AS30 3D旋转木马效果实例

1、AS3.0 3D旋转木马效果实例在这个 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：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下载 (22.67 KB)2010-3-17 08:203、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下载 (15.34 KB)2010-3-17 08:204、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下载 (7.57 K

2、B)2010-3-17 08:205、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下载 (44.37 KB)2010-3-17 08:207、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下载 (23.04 KB)2010-3-17 08:209、选中第1帧，打开动作面板输入代码： 1. /The total number of menu items2. const NUMBER_OF_ITEMS:uint = 20

3、;3.4. /This array will contain all the menu items5. var menuItems:Array = new Array();6.7. /Set the focal length8. var focalLength:Number = 350;9.10. /Set the vanishing point11. var vanishingPointX:Number = stage.stageWidth / 2;12. var vanishingPointY:Number = stage.stageHeight / 2;13.14. /We calcul

4、ate the angleSpeed in the ENTER_FRAME listener15. var angleSpeed:Number = 0;16.17. /Radius of the circle18. var radius:Number = 128;19.20. /Calculate the angle difference between the menu items (in radians)21. var angleDifference:Number = Math.PI * (360 / NUMBER_OF_ITEMS) / 180;22.23. /This loop cre

5、ates and positions the carousel items24. for (var i:uint = 0; i the smaller the scale ratio)41. var scaleRatio = focalLength/(focalLength + menuItem.zpos3D);42.43. /Scale the menu item according to the scale ratio44. menuItem.scaleX = menuItem.scaleY = scaleRatio;45.46. /Position the menu item to th

6、e stage (from 3D to 2D coordinates)47. menuItem.x = vanishingPointX + menuItem.xpos3D * scaleRatio;48. menuItem.y = vanishingPointY + menuItem.ypos3D * scaleRatio;49.50. /Assign an initial alpha51. menuItem.alpha = 0.3;52.53. /Add a text to the menu item54. menuItem.menuItemText.text = Menu item + i

7、;55.56. /We dont want the text field to catch mouse events57. menuItem.mouseChildren = false;58.59. /Assign MOUSE_OVER, MOUSE_OUT and CLICK listeners for the menu item60. menuItem.addEventListener(MouseEvent.MOUSE_OVER, mouseOverItem);61. menuItem.addEventListener(MouseEvent.MOUSE_OUT, mouseOutItem)

8、;62. menuItem.addEventListener(MouseEvent.CLICK, itemClicked);63.64. /Add the menu item to the menu items array65. menuItems.push(menuItem);66.67. /Add the menu item to the stage68. addChild(menuItem);69. 70.71. /Add an ENTER_FRAME listener for the animation72. addEventListener(Event.ENTER_FRAME, mo

9、veCarousel);73.74. /This function is called in each frame75. function moveCarousel(e:Event):void 76.77. /Calculate the angle speed according to mouseY position78. angleSpeed = (mouseY - stage.stageHeight / 2) * 0.0002;79.80. /Loop through the menu items81. for (var i:uint = 0; i NUMBER_OF_ITEMS; i+)

10、 82.83. /Store the menu item to a local variable84. var menuItem:MenuItem = (MenuItem)(menuItemsi);85.86. /Update the current angle of the item87. menuItem.currentAngle += angleSpeed;88.89. /Calculate a scale ratio90. var scaleRatio = focalLength/(focalLength + menuItem.zpos3D);91.92. /Scale the ite

11、m according to the scale ratio93. menuItem.scaleX=menuItem.scaleY=scaleRatio;94.95. /Set new 3D coordinates96. menuItem.xpos3D=- radius*Math.cos(menuItem.currentAngle)*0.5;97. menuItem.ypos3D=radius*Math.sin(menuItem.currentAngle);98. menuItem.zpos3D=radius*Math.cos(menuItem.currentAngle);99.100. /U

12、pdate the items coordinates.101. menuItem.x=vanishingPointX+menuItem.xpos3D*scaleRatio;102. menuItem.y=vanishingPointY+menuItem.ypos3D*scaleRatio;103. 104.105. /Call the function that sorts the items so they overlap each other correctly106. sortZ();107. 108.109. /This function sorts the items so the

13、y overlap each other correctly110. function sortZ():void 111.112. /Sort the array so that the item which has the highest 113. /z position (= furthest away) is first in the array114. menuItems.sortOn(zpos3D, Array.NUMERIC | Array.DESCENDING);115.116. /Set new child indexes for the images117. for (var

14、 i:uint = 0; i NUMBER_OF_ITEMS; i+) 118. setChildIndex(menuItemsi, i);119. 120. 121.122. /This function is called when a mouse is over an item123. function mouseOverItem(e:Event):void 124.125. /Change the alpha to 1126. e.target.alpha=1;127. 128.129. /This function is called when a mouse is out of an item130. function mouseOutItem(e:Event):void 131.132. /