15;i++){
for(var j=0;j<15;j++){
if(chessBoard[i][j]==0){
for(var k=0;k<count;k++){
if(wins[i][j][k]){
if(complexity==1){
if(myWin[k]==1){
myScore[i][j]+=200;
}else if(myWin[k]==2){
myScore[i][j]+=400;
}else if(myWin[k]==3){
myScore[i][j]+=2000;
}else if(myWin[k]==4){
myScore[i][j]+=10000;
}
if(computerWin[k]==1){
computerScore[i][j]+=100;
}else if(computerWin[k]==2){
computerScore[i][j]+=300;
}else if(computerWin[k]==3){
computerScore[i][j]+=600;
}else if(computerWin[k]==4){
computerScore[i][j]+=14000;
}
}else if(complexity==2){
if(myWin[k]==1){
myScore[i][j]+=200;
}else if(myWin[k]==2){
myScore[i][j]+=400;
}else if(myWin[k]==3){
myScore[i][j]+=2000;
}else if(myWin[k]==4){
myScore[i][j]+=10000;
}
if(computerWin[k]==1){
computerScore[i][j]+=300;
}else if(computerWin[k]==2){
computerScore[i][j]+=500;
}else if(computerWin[k]==3){
computerScore[i][j]+=2100;
}else if(computerWin[k]==4){
computerScore[i][j]+=15000;
}
}else if(complexity==3){
if(myWin[k]==1){
myScore[i][j]+=200;
}else if(myWin[k]==2){
myScore[i][j]+=400;
}else if(myWin[k]==3){
myScore[i][j]+=2000;
}else if(myWin[k]==4){
myScore[i][j]+=10000;
}
if(computerWin[k]==1){
computerScore[i][j]+=210;
}else if(computerWin[k]==2){
computerScore[i][j]+=850;
}else if(computerWin[k]==3){
computerScore[i][j]+=3000;
}else if(computerWin[k]==4){
computerScore[i][j]+=80000;
}
}
}
}
if(myScore[i][j]>max){
max=myScore[i][j];
u=i;
v=j;
}else if(myScore[i][j]==max){
if(computerScore[i][j]>computerScore[u][v]){
u=i;
v=j;
}
}
if(computerScore[i][j]>max){
max=computerScore[i][j];
u=i;
v=j;
}else if(computerScore[i][j]==max){
if(myScore[i][j]>myScore[u][v]){
u=i;
v=j;
}
}
}
}
}
oneStep(u,v,false);
chessBoard[u][v]=2;
for(var k=0;k<count;k++){
if(wins[u][v][k]){
computerWin[k]++;
myWin[k]=6;
if(computerWin[k]==5){
over=true;
layer.open({
title: '你输了',
content: '不要放弃,再来一局吧!',
btn: ['嗯', '不要'],
yes: function(index){
// location.reload();
num=0;
init();
layer.close(index);
}
});
}
}
}
if(!over){
me=!me;
if(num==0){
$('#tips').html('该你走棋了,我看好你');
}
}
}
CSS
css都是可有可无的,不影响功能,都是为了美化页面
body,html{
margin:0;
padding:0;
position: relative;
width: 100%;
height: 100%;
}
.chess-content{
padding-top: 48px;
}
canvas{
display: block;
margin:0px auto;
box-shadow: -2px -2px 2px #efefef,5px 5px 5px #b9b9b9;
}
h3{
margin:0;
}
.clear{
clear: both;
}
.checkerboard{
margin:0 auto;
}
#chess{
position: absolute;
z-index: 2;
}
#chess_board{
position: absolute;
z-index: 1;
}
#chess_pointer{
position: absolute;
z-index: 0;
}
.player{
max-width: 500px;
margin:0 auto;
}
.player .baiqi{
float: left;
}
.player .baiqi{
width:15%;
}
.player .tips{
float: left;
width: 70%;
text-align: center;
font-size: 18px;
}
.player .heiqi{
width:15%;
float: right;
}
.player div img{
width: 100%;
}
.choose{
position: absolute;
z-index: 10;
width: 80%;
max-width: 500px;
left: 50%;
border: 1px solid #dfdfdf;
border-radius: 5px;
opacity: 0;
top: 50%;
transform: translateY(-50%);
overflow: hidden;
}
.choose img{
width: 100%;
}
.choose_shade{
width: 100%;
height: 100%;
position: absolute;
z-index: 9;
background: #000;
opacity: 0.6;
margin:0;
}
.choose-lv{
position: absolute;
top: 28%;
width: 100%;
}
.choose-lv div{
margin: 19px 0px 10px 52%;
width: 40%;
text-align: center;
border-radius: 5px;
border: 1px solid #F2F2F2;
color: #fff;
text-shadow: 10px 7px 17px;
font-weight: bold;
line-height: 35px;
z-index: 1;
position: relative;
background: rgba(0, 0, 0, 0.18);
cursor: pointer;
}
.black{
float: right;
position: absolute;
z-index: 1;
width: 40%;
max-width: 400px;
bottom:0;
}
.black img{
width: 100%;
}
.b_img3,.b_img4{
right:0;
}
.tips{
line-height: 75px;
}
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