[racket] plot: HOLY MOLEY!

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On 02-11-11 14:55, Laurent wrote:
>> 
>> 
>> Which is just absolutely amazing. But then, just on a total
>> whim, I used the mouse to... grab and turn it ?!??   JAW DROPS
>> OPEN HERE.
>> 
> 
> Wow, that is cool!
> 
> For those who want to try that right away, here is a snippet taken 
> from the docs:
> 
> #lang racket (require plot) (plot3d (list (surface3d (λ (x y) (+ 
> (sqr x) (sqr y))) -1 1 -1 1 #:label "z = x^2 + y^2") (surface3d (λ 
> (x y) (- (+ (sqr x) (sqr y)))) -1 1 -1 1 #:color 4 #:line-color 4 
> #:label "z = -x^2 - y^2")))
> 
> 
> (actually that's a seven-liner ;) )
> 
> Laurent

I just tried this fragment on my current git checkout and got:

inexact->exact: no exact representation for +nan.0

this is on a x86-64 GNU/Linux box

Marijn
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