flash开源游戏引擎pushButton学习笔记(5)以xml组装游戏

以下是一个完整的以xml组装游戏的实例：整个项目文件结构如下：

1、assets/Level/common.xml 文件为pushButton引擎当中的组件组装文件，以下为该文件代码：

<!DOCTYPE things PUBLIC "HJKHKJ" "PBEDTD.dtd">
<things>
    <entity name="SpatialDB">
        <component name="Manager" type="com.pblabs.box2D.Box2DManagerComponent">
            
        </component>
    </entity>
    
    <entity name="Scene">
        <component name="Scene" type="com.pblabs.rendering2D.DisplayObjectScene">
            <trackObject componentReference="FeiJi"/>
            <sceneViewName>MainApp</sceneViewName>
        </component>
    </entity>
    
    
    
    <entity name="BG">
        <component name="Spatial" type="com.pblabs.rendering2D.SimpleSpatialComponent">
            <spatialManager componentReference="SpatialDB"/>
            <position>
                <x>0</x>
                <y>0</y>
            </position>
            <size type="">
                <x>896</x>
                <y>640</y>
            </size>
        </component>
        
        <component name="Render" type="com.pblabs.rendering2D.SpriteRenderer">
            <fileName>
                assets/image/bgs.jpg
            </fileName>
            <positionProperty>@Spatial.position</positionProperty>
            <sizeProperty>@Spatial.size</sizeProperty>
            <scene componentReference="Scene"/>
        </component>
    </entity>
    
    
    <entity name="FeiJi">
        <component name="Spatial" type="com.pblabs.rendering2D.SimpleSpatialComponent">
            <position>
                <x>0</x>
                <y>0</y>
            </position>
            <spatialManager componentReference="SpatialDB"/>
        </component>
        
        <component name="Render" type="com.pblabs.rendering2D.SpriteRenderer">
            <fileName>assets/image/fanship.png</fileName>
            <positionProperty>@Spatial.position</positionProperty>
            <sizeProperty>@Spatial.size</sizeProperty>
            <scene componentReference="Scene"/>
        </component>
        
        <component name="Controller" type="controller.FeijiController">
            <positionReference>@Spatial.position</positionReference>
        </component>
        
    </entity>
    
    
    <entity name="HuaHua">
        <component name="Spatial" type="com.pblabs.rendering2D.SimpleSpatialComponent">
            <position>
                <x>-400</x>
                <y>0</y>
            </position>
            <size type="">
                <x>60</x>
                <y>60</y>
            </size>
            <spatialManager componentReference="SpatialDB"/>
        </component>
        
        <component name="Render" type="com.pblabs.rendering2D.SpriteRenderer">
            <fileName>assets/image/HH_baihe.png</fileName>
            <positionProperty>@Spatial.position</positionProperty>
            <sizeProperty>@Spatial.size</sizeProperty>
            <scene componentReference="Scene"/>
        </component>
        <component name="Controller" type="controller.HuaHuaController">
            <input childType="com.pblabs.engine.core.InputMap">
                <GoUp>UP</GoUp>
                <GoDown>DOWN</GoDown>
            </input>
        </component>
    </entity>
    
    <group name="Common">
        <objectReference name="SpatialDB"/>
        <objectReference name="Scene"/>
        <objectReference name="BG"/>
        <objectReference name="FeiJi"/>
        <objectReference name="HuaHua"/>
    </group>
</things>

2、MainApp 游戏运行的主类，也就是文档类

package {
    import com.pblabs.box2D.Box2DManagerComponent;
    import com.pblabs.engine.PBE;
    import com.pblabs.rendering2D.DisplayObjectScene;
    import com.pblabs.rendering2D.SimpleSpatialComponent;
    import com.pblabs.rendering2D.SpriteRenderer;
    import com.pblabs.rendering2D.ui.SceneView;
    
    import controller.FeijiController;
    import controller.HuaHuaController;
    
    import flash.display.Sprite;

    public class MainApp extends Sprite
    {
        public function MainApp()
        {
            trace("hello");
            PBE.startup(this);
            createScene();
            loadLevel();
            
        }
        
        private function createScene():void
        {
            var scene:SceneView=new SceneView();
            scene.width=1024;
            scene.height=600;
            PBE.initializeScene(scene);
            scene.name="MainApp";
        }
        
        
        
        private function loadLevel():void
        {
            PBE.levelManager.addFileReference(0,"assets/Level/common.xml");
            PBE.levelManager.addGroupReference(0,"Common");
            
            PBE.levelManager.loadLevel(0);
            PBE.levelManager.start();
            
        }
        
        
        
        
        private function register():void
        {
            PBE.registerType(com.pblabs.rendering2D.DisplayObjectScene);
            //PBE.registerType();
            PBE.registerType(Box2DManagerComponent);
            PBE.registerType(SimpleSpatialComponent);
            PBE.registerType(SpriteRenderer);
            PBE.registerType(FeijiController)
            PBE.registerType(HuaHuaController);
        }
    }
}

3、FeijiController是消费机的控制器组件

package controller
{
    import com.pblabs.engine.PBE;
    import com.pblabs.engine.components.TickedComponent;
    import com.pblabs.engine.core.InputKey;
    import com.pblabs.engine.entity.PropertyReference;
    
    import flash.geom.Point;

    public class FeijiController extends TickedComponent
    {
        
        public var positionReference:PropertyReference;
        
        
        
        public function FeijiController()
        {
            super();
        }
        
        public override function onTick(deltaTime:Number):void
        {
            var position:Point=owner.getProperty(positionReference);
            
            if(PBE.isKeyDown(InputKey.RIGHT))
            {
                position.x+=15;
            }
            
            if(PBE.isKeyDown(InputKey.LEFT))
            {
                position.x-=15;
            }
            
            if(PBE.isKeyDown(InputKey.UP))
            {
                position.y-=15;
            }
            if(PBE.isKeyDown(InputKey.DOWN))
            {
                position.y+=15;
            }
            
            
            
            
            
            
            
            if(position.x>375)
            {
                position.x=375;
            }else if(position.x<-375)
            {
                position.x=-375;
            }
            
            owner.setProperty(positionReference,position);
        }
        
    }
}

4、HuaHuaController是小花的控制器组件

package controller
{
    import com.pblabs.engine.components.TickedComponent;
    import com.pblabs.engine.core.InputMap;
    import com.pblabs.engine.entity.PropertyReference;
    
    import flash.geom.Point;

    public class HuaHuaController extends TickedComponent
    {
        
        private var _input:InputMap;
        
        public function get input():InputMap
        {
            return _input;
        }
        
        public function set input(value:InputMap):void
        {
            _input=value;
            if(_input!=null)
            {
                _input.mapActionToHandler("GoUp",onGoUpHandler);
                _input.mapActionToHandler("GoDown",onGoDownHandler);
            }
        }
        
        
        private function onGoUpHandler(value:Number):void
        {
            trace("向上");
            trace(value);
        }
        
        private function onGoDownHandler(value:Number):void
        {
            trace("乡下");
            trace(value);
        }
        
        
        
        
        
        public function HuaHuaController()
        {
            super();
        }
        
        public override function onTick(deltaTime:Number):void
        {
        } 
        
    }
}