The randomSeed parameter is responsible for the randomness of the noise : BitmapData « Graphics « Flash / Flex / ActionScript






  1. Flash / Flex / ActionScript
  2. Graphics
  3. BitmapData

The randomSeed parameter is responsible for the randomness of the noise

 

package {

    import flash.display.BitmapData;
    import flash.display.Bitmap;
    import flash.display.Sprite;
    import flash.utils.Timer;
    import flash.events.TimerEvent;

    public class Main extends Sprite {

        private var _bitmapData:BitmapData = new BitmapData(400, 400);

        public function Main () {
            var bitmap:Bitmap = new Bitmap(_bitmapData);
            addChild(bitmap);

            var timer:Timer = new Timer(50);
            timer.addEventListener(TimerEvent.TIMER, timerHandler);
            timer.start();

        }

        private function timerHandler(event:TimerEvent):void {
            _bitmapData.perlinNoise(100, 100, 1, Math.random() * 1000, false, false);
        }
    }
}








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5.Create animation by setting the bitmap pixel
6.Dissolve
7.File BitmapData with Rectangle
8.Get pixel data from BitmapData
9.The alpha value of pixels can be set in transparent bitmaps only (i.e., bitmaps created with the value true passed to the transparent parameter of the BitmapData constructor)
10.getPixel32() Versus getPixel( )
11.Retrieve a pixel with Alpha set to 255, from a transparent image
12.Retrieving the Color of a Region of Pixels
13.Modifying a BitmapData
14.Assign a pixel value using a number that specifies an Alpha channel of CC
15.Using BitmapData.lock( ) to improve performance
16.Assigning the Color of a Region of Pixels
17.How draw( ) handles Alpha channel values
18.Applying Color Transformations
19.Detecting Areas by Color
20.Adding Noise
21.Adding Perlin Noise
22.Updates the octaves parameter
23.The following code makes a BitmapData object with Perlin noise, and then uses that object as a bitmap fill. Because the stitch parameter is false, the edges are visible as it tiles.
24.PerlinNoise animation