Re: LOGO-L> Curve Stitching with Logo

[Yehuda <yehuka@beitberl.ac.il>]

Charles T. Smith wrote:

> Hello Yehuda,
>
> At 8:27 PM +0300 6/28/1998, Yehuda wrote:
> >Here's a different approach to draw Cardioid and Nephroid. The following short
> >codes are for MSWLogo and UCBLogo. The Cardioid and the Nephroid are the
> >envelope of the relevant images:
>
> I was not able to make the following work in UCBLogo. My version (v4.6)
> choked on setsc and circle. (I tried an earlier version of MSWLogo, but had
> the same results.) I assume that setsc is like setbg, but I wasn't sure how
> circle was supposed to work. My guess is that :rad is radius. Can you
> enlighten me on how circle works. Is it a procedure in your library?
>
> I am not sure what you mean by "envelope of the relevant images." That
> might become clear, though, when I get it to work.
>
> Thanks for the help. This "string art" is a blast!
>
> Chuc
>
> >
> >to main ; Cardioid
> >cs ht pu rt 90
> >setsc 0 setpc 6 draw 35
> >end
> >
> >to draw :rad
> >repeat 32[fd :rad pd
> >   circle distance se 0 :rad
> >   pu bk :rad rt 360/32]
> >end
> >
> >============================
> >
> >to main ; Nephroid
> >cs ht pu
> >setsc 0 setpc 4 draw 46
> >end
> >
> >to draw :size
> >repeat 32[fd :size pd
> >   circle xcor
> >   pu bk :size rt 360/32]
> >end

Hi Chuck,

You are right, I'm sorry. For UCBLogo please replace SETSC 0 by SETBG 0, and CIRCLE
:RAD by ARC 360 :RAD.

I attach the resulting images (you can find them also in
http://www.geocities.com/CollegePark/lab/2276/ ).

Regards...

[[Yehuda]]

    _/    _/     _/ _/_/_/_/_/ _/_/_/_/
   _/   _/     _/_/    _/          _/
  _/_/_/     _/  _/   _/        _/
 _/   _/   _/_/_/_/  _/      _/
_/     _/_/      _/ _/     _/_/_/_/

http://www.geocities.com/CollegePark/lab/2276/