forked from: マウスから逃げる
マウスから逃げます。
// forked from sake's マウスから逃げる
/*
マウスから逃げます。
*/
package
{
import flash.display.BlendMode;
import flash.display.Shape;
import flash.display.Sprite;
import flash.events.Event;
import flash.filters.BlurFilter;
[SWF(width="465", height="465", backgroundColor="0x000000", frameRate="40")]
public class RunAwayFromMouse extends Sprite
{
private var num:int=500;
private var firstPointX:Array=new Array();
private var firstPointY:Array=new Array();
public function RunAwayFromMouse()
{
for(var i:int=0; i < num; i++)
{
var circle:Shape=new Shape();
circle.graphics.beginFill(Math.random() * 0xFFFFFF);
circle.graphics.drawCircle(0, 0, Math.random() * 18 + 5);
circle.graphics.endFill();
circle.blendMode=BlendMode.ADD;
circle.x=Math.round(Math.random() * stage.stageWidth);
circle.y=Math.round(Math.random() * stage.stageHeight);
circle.name="circle" + i.toString();
addChild(circle);
firstPointX[i]=circle.x;
firstPointY[i]=circle.y;
}
addEventListener(Event.ENTER_FRAME, onFrame);
}
public function onFrame(e:Event):void
{
for(var i:int=0; i < num; i++)
{
var circle:Shape=getChildByName("circle" + i.toString())as Shape;
var theta:Number=Math.atan2(circle.y - mouseY, circle.x - mouseX);
var d:Number=1000 / Math.sqrt(Math.pow(mouseX - circle.x, 2) + Math.pow(mouseY - circle.y, 2));
circle.x+=d * Math.cos(theta) + (firstPointX[i] - circle.x) * 0.1;
circle.y+=d * Math.sin(theta) + (firstPointY[i] - circle.y) * 0.1;
}
}
}
}