Flash AS绘制旋转的3D效果菜单动画

时间:2015-2-11 14:16:28   作者:   来源:   阅读:80   评论:0
内容摘要:在这个3D旋转菜单教程中,将学习如何用AS3代码创建一个垂直的3D立体菜单效果,木马将会根据鼠标决定旋转速度。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 &tim...
在这个3D旋转菜单教程中,将学习如何用AS3代码创建一个垂直的3D立体菜单效果,木马将会根据鼠标决定旋转速度。

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:

Flash AS绘制旋转的3D效果菜单动画,PS教程,思缘教程网

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:

Flash AS绘制旋转的3D效果菜单动画,PS教程,思缘教程网

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

Flash AS绘制旋转的3D效果菜单动画,PS教程,思缘教程网

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:

Flash AS绘制旋转的3D效果菜单动画,PS教程,思缘教程网

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:

Flash AS绘制旋转的3D效果菜单动画,PS教程,思缘教程网

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


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