En el siguiente ejemplo de código se utilizan varios filtros básicos combinados con un temporizador para crear una simulación animada de la acción repetitiva de un semáforo.
import flash.display.Shape;
import flash.events.TimerEvent;
import flash.filters.BitmapFilterQuality;
import flash.filters.BitmapFilterType;
import flash.filters.DropShadowFilter;
import flash.filters.GlowFilter;
import flash.filters.GradientBevelFilter;
import flash.utils.Timer;
var count:Number = 1;
var distance:Number = 8;
var angleInDegrees:Number = 225; // opposite of 45 degrees
var colors:Array = [0xFFFFCC, 0xFEFE78, 0x8F8E01];
var alphas:Array = [1, 0, 1];
var ratios:Array = [0, 128, 255];
var blurX:Number = 8;
var blurY:Number = 8;
var strength:Number = 1;
var quality:Number = BitmapFilterQuality.HIGH;
var type:String = BitmapFilterType.INNER;
var knockout:Boolean = false;
// Draw the rectangle background for the traffic light.
var box:Shape = new Shape();
box.graphics.lineStyle();
box.graphics.beginFill(0xFEFE78);
box.graphics.drawRect(100, 50, 90, 200);
box.graphics.endFill();
// Draw the 3 circles for the three lights.
var stopLight:Shape = new Shape();
stopLight.graphics.lineStyle();
stopLight.graphics.beginFill(0xFF0000);
stopLight.graphics.drawCircle(145,90,25);
stopLight.graphics.endFill();
var cautionLight:Shape = new Shape();
cautionLight.graphics.lineStyle();
cautionLight.graphics.beginFill(0xFF9900);
cautionLight.graphics.drawCircle(145,150,25);
cautionLight.graphics.endFill();
var goLight:Shape = new Shape();
goLight.graphics.lineStyle();
goLight.graphics.beginFill(0x00CC00);
goLight.graphics.drawCircle(145,210,25);
goLight.graphics.endFill();
// Add the graphics to the display list.
addChild(box);
addChild(stopLight);
addChild(cautionLight);
addChild(goLight);
// Apply a gradient bevel to the traffic light rectangle.
var gradientBevel:GradientBevelFilter = new GradientBevelFilter(distance, angleInDegrees, colors, alphas, ratios, blurX, blurY, strength, quality, type, knockout);
box.filters = [gradientBevel];
// Create the inner shadow (for lights when off) and glow
// (for lights when on).
var innerShadow:DropShadowFilter = new DropShadowFilter(5, 45, 0, 0.5, 3, 3, 1, 1, true, false);
var redGlow:GlowFilter = new GlowFilter(0xFF0000, 1, 30, 30, 1, 1, false, false);
var yellowGlow:GlowFilter = new GlowFilter(0xFF9900, 1, 30, 30, 1, 1, false, false);
var greenGlow:GlowFilter = new GlowFilter(0x00CC00, 1, 30, 30, 1, 1, false, false);
// Set the starting state of the lights (green on, red/yellow off).
stopLight.filters = [innerShadow];
cautionLight.filters = [innerShadow];
goLight.filters = [greenGlow];
// Swap the filters based on the count value.
function trafficControl(event:TimerEvent):void
{
if (count == 4)
{
count = 1;
}
switch (count)
{
case 1:
stopLight.filters = [innerShadow];
cautionLight.filters = [yellowGlow];
goLight.filters = [innerShadow];
break;
case 2:
stopLight.filters = [redGlow];
cautionLight.filters = [innerShadow];
goLight.filters = [innerShadow];
break;
case 3:
stopLight.filters = [innerShadow];
cautionLight.filters = [innerShadow];
goLight.filters = [greenGlow];
break;
}
count++;
}
// Create a timer to swap the filters at a 3 second interval.
var timer:Timer = new Timer(3000, 9);
timer.addEventListener(TimerEvent.TIMER, trafficControl);
timer.start();
