【转】游戏人物走动与场景自动滚动(滚屏)

测试要求:在库中建立人物和场景地图(大于一屏宽度) s h

 

代码类如下:

/* 这是一个用于游戏场景滚屏的代码,左右二个方向

See the book or site for more information */

package {
    import flash.display.*;
    import flash.events.*;
    import flash.utils.getTimer;

    public class mcMove extends MovieClip {
        private var moveLeft:Boolean=false;
        private var moveRight:Boolean=false;
        private var edgeDistance:Number=250;//主人公自由运动区域(背景图片不滚屏气凝神,左右二侧的距离)
        private var speed:Number=2;
        private var scene:MovieClip;//场景背景影片剪辑
        private var hero:MovieClip; //场景背景影片剪辑内部的主人公对象
        
        //
        public function mcMove():void{
            setMove(main,main.mc);
        }
        
        
        private function setMove(s:MovieClip,h:MovieClip) {
            if(s!=null&&h!=null){
                scene=s;//s和h为为中的人物和场景影片剪辑对象
                hero=h;
                initListener();
                trace("启动")
            }
        }
        
        
        private function initListener():void{
            
            this.addEventListener(Event.ENTER_FRAME,moveLoop);
            stage.addEventListener(KeyboardEvent.KEY_DOWN,keyDownFunction);
            stage.addEventListener(KeyboardEvent.KEY_UP,keyUpFunction);
            
        }
        
        
        // note key presses, set hero properties
        private function keyDownFunction(event:KeyboardEvent) {
            

            if (event.keyCode == 37) {
                moveLeft = true;
            } else if (event.keyCode == 39) {
                moveRight = true;
            } 
        }
        private function keyUpFunction(event:KeyboardEvent) {
            switch (event.keyCode) {
                case 37 :
                    moveLeft = false;
                    break;
                case 39 :
                    moveRight = false;
                    break;
            }
        }
        
        private function moveLoop(event:Event):void{
            if(moveLeft==true){
                if(hero.x-speed<hero.width/2){
                    hero.x=scene.mc.width/2;
                }else{
                    scene.mc.x-=speed;
                }
            }
            
            if(moveRight==true){
                if(hero.x+speed>scene.width-hero.width/2){
                    hero.x=scene.width-hero.width/2;
                }else{
                    hero.x+=speed;
                }
            }
            
            scrollWithHero();
            
        }
        
        //更新整个场景联合元件的坐标
        private function scrollWithHero() {
            var stagePosition:Number = scene.x+scene.mc.x;
            var rightEdge:Number = stage.stageWidth-edgeDistance;
            var leftEdge:Number = edgeDistance;
            
            if (stagePosition > rightEdge) {
                scene.x -= (stagePosition-rightEdge);
                if (scene.x < -(scene.width-stage.stageWidth)) {
                    scene.x = -(scene.width-stage.stageWidth);
                }
            }
            if (stagePosition < leftEdge) {
                scene.x += (leftEdge-stagePosition);
                if (scene.x > 0) {
                    scene.x = 0;
                }
            }
            
        }
        
    }
}