User Guide

778 ActionScript classes

The rotate() method alters the a and d properties of the Matrix object. In matrix notation

this is shown as follows:

Availability: ActionScript 1.0; Flash Player 8

Parameters

angle:Number - The rotation angle in radians.

Example

The following example shows how the

rotate() method rotates rectangleMc 30° clockwise.

Applying

myMatrix to rectangleMc resets its _x value, leaving you to reset it to 100

manually.

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 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); // 0

rectangleMc._x = 100;

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);