POV-Ray: Newsgroups: povray.binaries.images: Megpov: how to do a superelipse? Do we need x^p=sign(x)*|x|^p?: Re: Megpov: how to do a superelipse? Do we need x^p=sign(x)*|x|^p?

POV-Ray : Newsgroups : povray.binaries.images : Megpov: how to do a superelipse? Do we need x^p=sign(x)\|x\|^p? : Re: Megpov: how to do a superelipse? Do we need x^p=sign(x)\|x\|^p?		Server Time 19 Aug 2024 06:20:24 EDT (-0400)

From: Peter J Holzer
Date: 4 Jan 2001 18:14:09
Message: <slrn959rm9.2k0.hjp-usenet@teal.h.hjp.at>

On Thu, 04 Jan 2001 09:03:03 -0500, Greg M. Johnson wrote:
>Chris Huff wrote:
>
>> Uh, I think "x^n = pow(x, n)" is more likely...
>
>And is that undefined for  negative x and noninteger n? 

It is undefined for negative x and nonintegral _values_ of n.
pow(-3.14, 2.0) is well defined (apart from rounding effects). 

	hp

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