POV-Ray: Newsgroups: povray.advanced-users: a planet

POV-Ray : Newsgroups : povray.advanced-users : a planet		Server Time 30 Jul 2024 14:18:01 EDT (-0400)

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From: Chris Huff
Subject: Re: a planet
Date: 16 Aug 1999 08:58:46
Message: <37B80B2F.B7AC0158@compuserve.com>

>You will not actually see any gradation of a color_map used on a
sphere however unless it is CSG'd with another object, ie cut in half
with a plane.<

Yes, and then you will only see it if the plane has the same texture.

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From: Chris Huff
Subject: Re: a planet
Date: 16 Aug 1999 09:03:45
Message: <37B80C59.E7457AF4@compuserve.com>

>won't it just look like it's a blend of all the colors not a gradient?<

Objects in POV are not really solid, they are made of an infinitely thin
mathematical surface. The color of the surface depends on the color of
the pigment *at that point*(temporarily forgetting about transparency,
reflection, etc). If a spherical pattern is used on  a plain sphere, you
will see a sphere with a color the same as the last color in the
color_map. If you cut it in half with a plane, and texture the cutting
plane with the same texture as the sphere, you will see a half-sphere(a
hemisphere)  and the gradient from the center outward on the cut side.

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From: Ken
Subject: Re: a planet
Date: 17 Aug 1999 01:49:31
Message: <37B8F7DB.37740041@pacbell.net>

Chris Huff wrote:
> 
> >You will not actually see any gradation of a color_map used on a
> sphere however unless it is CSG'd with another object, ie cut in half
> with a plane.<
> 
> Yes, and then you will only see it if the plane has the same texture.

...or your sphere is transparent.

-- 
Ken Tyler

See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

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From: PoD
Subject: Re: a planet
Date: 17 Aug 1999 18:07:40
Message: <37B9DDAD.B709FE46@merlin.net.au>

Ken wrote:
> 
> Chris Huff wrote:
> >
> > >You will not actually see any gradation of a color_map used on a
> > sphere however unless it is CSG'd with another object, ie cut in half
> > with a plane.<
> >
> > Yes, and then you will only see it if the plane has the same texture.
> 
> ...or your sphere is transparent.
> 
> --
> Ken Tyler
> 
> See my 700+ Povray and 3D Rendering and Raytracing Links at:
> http://home.pacbell.net/tylereng/index.html

...or the texture on the sphere has turbulence.
That's the way I do planets - sphere, onion, turbulence.

Cheers, PoD.

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From: Ken
Subject: Re: a planet
Date: 17 Aug 1999 18:15:16
Message: <37B9DEE8.F2533A20@pacbell.net>

PoD wrote:
> 
> Ken wrote:
> >
> > Chris Huff wrote:
> > >
> > > >You will not actually see any gradation of a color_map used on a
> > > sphere however unless it is CSG'd with another object, ie cut in half
> > > with a plane.<
> > >
> > > Yes, and then you will only see it if the plane has the same texture.
> >
> > ...or your sphere is transparent.
> >
> > --
> > Ken Tyler
> >
> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
> > http://home.pacbell.net/tylereng/index.html
> 
> ...or the texture on the sphere has turbulence.
> That's the way I do planets - sphere, onion, turbulence.
> 
> Cheers, PoD.

... or the texture is translated to some point from the origin or...

-- 
Ken Tyler

See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

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From: Cliff Bowman
Subject: Re: a planet
Date: 19 Aug 1999 13:20:43
Message: <37bc1259.57581187@news.povray.org>

On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:

>
>
>PoD wrote:
>> 
>> Ken wrote:
>> >
>> > Chris Huff wrote:
>> > >
>> > > >You will not actually see any gradation of a color_map used on a
>> > > sphere however unless it is CSG'd with another object, ie cut in half
>> > > with a plane.<
>> > >
>> > > Yes, and then you will only see it if the plane has the same texture.
>> >
>> > ...or your sphere is transparent.
>> >
>> > --
>> > Ken Tyler
>> >
>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
>> > http://home.pacbell.net/tylereng/index.html
>> 
>> ...or the texture on the sphere has turbulence.
>> That's the way I do planets - sphere, onion, turbulence.
>> 
>> Cheers, PoD.
>
>... or the texture is translated to some point from the origin or...
>
the texture is applied *after* the CSG, or...

Cheers,

Cliff Bowman
Why not pay my 3D Dr Who site a visit at http://www.who3d.cwc.net/

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From: Mark Wagner
Subject: Re: a planet
Date: 20 Aug 1999 02:54:47
Message: <37bcfbb7@news.povray.org>

Cliff Bowman wrote in message <37bc1259.57581187@news.povray.org>...
>On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:
>
>>
>>
>>PoD wrote:
>>>
>>> Ken wrote:
>>> >
>>> > Chris Huff wrote:
>>> > >
>>> > > >You will not actually see any gradation of a color_map used on a
>>> > > sphere however unless it is CSG'd with another object, ie cut in
half
>>> > > with a plane.<
>>> > >
>>> > > Yes, and then you will only see it if the plane has the same
texture.
>>> >
>>> > ...or your sphere is transparent.
>>> >
>>> > --
>>> > Ken Tyler
>>> >
>>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
>>> > http://home.pacbell.net/tylereng/index.html
>>>
>>> ...or the texture on the sphere has turbulence.
>>> That's the way I do planets - sphere, onion, turbulence.
>>>
>>> Cheers, PoD.
>>
>>... or the texture is translated to some point from the origin or...
>>
>the texture is applied *after* the CSG, or...
>
you give up on POVRay and do the picture using MS Paint or...
:-)
Mark

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From: Edward C
Subject: Re: a planet
Date: 22 Aug 1999 02:51:04
Message: <37bf9dd8@news.povray.org>

Mark Wagner wrote in message <37bcfbb7@news.povray.org>...
>
>Cliff Bowman wrote in message <37bc1259.57581187@news.povray.org>...
>>On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:
>>
>>>
>>>
>>>PoD wrote:
>>>>
>>>> Ken wrote:
>>>> >
>>>> > Chris Huff wrote:
>>>> > >
>>>> > > >You will not actually see any gradation of a color_map used on a
>>>> > > sphere however unless it is CSG'd with another object, ie cut in
>half
>>>> > > with a plane.<
>>>> > >
>>>> > > Yes, and then you will only see it if the plane has the same
>texture.
>>>> >
>>>> > ...or your sphere is transparent.
>>>> >
>>>> > --
>>>> > Ken Tyler
>>>> >
>>>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
>>>> > http://home.pacbell.net/tylereng/index.html
>>>>
>>>> ...or the texture on the sphere has turbulence.
>>>> That's the way I do planets - sphere, onion, turbulence.
>>>>
>>>> Cheers, PoD.
>>>
>>>... or the texture is translated to some point from the origin or...
>>>
>>the texture is applied *after* the CSG, or...
>>
>you give up on POVRay and do the picture using MS Paint or...
>:-)
>Mark
>
... you scale the sphere unevenly before you apply the texture or...

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From: Ken
Subject: Re: a planet
Date: 22 Aug 1999 02:57:17
Message: <37BF9F28.23B453BD@pacbell.net>

"Edward C." wrote:
> 
> Mark Wagner wrote in message <37bcfbb7@news.povray.org>...
> >
> >Cliff Bowman wrote in message <37bc1259.57581187@news.povray.org>...
> >>On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:
> >>
> >>>
> >>>
> >>>PoD wrote:
> >>>>
> >>>> Ken wrote:
> >>>> >
> >>>> > Chris Huff wrote:
> >>>> > >
> >>>> > > >You will not actually see any gradation of a color_map used on a
> >>>> > > sphere however unless it is CSG'd with another object, ie cut in
> >half
> >>>> > > with a plane.<
> >>>> > >
> >>>> > > Yes, and then you will only see it if the plane has the same
> >texture.
> >>>> >
> >>>> > ...or your sphere is transparent.
> >>>> >
> >>>> > --
> >>>> > Ken Tyler
> >>>> >
> >>>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
> >>>> > http://home.pacbell.net/tylereng/index.html
> >>>>
> >>>> ...or the texture on the sphere has turbulence.
> >>>> That's the way I do planets - sphere, onion, turbulence.
> >>>>
> >>>> Cheers, PoD.
> >>>
> >>>... or the texture is translated to some point from the origin or...
> >>>
> >>the texture is applied *after* the CSG, or...
> >>
> >you give up on POVRay and do the picture using MS Paint or...
> >:-)
> >Mark
> >
> ... you scale the sphere unevenly before you apply the texture or...

...you scale the texture small enough that you get multiple iterations or...

-- 
Ken Tyler

See my 700+ Povray and 3D Rendering and Raytracing Links at:
http://home.pacbell.net/tylereng/index.html

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From: Larry Fontaine
Subject: Re: a planet
Date: 4 Sep 1999 21:34:44
Message: <37D1C70F.E367E4FD@isd.net>

Mark Wagner wrote:

> Cliff Bowman wrote in message <37bc1259.57581187@news.povray.org>...
> >On Tue, 17 Aug 1999 15:15:04 -0700, Ken <tyl### [at] pacbellnet> wrote:
> >
> >>
> >>
> >>PoD wrote:
> >>>
> >>> Ken wrote:
> >>> >
> >>> > Chris Huff wrote:
> >>> > >
> >>> > > >You will not actually see any gradation of a color_map used on a
> >>> > > sphere however unless it is CSG'd with another object, ie cut in
> half
> >>> > > with a plane.<
> >>> > >
> >>> > > Yes, and then you will only see it if the plane has the same
> texture.
> >>> >
> >>> > ...or your sphere is transparent.
> >>> >
> >>> > --
> >>> > Ken Tyler
> >>> >
> >>> > See my 700+ Povray and 3D Rendering and Raytracing Links at:
> >>> > http://home.pacbell.net/tylereng/index.html
> >>>
> >>> ...or the texture on the sphere has turbulence.
> >>> That's the way I do planets - sphere, onion, turbulence.
> >>>
> >>> Cheers, PoD.
> >>
> >>... or the texture is translated to some point from the origin or...
> >>
> >the texture is applied *after* the CSG, or...
> >
> you give up on POVRay and do the picture using MS Paint or...
> :-)
> Mark

You mean like this?

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