この記事の例は、JS ミニゲームのチェス ダーク チェスのソース コードを説明しており、参考のために全員と共有されています。詳細は以下の通りです。
ゲームを実行すると、次のようになります:
JavaScript 部分:
/** chinese chess * Author: fdipzone * Date: 2012-06-24 * Ver: 1.0 */ var gameimg = ['images/a1.gif','images/a2.gif','images/a3.gif','images/a4.gif','images/a5.gif','images/a6.gif','images/a7.gif','images/b1.gif','images/b2.gif','images/b3.gif','images/b4.gif','images/b5.gif','images/b6.gif','images/b7.gif','images/bg.gif','images/bg_over.gif','images/bg_sel.gif']; var chess_obj = new ChessClass(); window.onload = function(){ $('init_btn').onclick = function(){ chess_obj.init(); } var callback = function(){ chess_obj.init(); } img_preload(gameimg, callback); } // chess class function ChessClass(){ this.chess = []; this.boardrows = 4; this.boardcols = 8; this.area = 82; this.player = 1; // 1:red 2:green this.selected = null; // selected chess this.chesstype = ['', 'a', 'b']; this.isover = 0; } // init ChessClass.prototype.init = function(){ this.reset_grade(); this.create_board(); this.create_chess(); this.create_event(); this.player = 1; this.selected = null; this.isover = 0; disp('init_div','hide'); } // create board ChessClass.prototype.create_board = function(){ var board = ''; for(var i=0; i<this.boardrows; i++){ for(var j=0; j<this.boardcols; j++){ board = board + '<div id="' + i + '_' + j + '"><img src="images/chessbg.gif" /></div>'; } } $('board').innerHTML = board; $('board').style.width = this.boardcols * (this.area + 2) + 'px'; $('board').style.height = this.boardrows * (this.area + 2) + 'px'; } // create random chess ChessClass.prototype.create_chess = function(){ // 32 chesses var chesses = ['a1','b7','a2','b7','a2','b7','a3','b7','a3','b7','a4','b6','a4','b6','a5','b5', 'a5','b5','a6','b4','a6','b4','a7','b3','a7','b3','a7','b2','a7','b2','a7','b1']; this.chess = []; while(chesses.length>0){ var rnd = Math.floor(Math.random()*chesses.length); var tmpchess = chesses.splice(rnd, 1).toString(); this.chess.push({'chess':tmpchess, 'type':tmpchess.substr(0,1), 'val':tmpchess.substr(1,1), 'status':0}); } } // create event ChessClass.prototype.create_event = function(){ var self = this; var chess_area = $_tag('div', 'board'); for(var i=0; i<chess_area.length; i++){ chess_area[i].onmouseover = function(){ // mouseover if(this.className!='onsel'){ this.className = 'on'; } } chess_area[i].onmouseout = function(){ // mouseout if(this.className!='onsel'){ this.className = ''; } } chess_area[i].onclick = function(){ // onclick self.action(this); } } } // id change index ChessClass.prototype.getindex = function(id){ var tid = id.split('_'); return parseInt(tid[0])*this.boardcols + parseInt(tid[1]); } // index change id ChessClass.prototype.getid = function(index){ return parseInt(index/this.boardcols) + '_' + parseInt(index%this.boardcols); } // action ChessClass.prototype.action = function(o){ if(this.isover==1){ // game over return false; } var index = this.getindex(o.id); if(this.selected == null){ // 未选过棋子 if(this.chess[index]['status'] == 0){ // not opened this.show(index); }else if(this.chess[index]['status'] == 1){ // opened if(this.chess[index]['type'] == this.chesstype[this.player]){ this.select(index); } } }else{ // 已选过棋子 if(index != this.selected['index']){ // 與selected不是同一位置 if(this.chess[index]['status'] == 0){ // 未打开的棋子 this.show(index); }else if(this.chess[index]['status'] == -1){ // 點空白位置 this.move(index); }else{ // 點其他棋子 if(this.chess[index]['type']==this.chesstype[this.player]){ this.select(index); }else{ this.kill(index); } } } } } // show chess ChessClass.prototype.show = function(index){ $(this.getid(index)).innerHTML = '<img src="images/' + this.chess[index]['chess'] + '.gif" />'; this.chess[index]['status'] = 1; // opened if(this.selected!=null){ // 清空選中 $(this.getid(this.selected.index)).className = ''; this.selected = null; } this.change_player(); this.gameover(); } // select chess ChessClass.prototype.select = function(index){ if(this.selected!=null){ $(this.getid(this.selected['index'])).className = ''; } this.selected = {'index':index, 'chess':this.chess[index]}; $(this.getid(index)).className = 'onsel'; } // move chess ChessClass.prototype.move = function(index){ if(this.beside(index)){ this.chess[index] = {'chess':this.selected['chess']['chess'], 'type':this.selected['chess']['type'], 'val':this.selected['chess']['val'], 'status':this.selected['chess']['status']}; this.remove(this.selected['index']); this.show(index); } } // kill chess ChessClass.prototype.kill = function(index){ if(this.beside(index)==true && this.can_kill(index)==true){ this.chess[index] = {'chess':this.selected['chess']['chess'], 'type':this.selected['chess']['type'], 'val':this.selected['chess']['val'], 'status':this.selected['chess']['status']}; this.remove(this.selected['index']); var killed = this.player==1? 2 : 1; $('grade_num' + killed).innerHTML = parseInt($('grade_num' + killed).innerHTML)-1; this.show(index); } } // remove chess ChessClass.prototype.remove = function(index){ this.chess[index]['status'] = -1; // empty $(this.getid(index)).innerHTML = ''; $(this.getid(index)).className = ''; } /* check is beside * @param index 目標棋子index * @param selindex 执行的棋子index,可为空, 为空则读取选中的棋子 */ ChessClass.prototype.beside = function(index,selindex){ if(typeof(selindex)=='undefined'){ if(this.selected!=null){ selindex = this.selected['index']; }else{ return false; } } if(typeof(this.chess[index])=='undefined'){ return false; } var from_info = this.getid(selindex).split('_'); var to_info = this.getid(index).split('_'); var fw = parseInt(from_info[0]); var fc = parseInt(from_info[1]); var tw = parseInt(to_info[0]); var tc = parseInt(to_info[1]); if(fw==tw && Math.abs(fc-tc)==1 || fc==tc && Math.abs(fw-tw)==1){ // row or colunm is same and interval=1 return true; }else{ return false; } } /* check can kill * @param index 被消灭的棋子index * @param selindex 执行消灭的棋子index,可为空, 为空则读取选中的棋子 */ ChessClass.prototype.can_kill = function(index,selindex){ if(typeof(selindex)=='undefined'){ // 没有指定执行消灭的棋子 if(this.selected!=null){ // 有选中的棋子 selindex = this.selected['index']; }else{ return false; } } if(this.chess[index]['type']!=this.chesstype[this.player]){ if(parseInt(this.chess[selindex]['val'])==7 && parseInt(this.chess[index]['val'])==1){ // 7 can kill 1 return true; }else if(parseInt(this.chess[selindex]['val'])==1 && parseInt(this.chess[index]['val'])==7){ // 1 can't kill 7 return false; }else if(parseInt(this.chess[selindex]['val']) <= parseInt(this.chess[index]['val'])){ // small kill big return true; } } return false; } // change player ChessClass.prototype.change_player = function(){ if(this.player == 1){ this.player = 2; // to green $('grade_img2').className = 'img_on'; $('grade_img1').className = 'img'; }else{ this.player = 1; // to red $('grade_img1').className = 'img_on'; $('grade_img2').className = 'img'; } } // reset grade ChessClass.prototype.reset_grade = function(){ $('grade_img1').className = 'img_on'; $('grade_img2').className = 'img'; $('grade_num1').innerHTML = $('grade_num2').innerHTML = 16; $('grade_res1').className = $('grade_res2').className = 'none'; $('grade_res1').innerHTML = $('grade_res2').innerHTML = ''; } // game over ChessClass.prototype.gameover = function(){ if($('grade_num1').innerHTML==0 || $('grade_num2').innerHTML==0){ // 任一方棋子为0 this.isover = 1; this.show_grade(); disp('init_div','show'); }else{ if(this.can_action()==false){ this.isover = 1; this.show_grade(); disp('init_div','show'); } } } // show grade ChessClass.prototype.show_grade = function(){ var num1 = parseInt($('grade_num1').innerHTML); var num2 = parseInt($('grade_num2').innerHTML); if(num1>num2){ // 红方胜 $('grade_res2').innerHTML = 'LOSS'; $('grade_res2').className = 'loss'; $('grade_res1').innerHTML = 'WIN'; $('grade_res1').className = 'win'; }else if(num1<num2){ // 黑方胜 $('grade_res1').innerHTML = 'LOSS'; $('grade_res1').className = 'loss'; $('grade_res2').innerHTML = 'WIN'; $('grade_res2').className = 'win'; }else{ // 平局 $('grade_res1').innerHTML = $('grade_res2').innerHTML = 'DRAW'; $('grade_res1').className = $('grade_res2').className = 'draw'; } } // check chess can action ChessClass.prototype.can_action = function(){ var chess = this.chess; for(var i=0,max=chess.length; i<max; i++){ if(chess[i].status==0){ // 有未翻开的棋子 return true; }else{ if(chess[i].status==1 && chess[i].type==this.chesstype[this.player]){ // 己方已翻开的棋子 if(this.beside(i-this.boardcols, i) && (chess[i-this.boardcols].status==-1 || this.can_kill(i-this.boardcols,i) )){ // 上 return true; } if(this.beside(i+this.boardcols, i) && (chess[i+this.boardcols].status==-1 || this.can_kill(i+this.boardcols,i) )){ // 下 return true; } if(this.beside(i-1, i) && (chess[i-1].status==-1 || this.can_kill(i-1,i) )){ // 左 return true; } if(this.beside(i+1, i) && (chess[i+1].status==-1 || this.can_kill(i+1,i) )){ // 右 return true; } } } } return false; } /** common function */ // get document.getElementBy(id) function $(id){ this.id = id; return document.getElementById(id); } // get document.getElementsByTagName function $_tag(name, id){ if(typeof(id)!='undefined'){ return $(id).getElementsByTagName(name); }else{ return document.getElementsByTagName(name); } } /* div show and hide * @param id dom id * @param handle show or hide */ function disp(id, handle){ if(handle=='show'){ $(id).style.display = 'block'; }else{ $(id).style.display = 'none'; } } /* img preload * @param img 要加载的图片数组 * @param callback 图片加载成功后回调方法 */ function img_preload(img, callback){ var onload_img = 0; var tmp_img = []; for(var i=0,imgnum=img.length; i<imgnum; i++){ tmp_img[i] = new Image(); tmp_img[i].src = img[i]; if(tmp_img[i].complete){ onload_img ++; }else{ tmp_img[i].onload = function(){ onload_img ++; } } } var et = setInterval( function(){ if(onload_img==img.length){ // 定时器,判断图片完全加载后调用callback clearInterval(et); callback(); } },200); }
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この記事で説明されている内容は、JavaScript ゲーム デザインを学ぶすべての人にとって一定の参考価値があると信じています。