DisplacementMapFilter 球
マウスドラッグで大きく
/**
* マウスドラッグで大きく
*/
package {
import com.flashdynamix.utils.SWFProfiler;
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.BitmapDataChannel;
import flash.display.Loader;
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.filters.BitmapFilter;
import flash.filters.BitmapFilterQuality;
import flash.filters.DisplacementMapFilter;
import flash.filters.DisplacementMapFilterMode;
import flash.geom.Matrix;
import flash.geom.Point;
import flash.geom.Rectangle;
import flash.net.URLRequest;
import flash.system.LoaderContext;
import flash.system.System;
[SWF(backgroundColor="0xFFFFFF", width="465", height="465", frameRate="60")]
public class Main6_5 extends Sprite {
private static const WIDTH_STAGE:uint = 465;
private static const HEIGHT_STAGE:uint = 465;
public function Main6_5() {
if (stage) init();
else addEventListener(Event.ADDED_TO_STAGE, init);
}
private var _jpeg:Bitmap;
private var _canvas:Sprite = new Sprite();
private var _nowDmfsValue:uint = 0;
private var _dmfs:Vector.<DisplacementMapFilter> = new Vector.<DisplacementMapFilter>();
private var _radiuses:Vector.<Number> = new Vector.<Number>();
private function init(e:Event = null):void {
removeEventListener(Event.ADDED_TO_STAGE, init);
stage.scaleMode = StageScaleMode.NO_SCALE;
SWFProfiler.init(this);
Wonderfl.capture_delay( 3 );
var context:LoaderContext = new LoaderContext();
context.checkPolicyFile = true;
var loader:Loader = new Loader();
loader.load(new URLRequest("http://dust.heteml.jp/wonderfl/image/beck.jpg"), context);
loader.contentLoaderInfo.addEventListener(Event.COMPLETE, function():void {
_jpeg = Bitmap(loader.content);
loader.contentLoaderInfo.removeEventListener(this, arguments.callee);
start();
});
}
private function start():void {
_canvas.addChild(_jpeg);
_canvas.x = (WIDTH_STAGE - _canvas.width) / 2;
_canvas.y = (HEIGHT_STAGE - _canvas.height) / 2;
addChild(_canvas);
var radius:Number = 50;
var dmf:DisplacementMapFilter = createDMF(radius);
_radiuses.push(radius);
_dmfs.push(dmf);
radius = 100;
dmf = createDMF(radius);
_radiuses.push(radius);
_dmfs.push(dmf);
addEventListener(Event.ENTER_FRAME, enterFrameHandler);
stage.addEventListener(MouseEvent.MOUSE_DOWN, mouseDowHander);
stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHander);
}
private function createDMF(radius:Number):DisplacementMapFilter {
var mapBitmap:BitmapData = new BitmapData(radius * 2, radius * 2, false);
var maxDistance:Number = radius / 2;//適当。適宜調整
var dmf:DisplacementMapFilter = new DisplacementMapFilter(
mapBitmap,
new Point(),
BitmapDataChannel.BLUE,//x方向の移動に使う色
BitmapDataChannel.GREEN,//y方向の移動に使う色
maxDistance,
maxDistance,
DisplacementMapFilterMode.COLOR
);
var yMax:int = radius * 2;
var xMax:int = radius * 2;
var center:Number = radius;
mapBitmap.lock();
for (var yy:int = 0; yy < yMax; ++yy) {
for (var xx:int = 0; xx < xMax; ++xx) {
var dx:Number = xx - center;
var dy:Number = yy - center;
var distance:Number = Math.sqrt(dx * dx + dy * dy);
if (distance <= radius) {
//座標変換公式
//http://kenpei-web.hp.infoseek.co.jp/math/coordinates/
//中心に近づくほど90度(Math.PI / 2)になるようにする。
var rate:Number = distance / radius;
var theta:Number = (Math.PI / 2) * rate;
var phi:Number = Math.atan2(dy, dx);
var toX:Number = (radius * Math.sin(theta) * Math.cos(phi)) + center;
var toY:Number = (radius * Math.sin(theta) * Math.sin(phi)) + center;
var colorX:Number = getColor(xx - toX, dmf.scaleX);
var colorY:Number = getColor(yy - toY, dmf.scaleY);
var color:uint = colorY << 8 | colorX;
}
else {
//何も変化しない色
color = 0x80808080;
}
mapBitmap.setPixel(xx, yy, color);
}
}
mapBitmap.unlock();
return dmf;
}
/**
* @param diff 動かしたい距離
* @param scale 取り得る値の最大値
* @return
*/
private function getColor(diff:Number, scale:Number):uint {
return Math.round((diff * 0x100) / scale) + 0x80;
}
private function enterFrameHandler(e:Event):void {
var dmf:DisplacementMapFilter = _dmfs[_nowDmfsValue];
//マウス中心に動かす
var p:Point = dmf.mapPoint;
p.x = _canvas.mouseX - _radiuses[_nowDmfsValue];
p.y = _canvas.mouseY - _radiuses[_nowDmfsValue];
dmf.mapPoint = p;
_jpeg.filters = [dmf];
}
private function mouseUpHander(e:MouseEvent):void {
_nowDmfsValue = 0;
}
private function mouseDowHander(e:MouseEvent):void {
_nowDmfsValue = 1;
}
}
}