Attempted access of inaccessible property radius through a reference with static type Ball.

[Mun_Chan]

hai guys...
i dont know why my coding cannot run..
this is the problem that i have to face it..

package

{

import flash.display.Sprite;

import flash.events.Event;

public class Bubbles extends Sprite

{

private var balls:Array;

private var numBalls:Number = 30;

private var bounce:Number = -0.5;

private var spring:Number = 0.05;

private var gravity:Number = 0.1;

public function Bubbles()

{

init();

}

private function init():void

{

balls = new Array();

for(var i:uint = 0; i < numBalls; i++)

{

var ball:Ball = new Ball(Math.random() * 30 + 20,

Math.random() * 0xffffff);

ball.x = Math.random() * stage.stageWidth;

ball.y = Math.random() * stage.stageHeight;

//ball.vx = Math.random() * 6 - 3;

//ball.vy = Math.random() * 6 - 3;

addChild(ball);

balls.push(ball);

}

addEventListener(Event.ENTER_FRAME, onEnterFrame);

}

private function onEnterFrame(event:Event):void

{

for(var i:uint = 0; i < numBalls - 1; i++)

{

var ball0:Ball = balls;

for(var j:uint = i + 1; j < numBalls; j++)

{

var ball1:Ball = balls;

var dx:Number = ball1.x - ball0.x;

var dy:Number = ball1.y - ball0.y;

var dist:Number = Math.sqrt(dx * dx + dy * dy);

var minDist:Number = ball0.radius + ball1.radius;

if(dist < minDist)

{

var angle:Number = Math.atan2(dy, dx);

var tx:Number = ball0.x + Math.cos(angle) *

minDist;

var ty:Number = ball0.y +

Math.sin(angle) *

minDist;

var ax:Number = (tx - ball1.x) *

spring;

var ay:Number = (ty - ball1.y) *

spring;

ball0.vx -= ax;

ball0.vy -= ay;

ball1.vx += ax;

ball1.vy += ay;

}

}

}

for(i = 0; i < numBalls; i++)

{

var ball:Ball = balls;

move(ball);

}

}

private function move(ball:Ball):void

{

ball.vy += gravity;

ball.x += ball.vx;

ball.y += ball.vy;

if(ball.x + ball.radius > stage.stageWidth)

{

ball.x = stage.stageWidth - ball.radius;

ball.vx *= bounce;

}

else if(ball.x - ball.radius < 0)

{

ball.x = ball.radius;

ball.vx *= bounce;

}

if(ball.y + ball.radius > stage.stageHeight)

{

ball.y = stage.stageHeight - ball.radius;

ball.vy *= bounce;

}

else if(ball.y - ball.radius < 0)

{

ball.y = ball.radius;

ball.vy *= bounce;

}

}

}

}

[Ned Murphy · Accepted solution]

The error is telling you that your Ball class does not have a radius property.  Chances are you need to create such a property in that class.

[Grandpa3D]

What is the Ball class. Is it a symbol in the library of the FLA or is it just an AS class file. I think the ball class Ball has an AS file seeing as it takes agruments. If so where is the AS class file located. Is Ball.as in the same folder as Bubbles.as