box2D.CreateObject() not obeying image size

[Glitch]

OK. What am I missing here?

Local ball:ftObject
ball = eng.CreateImage("ball.png", x, y)
ball.SetScale(0.5)
ball.SetColType(ftEngine.ctCircle)
ball.SetID(123)

world.CreateObject(ball)

Now, herein lies a problem. The b2D object is twice the size of the image. It doesn't seem to effect it if I make the collision type a box, but then when has a ball been square?

Am I missing something inherently obvious here? Any help appreciated. :)

[Glitch]

So I looked the the cftBox2D.monkey code. Appears there's something amiss with how you are calculating the radius of a circle. So by making a tiny change to the CreateObject method this seems to fix the over-sized Box2D circle.

shapeC = New b2CircleShape(tmpObj.GetHeight()/2/m_physScale)

Slap me down if I'm wrong :)

[Michael Hartlef]

Nah, but thanks. Will test it and fix it.

[Glitch]

You superstar!

[Michael Hartlef]

Thanks, you are to kind! :-)

[Michael Hartlef]

Ok, the problem was that I have calculated the radius of the corner edges. I have changed that now and it should be fixed.

[Glitch]

Great stuff, I no longer have big balls!