Re: LOGO-L> Ellipses

["Bill Kerr" <kerrb@senet.com.au>]

Here is how to draw an ellipse

s = size
e = eccentricity

to ellipse :s :e
pd
local "n make "n 0
repeat 360[rt :n fd :s lt :n lt :n fd :s * :e rt :n  make "n :n + 1]
end

Try these: type in the command centre --
ellipse .8 .2
ellipse .8 -.2

George, I've spent a bit of time with the above procedure but can't claim to
understand it, unfortunately! So I'm giving it to Adam as is. Very unsound I
know but in all learning there is a balance between frustration and getting
ahead. If George or anyone else can explain how this procedure works then
I'll have another look at it. I just give it to the year 8's and let them
play with it; it's still fascinating without understanding it but, yes, I
would like to understand it too.

-- Bill Kerr


>I am trying to get a turtle in  microworlds to glide in the shape of an
>ellipse.  Is there a command that will do this.  In MSWLogo, there is
>ellipsearc.  Can anybody tell me how to get the definition of ellipsearc if
>there is no command in microworlds.  thank you.
>
>-adam


---------------------------------------------------------------
Please post messages to the Logo forum to logo-l@gsn.org.  Mail
questions about the list administration to logofdn@gsn.org.  To
unsubscribe send    unsubscribe logo-l    to majordomo@gsn.org.