Phiên bản đầy đủ: jsB@nk » Trò chơi » Kĩ năng » Rắn săn mồi
URL: https://www.javascriptbank.com/cross-browser-black-snake-game.html
Một đoạn mã JavaScript cho trò chơi Rắn săn mồi khác có thể chơi trực tiếp trên trang web. Đoạn mã này tuy đơn giản nhưng khá chuẩn do được viết theo mô hình prototype và hướng đối tượng.
Phiên bản đầy đủ: jsB@nk » Trò chơi » Kĩ năng » Rắn săn mồi
URL: https://www.javascriptbank.com/cross-browser-black-snake-game.html
<style type="text/css">.board{width: 399px;background-color: lightgrey;border: 1px solid gray;position: relative;margin-left: 5px;margin-top: 5px;}#board{height: 399px;border-bottom: 0px;}#apple{position: absolute;background-color: red;height: 7px;width: 7px;overflow: hidden;}.snake{position: absolute;top: 200px;left: 200px;background-color: black;height: 7px;width: 7px;overflow: hidden;}.snake2{position: absolute;top: -10px;left: -10px;background-color: black;height: 7px;width: 7px;overflow: hidden;}#score{height: 50px;margin-top: 0px;}#cscore{color: black;padding-left: 10px;float: left;width: 25%;font-size: xx-large;}#buttons{float: right;width: 50%;text-align: right;padding-top: 10px;}#notice{position: absolute;top: 1em;left: 1em;right: 1em;text-align: center;font-size: 150%;}#i2{position: absolute;bottom: 1em;left: 1em;right: 1em;text-align: center;font-size: 95%;}</style><script type="text/javascript">/***************************************************** Cross Browser Snake game- By Brady Mulhollem- http://www.bradyontheweb.com/****************************************************/function cbsnake(){//Pixels to move at oncethis.jump = 8;//Size of snake. Make this one less than jump. Doesn't have to be,but adds good effectthis.sos = 7;//Size of board//DANGER!!! this.sofb must be EVENLY dividable by this.jump DANGER!!!!this.sofb = 400;//Set things upthis.daway = this.sofb - this.jump;this.correct = new Array();this.correct[0] = 0;while(this.correct[this.correct.length -1] != this.daway){this.correct[this.correct.length] = this.correct[this.correct.length -1]+this.jump}this.zero = 0;var gameboard = ' <div class="board" id="board"> <div id="i2"> This is a simple game of Snake. Select a speed then use your arrow keys to attempt and eat the apple(red block), but watch out for the walls and yourself. At any time you can pause the game by pressing the space bar. More snake games are available at <a href="http://www.javascriptbank.com">jsB@nk.com</a> </div> </div><div class="board" id="score"> <span id="cscore">0</span> <span id="buttons"> <button type="button" id="slow" onClick="snake.slow()">Slow</button> <button type="button" id="medium" onClick="snake.medium()">Medium</button> <button type="button" id="fast" onClick="snake.fast()">Fast</button> </span></div>';document.write(gameboard);}cbsnake.prototype.setup = function(setspeed){var thisObj = this;//Score...this.score = 0;//Snake Directionthis.sdir = 'none';this.sdirb = 'none'; this.sdirp = 'none';//Snake arraysthis.ctop = new Array();this.cleft = new Array();//Top of snake classthis.ctop[0] = 200;this.ctop[1] = -8;//Left of Snake classthis.cleft[0] = 200;this.cleft[1] = -8;//current top of applethis.atop = 0;//current left of applethis.aleft = 0;//Milliseconds between movethis.speed = setspeed;document.getElementById('board').innerHTML = '<div id="apple"></div><div id="snake0" class="snake"></div><div id="snake1" class="snake"></div>';this.moveapple();this.stopgame = false;setTimeout(function(){ thisObj.msnake() },this.speed);document.onkeydown = function(e){ thisObj.snakedir(e) };}cbsnake.prototype.slow = function(){this.setup(100);this.buttons('true');document.getElementById('slow').blur();}cbsnake.prototype.medium = function(){this.setup(70);this.buttons('true');document.getElementById('medium').blur();}cbsnake.prototype.fast = function(){this.setup(30);this.buttons('true');document.getElementById('fast').blur();}cbsnake.prototype.rannum = function(num1,num2){num1 = parseInt(num1);num2 = parseInt(num2);var generator = Math.random()*(Math.abs(num2-num1));generator = Math.round(num1+generator);return generator;}cbsnake.prototype.moveapple = function(){var usethis = false;while(!usethis){this.atop = this.correct[this.rannum(0,this.correct.length-1)];this.aleft = this.correct[this.rannum(0,this.correct.length-1)];if(this.numInArray(this.ctop,this.cleft,this.atop,this.aleft) == 0){usethis = true;}}document.getElementById('apple').style.top = this.atop+"px";document.getElementById('apple').style.left = this.aleft+"px";}cbsnake.prototype.snakedir = function(e){if(!e){//IE...e = window.event;}switch(e.keyCode){case 38:if(this.sdir != 'down' && this.sdirp != 'down'){this.sdirb = 'up';this.sdirp = 'up';}break;case 40:if(this.sdir != 'up' && this.sdirp != 'up'){this.sdirb = 'down';this.sdirp = 'down';}break;case 37:if(this.sdir != 'right' && this.sdirp != 'right'){this.sdirb = 'left';this.sdirp = 'left';}break;case 39:if(this.sdir != 'left' && this.sdirp != 'left'){this.sdirb = 'right';this.sdirp = 'right';}break;case 32:if(this.sdir == 'none' && this.sdirp != 'none'){this.sdirb = this.sdirp;this.sdirp = 'none';}else{this.sdirp = this.sdir;this.sdirb = 'none';}break;}return false;}cbsnake.prototype.msnake = function(){if(this.stopgame === false){if(this.sdir != 'none'){this.moveall();}var thisObj = this;switch(this.sdir){case 'up':this.ctop[0] = this.ctop[0] - this.jump;document.getElementById('snake0').style.top = this.ctop[0]+"px";if((this.ctop[0] == this.zero && this.sdirb == 'up') || this.ctop[0] < this.zero){this.gover();}break;case 'down':this.ctop[0] = this.ctop[0] + this.jump;document.getElementById('snake0').style.top = this.ctop[0]+"px";if((this.ctop[0] == this.daway && this.sdirb == 'down') || this.ctop[0] > this.daway){this.gover();}break;case 'left':this.cleft[0] = this.cleft[0] - this.jump;document.getElementById('snake0').style.left = this.cleft[0]+"px";if((this.cleft[0] == this.zero && this.sdirb == 'left') || this.cleft[0] < this.zero){this.gover();}break;case 'right':this.cleft[0] = this.cleft[0] + this.jump;document.getElementById('snake0').style.left = this.cleft[0]+"px";if((this.cleft[0] == this.daway && this.sdirb == 'right') || this.cleft[0] > this.daway){this.gover();}break;}if(this.sdir != 'none'){this.hitself();this.happle();}this.sdir = this.sdirbsetTimeout(function(){ thisObj.msnake() },this.speed);}}cbsnake.prototype.gover = function(){if(!this.stopgame){this.stopgame = true;var inner = document.getElementById('board').innerHTML;document.getElementById('board').innerHTML = inner+'<div id="notice">Game Over! Your Score was '+this.score+'</div><div id="i2">This is a simple game of Snake. Select a speed then use your arrow keys to attempt and eat the apple(red block), but watch out for the walls and yourself. At any time you can pause the game by pressing the space bar. More snake games are available at <a href="http://www.javascriptbank.com">jsB@nk.com</a></div>';document.getElementById('apple').style.backgroundColor = '#D7BEBE';for(i=0;i<this.cleft.length;i++){document.getElementById('snake'+i).style.backgroundColor = '#BEBEBE';}this.buttons('');}}cbsnake.prototype.happle = function(){if(this.atop == this.ctop[0] && this.aleft == this.cleft[0]){//HIT!!!this.score++;document.getElementById('cscore').innerHTML = this.score;this.moveapple();this.addsnake();}}cbsnake.prototype.addsnake = function(){var newsnake = document.createElement('div');var newid = 'snake'+this.cleft.length;newsnake.setAttribute('id',newid);//this crap is for IE. I would rather add the class name.newsnake.style.position = 'absolute';newsnake.style.top = '-10px';newsnake.style.left = '-10px';newsnake.style.display = 'none';newsnake.style.backgroundColor = 'black';newsnake.style.height = '7px';newsnake.style.width = '7px';newsnake.style.overflow = 'hidden';document.getElementById('board').appendChild(newsnake);this.cleft[this.cleft.length] = -10;this.ctop[this.ctop.length] = -10;}cbsnake.prototype.moveall = function(){var i = this.ctop.length - 1;while(i != 0){document.getElementById('snake'+i).style.top = document.getElementById('snake'+(i-1)).style.top;document.getElementById('snake'+i).style.left = document.getElementById('snake'+(i-1)).style.left;document.getElementById('snake'+i).style.display = 'block';this.ctop[i] = this.ctop[i-1];this.cleft[i] = this.cleft[i-1];i = i - 1;}}cbsnake.prototype.numInArray = function(array,array2,value,value2){var n = 0;for (var i=0; i < array.length; i++) {if (array[i] === value && array2[i] === value2) {n++;}}return n;}cbsnake.prototype.hitself = function(){if(this.numInArray(this.ctop,this.cleft,this.ctop[0],this.cleft[0]) > 1){this.gover();}}cbsnake.prototype.buttons = function(setto){document.getElementById('slow').disabled = setto;document.getElementById('medium').disabled = setto;document.getElementById('fast').disabled = setto;}</script><script type="text/javascript">var snake = new cbsnake();</script>