Thought I'd have a go at this one...

// Asteroid
#version 3.6;
// ==============================================================
#default{finish{ambient 0}}
#global_settings{assumed_gamma 1.0 max_trace_level 5}

#declare f_bozo1 = // similar to noise3d
function{pigment{bozo scale 0.5 color_map{[0 color rgb 0] [1 color rgb 1]}}}

#declare f_craters =
function{
  pigment{
    crackle form <1.2, 0, 0> // never really played with this one, thaks
Yadgar!
    scale 0.3
    color_map{
      [0.00 color rgb 1.00] // centre of crater, lowest part
      [0.30 color rgb 0.80] //
      [0.35 color rgb 0.40] // rim, higher than surrounding area
      [0.40 color rgb 0.5] // level of area outside the crater
      [1.00 color rgb 0.5]
    }
  }
}

/*
the f_craters function is subtracted from the basic asteroid shape, so the
lowest points get the highest numbers, since you are subtracting more.
*/

// --------------------------------------------------------------
isosurface{
  function{
    (x*x)+(y*y*1.8)+(z*z*1.5)-1 // basic sphere function, scaled to be more
elliptical
    +f_bozo1(x,y,z).red*0.35 // deforms the ellipse shape
    +f_craters(x,y,z).red*0.05 // adjust the '*0.05' part to change the
depth of the craters
  }
  contained_by{box{<-1, -1, -1>, <1, 1, 1>}}
  threshold 0
  accuracy 0.001
  max_gradient 4
  texture{pigment{color rgb 1} finish{diffuse 0.6}}
}

light_source{<-10, 10, -5> color rgb 1}
light_source{< 10, -10, -5> color rgb<0.2, 0.4, 1.0>*0.25}

camera{
  location <0, 1, -4>
  up y*(image_height/image_width)
  right x
  sky y
  look_at <0, 0, 0>
  angle 36
}
// -------------------------------------------------- end of file

Post a reply to this message

Attachments:
Download 'asteroid.jpg' (6 KB)

Preview of image 'asteroid.jpg'

A potato-cheese with holes! Delicious! Nyam!



Doesn't looks very realistic. Might be, the crater edges are to straight. 
And the entire object (asteroid and craters) is too regular, somehow. Not in 
shape, but in surface characteristica. Too plain. Too smooth.

I believe you would be well-advised to consult photos of asteroid or moons 
surfaces to get some good ideas. Surfaces are not really plain but bear tiny 
difference in surface heights and surface roughness.

But your project is promising. Go on, and you will create a great model of 
an asteroid!

Greetings,

Sven

Post a reply to this message

High! ;-))

> For future reference, when greeting people in English, the proper spelling 
> of it is "Hi!" not "High!"

Of course I know... but I use "High!" deliberately as a kind of oxymoron to 
indicate my preferred state of mind , which is, by the way, not induced by 
any chemical additives, but by such mindblowing things like raytracing, 
electronic organs, extrasolar planets and Afghanistan!

See you in Khyberspace!

Yadgar

Post a reply to this message

High!

Sven Littkowski wrote:

> I believe you would be well-advised to consult photos of asteroid or moons 
> surfaces to get some good ideas. Surfaces are not really plain but bear tiny 
> difference in surface heights and surface roughness.

Yes, I've seen this on close-up NEAR photos of (433)Eros... and I had 
some headache to find out how to add such small-scale noise to the 
surface! Should I try noise_generator_3d rather than noise_3d?

See you in Khyberspace!

Yadgar

Post a reply to this message

> High!
> 
> DJ Wiza wrote:
> 
>> For future reference, when greeting people in English, the proper 
>> spelling of it is "Hi!" not "High!"  They are both pronounced the 
>> same, but the meanings are completely different.
> 
> Of course I know... but I deliberately use "High!" as a little pun to 
> indicate my favourite state of mind... which, by the way, is not induced 
> by hemp products, but by such mindblowing things and experiences like 
> raytracing, electronic organs, extrasolar planets, swamp mud orgies and 
> Afghanistan!
> 
> See you in Khyberspace!
> 
> Yadgar
> 
> P. S. Micro$oft Outlook Express sucks!!! I tried to post this already 
> this afternoon (CET) from a workplace computer, which of course runs 
> under Windoze... but it didn't show up at all on the server!
Still using Thunderbird 1.0! That's an antique. Newest is 1.5.0.4.
Both of your messages made it trough.

-- 
Alain
-------------------------------------------------
Never delay the ending of a meeting or the beginning of a cocktail hour.

Post a reply to this message

Dr. Egon Kasper wrote:
> High! ;-))
> 
>>For future reference, when greeting people in English, the proper spelling 
>>of it is "Hi!" not "High!"
> 
> Of course I know... but I use "High!" deliberately as a kind of oxymoron to 
> indicate my preferred state of mind , which is, by the way, not induced by 
> any chemical additives,

'Lo...     ;-)

I always understood your "High" that way.

>                          but by such mindblowing things like raytracing, 
> electronic organs, extrasolar planets and Afghanistan!
> 
> See you in Khyberspace!
> 
> Yadgar 

Besides raytracing and computers, I've always been particularly 
fascinated by pipe organs -- both classic/church style and theater style 
-- and their appropriate music.  (These pipe organ styles are quite 
different both in their sound and in their construction.)

      -=- Larry -=-

Post a reply to this message

I added a few more layers of detail, and some turbulence to the bozo
pigment.  I think it looks much more 'asteroidy' now, and less like an
unfortunate vegetable.

Post a reply to this message

Attachments:
Download 'asteroid.jpg' (32 KB)

Preview of image 'asteroid.jpg'

Mark Birch wrote:
> I added a few more layers of detail, and some turbulence to the bozo
> pigment.  I think it looks much more 'asteroidy' now, and less like an
> unfortunate vegetable.

Absolutely; bravo.

Post a reply to this message

High!

Larry Hudson wrote:

> Besides raytracing and computers, I've always been particularly 
> fascinated by pipe organs -- both classic/church style and theater style 
> -- and their appropriate music.  (These pipe organ styles are quite 
> different both in their sound and in their construction.)

Ah, theatre organs... have you heard this: 
http://www.hauptwerk.co.uk/AudioDemos/Hauptwerk2-MDAWurliTzer1.mp3 ?

Its from the famous Hauptwerk virtual organ project site... really 
groovy sound, I just imagine Richard Rodgers' famous "Slaughter on Tenth 
Avenue" being played on such an organ...

But my interest in organs currently focuses on 70s analogue electronic 
organs (of which of course quite a lot models were built in theatre 
style, for example the Dutch-made Eminent Grand Theatre series, or large 
Kimball organs such as the famous-infamous Xanadu) and of course classic 
electro-magnetic Hammonds.

B-3s are not exactly affordable these days, but at least I own two 70s 
transistorized analogue organs, a budget-class Eminent and a 
middle-class Yamaha (those Japanese organs are just indestructible and 
doing well even after 30 years!). But I still hope to get myself a 
Technics SX-U90 some day... the "dream ship" of my teenage days!

The small Eminent (a Solina P-240) I even started to model with PoV-Ray...

See you in Khyberspace!

Yadgar

Now playing: Is it Love? (Jon and Vangelis)
Now practising: Mr. Sandman

Post a reply to this message

High!

Mark Birch wrote:
> I added a few more layers of detail, and some turbulence to the bozo
> pigment.  I think it looks much more 'asteroidy' now, and less like an
> unfortunate vegetable.

Awesome... shows me how long a way I still have to go! But how long did 
it take to render?

See you in Khyberspace!

Yadgar

Now playing: Back to School (Jon and Vangelis)

Post a reply to this message