Crear efecto de estrellas en una fotografia nocturna

Autor & Creditos: Maverick

Vamos a crear un efecto de estrellas encima de una ciudad, tambien este efecto nos podria servir para hacer una bonita postal de navidad.

Ejemplo:

Clic en la Imagen para ver el Video Tutorial

Codigo Actionscript 

stop();
import mx.transitions.Tween;
import mx.transitions.easing.*;
star_mc._visible = false;
var i:Number = 1;
var total:Number = 1000;
var effect_duration:Number = 1.4;

onMouseMove = function()
{
var fm = star_mc.duplicateMovieClip("fm" + i, i );
fm.gotoAndStop( random(fm._totalframes) + 1 );
position_x = _xmouse + random(100) - 50;
position_y = _ymouse + random(100) - 50;

new Tween(fm, "_xscale", Strong.easeOut, 60, 30, effect_duration, true);
new Tween(fm, "_yscale", Strong.easeOut, 60, 30, effect_duration, true);
new Tween(fm, "_alpha", Strong.easeInOut, 100, 0, effect_duration, true);
new Tween(fm, "_x", Strong.easeOut, _xmouse, position_x, effect_duration, true);
fm_tween = new Tween(fm, "_y", Strong.easeOut, _ymouse, position_y, effect_duration, true);

fm_tween.onMotionFinished = function()
{
removeMovieClip(fm);
}
if(i >= total)
{
i = 1;
}
i++;
}