Snowfall

package
{
  import org.flintparticles.twoD.emitters.Emitter2D;
  import org.flintparticles.twoD.renderers.DisplayObjectRenderer;

  import flash.display.Bitmap;
  import flash.display.Sprite;

  [SWF(width='600', height='400', frameRate='60', backgroundColor='#000000')]
  
  public class Main extends Sprite
  {
    private var emitter:Emitter2D;
    
    public function Main()
    {
      emitter = new Snowfall();
      
      addChild( new Bitmap( new SnowBackground( 600, 400 ) ) );

      var renderer:DisplayObjectRenderer = new DisplayObjectRenderer();
      renderer.addEmitter( emitter );
      addChild( renderer );
      
      addChild( new Bitmap( new SnowForeground( 600, 400 ) ) );

      emitter.start();
      emitter.runAhead( 10 );
    }
  }
}

package
{
  import org.flintparticles.common.counters.Steady;
  import org.flintparticles.common.displayObjects.RadialDot;
  import org.flintparticles.common.initializers.ImageClass;
  import org.flintparticles.common.initializers.ScaleImageInit;
  import org.flintparticles.twoD.actions.DeathZone;
  import org.flintparticles.twoD.actions.Move;
  import org.flintparticles.twoD.actions.RandomDrift;
  import org.flintparticles.twoD.emitters.Emitter2D;
  import org.flintparticles.twoD.initializers.Position;
  import org.flintparticles.twoD.initializers.Velocity;
  import org.flintparticles.twoD.zones.LineZone;
  import org.flintparticles.twoD.zones.PointZone;
  import org.flintparticles.twoD.zones.RectangleZone;

  import flash.geom.Point;

  public class Snowfall extends Emitter2D
  {
    public function Snowfall()
    {
      counter = new Steady( 150 );
      
      addInitializer( new ImageClass( RadialDot, [2] ) );
      addInitializer( new Position( new LineZone( new Point( -5, -5 ), new Point( 605, -5 ) ) ) );
      addInitializer( new Velocity( new PointZone( new Point( 0, 65 ) ) ) );
      addInitializer( new ScaleImageInit( 0.75, 2 ) );

      addAction( new Move() );
      addAction( new DeathZone( new RectangleZone( -10, -10, 620, 420 ), true ) );
      addAction( new RandomDrift( 20, 20 ) );
    }
  }
}

import org.flintparticles.common.counters.*;
import org.flintparticles.common.displayObjects.RadialDot;
import org.flintparticles.common.initializers.*;
import org.flintparticles.twoD.actions.*;
import org.flintparticles.twoD.emitters.Emitter2D;
import org.flintparticles.twoD.initializers.*;
import org.flintparticles.twoD.renderers.*;
import org.flintparticles.twoD.zones.*;

addChild( new SnowBackground() );

var emitter:Emitter2D = new Emitter2D();

emitter.counter = new Steady( 150 );

emitter.addInitializer( new ImageClass( RadialDot, [2] ) );
emitter.addInitializer( new Position( new LineZone( new Point( -5, -5 ), new Point( 605, -5 ) ) ) );
emitter.addInitializer( new Velocity( new PointZone( new Point( 0, 65 ) ) ) );
emitter.addInitializer( new ScaleImageInit( 0.75, 2 ) );

emitter.addAction( new Move() );
emitter.addAction( new DeathZone( new RectangleZone( -10, -10, 620, 420 ), true ) );
emitter.addAction( new RandomDrift( 20, 20 ) );

var renderer:DisplayObjectRenderer = new DisplayObjectRenderer();
renderer.addEmitter( emitter );
addChild( renderer );

emitter.start();
emitter.runAhead( 10 );

addChild( new SnowForeground() );

<?xml version="1.0" encoding="utf-8"?>
<s:Application
  xmlns:fx="http://ns.adobe.com/mxml/2009" 
  xmlns:s="library://ns.adobe.com/flex/spark"
  xmlns:f="http://flintparticles.org/2009/flint2d"
  width="600" height="400">
  
<fx:Script>
  <![CDATA[
    import org.flintparticles.common.displayObjects.*;
  ]]>
</fx:Script>

<s:BitmapImage source="{new SnowBackground( 600, 400 )}" width="600" height="400"/>
<f:DisplayObjectRenderer id="renderer" width="600" height="400">
  <f:emitters>
    <f:Emitter id="emitter" autoStart="true" runAheadTime="10">
      <f:counter>
        <f:Steady rate="150"/>
      </f:counter>
      <f:initializers>
        <f:Position>
          <f:LineZone startX="-5" startY="-5" endX="605" endY="-5"/>
        </f:Position>
        <f:Velocity>
          <f:PointZone x="0" y="65"/>
        </f:Velocity>
        <f:ImageClass imageClass="{RadialDot}" parameters="{[2]}"/>
        <f:ScaleImageInit minScale="0.75" maxScale="2"/>
      </f:initializers>
      <f:actions>
        <f:Move/>
        <f:DeathZone zoneIsSafe="true">
          <f:RectangleZone left="-10" right="620" top="-10" bottom="420"/>
        </f:DeathZone>
        <f:RandomDrift driftX="20" driftY="20"/>
      </f:actions>
    </f:Emitter>
  </f:emitters>
</f:DisplayObjectRenderer>
<s:BitmapImage source="{new SnowForeground( 600, 400 )}" width="600" height="400"/>
</s:Application>