package flashAs {
import flash.display.BitmapData;
import flash.geom.Matrix;
//具有圖片反轉功能的類別
public class ImageRotation extends Sprite{
private var matrix:Matrix;
private var sourceBD:BitmapData;
//建構子, 設定圖片來源和座標
public function ImageRotation (BD:BitmapData, X:int, Y:int){
sourceBD= BD;
this.x = X; this.y = Y;
//--設定變型矩陣的物件
matrix = new Matrix();
matrix.a=-1;
matrix.b = Math.sin( (180/180) * Math.PI);
matrix.tx= sourceBD.width;
this. goRecovery();
}
//進行水平反轉
public function goRotation (){
this.graphics.clear();
this.graphics.beginBitmapFill(sourceBD, matrix, false);
this.graphics.drawRect(0, 0, sourceBD.width, sourceBD.height);
this.graphics.endFill();
}
//恢復原始圖片
public function goRecovery(){
this.graphics.clear();
this.graphics.beginBitmapFill(sourceBD);
this.graphics.drawRect(0, 0, sourceBD.width, sourceBD.height);
}
}
}
