flex游戏引擎(PushButton)-简单移动飞机在背景上-优快云博客

HeroControllerComponent .as

//组件控制，包括键盘，移动

/*******************************************************************************
* PushButton Engine
* Copyright (C) 2009 PushButton Labs, LLC
* For more information see http://www.pushbuttonengine.com
*
* This file is licensed under the terms of the MIT license, which is included
* in the License.html file at the root directory of this SDK.
******************************************************************************/

package
{

import com.pblabs.engine.PBE;
import com.pblabs.engine.components.TickedComponent;
import com.pblabs.engine.entity.PropertyReference;
import com.pblabs.engine.core.InputKey;

import flash.geom.Point;

// Make a ticked component so that it can update itself every frame with onTick()
public class HeroControllerComponent extends TickedComponent
{
  // Keep a property reference to our entity's position.
  public var positionReference:PropertyReference;

  // onTick() is called every frame
  public override function onTick(tickRate:Number):void
  {

   var position:Point = owner.getProperty(positionReference);

   // Look at our input keys to see which direction we should move. Left is -x, right is +x.

   if (PBE.isKeyDown(InputKey.RIGHT))

   {

    // Move our hero to the right

     position.x += 15;

   }

   if (PBE.isKeyDown(InputKey.LEFT))

   {

    // Move our hero to the left

     position.x -= 15;

   }
   if (PBE.isKeyDown(InputKey.UP))

   {

    // Move our hero to the right

    position.y -= 15;

   }

   if (PBE.isKeyDown(InputKey.DOWN))

   {

    // Move our hero to the left

    position.y += 15;

   }

   // Finally, add some boundary limits so that we don't go off the edge of the screen.
   30.
   if (position.x > 375)

   {

    // Set our position at the wall edge

     position.x = 375;

   }

   else if (position.x < -375)

   {

    // Set our position at the wall edge

     position.x = -375;

   }
   if (position.y > 260)

   {

    // Set our position at the wall edge

    position.y = 260;

   }

   else if (position.y < -260)

   {

    // Set our position at the wall edge

    position.y = -260;

   }

   // Send our manipulated spatial variables back to the spatial manager

    owner.setProperty(positionReference, position);

  }
}
}

Lesson5Base.as

package
{
    import com.pblabs.engine.PBE;
    import com.pblabs.engine.entity.*;
    import com.pblabs.rendering2D.*;
    import com.pblabs.rendering2D.ui.*;

    import flash.display.Sprite;
    import flash.geom.Point;

    [SWF(width="800", height="600", frameRate="60")]
    public class Lesson5Base extends Sprite
    {
        public function Lesson5Base()
        {
            // Start up PBE
            PBE.startup(this);
   new MyRes();

            // Set up a simple scene entity
            createScene();

            // Create a simple avatar entity
            createHero();
   createBackground();

        }

        private function createScene():void
        {
            var sceneView:SceneView = new SceneView();                        // Make the SceneView
            sceneView.width = 800;
            sceneView.height = 600;

            PBE.initializeScene(sceneView);                                   // This is just a helper function that will set up a basic scene for us
        }



        private function createHero():void
        {
            var hero:IEntity = allocateEntity();                              // Allocate an entity for our hero avatar
//创造位置及尺寸信息的组件
   createSpatial( hero,

    // with location of 0,0...

    new Point(0, 0),
    new Point(50,50)

   );

            // Create an instance of our hero controller component
            var controller:HeroControllerComponent = new HeroControllerComponent();
            // Point the controller component to this entity's Spatial component for position information
            controller.positionReference = new PropertyReference("@Spatial.position");

            // Add the demo controller component to the Hero entity with the name "Controller"
            hero.addComponent( controller, "Controller" );



   // Create a simple render component to display our object
   var render:SpriteRenderer = new SpriteRenderer();
   // Tell the Render component to use one of the images embedded by our ResourceBundle
   render.fileName = "../assets/fanship.png";


   // Add the renderer to the scene.
   render.scene = PBE.scene;


   // Set our hero to render above the background.
   render.layerIndex = 10;

   //从空间组件中提取坐标信息
   // Point the render component to this entity's Spatial component for position information
   render.positionProperty = new PropertyReference("@Spatial.position");
   // Point the render component to this entity's Spatial component for size information
   render.sizeProperty = new PropertyReference("@Spatial.size");
   // Add our render component to the Hero entity with the name "Render"
   hero.addComponent( render, "Render" );

            hero.initialize("Hero");                                          // Register the entity with PBE under the name "Hero"
        }
  private function createBackground():void
  {

   // Allocate an entity for our background sprite

   var bg:IEntity = PBE.allocateEntity();

   // Add our spatial component to the background entity ...

    createSpatial( bg,

     // with location of 0,0...

     new Point(0, 0)

    );

   // Create a simple render component to display our object

   // Just like the hero, this also uses a SpriteRenderComponent

   var render:SpriteRenderer = new SpriteRenderer();

   // Tell the Render component to use one of the images embedded by our ResourceLinker

    render.fileName = "../assets/bg.jpg";

   // Set our background to render below the hero.

    render.layerIndex = 1;

   // Add the renderer to the scene.

    render.scene = PBE.scene;

   // Point the render component to this entity's Spatial component for position information

    render.positionProperty = new PropertyReference("@Spatial.position");

   // Add our render component to the BG entity with the name "Render"

    bg.addComponent( render, "Render" );

   // Register the entity with PBE under the name "BG"

    bg.initialize("BG");
             }

  private function createSpatial( ent:IEntity, pos:Point, size:Point = null ):void
  {
   //创建位置和尺寸信息组件，并加入到实体

   // Create our spatial component
   var spatial:SimpleSpatialComponent = new SimpleSpatialComponent();

   // Do a named lookup to register our background with the scene spatial database
   spatial.spatialManager = PBE.spatialManager;

   // Set our background position in space
   spatial.position = pos;

   if (size != null)
    spatial.size = size;

   ent.addComponent(spatial, "Spatial");
  }


    }
}

//引用的资源定义，能把资源包括图片放入发布后的swf文件

// ActionScript file
/*******************************************************************************
* PushButton Engine
* Copyright (C) 2009 PushButton Labs, LLC
* For more information see http://www.pushbuttonengine.com
*
* This file is licensed under the terms of the MIT license, which is included
* in the License.html file at the root directory of this SDK.
******************************************************************************/
//这个类非常重要，将完成图片资源打包进发布后的swf文件
package
{
import com.pblabs.engine.resource.*;

public class MyRes extends ResourceBundle
{
  [Embed(source="../assets/bg.jpg")]
  //resBg这个名称不重要，但必须保证唯一，必须要申明
  public var resBg:Class;

  [Embed(source="../assets/fanship.png")]
  //resShip这个名称不重要，但必须保证唯一，必须要申明
  public var resShip:Class;
}
}