Alex Rindo.com

This is an updated version of the original from the flash math creativity book. It was originally done by Keith Peters (http://www.bit-101.com). I’ve divided it into three separate classes to make it more expandable. Email me if you want the original source.

Main.as (Document Class)

package
{
import flash.display.MovieClip;
import flash.display.Shape;
import flash.events.Event;
import flash.geom.Point;

public class Main extends MovieClip
{
private var skeetQuantity:int = 10
private var foodStartingPoint:Point = new Point(280,210)
private var food:Food;

public function Main()
{
addTheFood()
createNewSkeets()
}

private function addTheFood()
{
food = new Food()
food.x = foodStartingPoint.x
food.y = foodStartingPoint.y
}

private function createNewSkeets()
{
for (var i:int = 0; i < skeetQuantity; i++)
{
var skeet:Skeet = new Skeet(food)
skeet.x = Math.random()*500+20;
skeet.y = Math.random()*360+20;
skeet.startEating()
addChild(skeet)
}
addChild(food)
}
}
}

Skeet.as

package
{
import flash.display.Shape;
import flash.events.Event;
import flash.geom.Point;

public class Skeet extends Shape
{
private var capacity:int = 10
private var speed:int = 10
private var ate:Number = 0
private var full:Boolean = true

private var angle:Number;
private var xDistance:Number;
private var yDistance:Number;
private var restingPosition:Point = new Point(0, 0)

private var food:Shape

public function Skeet(_food:Shape)
{
food = _food
drawSkeet()
}

private function drawSkeet()
{
graphics.lineStyle(1,0xFFFFFF,1)
graphics.lineTo(0, 6)
graphics.drawEllipse( -3, 6, 6, 9);
}

public function startEating()
{
addEventListener(Event.ENTER_FRAME, eat)
}

private function eat(e:Event)
{
if (full == true)
{
xDistance = restingPosition.x - this.x;
yDistance = restingPosition.y - this.y;
ate -= .2;

if (ate < 1)
{
full = false;
}
}
else
{
xDistance = food.x - this.x;
yDistance = food.y - this.y;
}

angle = Math.atan2(yDistance, xDistance);
this.rotation = angle * 180 / Math.PI + 90;

//trace("food and skeet hit " + "full " + full)

if (food.hitTestPoint(this.x, this.y, true) && !full)
{
food.scaleX -= .005;
food.scaleY -= .005;

food.x += xDistance / 30;
food.y += yDistance / 30;

ate++;

if (ate > capacity)
{
full = true;
restingPosition.x = Math.random() * 200 - 100 + this.x;
restingPosition.y = Math.random() * 200 - 100 + this.y;
}
}
else
{
this.x += this.xDistance / speed;
this.y += this.yDistance / speed;
}

this.scaleX = 0.4 + ((ate * 10) / 100);
}
}
}

Food.as

package
{
import flash.display.Shape;
import flash.events.Event;
import flash.geom.Point;

public class Food extends Shape
{
private var yTarget:Number = 210

public function Food()
{
drawFood()
addListeners()
}

private function drawFood()
{
graphics.beginFill(0×000,1)
graphics.lineStyle(2,0xFFFFFF,1)
graphics.drawCircle(0, 0, 35)
graphics.endFill()
}

private function addListeners()
{
addEventListener(Event.ENTER_FRAME, checkFoodQuantity)
}

private function checkFoodQuantity(e:Event)
{
if (this.scaleX < 0.1)
{
this.scaleX = this.scaleY = 1;
this.x = Math.random() * 500 + 20;
this.y = 400;
yTarget = Math.random() * 300;
}

this.y += (yTarget - this.y) / 10;
}
}
}

}