POV-Ray: Newsgroups: povray.general: map an image on a part of sphere

POV-Ray : Newsgroups : povray.general : map an image on a part of sphere		Server Time 3 Aug 2024 18:24:07 EDT (-0400)

From: Pascal
Subject: map an image on a part of sphere
Date: 1 Jan 2004 17:02:39
Message: <3ff498ff@news.povray.org>

Happy new year to everybody,

I am trying map an image (in png) onto a portion of sphere (say from (0,0)
to (45,45) )

As far as I can tell, it does not seem to be possible using an image_map (or
I did not find the right modifier to do so ..)
If somebody could point me in the right direction to achieve that, I would
be grateful.

Thanks in advance,

--
Pascal.

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From: Florian Brucker
Subject: Re: map an image on a part of sphere
Date: 1 Jan 2004 17:58:31
Message: <3ff4a617$1@news.povray.org>

> I am trying map an image (in png) onto a portion of sphere (say from (0,0)
> to (45,45) )

Look at the thread "how to do ultra-hi-res image_mapping on a sphere?" 
in povray.advanced-users.

HTH
Florian

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From: Pascal
Subject: Re: map an image on a part of sphere
Date: 1 Jan 2004 18:26:12
Message: <3ff4ac94@news.povray.org>


3ff4a617$1@news.povray.org...
> Look at the thread "how to do ultra-hi-res image_mapping on a sphere?"
> in povray.advanced-users.
>
> HTH
> Florian
>

Thanks A LOT ! I missed this one.

The trick is to combine translate and warp{ spherical } to select the
projection area.
I figured the warp part myself, but not the translate ... Good thing I dont
have to resort to "manual" mapping using function ...

Now I can start my 128 pixel/degree  MOLA mars render ...

--
Pascal.

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