[sourcecode language=”java”]
package
{
import flash.display.Sprite;
import flash.display.StageAlign;
import flash.display.StageScaleMode;
import flash.events.Event;
public class Fountain extends Sprite
{
private var count:int = 100;
private var balls:Array;
private var gravity:Number = 0.5; //重力
private var window:Number = 0.1; //風
public function Fountain()
{
init();
}
private function init():void
{
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align=StageAlign.TOP_LEFT;
balls = new Array();
for(var i:int = 0; i < count; i++)
{
var ball:Ball = new Ball(2, Math.random() * 0xffffff);
ball.x = stage.stageWidth / 2;
ball.y = stage.stageHeight;
//5 – 2.5 ブレ幅
ball.vx = Math.random() * 5 – 2.5;
//必ずマイナスになるから上に向かって飛ぶ
ball.vy = Math.random() * -10 – 10;
addChild(ball);
balls.push(ball);
}
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
private function onEnterFrame(event:Event):void
{
for(var i:Number = 0; i < balls.length; i++){
var ball:Ball = Ball(balls[i]);
ball.vy += gravity;
ball.vx += window;
ball.x += ball.vx;
ball.y += ball.vy;
if(ball.x – ball.radius > stage.stageWidth ||
ball.x + ball.radius < 0 ||
ball.y – ball.radius > stage.stageHeight ||
ball.y + ball.radius < 0)
{
ball.x = stage.stageWidth / 2;
ball.y = stage.stageHeight;
ball.vx = Math.random() * 5 – 2.5;
ball.vy = Math.random() * -10 – 10;
}
}
}
}
}
[/sourcecode]