Globals as default input for a method.

Actually, never mind. It was a stupid question. Now I am left with the question of, why doesn't the compiler consider this to be a valid constant?

Const GRAPHICS_WIDTH = 320*Sqr(2)

Thanks again for any help.

You should get an error saying...
Function defaults must be a constant
because they're set at compile time and not runtime.

Because it doesn't know what the return from sqr(2) is going to be at compile time.

No, you cannot do that. You can use a Const as a default input, but not a Global. Like this:

Const test = 1

Type t
	Method a(b = test)
		Print b
	EndMethod
End Type

Another alternative is to use a redundant default parameter (ie. one which you know is incorrect), and then replace it with a global. This isn't exactly nice, but it works:

Global test = 1

Type t
	Method a(b = -9999)
		If b = -9999 Then b = test
		Print b
	EndMethod
End Type

[edit] DOH!

Thanks everyone for your help. The fact that people replied to my post before I even edited it says a lot about this community. The speed of the responses is staggering. For the moment I have just inputted sqr(2) numerically into the constant. Is there a better way?

What do you want to use it for?

There are a whole bunch of graphics functions that need to know the graphics width and graphics height. Their pretty much the only two constants that use sqr(2) in the "game" though.

I don't think I understand.
Why can't they use the standard graphicswidth() and graphicsheight() functions?

The Graphics Width and Height constants that I'm using are used to set the windows dimensions. However, they are also used for a lot of graphics functions that may occur before the window is created. I mean, the method works, it's just slightly cumbersome.

I think the question still remains why 320*sqr(2)?
Unless Im missing something realy obvious