找到右上角的旋轉文本域

Question

我使用下面的從右上角旋轉文本域，我想知道找到右上角的最佳方式。

  var txt:TextField = new TextField(); 
      txt.autoSize = TextFieldAutoSize.LEFT; 
      txt.htmlText = "Some text here>"; 


      mtx = txt.transform.matrix.clone(); 
      MatrixTransformer.rotateAroundInternalPoint(mtx, txt.width, 0, -45); 
      txt.transform.matrix = mtx; 

編輯：

我只是寫了這個測試在閃IDE下面的代碼（OMG這傷害......），顯然沒有在庫調用Arial字體嵌入字體。我無法將圓圈正確地放置在文本框的右上角。

import flash.text.TextField; 
import flash.text.TextFieldAutoSize; 
import flash.geom.Matrix; 
import flash.display.Shape; 
import fl.motion.MatrixTransformer; 
import flash.geom.Point; 
import flash.text.TextFormat; 
import flash.text.Font; 

Font.registerFont(Arial); 

var angle:Number = -45 

var txt:TextField = new TextField(); 
txt.autoSize = TextFieldAutoSize.LEFT; 
txt.embedFonts = true; 
txt.defaultTextFormat = new TextFormat("Arial", 20, 0x0000ff); 
txt.text = "Here is some text"; 
txt.border = true; 
txt.x = 100; 
txt.y = 100; 
addChild(txt); 

var circle:Shape = new Shape(); 
circle.graphics.beginFill(0x00ff00); 
circle.graphics.drawCircle(-5, -5, 10); 
circle.graphics.endFill(); 
addChild(circle); 

var mtx:Matrix = txt.transform.matrix.clone(); 
MatrixTransformer.rotateAroundInternalPoint(mtx, txt.width, 0, angle); 
txt.transform.matrix = mtx; 

// The top right after being turned -45° 
var localPoint:Point = new Point(txt.width, txt.height); 
var globalPosition:Point = txt.localToGlobal(localPoint); 

circle.x = globalPosition.x; 
circle.y = globalPosition.y; 

Answer 1

如果你的意思是把它前右上方：

// The field's original top right corner: 
var localPoint:Point = new Point(txt.width, 0); 
var globalPosition:Point = txt.localToGlobal(localPoint); 

如果你的意思是，在已經變成了場：

// The top right after being turned -45° 
var localPoint:Point = new Point(txt.width, txt.height); 
var globalPosition:Point = txt.localToGlobal(localPoint); 

編輯：

好，看到你的測試後，我嘗試了一堆東西，我想我發現了一些可以工作的東西：

var angle:Number = -45 
var txt:TextField = new TextField(); 
txt.autoSize = TextFieldAutoSize.LEFT; 
txt.defaultTextFormat = new TextFormat("Arial", 20, 0x0000ff); 
txt.text = "Here is some text"; 
txt.border = true; 
txt.x = 100; 
txt.y = 250; 
stage.addChild(txt); 

var local3d:Vector3D = new Vector3D(txt.width, txt.height); 

var circle:Shape = new Shape(); 
circle.graphics.beginFill(0x00ff00); 
circle.graphics.drawCircle(-5, -5, 10); 
circle.graphics.endFill(); 
stage.addChild(circle); 

var mtx:Matrix = txt.transform.matrix.clone(); 
mtx.rotate(-45/180 * Math.PI); 
txt.transform.matrix = mtx; 

var globalPosition:Point = txt.local3DToGlobal(local3d); 

circle.x = globalPosition.x; 
circle.y = globalPosition.y; 

如果我運行這個，我得到一個TextField，轉動-45度，綠色的球粘在什麼東西的右下角。我不知道你的MatrixTransformer類，但它應該能夠處理任何矩陣。

嘗試並複製&粘貼此代碼並將其弄亂，直到獲得您想要的結果。