WebCamera与MetaBall构造的水
本示例演示了在WebCamera视频表面浮现一层水的效果，水的游动与融合使用Metaball方式构建源代码：WebCamera_Drip
[code lang="as3"]
package{
import com.quasimondo.bitmapdata.CameraBitmap;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.BitmapDataChannel;
import flash.display.Sprite;
import flash.events.Event;
import flash.filters.BevelFilter;
import flash.filters.BlurFilter;
import flash.filters.DisplacementMapFilter;
import flash.filters.DisplacementMapFilterMode;
import flash.filters.DropShadowFilter;
import flash.geom.Point;
import flash.geom.Rectangle;
[SWF(width="400",height="300",frameRate="31",backgroundColor="0xffffff")]
public class WebCamera_Drip extends Sprite{
private var w:Number = 400;
private var h:Number = 300;
private var pt:Point = new Point(0,0);
private var rect:Rectangle = new Rectangle(0,0,w,h);
private var camera:CameraBitmap;
private var bmp:Bitmap;
private var bmpd:BitmapData = new BitmapData(w,h,true,0xFFFFFF);
private var perlinMap:BitmapData = new BitmapData(w,h);
private var blobMap:BitmapData = new BitmapData(w,h);
private var darken:DropShadowFilter;
private var lighten:DropShadowFilter;
private var dmf:DisplacementMapFilter;
private var blur:BlurFilter;
private var bevel:BevelFilter;
private var shifts:Array = [new Point(1,1),new Point(3,3)];
public function WebCamera_Drip(){
camera = new CameraBitmap(w,h,25,true);
addChild(new Bitmap(camera.bitmapData));
bevel = new BevelFilter();
bevel.blurX = 20;
bevel.blurY = 20;
bevel.distance = 10;
bevel.highlightColor = 0xFFFFFF;
bevel.shadowColor = 0xFFFFFF;
bevel.shadowAlpha = 0.35;
blur = new BlurFilter(2,2,2);
lighten = new DropShadowFilter(4,250,0xFFFFFF,0.95,4,4,1,1,false,false,false);
darken = new DropShadowFilter(4,25,0x000000,0.25,4,4,1,1,false,false,false);
bmp = new Bitmap(bmpd);
bmp.filters = [blur,bevel,lighten,darken];
dmf = new DisplacementMapFilter(perlinMap,pt,1,2,40,40,DisplacementMapFilterMode.CLAMP,0);
addChild(bmp);
addEventListener(Event.ENTER_FRAME,onEnterframe);
}
private function onEnterframe(e:Event):void{
shifts[0].y = shifts[0].y - 1;
shifts[1].y = shifts[1].y - 2;
bmpd.lock();
// 使用PerlinNoise生成噪波
perlinMap.perlinNoise(105,105,2,0,false,true,7,true,shifts);
// 将噪波中大于140/255*0xFFFFFF的颜色调成0xFFFF8000（品色）
blobMap.fillRect(rect,0x000000);
blobMap.threshold(perlinMap,rect,pt,">",140/255*0xFFFFFF,0xFFFF8000,0xFFFFFF,false);
// 复制原始的bmp和camera的内容
bmpd.draw(bmp);
bmpd.copyPixels(camera.bitmapData,bmpd.rect,pt);
bmpd.applyFilter(bmpd,bmpd.rect,pt,dmf);
bmpd.applyFilter(bmpd,bmpd.rect,pt,blur);
// 使用blobMap的Alpha通道替换bmpd中的alpha通道
bmpd.copyChannel(blobMap,blobMap.rect,pt,BitmapDataChannel.ALPHA,BitmapDataChannel.ALPHA);
}
}
}
[/code]
<img src="http://www.everyinch.net/wp-content/uploads/2011/10/WebCamera_Drip.jpg" alt="" title="WebCamera_Drip" width="397" height="299" class="aligncenter size-full wp-image-590" />