flex游戏引擎(PushButton)--键盘控制组件-移动小球
Lesson4Base.as
/*******************************************************************************
* 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.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 Lesson4Base extends Sprite
{
public function Lesson4Base()
{
// Start up PBE
PBE.startup(this);
// Set up a simple scene entity
createScene();
// Create a simple avatar entity
createHero();
}
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
var spatial:SimpleSpatialComponent = new SimpleSpatialComponent();// Create our spatial component
spatial.position = new Point(0,0); // Set our hero's spatial position as 0,0
spatial.size = new Point(50,50); // Set our hero's size as 50,50
spatial.spatialManager = PBE.spatialManager;
hero.addComponent( spatial, "Spatial" ); // Add our spatial component to the Hero entity with the name "Spatial"
var render:SimpleShapeRenderer = new SimpleShapeRenderer(); // Create a renderer to display our object
render.fillColor = 0x0000FF0;
render.isCircle = true;
render.radius = 25;
render.lineSize = 2;
render.lineColor = 0x000000;
render.scene = PBE.scene; // Set which scene this is a part of
// 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 rotation information
render.rotationProperty = new PropertyReference("@Spatial.rotation");
hero.addComponent( render, "Render" ); // Add our render component to the Hero entity with the name "Render"
// 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" );
hero.initialize("Hero"); // Register the entity with PBE under the name "Hero"
}
}
}
HeroControllerComponent.as
/*******************************************************************************
* 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);
}
}
}