User Guide

Matrix (flash.geom.Matrix) 779
mc.lineTo(width, height);
mc.lineTo(width, 0);
mc.lineTo(0, 0);
return mc;
}
The previous example uses the _x property of the MovieClip object to position
rectangleMc. Generally, when dealing with Matrix object positioning, mixing positioning
techniques is considered poor format. The previous example written in correct syntax would
concatenate a translation Matrix to
myMatrix to change the horizontal location of
rectangleMc. The following example demonstrates this.
import flash.geom.Matrix;
import flash.geom.Transform;
var myMatrix:Matrix = new Matrix();
trace(myMatrix.toString()); // (a=1, b=0, c=0, d=1, tx=0, ty=0)
var degrees:Number = 30;
var radians:Number = (degrees/180) * Math.PI;
myMatrix.rotate(radians);
trace(myMatrix.toString()); // (a=0.866025403784439, b=0.5, c=-0.5,
d=0.866025403784439, tx=0, ty=0)
var translateMatrix:Matrix = new Matrix();
translateMatrix.translate(100, 0);
myMatrix.concat(translateMatrix);
trace(myMatrix.toString()); // (a=0.866025403784439, b=0.5, c=-0.5,
d=0.866025403784439, tx=100, ty=0)
var rectangleMc:MovieClip = createRectangle(20, 80, 0xFF0000);
trace(rectangleMc._x); // 0
rectangleMc._x = 100;
trace(rectangleMc._x); // 100
var rectangleTrans:Transform = new Transform(rectangleMc);
rectangleTrans.matrix = myMatrix;
trace(rectangleMc._x); // 100
function createRectangle(width:Number, height:Number,
color:Number):MovieClip {
var depth:Number = this.getNextHighestDepth();
var mc:MovieClip = this.createEmptyMovieClip("mc_" + depth, depth);
mc.beginFill(color);
mc.lineTo(0, height);
mc.lineTo(width, height);
mc.lineTo(width, 0);
mc.lineTo(0, 0);
return mc;
}