POV-Ray: Newsgroups: povray.advanced-users: How to address last 2 components of 5-component vectors?: Re: How to address last 2 components of 5-component vectors?

POV-Ray : Newsgroups : povray.advanced-users : How to address last 2 components of 5-component vectors? : Re: How to address last 2 components of 5-component vectors?		Server Time 17 May 2024 21:40:25 EDT (-0400)

From: clipka
Date: 10 Jul 2016 13:43:52
Message: <57828958$1@news.povray.org>

Am 10.07.2016 um 13:03 schrieb Le_Forgeron:
> Le 10/07/2016 12:41, clipka a écrit :
>> Am 10.07.2016 um 05:16 schrieb Bald Eagle:
>>> (curious - Was .hf eliminated, or was it never implemented?)
>>
>> In the 3.6 docs, it is only mentioned in the isosurface tutorial, where
>> it is labeled "experimental", and in the source code it is even labeled
>> as unofficial, for MegaPOV compatibility only.
>>
>> In fact, `.hf` is only available within functions; also, it is intended
>> to produce an "experimental feature" warning (but currently doesn't).
>>
> 
> The code which set the flag is in comment in fncode.cpp ("// TODO
FIXME		Experimental_Flag |= EF_ISOFN;")
> 
> Now, should it remains an experimental feature... I do not know.

The code is bogus (the constant 0.996093 in the formula is not only a
"magic" value, but most certainly wrong), so it sure as hell shouldn't
become canonical in its current form.

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