public class TextBlock_lineRotationExample extends Sprite {
public function TextBlock_lineRotationExample():void {
var s:String = “一向批判電影不會「口下留情」的大陸媒體,竟在李安導演《少年PI的奇幻漂流》內地上映後,於中國最大入口網站搜狐,罕見大讚道:『影片美輪美奐的視覺奇觀,身臨其境的3D效果。』”;
var fontDescription:FontDescription = new FontDescription(“MS Mincho”);
var format:ElementFormat = new ElementFormat();
format.fontSize = 15;
format.fontDescription = fontDescription;
var textElement:TextElement = new TextElement(s, format);
var textBlock:TextBlock = new TextBlock();
textBlock.content = textElement;
textBlock.lineRotation = TextRotation.ROTATE_90;
var linePosition:Number = this.stage.stageWidth – 120;
var previousLine:TextLine = null;
public final class ArrangeTool
{
private static var instance:ArrangeTool;
public static function getInstance():ArrangeTool{
if (instance == null){
instance = new ArrangeTool();
}
return instance;
}
/**
* 將物件排成弧型
*/
public function drawArc(startX:int,endX:int,Y:int,radius:int,items:Array):void{
//先算出圓心座標
var center:Point = new Point((startX+endX)/2,Y+Math.sqrt(radius*radius-Math.pow(startX-endX,2)/4));
//將該區域的圓切成相同大小等份,先算整個弧線的角度,以角度切
var totalAngel:int = Math.asin((endX – center.x)/radius)*360/Math.PI;
var onePiece:int = totalAngel/(items.length-1);
//要取出該弧形的點的座標及角度
var angle:int;
for(var i:int=0;i< span="">
angle = 90-(totalAngel/2)+onePiece*i;
var tmp:Point = getPoint(radius,angle);
items[i].x = center.x-tmp.x-(items[i].width/2);
items[i].y = center.y-tmp.y-(items[i].height/2);
//以程式改變註冊點
var A:Point=items[i].localToGlobal(new Point(items[i].width/2,items[i].height/2));
items[i].rotation = (angle-90);
var B:Point=items[i].localToGlobal(new Point(items[i].width/2,items[i].height/2));
items[i].x-=B.x-A.x;
items[i].y-=B.y-A.y;
}
}
private function getPoint(radius:int,angel:int):Point{
var y:int = Math.sin(angel*Math.PI/180)*radius;
var x:int = Math.cos(angel*Math.PI/180)*radius;
return new Point(x,y);