as代码写的风轮效果package com.nkknight.chapter1{import flash.display.Bitmapimport flash.display.Bi
as代码写的风轮效果
package com.nkknight.chapter1{ import flash.display.Bitmap; import flash.display.BitmapData; import flash.display.BlendMode; import flash.display.GradientType; import flash.display.Shader; import flash.display.Shape; import flash.display.Sprite; import flash.display.StageAlign; import flash.display.StageScaleMode; import flash.events.Event; import flash.events.MouseEvent; import flash.filters.GradientBevelFilter; import flash.geom.Matrix; import flash.geom.Point; import flash.geom.Rectangle; [SWF(backgroundColor="0x000000", width="1024", height="768", frameRate="24")] public class DrawGrandientFill2 extends Sprite { private var colors:Array = [0xffffff,0x888888,0x000000]; private var alphas:Array = [1,1,1]; private var ratios:Array = [0,127,255]; private var left:Shape; private var top:Shape; private var right:Shape; private var bottom:Shape; private var sprite:Sprite; private var bitmap:BitmapData; private var oneM:Matrix; private var tM:Matrix; private var tM2:Matrix; private var itemWidth:Number = 200; private var itemHeight:Number = 50; public function DrawGrandientFill2() { super(); stage.align = StageAlign.TOP_LEFT; stage.scaleMode = StageScaleMode.NO_SCALE; init(); } private function init():void { bitmap = new BitmapData(itemWidth * 2, itemWidth * 2, false, 0x000000); oneM = new Matrix(); oneM.rotate(Math.PI / 180); tM = new Matrix(); tM.translate(itemWidth, itemWidth); tM2 = new Matrix(); tM2.translate( - itemWidth, -itemWidth); render(); sprite = new Sprite(); sprite.graphics.beginBitmapFill(bitmap, tM2, true); sprite.graphics.drawRect( - itemWidth, -itemWidth, itemWidth*2, itemWidth*2); sprite.x = 300; sprite.y = 300; addChild(sprite); this.addEventListener(Event.ENTER_FRAME, onEnter); } private function onEnter(evt:Event):void { sprite.rotation += 5; sprite.x = stage.mouseX; sprite.y = stage.mouseY; } private function render():void { drawLeft(); drawTop(); drawRight(); drawBottom(); } private function drawLeft():void { left = new Shape(); var temp:Matrix = new Matrix(); temp.createGradientBox(itemWidth, itemHeight, 0, -itemWidth, -itemHeight /2); left.graphics.beginGradientFill(GradientType.RADIAL, colors, alphas, ratios, temp, "pad", "rgb", 1); left.graphics.drawRect(-itemWidth, -itemHeight / 2, itemWidth, itemHeight); bitmap.draw(left, tM, null, BlendMode.ADD, null, false); left.graphics.endFill(); left = null; } private function drawTop():void { top = new Shape(); var temp:Matrix = new Matrix(); temp.createGradientBox(itemHeight, itemWidth, Math.PI / 2, -itemHeight / 2, -itemWidth); top.graphics.beginGradientFill(GradientType.RADIAL, colors, alphas, ratios, temp, "pad", "rgb", 1); top.graphics.drawRect( -itemHeight / 2, - itemWidth, itemHeight, itemWidth); bitmap.draw(top, tM, null, BlendMode.ADD, null, false); top.graphics.endFill(); top = null; } private function drawRight():void { right = new Shape(); var temp:Matrix = new Matrix(); temp.createGradientBox(itemWidth, itemHeight, 0, 0, - itemHeight /2); right.graphics.beginGradientFill(GradientType.RADIAL, colors, alphas, ratios, temp, "pad", "rgb", -1); right.graphics.drawRect(0, -itemHeight / 2, itemWidth, itemHeight); bitmap.draw(right, tM, null, BlendMode.ADD, null, false); right.graphics.endFill(); right = null; } private function drawBottom():void { bottom = new Shape(); var temp:Matrix = new Matrix(); temp.createGradientBox(itemHeight, itemWidth, Math.PI / 2, -itemHeight / 2, 0); bottom.graphics.beginGradientFill(GradientType.RADIAL, colors, alphas, ratios, temp, "pad", "rgb", -1); bottom.graphics.drawRect( - itemHeight / 2, 0, itemHeight,itemWidth); bitmap.draw(bottom, tM, null, BlendMode.ADD, null, false); bottom.graphics.endFill(); bottom = null; } }}?
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