Away3D基础教程（四）：获取载入模型的每个面，并进行鼠标交互

南京交互式多媒体/多点触摸/三维虚拟现实/unity3D/Flash/Flex/ActionScript3 QQ:781444988

效果预览:

 

很多时候我们需要控制加载模型的多个面，并让其响应不同的鼠标事件，比如单独给某一个面换贴图，或者点击不同的面显示不同的内容等等。要想获取模型的每个面其实很简单，在加载模型的时候采用AssetEvent.ASSET_COMPLETE侦听器即可精确的获得模型的每个面，在加载的过程中，模型的每个面自动转换成mesh对象，对每一个mesh对象启用鼠标交互mesh.mouseEnabled = true;和添加侦听器即可使模型的每个面响应鼠标事件。

 

本例完整源码如下：

package  
{
    import away3d.cameras.Camera3D;
    import away3d.containers.View3D;
    import away3d.controllers.HoverController;
    import away3d.entities.Mesh;
    import away3d.events.LoaderEvent;
    import away3d.events.MouseEvent3D;
    import away3d.loaders.Loader3D;
    import away3d.materials.ColorMaterial;
    import flash.display.Sprite;
    import flash.events.Event;
    import flash.events.MouseEvent;
    import flash.display.*;
    import away3d.events.AssetEvent;
    import away3d.library.assets.AssetType;
    import away3d.loaders.parsers.Parsers;
    import flash.geom.Vector3D;
    import flash.text.TextField;
    
    /**
     * ...
     * @author yl
     */
    [SWF(width='800',height='600',frameRate="60", backgroundColor="0x000000")]
    public class MyAway3d_4 extends Sprite 
    {
        
        [Embed(source = "/../embeds/myqiu.awd", mimeType="application/octet-stream")]
        private static var _dModel:Class;
        
        [Embed(source = "../embeds/myAway3d_1.jpg")]
        private static var _img1:Class;
        
        private var _view:View3D;
        private var _camera:Camera3D;
        private var _hovController:HoverController;
        private var _loader3D:Loader3D;
        
        private var _meshArray:Array = [];
        private var _index:int = 1;
        
         private var _lastTiltAngle:Number; //camera变化前的X轴角度  
         private var _lastPanAngle:Number; //camera变化前的Y轴角度   
         private var _lastMouseX:Number; //鼠标移动之前的X轴坐标   
         private var _lastMouseY:Number; //鼠标移动之前的Y轴坐标  
         
         private var _move:Boolean;
         
         private var _infoText:TextField;

        
        public function MyAway3d_4() 
        {
             //侦听舞台初始化完毕
            if (stage) {
                init();
            }else {
                this.addEventListener(Event.ADDED_TO_STAGE, init);
            }
        }
        private function init(e:Event=null):void {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            this.removeEventListener(Event.ADDED_TO_STAGE, init);
            
            _infoText = new TextField();
            addChild(_infoText);
            _infoText.textColor = 0xFFFFFF;
            _infoText.selectable = false;
            _infoText.text = "选择的对象是：\nQQ：781444988";
                        
            //实例化视口
            _view = new View3D();
            addChild(_view);
            _view.x = stage.stageWidth / 2 - 150;
            _view.y = stage.stageHeight / 2 - 150;
            //设置抗锯齿参数
            _view.antiAlias = 6;
            _view.width = 300;
            _view.height = 300;
            _camera = _view.camera;
            _hovController = new HoverController(_camera, null, 180, 0, 1200,-90,90);
            _hovController.yFactor = 1;
            
            Parsers.enableAllBundled();
            
            _loader3D = new Loader3D();
            _loader3D.addEventListener(AssetEvent.ASSET_COMPLETE, onAssetComplete);
            _loader3D.addEventListener(LoaderEvent.RESOURCE_COMPLETE, loadComplete);
            _loader3D.loadData(new _dModel());
            //_view.scene.addChild(_loader3D);
            
            _hovController.lookAtObject = _loader3D;
            //_view.camera.lookAt(_loader3D.position);
            //_view.camera.z = -1500;
            
            stage.addEventListener(MouseEvent.MOUSE_DOWN, downHandler);
            stage.addEventListener(MouseEvent.MOUSE_UP, upHandler);
            this.addEventListener(Event.ENTER_FRAME, onRender);
        }
        
        private function upHandler(e:MouseEvent):void 
        {
            _move = false;  
            stage.removeEventListener(Event.MOUSE_LEAVE, leaveHandler);  
        }
        
        private function downHandler(e:MouseEvent):void 
        {
            _move = true;
            _lastTiltAngle = _hovController.tiltAngle; //记录camera的X轴旋转角度  
            _lastPanAngle = _hovController.panAngle; //记录camera的Y轴旋转角度  
            _lastMouseX = stage.mouseX;  
            _lastMouseY = stage.mouseY;   
            //添加鼠标离开stage区域的事件  
            stage.addEventListener(Event.MOUSE_LEAVE, leaveHandler); 

        }
        
        private function leaveHandler(e:Event):void 
        {
            _move = false;  
            stage.removeEventListener(Event.MOUSE_LEAVE, leaveHandler);  
        }
        
        private function loadComplete(e:LoaderEvent):void 
        {
            trace("load complete", _meshArray.length);
            //_view.scene.addChild(_loader3D);
            /*(_meshArray[15] as Mesh).material = new ColorMaterial(0xFF0000);
            (_meshArray[15] as Mesh).addEventListener(MouseEvent3D.CLICK, meshClick);
            (_meshArray[16] as Mesh).material = new ColorMaterial(0x00FF00);
            (_meshArray[16] as Mesh).addEventListener(MouseEvent3D.CLICK, meshClick);*/
        }
        
        private function meshClick(e:MouseEvent3D):void 
        {
            trace(e.target.name);
            _infoText.text = "选择的对象是："+e.target.name+"\nQQ：781444988";
        }
        
        
        private function onAssetComplete(e:AssetEvent):void 
        {
            if (e.asset.assetType == AssetType.MESH) {
                var mesh:Mesh = e.asset as Mesh;
                mesh.mouseEnabled = true;
                mesh.material = new ColorMaterial(0xFFFFFF * Math.random());
                mesh.name = String(_index);
                mesh.addEventListener(MouseEvent3D.CLICK, meshClick);
                _index++;
                _view.scene.addChild(mesh);
                _meshArray.push(mesh);
            }
        }
        
        private function onRender(e:Event):void 
        {
            if (_move) {
                _hovController.tiltAngle = _lastTiltAngle + 0.3 * (stage.mouseY - _lastMouseY);  
                _hovController.panAngle = _lastPanAngle + 0.3 * (stage.mouseX - _lastMouseX);  

            }
                        
            _view.camera.lookAt(_loader3D.position);
            _view.render();
        }
        
    }

}

本例中的AWD模型下载：https://files.cnblogs.com/njflash/myqiu.rar