使用FLEX和 Actionscript 开发FLASH游戏（六）-5

使用FLEX和 Actionscript 开发FLASH游戏（六）-5

 

使用 FLEX和 Actionscript开发 FLASH 游戏 -碰撞检测（第五页）
Player.as
package
{
    import flash.events.*;
    import flash.geom.*;
    import mx.core.*;
    public class Player extends GameObject
    {
        protected static const TimeBetweenShots:Number=0.25;
        protected var shooting:Boolean=false;
        protected var timeToNextShot:Number=0;
        public function Player()
        {
        }
        public function startupPlayer():void
        {
            startupGameObject(ResourceManager.BrownPlaneGraphics,new Point                                   (Application.application.width/2,Application.application.height/2),
            ZOrders.PlayerZOder);
            shooting=flase;
            timeToNextShot=0;
            this.collisionName=CollisionIdentifiers.PLAYER;
        }
        override public function shutdown():void
        {
            super.shutdown();
        }
        override public function enterFrame(dt:Number):void
        {
            super.enterFrame(dt);
            timeToNextShot-=dt;
            if(timeToNextShot<=0&&shooting)
            {
                timeToNextShot=TimeBetweenShots;
                var weapon:Weapon=Weapon.pool.ItemFromPool as Weapon;
                weapon.startupBasicWeapon(ResourceManager.TwoBulletsGraphics,
                new Point(position.x+graphics.bitmap.width/2-                ResourceManager.TwoBulletsGraphics.bitmap.width/2,position.y-                                graphics.bitmap.height+ResourceManager.TwoBulletsGraphics.bitmap.height*2),
                150,
                true);
            }
        }
        override public function mouseMove(event:MouseEvent):void
        {
            //move player to mouse position
            position.x=event.stageX;
            position.y=event.stageY;
            //keep player on the screen
            if(position.x<0)
                position.x=0;
            if(position.x>Application.application.width-graphics.bitmap.width)
                position.x=Application.application.width-graphics.bitmap.width;
            if(position.y<0)
                position.y=0;
            if(position.y>Application.application.height-graphics.bitmap.height)
                position.y=Application.application.height-graphics.bitmap.height;
        }
        override public function mouseDown(event:MouseEvent):void
        {
            shooting=true;
        }
        override public function mouseUp(event:MouseEvent):void
        {
            shooting=false;
        }
        override public function collision(other:GameObject):void
        {
            Level.Instance.levelEnd=true;
            this.shutdown();
        }
    }
}
如你所见，在游戏者类中做了两处改变来适应新的碰撞检测系统。第一处是在 startup 函数里我们设置了 collisionName(碰撞名 )。第二处是增加了碰撞函数，当检测到碰撞时会被 GameObjectManager类调用。这里我们注意到 Level类中 level应该通过设置 levelEnd为真而结束（因为游戏者被杀死了），我们通过调用 shutdown函数来把游戏者从游戏中删除。
敌机类和武器类中做的改变基本上是一样的，除了在碰撞函数中的修改 Level类的 levelEnd属性有点不同。为了简洁的缘故我不给出敌机类和武器类的代码——你能够在本篇的结尾处下载源代码自己做个比较。
我们必须做的最后的改变是 Level类。现在让我们看看它有哪些改变。

|  page: 1 2 3 4 5 6 | Next Page>