LOGO-L> this time without code

[MHELHEFNY@FRCU.EUN.EG]

;Hello Yehuda Katz

;Yehuda Katz wrote:

>Like you, I enjoy too the flow of 3-D creations by mhelhefni. I would
>like to add my feeling, that the achieving of eye-catching pictures is
>done somewhat on account of "good" Logo programming. I mean mainly the
>excessive unnecessary use of global variables (those MAKE statements).

>To demonstrate my point, I took elhefni's Saddle program, removed all
>the MAKE's, re-arranged a little bit here and there, and that's what I
>got:

>===================================================
to go ; Saddle
turnon3d cs ht
draw 14 10 first questionbox[input step (.5 - 1)][]
end

to turnon3d
perspective
setturtle -1
setxyz 1000 1000 1000
setturtle 0 
end

to draw :a :b :step
pu gridx :a :b :step
pu gridz :a :b :step
end

to gridx :a :b :step
for[x -:a :a :step][
   for[z -:b :b :step][
      setxyz :x*15 y*150 :z*15 pd]pu]
end

to gridz :a :b :step
for[z -:b :b :step][
   for[x -:a :a :step][
      setxyz :x*15 y*150 :z*15 pd]pu]
end

to y
op(:x*:x/(:a*:a))-(:z*:z/(:b*:b))
end
>===================================================
>I hope that the creativity of mhelhefni will bring us many more
>interesting and beautiful projects.

;Yes Yehuda; your code is more elegant and I shall rewrite my code of
;the 3-d programs to avoid using "make" ;I think most of the members
;of this list will do the same.
;This month I suddenly was very much excited by the avaialability of the
;3-D extensions of MSWLogo. As you may remember few monthes ago we both
;shared the openion that for the students it was better to use the dos-
;based UCBLogo in order to concentrate on program logic not on windows 
;frills.
;I think this is also the reason why I started writing the code for many
;3-D surfaces without even trying to systematically learn MSWLogo.
;George Mills had done a very good work indeed introducing these 
;wonderfull extensions.
;Tell where in the world you can find such marvellous pepole as George
;Mills and Brian Harvey who can devote such time and effort to the users
; of there free software;and where on the world you can find better 
;members than those of the logo-l.
;Best Regards.
:Mhelhefni  
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