Drag and Drop, Collision + Gravity

[cez]

First of all Hello to you all as I am new to the community.

I need some help with flash, bear in mind I am a flash noob.
Basically I am trying to create a greek building made of roof being on top of 4-5 columns standing on top of a fixed position floor, but when you remove one of the pillars the roof will collapse and blow up or something like that

I have found on the web a free script with drag and drop/collision/gravity and i have modified as much as I could and now Im stuck with the objects within the file being circles and the collision works for circles and I need it to be squares/rectangles so it can be replaced with a column later on. I already replaced the circle with a square but the collision still detects it as a circle.


I belive everything within the function collisionDetect() { } is responsible for the detection of the circle shape, have no idea how to modify it though

balls = new Array(); 

for (var i = 0; i < 5; i++) { 
    myBall = attachMovie("ball", "ball" + i, i); 
    balls.push(myBall); 
    myBall.vx = 0; 
    myBall.vy = 0; 
    myBall._x = Math.random() * Stage.width; 
    myBall._y = Math.random() * Stage.height; 
    myBall.onEnterFrame = ballMove; 
    myBall.onPress = ballPress; 
    myBall.onRelease = myBall.onReleaseOutside = function () { 
        stopDrag(); 
        this.onEnterFrame = ballMove; 
    }; 
} 

ballRadius = ball0._width / 2; 
leftWall = 0 + ballRadius; 
rightWall = Stage.width - ballRadius; 
topWall = 0 + ballRadius; 
bottomWall = Stage.height - ballRadius; 
ballLength = balls.length; 
onEnterFrame = function () { 
    collisionDetect(); 
    getEnvironment(); 
}; 
function getEnvironment() { 
    yGravity = 1; 
    friction = 1; 
    frictionShow = Math.abs(Math.round(friction * 100) - 100) + " Friction"; 
    bounce = 0; 
    bounceShow = Math.abs(Math.round(bounce * 100) - 100) + " Bounce"; 
} 
function ballMove() { 
     
    this.vy += yGravity; 
    this.vx += xGravity; 
    this.vy *= friction; 
    this.vx *= friction; 
    this._x += this.vx; 
    this._y += this.vy; 
    if (this._x < leftWall) { 
        this._x = leftWall; 
        this.vx *= -bounce; 
        this.vy *= bounce; 
    } 
    if (this._x > rightWall) { 
        this._x = rightWall; 
        this.vx *= -bounce; 
        this.vy *= bounce; 
    } 
    if (this._y > bottomWall) { 
        this._y = bottomWall; 
        this.vy *= -bounce; 
        this.vx *= bounce; 
    } 
    if (this._y < topWall) { 
        this._y = topWall; 
        this.vy *= -bounce; 
        this.vx *= bounce; 
    } 
} 
function ballPress() { 
    delete this.onEnterFrame; 
    this.onEnterFrame = function() { 
        startDrag(this); 
        this.vx = this._x - this.oldx; 
        this.vy = this._y - this.oldy; 
        this.oldx = this._x; 
        this.oldy = this._y; 
    }; 
} 
function collisionDetect() { 
    for (var i = 0; i < ballLength - 1; i++) { 
        tempBall1 = balls[i]; 
        for (var j = i + 1; j < ballLength; j++) { 
            tempBall2 = balls[j]; 
            var dx = tempBall1._x - tempBall2._x; 
            var dy = tempBall1._y - tempBall2._y; 
            var distance = Math.sqrt(dx * dx + dy * dy); 
            if (distance < ballRadius * 2) { 
                var angle = Math.atan2(dy, dx); 
                var cos = Math.cos(angle); 
                var sin = Math.sin(angle); 
                tempBall1._x = tempBall2._x + cos * (ballRadius * 2); 
                tempBall1._y = tempBall2._y + sin * (ballRadius * 2); 
                tempBall2._x = tempBall1._x - cos * (ballRadius * 2); 
                tempBall2._y = tempBall1._y - sin * (ballRadius * 2); 
                var vx2 = cos * tempBall1.vx + sin * tempBall1.vy; 
                var vy1 = cos * tempBall1.vy - sin * tempBall1.vx; 
                var vx1 = cos * tempBall2.vx + sin * tempBall2.vy; 
                var vy2 = cos * tempBall2.vy - sin * tempBall2.vx; 
                tempBall1.vx = cos * vx1 - sin * vy1; 
                tempBall1.vy = cos * vy1 + sin * vx1; 
                tempBall2.vx = cos * vx2 - sin * vy2; 
                tempBall2.vy = cos * vy2 + sin * vx2; 
            } 
        } 
    } 
}

Ive pasted the code and attached the file for your needs.



Any help would be greatly appreciated.