车运动规则(基本)

自己做的判定!大虾们就不用看了,只供新手参考!先看看效果: 代码如下： //定义速度变量 var speed:Number = 0; var car_speed:Number = 0; //增加键盘侦听器 Key.addListener(_root.road_mc); road_mc.onEnterFrame = function() { //键盘UP键按下 if (Key.isDown(38)) { if (road_mc._y<-80) { road_mc._y += speed; speed_func(); car_speed_func(); //trace(speed); car_mc._y>=166 ? car_mc._y -= car_speed : 正常; } else { road_mc._y = -437; } //键盘UP键放开 } else if (road_mc._y<-80) { if (speed>=0.25) { speed -= 0.25; road_mc._y += speed; //trace(speed) //trace(road_mc._y) } } else { road_mc._y = -437; } //键盘LEFT键 if (Key.isDown(37)) { if (car_mc._x>76) { speed<3 ? car_speed=speed : car_speed=3; car_mc._x -= car_speed; } } //键盘RIGHT键 if (Key.isDown(39)) { if (car_mc._x<378) { speed<3 ? car_speed=speed : car_speed=3; car_mc._x += car_speed; //trace(car_speed); } } //键盘DOWN键 if (Key.isDown(40)) { if (speed>0) { car_mc<331 ? car_mc._y += 5 : 正常; speed -= 2; } else { speed = 0; } } //加速"shift"键 if (Key.isDown(Key.SHIFT) && !this["press"]) { this["press"] = true; car_mc.play(); speed<150 ? speed += 50 : 正常; var This = this; this["interval"] = setTimeout(function () { car_mc.gotoAndStop(1), This["press"]=false; }, 5000); //设置延时5000毫秒 } }; //声明函数,按当前速度渐加 function speed_func() { if (speed<10) { speed += 0.25; } else if (speed<20) { speed += 0.5; } else if (speed<30) { speed += 1; } else if (speed<50) { speed += 1.5; } else if (speed<80) { speed += 3; } else if (speed<0) { speed = 0; } } 源文件下载： 车运动规则.rar