TWaver 3D for Flex本身支持3D文字的显示，但是用户必须嵌入一套字库才可以。使用传统的方式，显示3D文字。
1 [Embed("extrusionfonts.swf", mimeType="application/octet-stream")]
2 private
var font:Class;
3 
..
4 twaver.threed.util.Util3D.checkTextFont(font);
5 var network:Network3D =
new Network3D();
6 network.applyHoverCamera(-180,10,5,300);
7 this.addElement(network);
8 var n2:Node =
new Node();
9 n2.setStyle(Style3D.THREED_SHAPE_TYPE,Consts3D.THREED_SHAPE_TYPE_TEXT);
10 n2.setStyle(Style3D.TEXT_FONT_SIZE,20);
11 n2.setStyle(Style3D.TEXT_FONT_3D,"Arial");
12 n2.setStyle(Style3D.TEXT_WIDTH,200);
13 n2.setStyle(Style3D.TEXT_CONTENT,"Hello");
14 n2.setStyle(Style3D.MAPPINGTYPE,Consts3D.MAPPINGTYPE_COLOR);
15 n2.setStyle(Style3D.MATERIAL_COLOR,0x00FF00);
16 n2.setStyle(Style3D.PROPERTY_SPACE_LOCATION,
new Vector3D(100,0,0));
17 n2.setStyle(Style3D.BOTH_SIDES_VISIBLE,
true);
18 network.elementBox.add(n2);
19 network.showAxises();
对于国内客户来说，这一点就有些痛苦了，一个中文字库的体积太大，嵌入发布程序中的话，会增大发布包的大小，及时是远程加载，也会因为其恐怖的体积，让用户的web化设计面临网络情况的挑战。当然为了用户也可以去裁剪一个字库，把自己会用到的文字收入其中，做个可控数量级的枚举，但是实时系统在运行过程中，会碰到什么样的汉字也是个未知，很难做裁剪的时候枚举尽所需要的汉字。这个问题一直苦苦萦绕在每个人的心头。
，，，，，，
，，，，，，
终于，TWaver 3D支持动态贴图了，这里的动态贴图已经不只是说可以动态切换贴图资源的来源，更重要的是可以动态切换上在内存中生成的BitmapData对象。大家都知道，Flex的BitmapData支持将其UIComponent绘制出来，这一下子为我们解决汉字显示提供了一个非常便捷的方式，那就是我们把汉字写进一个TextInput组件中去，然后再把这个组件画到一个BitmapData对象中，然后在将这个对象变成我们一个3D对象的贴图（例如一个Plane，一个Billboard，一个Cube等等）。ok，动手试验
按步就班，搭建一个3D场景，并且放入一个Plane对象。
1 <?xml version="1.0" encoding="utf-8"?>
2 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
3 xmlns:s="library://ns.adobe.com/flex/spark"
4 xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" xmlns:ns="http://www.servasoft.com/twaver/3D" creationComplete="init()">
5 <fx:Declarations>
6 <!-- Place non-visual elements (e.g., services, value objects) here -->
7 </fx:Declarations>
8 <fx:Script>
9 <![CDATA[
10 import twaver.*;
11 import twaver.threed.event.*;
12 import twaver.threed.util.*;
13 private var databox:ElementBox;
14 private var source:BitmapData;
15 private var rect:Rectangle = new Rectangle(0,0,128,128);
16 private var text:TextInput = new TextInput();
17 private var n1:Node;
18 private function init():void{
19 prepare();
20 setupNetwork();
21 fillData();
22 network.showAxises();
23 network.callLater(function():void{
24 paintTexture(n1);
25 });
26 }
27 private function fillData():void{
28 n1 = NodeUtils.buildPlane(new Vector3D(0,0,0),new Vector3D(32,0,32),new Vector3D(90,0,0),Consts3D.MAPPINGTYPE_COMMON,source,true);
29 databox.add(n1);
30 }
31 private function setupNetwork():void{
32 databox = network.elementBox;
33 network.applyHoverCamera(-180,10,5,200);
34 }
35 ]]>
36 </fx:Script>
37 <ns:Network3D id="network" width="100%" height="100%"/>
38 </s:Application>
我们会得到一个类似截图的效果，一个只有一个plane对象的3D场景：
现在就让我们用点小技巧，把自己需要的汉字画到3D场景中去吧。
我们需要针对前面的代码做点改进，引入一个TextInput组件，用来呈现汉字；然后我们需要动态地生成一个BitmapData对象，把这个汉字画到指定的图片中去，最后我们再把内存里的这个画好了汉字的图片作为贴图，贴到plane上去。
1 <?xml version="1.0" encoding="utf-8"?>
2 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
3 xmlns:s="library://ns.adobe.com/flex/spark"
4 xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" xmlns:ns="http://www.servasoft.com/twaver/3D" creationComplete="init()">
5 <fx:Declarations>
6 <!-- Place non-visual elements (e.g., services, value objects) here -->
7 </fx:Declarations>
8 <fx:Script>
9 <![CDATA[
10 import mx.controls.TextInput;
11 import twaver.*;
12 import twaver.threed.event.*;
13 import twaver.threed.util.*;
14 private var databox:ElementBox;
15 private var source:BitmapData;
16 private var rect:Rectangle = new Rectangle(0,0,128,128);
17 private var text:TextInput = new TextInput();
18 private var n1:Node;
19 private function init():void{
20 prepare();
21 setupNetwork();
22 fillData();
23 network.showAxises();
24 network.callLater(function():void{
25 paintTexture(n1);
26 });
27 }
28 private function prepare():void{
29 text.width = 150;
30 text.height = 60;
31 text.setStyle('borderStyle','none');
32 text.text = "你好";
33 text.alpha = 1;
34 this.addElement(text);
35 text.visible = false;
36 }
37 private function fillData():void{
38 n1 = NodeUtils.buildPlane(new Vector3D(0,0,0),new Vector3D(32,0,32),new Vector3D(90,0,0),Consts3D.MAPPINGTYPE_COMMON,source,true);
39 databox.add(n1);
40 }
41 private function setupNetwork():void{
42 databox = network.elementBox;
43 network.applyHoverCamera(-180,10,5,200);
44 }
45 private function setTexture(n:Element,source:BitmapData):void{
46 var type:String = n.getStyle(Style3D.THREED_SHAPE_TYPE);
47 switch(type){
48 case Consts3D.THREED_SHAPE_TYPE_BILLBOARD:
49 n.setStyle(Style3D.BILLBOARD_TEXTURE,source);
50 break;
51 case Consts3D.THREED_SHAPE_TYPE_PLANE:
52 n.setStyle(Style3D.PLANE_MATERIAL,source);
53 break;
54 default:
55 n.setStyle(Style3D.MAPPING_COMMON_PATH,source);
56 break;
57 }
58 }
59 private function paintTexture(n:Element):void{
60 source = new BitmapData(32,32,true,0x00000000);
61 text.text = n.getClient("label");
62 source.fillRect(rect,0x00000000);
63 source.draw(text);
64 setTexture(n,source);
65 }
66 ]]>
67 </fx:Script>
68 <ns:Network3D id="network" width="100%" height="100%"/>
69 </s:Application>
70
再次运行，看看是不是能够得偿所愿。
吼吼，look，出来了，汉字出来了，没有引入任何字库，汉字就能够出现在我的3D场景中了。
8过，还是有些遗憾，那就是有时候如果让这汉字的内容动态地变化的时候，可怎么办？？
......
......
有了！我动态切换不就行了！？说干就干，抓紧验证，重新打造代码，添加动态变化。
1 <?xml version="1.0" encoding="utf-8"?>
2 <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
3 xmlns:s="library://ns.adobe.com/flex/spark"
4 xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600" xmlns:ns="http://www.servasoft.com/twaver/3D" creationComplete="init()">
5 <fx:Declarations>
6 <!-- Place non-visual elements (e.g., services, value objects) here -->
7 </fx:Declarations>
8 <fx:Script>
9 <![CDATA[
10 import mx.controls.TextInput;
11 import mx.events.PropertyChangeEvent;
12 import twaver.*;
13 import twaver.threed.event.*;
14 import twaver.threed.util.*;
15 private var databox:ElementBox;
16 private var source:BitmapData;
17 private var rect:Rectangle = new Rectangle(0,0,128,128);
18 private var text:TextInput = new TextInput();
19 private var n1:Node;
20 private function init():void{
21 prepare();
22 setupNetwork();
23 fillData();
24 network.showAxises();
25 network.callLater(function():void{
26 paintTexture(n1);
27 });
28
29 var timer:Timer = new Timer(1000);
30 timer.addEventListener(TimerEvent.TIMER,function(evt:Event):void{
31 var date:Date = new Date();
32 n1.setClient("label",date.seconds);
33 });
34 timer.start();
35 }
36 private function prepare():void{
37 text.width = 150;
38 text.height = 60;
39 text.setStyle('borderStyle','none');
40 text.text = "你好";
41 text.alpha = 1;
42 this.addElement(text);
43 text.visible = false;
44 }
45 private function fillData():void{
46 n1 = NodeUtils.buildPlane(new Vector3D(0,0,0),new Vector3D(32,0,32),new Vector3D(90,0,0),Consts3D.MAPPINGTYPE_COMMON,source,true);
47 databox.add(n1);
48 }
49 private function setupNetwork():void{
50 databox = network.elementBox;
51 network.applyHoverCamera(-180,10,5,200);
52 databox.addDataPropertyChangeListener(this.onPropertyChanged);
53 }
54 private function onPropertyChanged(evt:PropertyChangeEvent):void{
55 var name:String = Util3D.getPropertyName(evt.property as String);
56 if("label"==name){
57 var element:Element = evt.source as Element;
58 paintTexture(element);
59 }
60 }
61 private function setTexture(n:Element,source:BitmapData):void{
62 var type:String = n.getStyle(Style3D.THREED_SHAPE_TYPE);
63 switch(type){
64 case Consts3D.THREED_SHAPE_TYPE_BILLBOARD:
65 n.setStyle(Style3D.BILLBOARD_TEXTURE,source);
66 break;
67 case Consts3D.THREED_SHAPE_TYPE_PLANE:
68 n.setStyle(Style3D.PLANE_MATERIAL,source);
69 break;
70 default:
71 n.setStyle(Style3D.MAPPING_COMMON_PATH,source);
72 break;
73 }
74 }
75 private function paintTexture(n:Element):void{
76 source = new BitmapData(50,32,true,0x00000000);
77 text.text = n.getClient("label");
78 source.fillRect(rect,0x00000000);
79 source.draw(text);
80 setTexture(n,source);
81 }
82 ]]>
83 </fx:Script>
84 <ns:Network3D id="network" width="100%" height="100%"/>
85 </s:Application>
run again! Please check you screen!
大家一起来看看，哪里还有可以改进的，让我们把3D应用做得更彻底一些。
这里是文章中用到的
代码（见原文最下方）。