JS小游戏之极速快跑源码详解_javascript技巧

本文实例讲述了JS小游戏的极速快跑源码，分享给大家供大家参考。具体如下：

游戏运行后如下图所示：

Javascript部分代码如下：

/** 极速快跑
* Author: fdipzone
* Date: 2012-07-15
* Ver: 1.0
*/

var gameimg = ['images/start.png', 'images/start_over.png', 'images/go.png', 'images/go_over.png', 'images/running.gif', 'images/run_start1.gif', 'images/run_start2.gif', 'images/run_start3.gif'];
var speed_obj = new SpeedClass();

window.onload = function(){
 var callback = function(){
 speed_obj.init();
 }
 img_preload(gameimg, callback);
}

// Speed Class
function SpeedClass(){
 this.levelset = [8,5,8,12]; // 难度参数
 this.playerlist = null; // 选手列表
 this.player = 0;  // 选中的选手
 this.level = 2;  // 难度
 this.lock = 0;  // 锁定
 this.isstart = 0;  // 是否开始
 this.isover = 0;  // 是否结束
}

// init
SpeedClass.prototype.init = function(){
 this.reset();
 this.create_player();
 this.create_event();
}

// reset
SpeedClass.prototype.reset = function(){
 this.player = 0;
 this.level = $('level').value; // level
 this.playerlist = $_tag('li', 'playerlist');
 for(var i=0; i';
 playerlist[i] = '
' + i + '
';
 }
 $('runway').innerHTML = runway.join('');
 $('playerlist').innerHTML = playerlist.join('');
 runway = null;
 playerlist = null;
}

// create event
SpeedClass.prototype.create_event = function(){
 var self = this;
 this.playerlist = $_tag('li', 'playerlist');
 for(var i=0; i=745){ 
   clearInterval(et);
   self.isover = 1;
   self.gameover(o.id);
  }
  }
 }
 step ++;
 }, 350)
}

// go
SpeedClass.prototype.go = function(){
 if(this.isstart==1 && this.isover==0){
 var o = $('player' + this.player);
 var exert = Math.floor(Math.random()*3)+2; // 2-5
 o.style.marginLeft = parseInt(o.style.marginLeft) + exert + 'px';
 }
 return false;
}

// gameover
SpeedClass.prototype.gameover = function(id){
 id = id.replace('player','');
 var self = this;
 var msg = '';
 if(id==this.player){
 msg = "恭喜你,你支持的选手获得胜利\n\n";
 }else{
 msg = "很遗憾,你支持的选手没有获得胜利,获胜的是" + id + "号选
\n";
 }
 if(confirm(msg + '是否重新开始?')==true){
 setTimeout(function(){
  self.init();
 },1000);
 }else{
 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
* @param classname
*/
function disp(id, handle, classname){
 if(handle=='show'){
 $(id).style.display = 'block';
 }else{
 $(id).style.display = 'none'; 
 }
 if(typeof(classname)!='undefined'){
 $(id).className = classname;
 }
}

/* 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

完整实例代码点击此处本站下载。

相信本文所述对大家的javascript游戏设计有一定的借鉴价值。