[sourcecode language=”java”]
package
{
import flash.display.Sprite;
import flash.events.Event;
public class Spring5 extends Sprite
{
private var ball:Ball;
private var spring:Number = 0.1;
private var targetX:Number = stage.stageWidth / 2;
private var targetY:Number = stage.stageHeight / 2;
private var vx:Number = 0;
private var vy:Number = 0;
private var friction:Number = 0.95; //摩擦
private var gravity:Number = 5; //重力
public function Spring5()
{
init();
}
private function init():void
{
ball = new Ball();
addChild(ball);
addEventListener(Event.ENTER_FRAME, onEnterFrame);
}
private function onEnterFrame(event:Event):void
{
var dx:Number = mouseX – ball.x;
var dy:Number = mouseY – ball.y;
var ax:Number = dx * spring;
var ay:Number = dy * spring;
vx += ax;
vy += ay;
vy += gravity;
vx *= friction;
vy *= friction;
ball.x += vx;
ball.y += vy;
graphics.clear();
graphics.lineStyle(1);
graphics.moveTo(ball.x, ball.y);
graphics.lineTo(mouseX, mouseY);
}
}
}
[/sourcecode]
今までやったことあったけど、線一本でこんなに面白く見えることが驚き