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Here is the first stage of a Saturn V I am modeling. I want to get the flame
better than this, but I am not familiar with media. What it needs to be
essentially is a cylinder about 600 feet long and about 12 feet in diameter
that is at the core very hot and white-yellow, but fades to transparent at
the outer radius, then also fades to zero radius at the 600 foot "tail" end.
Somebody must have done this already. Any suggestions?
Jon
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Attachments:
Download 'SaturnV.jpg' (20 KB)
Preview of image 'SaturnV.jpg'
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On Mon, 18 Dec 2000 17:33:25 -0600, Jon Berndt wrote:
>Here is the first stage of a Saturn V I am modeling. I want to get the flame
>better than this, but I am not familiar with media. What it needs to be
>essentially is a cylinder about 600 feet long and about 12 feet in diameter
>that is at the core very hot and white-yellow, but fades to transparent at
>the outer radius, then also fades to zero radius at the 600 foot "tail" end.
>Somebody must have done this already. Any suggestions?
Assuming 1 POV unit per foot:
difference{
sphere{<0,0,0>,12
scale <1,1200,1>
}
cylinder{<0,0,0>,<0,600.1,0>, 12.1}
// Texture/Media stuff goes here.
} // End of difference.
I think that Bob H did one of these (or something similar):
http://users.aol.com/persistenceofv/all.htm
--
Cheers
Steve email mailto:ste### [at] zeropps uklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
12:32am up 11:52, 2 users, load average: 1.00, 1.00, 1.00
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> Assuming 1 POV unit per foot:
>
> difference{
> sphere{<0,0,0>,12
> scale <1,1200,1>
> }
>
> cylinder{<0,0,0>,<0,600.1,0>, 12.1}
>
> // Texture/Media stuff goes here.
>
> } // End of difference.
>
I can get the CSG object stuff easily. It's the "Texture/Media stuff" that
is new to me - actually just the media stuff. Playing in Moray helps out.
> I think that Bob H did one of these (or something similar):
It's a nice image, but the markings and dimensions of the rocket are off. I
am being very precise on measurements and markings and other details.
Jon
Post a reply to this message
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"Jon Berndt" <jsb### [at] hal-pcorg> wrote in message news:3a3ebb84@news.povray.org...
>
> > I think that Bob H did one of these (or something similar):
>
> It's a nice image, but the markings and dimensions of the rocket are off. I
> am being very precise on measurements and markings and other details.
You noticed... :-) I actually never used dimensions based on actual numbers, I
measured a poster-sized photograph I have and followed what looked about right.
It should be fairly close though.
'media' is not very user friendly, everyone knows that. I had trouble putting
5 media objects together because overlaps would mix in odd ways.
Something like this should be a start anyhow:
camera {location -15*z
look_at 0
}
background {rgb .5}
#declare T0=density {rgb 0}
#declare T1=density {wrinkles frequency 1
turbulence <1,3,1>*1
density_map {
[0 rgb <.1,.5,1.25>*0]
[.25 rgb <.667,.5,.3667>*.125]
[.5 rgb <1,.75,.5>*.5]
[.75 rgb <.75,.5,.367>*.25]
[1 rgb <1,.8,.5>*.75]
} scallop_wave scale .4 }
#declare T2=density {wrinkles frequency 1
turbulence <1,3,1>*2
density_map {
[0 rgb <.1,.5,1.25>*0]
[.25 rgb <.667,.5,.3667>*.25]
[.5 rgb <1,.75,.5>*.75]
[.75 rgb <.75,.5,.367>*1.25]
[1 rgb <1,.8,.5>*1.5]
} scallop_wave scale .2 }
sphere { 0, 1 hollow // no_shadow
pigment { color rgbf 1 }
interior {
media { method 2
intervals 1 samples 2,2
emission <.9,.75,.5>*.75
absorption <.25,.33,.5>*.5
scattering {4,<.6,.3,.1>*.5 extinction .5}
density {cylindrical frequency 1
turbulence <1,3,1>*.2
density_map {
[0 T0]
[.5 T1]
[.67 T2]
[.75 T1]
[1 T2]
} ramp_wave scale .99 }
translate -50*clock*y // motion
}
// fade_distance 4 fade_power 1
}
scale <1,4,1> // scale change needs inverse density change
}
(requires MegaPov, as is)
Nice Saturn booster btw.
Bob H.
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> You noticed... :-) I actually never used dimensions based on actual
numbers, I
> measured a poster-sized photograph I have and followed what looked about
right.
> It should be fairly close though.
Nobody but a space nerd would notice ;-)
FYI, a lot of good information can be gleaned from www.apollosaturn.com. I
took a truckload of pictures of the Saturn V lying on it's side here at
Johnson Space Center last week, and I am using those photos, as well.
> 'media' is not very user friendly, everyone knows that. I had trouble
putting
> 5 media objects together because overlaps would mix in odd ways.
> Something like this should be a start anyhow:
>
> ...
I'll take a stab at it. Anyone aware of a media tutorial?
> Nice Saturn booster btw.
Thanks. I hope I can find time to finish it.
Jon
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Great site there, modelers are such perfectionists.
I can see the latest addition to Huntsville Space & Rocket Center from here,
the Saturn V Apollo standing up. They had one already laying down, in
sections.
Lived on Merritt Island between the cape and mainland in FL between 1965 and
1970. Space nerdiness kind of grew on me.
Don't know off-hand where a media tutorial is except for the example files and
"help" documentation. Seems a few people have tried and I know they exist.
Well, come to think of it one in particular:
http://free.prohosting.com/~olana/povray/povray.html
Bob H.
"Jon Berndt" <jsb### [at] hal-pcorg> wrote in message news:3a3fc1bb@news.povray.org...
> > You noticed... :-) I actually never used dimensions based on actual
> numbers, I
> > measured a poster-sized photograph I have and followed what looked about
> right.
> > It should be fairly close though.
>
> Nobody but a space nerd would notice ;-)
>
> FYI, a lot of good information can be gleaned from www.apollosaturn.com. I
> took a truckload of pictures of the Saturn V lying on it's side here at
> Johnson Space Center last week, and I am using those photos, as well.
Post a reply to this message
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> I can see the latest addition to Huntsville Space & Rocket Center from
here,
> the Saturn V Apollo standing up. They had one already laying down, in
> sections.
They've got one standing up!?
Jon
Post a reply to this message
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