ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Working with geometry
Class Methods or properties Description
BitmapData applyFilter()
copyChannel()
merge()
paletteMap()
pixelDissolve()
threshold()
Matrix deltaTransformPoint()
transformPoint()
Rectangle bottomRight
size
topLeft
Using Rectangle objects
Flash Player 9 and later, Adobe AIR 1.0 and later
A Rectangle object defines a rectangular area. A Rectangle object has a position, defined by the x and y coordinates of
its upper-left corner, a width property, and a height property. You can define these properties for a new Rectangle
object by calling the Rectangle() constructor function, as follows:
import flash.geom.Rectangle;
var rx:Number = 0;
var ry:Number = 0;
var rwidth:Number = 100;
var rheight:Number = 50;
var rect1:Rectangle = new Rectangle(rx, ry, rwidth, rheight);
Resizing and repositioning Rectangle objects
Flash Player 9 and later, Adobe AIR 1.0 and later
There are a number of ways to resize and reposition Rectangle objects.
You can directly reposition the Rectangle object by changing its x and y properties. This change has no effect on the
width or height of the Rectangle object.
import flash.geom.Rectangle;
var x1:Number = 0;
var y1:Number = 0;
var width1:Number = 100;
var height1:Number = 50;
var rect1:Rectangle = new Rectangle(x1, y1, width1, height1);
trace(rect1) // (x=0, y=0, w=100, h=50)
rect1.x = 20;
rect1.y = 30;
trace(rect1); // (x=20, y=30, w=100, h=50)
Last updated 6/6/2012
Used to define the positions of rectangles that
define the operations.
Used to define points for which you want to
apply a transformation.
Used to define these properties.
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