Javascriptで対戦型のゲーム「リバーシ」を作る
リバーシ
盤をクリックしてコンピューターと交互に駒を配置できます。「開始」ボタンを押すとやり直しできます。
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=yes">
<META charset="UTF-8">
<title></title>
<script>
function TReversi(can,tx,button){
'use strict';
this.wh=320;
this.canvas=can;
this.cx=this.canvas.getContext('2d', {willReadFrequently:true});
this.canvas.style.width="70vmin";
this.canvas.style.height="70vmin";
this.canvas.setAttribute("width",this.wh+"px");
this.canvas.setAttribute("height",this.wh+"px");
this.textarea=tx;
this.ai=[
{x:0,y:0},{x:0,y:7},{x:7,y:7},{x:7,y:0},
{x:2,y:2},{x:2,y:5},{x:5,y:5},{x:5,y:2},
{x:2,y:0},{x:0,y:2},{x:0,y:5},{x:2,y:7},
{x:5,y:7},{x:7,y:5},{x:7,y:2},{x:5,y:0},
{x:3,y:1},{x:1,y:3},{x:1,y:4},{x:3,y:6},
{x:4,y:6},{x:6,y:4},{x:6,y:3},{x:4,y:1},
{x:3,y:0},{x:0,y:3},{x:0,y:4},{x:3,y:7},
{x:4,y:7},{x:7,y:4},{x:7,y:3},{x:4,y:0},
{x:3,y:2},{x:2,y:3},{x:2,y:4},{x:3,y:5},
{x:4,y:5},{x:5,y:4},{x:5,y:3},{x:4,y:2},
{x:2,y:1},{x:1,y:2},{x:1,y:5},{x:2,y:6},
{x:5,y:6},{x:6,y:5},{x:6,y:2},{x:5,y:1},
{x:1,y:0},{x:0,y:1},{x:0,y:6},{x:1,y:7},
{x:6,y:7},{x:7,y:6},{x:7,y:1},{x:6,y:0},
{x:1,y:1},{x:1,y:6},{x:6,y:6},{x:6,y:1},
{x:3,y:3},{x:3,y:4},{x:4,y:4},{x:4,y:3}
];
this.board=[];
this.pcuser="";//"","pc","user"
this.user_iro=1;//1:white 2:black
this.pc_iro=2;//1:white 2:black
this.winResize=function(event){
}
//開始
this.start=function(){
this.textarea.innerHTML="";
let x,y;
for(x=0;x<8;x++){
this.board[x]=[];
for(y=0;y<8;y++){
this.board[x][y]=0;
}
}
this.board[3][3]=1;
this.board[4][4]=2;
this.board[3][4]=2;
this.board[4][3]=1;
if(Math.random()>0.5){
this.pcuser="pc";
}else{
this.pcuser="user";
}
if(Math.random()>0.5){
this.user_iro=1;
this.pc_iro=2;
}else{
this.user_iro=2;
this.pc_iro=1;
}
this.draw();
this.textout_count();
this.textout();
if(this.pcuser=="pc"){
setTimeout(this.calculate.bind(this),1000);
}
}
//描画
this.draw=function(){
this.cx.fillStyle="#3C3";
this.cx.fillRect(0,0,this.wh,this.wh);
let x,y;
this.cx.strokeStyle="#FFF";
this.cx.lineWidth=4;
for(x=0;x<8;x++){
this.cx.beginPath();
this.cx.moveTo(this.wh/8*x,0);
this.cx.lineTo(this.wh/8*x,this.wh);
this.cx.stroke();
}
for(y=0;y<8;y++){
this.cx.beginPath();
this.cx.moveTo(0,this.wh/8*y);
this.cx.lineTo(this.wh,this.wh/8*y);
this.cx.stroke();
}
this.lineWidth=2;
for(x=0;x<8;x++){
for(y=0;y<8;y++){
if(this.board[x][y]==1){
this.cx.strokeStyle="#000";
this.cx.fillStyle="#FFF";
this.cx.beginPath();
this.cx.arc(this.wh/8*(x+0.5),this.wh/8*(y+0.5),this.wh/8/2*0.7,0,Math.PI*2,false);
this.cx.fill();
this.cx.stroke();
}
if(this.board[x][y]==2){
this.cx.strokeStyle="#FFF";
this.cx.fillStyle="#000";
this.cx.beginPath();
this.cx.arc(this.wh/8*(x+0.5),this.wh/8*(y+0.5),this.wh/8/2*0.7,0,Math.PI*2,false);
this.cx.fill();
this.cx.stroke();
}
}
}
}
//文字出力(順番)
this.textout=function(){
let ucol="",pcol="";
if(this.user_iro==1){ucol="白";pcol="黒";}else{ucol="黒";pcol="白";}
if(this.pcuser=="user"){this.textarea.innerHTML=this.textarea.innerHTML+'\nあなたの番('+ucol+')';}
if(this.pcuser=="pc"){this.textarea.innerHTML+='\nＰＣの番('+pcol+')';}
this.textarea.scrollTop=this.textarea.scrollHeight;
}
//文字列出力(駒の数)
this.textout_count=function(){
let ucol="",pcol="";
if(this.user_iro==1){ucol="白";pcol="黒";}else{ucol="黒";pcol="白";}
let x, y;
let pc_count=0, user_count=0;
for(x=0;x<8;x++){
for(y=0;y<8;y++){
if(this.board[x][y]==this.user_iro){
user_count++;
}else if(this.board[x][y]==this.pc_iro){
pc_count++;
}
}
}
this.textarea.innerHTML+='\nあなた('+ucol+'):'+user_count+' PC('+pcol+'):'+pc_count;
this.textarea.scrollTop=this.textarea.scrollHeight;
if(this.cannot_pc_user()){
this.pcuser="";
this.textarea.innerHTML+='\nゲーム終了';
this.textarea.scrollTop=this.textarea.scrollHeight;
}
}
this.canputpiece=function(x,y,okuiro,dx,dy){
let kaesuiro=1;
if(okuiro==1){kaesuiro=2;}
let flag=0;
let spx=x+dx;
let spy=y+dy;
while(spx>=0 && spx<=7 && spy>=0 && spy<=7){
if(this.board[spx][spy]==0){
break;
}else if(this.board[spx][spy]==kaesuiro){
flag=1;
}else if(this.board[spx][spy]==okuiro){
if(flag==1){flag=2;}
break;
}
spx+=dx;
spy+=dy;
}
if(flag==2){
return true;
}else{
return false;
}
}
this.canputpieces=function(x,y,okuiro){
let flag=false;
if(this.canputpiece(x,y,okuiro, 0,-1)){flag=true;}
if(this.canputpiece(x,y,okuiro,-1,-1)){flag=true;}
if(this.canputpiece(x,y,okuiro,-1, 0)){flag=true;}
if(this.canputpiece(x,y,okuiro,-1, 1)){flag=true;}
if(this.canputpiece(x,y,okuiro, 0, 1)){flag=true;}
if(this.canputpiece(x,y,okuiro, 1, 1)){flag=true;}
if(this.canputpiece(x,y,okuiro, 1, 0)){flag=true;}
if(this.canputpiece(x,y,okuiro, 1,-1)){flag=true;}
return flag;
}
this.reversepiece=function(x,y,okuiro,dx,dy){
let kaesuiro=1;
if(okuiro==1){kaesuiro=2;}
let res=this.canputpiece(x,y,okuiro,dx,dy);
if(res){
let spx=x+dx;
let spy=y+dy;
while(this.board[spx][spy]==kaesuiro&&spx>=0&&spx<=7&&spy>=0&&spy<=7){
this.board[spx][spy]=okuiro;
spx+=dx;
spy+=dy;
}
}
}
this.reversepieces=function(x,y,okuiro){
let flag=false;
if(this.reversepiece(x,y,okuiro, 0,-1)){flag=true;}
if(this.reversepiece(x,y,okuiro,-1,-1)){flag=true;}
if(this.reversepiece(x,y,okuiro,-1, 0)){flag=true;}
if(this.reversepiece(x,y,okuiro,-1, 1)){flag=true;}
if(this.reversepiece(x,y,okuiro, 0, 1)){flag=true;}
if(this.reversepiece(x,y,okuiro, 1, 1)){flag=true;}
if(this.reversepiece(x,y,okuiro, 1, 0)){flag=true;}
if(this.reversepiece(x,y,okuiro, 1,-1)){flag=true;}
return flag;
}
//交代
this.orderchange=function(){
if(this.pcuser=="user"){
this.pcuser="pc";
}else if(this.pcuser="pc"){
this.pcuser="user";
}
this.textout_count();
this.textout();
if(this.pcuser=="pc"){
setTimeout(this.calculate.bind(this),1000);
}
}
//次の手を探す
this.calculate=function(){
if(this.pcuser!="pc"){return false;}
let dx=-1;
let dy=-1;
let i;
for(i=0;i<this.ai.length;i++){
if(this.board[this.ai[i].x][this.ai[i].y]==0){
if(this.canputpieces(this.ai[i].x,this.ai[i].y,this.pc_iro)){
dx=this.ai[i].x;
dy=this.ai[i].y;
break;
}
}
}
if(dx==-1){
this.textarea.innerHTML+='\nＰＣ：駒を置けないのでパス';
this.textarea.scrollTop=this.textarea.scrollHeight;
}else{
this.board[dx][dy]=this.pc_iro;
this.reversepieces(dx,dy,this.pc_iro);
}
this.orderchange();
this.draw();
}
//ユーザーが駒を置けない(true)
this.cannot_user=function(){
let x,y;
let flag=true;
for(x=0;x<8;x++){
for(y=0;y<8;y++){
if(this.board[x][y]==0){
if(this.canputpieces(x,y,this.user_iro)){
flag=false;
break;
}
}
}
}
return flag;
}
//PCが駒を置けない(true)
this.cannot_pc=function(){
let x,y;
let flag=true;
for(x=0;x<8;x++){
for(y=0;y<8;y++){
if(this.board[x][y]==0){
if(this.canputpieces(x,y,this.pc_iro)){
flag=false;
break;
}
}
}
}
return flag;
}
//PCもユーザーも駒を置けない(true)
this.cannot_pc_user=function(){
let flag=true;
let x,y;
for(x=0;x<8;x++){
for(y=0;y<8;y++){
if(this.board[x][y]==0){
flag=false;
break;
}
}
}
if(flag==false){
if(this.cannot_user()&&this.cannot_pc()){
flag=true;
}
}
return flag;
}
this.click=function(event){
if(this.pcuser=="user"){
let stl = window.getComputedStyle(this.canvas);
let wh=parseFloat(stl.width)/8;
let x=Math.floor((event.clientX-event.target.getBoundingClientRect().left)/wh);
let y=Math.floor((event.clientY-event.target.getBoundingClientRect().top)/wh);
if(x>=0&&x<=7&&y>=0&&y<=7){
if(this.board[x][y]==0 && this.canputpieces(x,y,this.user_iro)){
this.board[x][y]=this.user_iro;
this.reversepieces(x,y,this.user_iro);
this.orderchange();
this.draw();
setTimeout(this.calculate.bind(this),1000);
}else{
this.textarea.innerHTML+='\n指定した場所には置けません';
this.textarea.scrollTop=this.textarea.scrollHeight;
}
}
}
}
button.addEventListener("click",this.start.bind(this));
this.start();
this.canvas.addEventListener("click",this.click.bind(this));
}
var reversi;
window.addEventListener('DOMContentLoaded',function(event){
reversi=new TReversi(
document.getElementById("reversi_canvas"), //描画キャンバス
document.getElementById("reversi_textarea"),//状態を表示するtextarea
document.getElementById("reversi_start") //スタートボタン
);
window.addEventListener("resize",reversi.winResize);
});
</script>
</head>
<body>
<button id="reversi_start">開始</button><br>
<canvas id="reversi_canvas"></canvas>
<textarea id="reversi_textarea" rows="8" style="width:100%;"></textarea>
<br>
<br>
</body>
</html>