flex中Away3D 鼠标到Mesh物体上，物体显示边框、高亮显示

实现方式是监听鼠标的移入移出事件，动态地设置 Mesh 的 showBounds 属性。效果图如下：

同样是监听鼠标的移入移出事件。只不过我们这边除了原始的材质贴图外，还要准备一张高亮的贴图（把原始贴图调整下亮度即可）。鼠标移入移出时，动态改变 mesh.material

package{
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.events.MouseEvent;

import away3d.containers.View3D;
import away3d.controllers.HoverController;
import away3d.entities.Mesh;
import away3d.events.MouseEvent3D;
import away3d.materials.TextureMaterial;
import away3d.primitives.CubeGeometry;
import away3d.utils.Cast;

[SWF(frameRate="60", backgroundColor="#FFFFFF")]
public class S5 extends Sprite {

private var _view3D:View3D;
private var cameraController:HoverController;//360全景展示相机控制器

//普通 贴图
[Embed(source="assets/cubeTexture3.jpg")]
private var cubeTextureClass : Class;

//高亮贴图
[Embed(source="assets/cubeTexture3_light.jpg")]
private var cubeTextureLightClass : Class;

private var cubeTextureMaterial:TextureMaterial;

private var cubeTextureLightMaterial:TextureMaterial;

private var _lastX:Number = 0;
private var _lastY:Number = 0;

public function S5() {
initEngine();
initMaterials();
initObjects();
initListeners();
}

/**
* 初始化引擎
*/
private function initEngine():void
{
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;

// 创建一个视口
_view3D = new View3D();
_view3D.antiAlias = 4; //设置抗锯齿级别

//初始化摄像头
cameraController = new HoverController(_view3D.camera);
cameraController.tiltAngle = 15;

addChild(_view3D);
}

/**
* 初始化材质
*/
private function initMaterials():void
{
cubeTextureMaterial = new TextureMaterial(Cast.bitmapTexture(cubeTextureClass));

//高亮皮肤
cubeTextureLightMaterial = new TextureMaterial(Cast.bitmapTexture(cubeTextureLightClass));
}

/**
* 初始化物体
*/
private function initObjects():void
{
// 在三维舞台中创建一个方块
var cube1:Mesh = new Mesh(new CubeGeometry(200, 200, 200, 1, 1, 1, false),
cubeTextureMaterial);
_view3D.scene.addChild(cube1);

//开启鼠标事件支持
cube1.mouseEnabled = true;
//添加 监听
cube1.addEventListener(MouseEvent3D.MOUSE_OVER, cubeMouseOver);
cube1.addEventListener(MouseEvent3D.MOUSE_OUT, cubeMouseOut);
}

//鼠标移入
private function cubeMouseOver(event:MouseEvent3D):void{
var mesh:Mesh = event.object as Mesh;
mesh.material = cubeTextureLightMaterial;
}

//鼠标移出
private function cubeMouseOut(event:MouseEvent3D):void{
var mesh:Mesh = event.object as Mesh;
mesh.material = cubeTextureMaterial;
}

/**
* 初始化监听
*/
private function initListeners():void
{
addEventListener(Event.ENTER_FRAME, _onEnterFrame);
//鼠标事件监听
stage.addEventListener(MouseEvent.MOUSE_DOWN, onMouseDown);
stage.addEventListener(MouseEvent.MOUSE_UP, onMouseUp);
stage.addEventListener(MouseEvent.MOUSE_WHEEL,onWheel);
stage.addEventListener(Event.RESIZE, onResize);
onResize();
}

/**
* 渲染视图
*/
private function _onEnterFrame(e:Event):void
{
//渲染视图
_view3D.render();
}

/**
* 使用舞台大小一直全屏
*/
private function onResize(event:Event = null):void
{
_view3D.width = stage.stageWidth;
_view3D.height = stage.stageHeight;
}

/**
* 鼠标滚轮事件
*/
private function onWheel(e:MouseEvent):void
{
if(e.delta > 0){
if(cameraController.distance < 1000)
cameraController.distance += 100;
}else{
if(cameraController.distance > 600)
cameraController.distance -= 100;
}
}

/**
* 鼠标按下事件
*/
private function onMouseDown(event:MouseEvent):void
{
_view3D.stage.addEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
_lastX = _view3D.mouseX;
_lastY = _view3D.mouseY;
}

/**
* 鼠标弹起事件
*/
private function onMouseUp(event:MouseEvent):void
{
_view3D.stage.removeEventListener(MouseEvent.MOUSE_MOVE, mouseMoveHandler);
}

/**
* 鼠标移动事件
*/
private function mouseMoveHandler(event:MouseEvent):void
{
//移动摄像机
var dx:Number = _view3D.mouseX - _lastX;
var dy:Number = _view3D.mouseY - _lastY;

cameraController.panAngle += dx;
cameraController.tiltAngle += dy;

_lastX = _view3D.mouseX;
_lastY = _view3D.mouseY;
}
}
}