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Am 02.12.2013 04:31, schrieb Cousin Ricky:
> Ive <ive### [at] lilysoft org> wrote:
>> Coincidental I'm just about to release version 0.2 (within the next few
>> hours, just one more example scene to render) so in case you are willing
>> to share your addition (AFAIR gamut mapping was on my to-do-list anyway)
>> your contribution would be quite welcome.
>
> It is a modification to SpectralComposer.pov, which I also converted to a .inc
> file because I prefer that to modifying a library file for each project. Should
> I email it to you?
>
Please do so!
>> Note that HDR values are not addressed by gamut-mapping but are again an
>> art of its own.
>
> And I see that's also on your to-do list, although UberPOV /may/ make that job
> easier.
>
Yes, as far as I understand it, Christoph did implement some kind of
HDR-tonemapping but I didn't try it myself yet. Anyway, I would prefer
to have just official POV-Ray as requirement.
>> Personally I do prefer to do stuff like this as post-processing.
>
> That would certainly be faster than doing it with SDL. However, I'm not sure
> that the wrap-around that often happens with POV-Ray pigment functions won't
> thwart that when the entire render is a giant pigment function.
>
Well, that is what HDR_min and HDR_max are meant for - and it should
work, in case I didn't make a stupid mistake somewhere that is ;)
> (Otherwise, couldn't we do the gamut mapping in post-processing as well?)
>
Yes, sure, but writing SDL code is kinda fun and reading it might even
be interesting for people who would otherwise not care about some C++
code ;)
-Ive
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