forked from: Water Pool
// forked from Wanson's Water Pool
// write as3 code here..
package {
import flash.display.*;
import flash.events.Event;
import flash.net.*;
import flash.geom.*;
import flash.filters.*;
[SWF(width="300", height="300", backgroundColor="0x000000", frameRate="60")]
public class Program extends Sprite {
private var demo:Demo;
private var _screen:Sprite;
private var _load:Loader;
private var _filter:DisplacementMapFilter;
private var _mtx:Matrix;
public function Program() {
_load = new Loader();
_load.load( new URLRequest("http://img.f.hatena.ne.jp/images/fotolife/t/twitter/20081206/20081206164646.jpg") );
_load.contentLoaderInfo.addEventListener( Event.COMPLETE, loadComplete );
this.addChild( _load );
_screen = new Sprite();
this.addChild( _screen );
addEventListener(Event.ENTER_FRAME, onEnterFrame);
demo = new Demo(_screen);
_screen.blendMode = "overlay";
_filter = new DisplacementMapFilter( null, new Point(0,0), 1, 1, 50, 50 )
_mtx = new Matrix();
_mtx.scale( 3, 3 );
}
public function onEnterFrame(ev:Event):void {
demo.frame();
this.attach();
}
public function loadComplete(e:Event):void {
}
public function attach():void {
var bmp:BitmapData = new BitmapData(300,300);
bmp.draw( demo.bmpdata, _mtx );
_filter.mapBitmap = bmp;
_load.filters = [ _filter ];
}
}
}
import flash.display.*;
import flash.events.MouseEvent;
class Demo {
public var bmpdata:BitmapData;
private var field1:Array = [];
private var field2:Array = [];
private const SIZEX:int = 100;
private const SIZEY:int = 100;
private const FSIZEX:int = SIZEX + 2;
private const FSIZEY:int = SIZEY + 2;
private const SCALE:int = 3;
private var ox:int;
private var oy:int;
private const c1:Number = 0.5;
private const c2:Number = 0.005;
private const cc:Number = 1 / (1 + c2);
private var filters:Array;
public function Demo(screen:Sprite) {
screen.stage.addEventListener(MouseEvent.MOUSE_MOVE, onMouseMove);
bmpdata = new BitmapData(SIZEX, SIZEY);
var mapimg:Bitmap = new Bitmap(bmpdata);
mapimg.scaleX = mapimg.scaleY = SCALE;
screen.addChild(mapimg);
var i:uint;
var j:uint;
for (i = 0; i < FSIZEY; ++i) {
field1.push([]);
field2.push([]);
for (j = 0; j < FSIZEX; ++j)
field1[i][j] = 0.0;
}
// initialize
for (i = 0; i < FSIZEX; i++)
field1[0][i] = field1[FSIZEY - 1][i] =
field2[0][i] = field2[FSIZEY - 1][i] = 0.0;
for (i = 0; i < FSIZEY; i++)
field1[i][0] = field1[i][FSIZEX - 1] =
field2[i][0] = field2[i][FSIZEX - 1] = 0.0;
for (i = 1; i < FSIZEY - 1; ++i)
for (j = 1; j < FSIZEX - 1; ++j)
field2[i][j] = field1[i][j]
+ 0.25 * (field1[i+1][j] + field1[i-1][j]
+ field1[i][j+1] + field1[i][j-1] - 4 * field1[i][j]);
put(50, 50, 300);
}
private function onMouseMove(ev:MouseEvent):void {
put((ev.localX + 1) / SCALE, (ev.localY + 1) / SCALE, 15);
}
private function put(px:Number, py:Number, pow:Number):void {
const r:uint = 10;
const bx:int = (px - r < 1) ? 1 : px - r;
const ex:int = (px + r > FSIZEX - 1) ? FSIZEX - 1 : px + r;
const by:int = (py - r < 1) ? 1 : py - r;
const ey:int = (py + r > FSIZEY - 1) ? FSIZEY - 1 : py + r;
for (var y:uint = by; y < ey; ++y) {
for (var x:uint = bx; x < ex; ++x) {
const d:Number = Math.sqrt((px - x) * (px - x) + (py - y) * (py - y));
if (d < r) {
var p:Number = pow * Math.cos(Math.PI / 2 * d / r);
field1[y][x] += p;
field2[y][x] += p;
}
}
}
}
public function frame():void {
// draw
var r:uint, g:uint, b:uint, c:uint;
var x:uint, y:uint;
var line_c:Array, line_p:Array, line_n:Array;
bmpdata.lock();
for (y = 1; y < SIZEY + 1; ++y) {
line_c = field2[y];
for (x = 1; x < SIZEX + 1; ++x) {
c = Math.abs(line_c[x]);
r = c + 140;
g = c + 160;
b = c + 220;
if (r > 255) r = 255;
if (g > 255) g = 255;
if (b > 255) b = 255;
bmpdata.setPixel(x - 1, y - 1, (r << 16) + (g << 8) + b);
}
}
bmpdata.unlock();
// step
for (y = 1; y < FSIZEY - 1; ++y) {
line_p = field2[y - 1];
line_c = field2[y];
line_n = field2[y + 1];
for (x = 1; x < FSIZEX - 1; ++x) {
field1[y][x] = (line_c[x] * (2 - 4 * c1)
- field1[y][x] * (1 - c2)
+ c1 * (line_n[x] + line_p[x]
+ line_c[x + 1] + line_c[x - 1])) * cc;
}
}
// next
const tmp:Array = field1;
field1 = field2;
field2 = tmp;
}
}