Flash AS绘制旋转的3D效果菜单动画

演示：

[swf]http://www.missyuan.net/uploads/media/091014/1-1004291H324.swf[/swf]

1、新建Flash文件,设置宽、高属性为 550 × 400 。

2、用圆角矩形工具，画一个 158 × 35的长方形。笔触为8白色，填充色#0 F7E 88。图1：

3、将长方形转换成名为 " Menu Item " 的影片剪辑。设定注册点为中心。图2：

4、双击舞台上的影片剪辑，进入编辑状态。创建动态文本，在它里面输入需要的本文。图3

5、在属性面板中输入实例名字 " menuItemText" 。

6、按下字符嵌入按钮，插入下列字型。图4：

7、切换回主场景1，删除舞台上的影片剪辑，实例将由代码生成。

8、打开库元件面板，右键单击影片剪辑，(CS3选链接、CS4选属性)给元件添加一个绑定类。类名 " MenuItem" 。图5：

9、选中第1帧，打开动作面板输入代码：

//The total number of menu items const NUMBER_OF_ITEMS:uint = 20; //This array will contain all the menu items var menuItems:Array = new Array(); //Set the focal length var focalLength:Number = 350; //Set the vanishing point var vanishingPointX:Number = stage.stageWidth / 2; var vanishingPointY:Number = stage.stageHeight / 2; //We calculate the angleSpeed in the ENTER_FRAME listener var angleSpeed:Number = 0; //Radius of the circle var radius:Number = 128; //Calculate the angle difference between the menu items (in radians) var angleDifference:Number = Math.PI * (360 / NUMBER_OF_ITEMS) / 180; //This loop creates and positions the carousel items for (var i:uint = 0; i < NUMBER_OF_ITEMS; i++) { //Create a new menu item var menuItem:MenuItem = new MenuItem(); //Calculate the starting angle for the menu item var startingAngle:Number = angleDifference * i; //Set a "currentAngle" attribute for the menu item menuItem.currentAngle = startingAngle; //Position the menu item menuItem.xpos3D =  -  radius * Math.cos(menuItem.currentAngle) * 0.5; menuItem.ypos3D = radius * Math.sin(startingAngle); menuItem.zpos3D = radius * Math.cos(startingAngle); //Calculate the scale ratio for the menu item (the further the item -> the smaller the scale ratio) var scaleRatio = focalLength/(focalLength + menuItem.zpos3D); //Scale the menu item according to the scale ratio menuItem.scaleX = menuItem.scaleY = scaleRatio; //Position the menu item to the stage (from 3D to 2D coordinates) menuItem.x = vanishingPointX + menuItem.xpos3D * scaleRatio; menuItem.y = vanishingPointY + menuItem.ypos3D * scaleRatio; //Assign an initial alpha menuItem.alpha = 0.3; //Add a text to the menu item menuItem.menuItemText.text = "Menu item " + i; //We don’t want the text field to catch mouse events menuItem.mouseChildren = false; //Assign MOUSE_OVER, MOUSE_OUT and CLICK listeners for the menu item menuItem.addEventListener(MouseEvent.MOUSE_OVER, mouseOverItem); menuItem.addEventListener(MouseEvent.MOUSE_OUT, mouseOutItem); menuItem.addEventListener(MouseEvent.CLICK, itemClicked); //Add the menu item to the menu items array menuItems.push(menuItem); //Add the menu item to the stage addChild(menuItem); } //Add an ENTER_FRAME listener for the animation addEventListener(Event.ENTER_FRAME, moveCarousel); //This function is called in each frame function moveCarousel(e:Event):void { //Calculate the angle speed according to mouseY position angleSpeed = (mouseY - stage.stageHeight / 2) * 0.0002; //Loop through the menu items for (var i:uint = 0; i < NUMBER_OF_ITEMS; i++) { //Store the menu item to a local variable var menuItem:MenuItem = (MenuItem)(menuItems[i]); //Update the current angle of the item menuItem.currentAngle += angleSpeed; //Calculate a scale ratio var scaleRatio = focalLength/(focalLength + menuItem.zpos3D); //Scale the item according to the scale ratio menuItem.scaleX=menuItem.scaleY=scaleRatio; //Set new 3D coordinates menuItem.xpos3D=- radius*Math.cos(menuItem.currentAngle)*0.5; menuItem.ypos3D=radius*Math.sin(menuItem.currentAngle); menuItem.zpos3D=radius*Math.cos(menuItem.currentAngle); //Update the item’s coordinates. menuItem.x=vanishingPointX+menuItem.xpos3D*scaleRatio; menuItem.y=vanishingPointY+menuItem.ypos3D*scaleRatio; } //Call the function that sorts the items so they overlap each other correctly sortZ(); } //This function sorts the items so they overlap each other correctly function sortZ():void { //Sort the array so that the item which has the highest //z position (= furthest away) is first in the array menuItems.sortOn("zpos3D", Array.NUMERIC | Array.DESCENDING); //Set new child indexes for the images for (var i:uint = 0; i < NUMBER_OF_ITEMS; i++) { setChildIndex(menuItems[i], i); } } //This function is called when a mouse is over an item function mouseOverItem(e:Event):void { //Change the alpha to 1 e.target.alpha=1; } //This function is called when a mouse is out of an item function mouseOutItem(e:Event):void { //Change the alpha to 1 e.target.alpha=0.3; } //This function is called when an item is clicked function itemClicked(e:Event):void { trace("Item clicked! Add your own logic here."); }

 

10、完成，测试你的影片。

源文件请到论坛：http://www.missyuan.com/viewthread.php?tid=454675