BitmapDataのscroll()を使ってみた

by gaziya 22 Nov 2011

Embed

/**
 * Copyright gaziya ( http://wonderfl.net/user/gaziya )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/yFag
 */

package {
    import flash.geom.Matrix;
    import flash.geom.ColorTransform;
    import flash.events.Event;
    import flash.display.Bitmap;
    import flash.display.BitmapData;
    import flash.display.Shape;
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            graphics.beginFill(0xffcc00)                
            graphics.drawRect(0,0,stage.stageWidth,stage.stageHeight)
            var bitmapData:BitmapData = new BitmapData(stage.stageWidth,stage.stageHeight,true,0x0)
            addChild(new Bitmap(bitmapData))
            var shape:Shape = new Shape
            shape.graphics.beginFill(0xff0000)
            shape.graphics.drawCircle(0,0,10)
            var theta:Number = 0         
            addEventListener(Event.ENTER_FRAME, function(e:Event):void {
                bitmapData.colorTransform(bitmapData.rect, new ColorTransform(1,1,1,0.99))
                var matrix:Matrix = new Matrix
                matrix.translate(stage.stageWidth*2/3,stage.stageHeight/2)
                matrix.translate(0,100*Math.sin(theta))
                bitmapData.scroll(-2,0)                
                bitmapData.draw(shape,matrix)
                theta -= 0.02*Math.PI
                theta %= 2*Math.PI
            })                    
        }
    }
}