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Re: [LogoForum] Graphing Utility

by "John St. Clair" <john.stclair@[EMAIL PROTECTED] > Jan 11, 2008 at 04:58 AM

The message below is being cross-posted from the LogoForum.  Please 
reply here at comp.lang.logo and it will be cross-posted back to the 
LogoForum.  The original author of this message is 
pavel@[EMAIL PROTECTED]
 wrote:
> I'm using Elica 5.4 and I "copied and pasted" your procedure but I 
> only get an error message:
> 
> "UNKNOWN VARIABLE OR COMMAND [SINGLEBUFFER]" ¿?

It's because the command SINGLEBUFFER does not exist in Elica 5.4. Try 
this example, I hope it will work with 5.4 (it also works with 5.6)

run "graphix
lookat (vector 0 0 20) (vector 0 0 0) (vector 0 1 0)

make "Ox segment (point -3 0) (point 3 0)
make "Oy segment (point 0 -5) (point 0 5)

make "x -2
make "i 0
make "p set
make "n set

repeat 400
[
make "p(:i) point :x :x*:x
make "n(:i) point :x 0-:x*:x
make "x :x+0.01
make "i :i+1
]

> perspective 3D mode. I really love this characteristic. But, maybe, 
> it would be necessary to have another kind of 3D mode: the "non-
> human vision" 3D. You known, something like some games (Sims, Age of 
> Empires, etc). I don't like that way but, maybe, it would be useful 
> to some kind of 3D geometry problems. Just an idea.

Elica can show such type of 3D by using orthogonal projection (which 
means there will be no perspective and objects far from the view point 
will not get smaller).

-Pavel

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 1 Posts in Topic:
Re: [LogoForum] Graphing Utility
"John St. Clair"  2008-01-11 04:58:43 

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tan12V112 Thu May 15 1:04:55 CDT 2008.