MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH

To Next Page

To Previous Page

474 Animation, Filters, and Drawings

Adding color and brightness effects with code

In addition to using ActionScript to set and animate alpha fades (see “Fading objects with

code” on page 472), you can animate various color and brightness effects by using code

instead of using the Filters panel in the Property inspector.

The following procedure loads a JPEG image and applies a color transform filter, which

modifies the red and green channels as the mouse pointer moves along the x-axis and y-axis.

To change an object’s color channels by using ActionScript:

1. Create a new Flash document called colorTrans.fla.

2. Select Frame 1 of the Timeline, and add the following code to the Actions panel:

import flash.geom.Transform;

import flash.geom.ColorTransform;

var imageClip:MovieClip = this.createEmptyMovieClip("imageClip", 1);

var clipLoader:MovieClipLoader = new MovieClipLoader();

clipLoader.loadClip("http://www.helpexamples.com/flash/images/

image1.jpg", imageClip);

var mouseListener:Object = new Object();

mouseListener.onMouseMove = function():Void {

var transformer:Transform = new Transform(imageClip);

var colorTransformer:ColorTransform = transformer.colorTransform;

colorTransformer.redMultiplier = (_xmouse / Stage.width) * 1;

colorTransformer.greenMultiplier = (_ymouse / Stage.height) * 1;

transformer.colorTransform = colorTransformer;

}

Mouse.addListener(mouseListener);

Select Control > Test Movie to test the document, and then move the mouse pointer

around the Stage.

The image file that loads transforms colors as you move the mouse.

You can also use the ColorMatrixFilter class to convert a color image to a black and white

image, as the following procedure shows.

MACROMEDIA FLASH 8-LEARNING ACTIONSCRIPT 2.0 IN FLASH - Page 474