Ok, well, we've passed the "my code won't run" phase. But I really do
have a question now that pertains more about how the language works.
Here's my code:
link turtle
link graphics
procedure main()
f := open("testing.txt", "w")
&window := WOpen("size = 400, 400")
write(f, "before drawing, x is ",TX(), " y is ", TY())
FillCircle(150, 150, 100)
WriteImage("filled-circle.gif")
end
& here's my output:
before drawing, x is 320.5 y is 96.5
My question is this--my understanding is that I have opened a window
sized 400x400. My understanding is also that THome() puts the turtle
at the center of the screen, facing north or -90 degrees. Now, I am by
no means a math genius--truthfully, I suck at it--but my expectation
is that a window of 400x400 would have a center at 200,200, +/- a
pixel or so. That should make my center at 200,200, (I think THome()
adds .5, so that would make it 200.5 for both x & y. So why is my x
coordinate 320.5 & my y 96.5? I am really confused now.
I really think it's crucial that I understand what's going on here,
because w/o it I can't place things accurately--that is in fact
already an issue. Any help appreciated. Sorry for the newbie
questions.
--
Blame the computer--why not? It can't defend itself & occasionally
might even be the culprit
Jackie McBride
Jaws Scripting training materials:
www.screenreaderscripting.com
homePage: www.abletec.serverheaven.net
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