A couple of isosurface experiments. The first is crackle, the second
granite, both using a pigment function threshold defined by 1-r. Quite nice
to see a finite version of what the patterns actually look like!

Bill

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Attachments:
Download 'iso1.jpg' (70 KB)

Preview of image 'iso1.jpg'

And the other

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Attachments:
Download 'iso2.jpg' (75 KB)

Preview of image 'iso2.jpg'

I like the first one: it seems a stone explosion (or implosion?)
;-)
Paolo

> "Bill Pragnell" wrote:
> A couple of isosurface experiments. The first is crackle, the second
> granite, both using a pigment function threshold defined by 1-r. Quite
nice
> to see a finite version of what the patterns actually look like!
>
> Bill

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Bill Pragnell wrote:
> A couple of isosurface experiments. The first is crackle, the second
> granite, both using a pigment function threshold defined by 1-r. Quite nice
> to see a finite version of what the patterns actually look like!
> 
> Bill
> 
> 
> ------------------------------------------------------------------------
> 

Sweet!  Whenever I try to do something like that (pat a
function into a rough sphere), I get discontinuities: the
edge of the sphere.

And they render too slow.  ;)

-- 
to all the companies who wait until a large user base becomes
dependant on their freeware, then shafting said happy campers with
mandatory payment for continued usage. I spit on your grave.

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> Sweet!  Whenever I try to do something like that (pat a
> function into a rough sphere), I get discontinuities: the
> edge of the sphere.

#declare Cracko = function {
  pigment { crackle turbulence 0.1
            color_map { [0 color rgb 1]
                        [1 color rgb 0] } } }
isosurface { function { Cracko(x*2,y*2,z*2).gray-(1-(x*x+y*y+z*z)/3) }
             max_gradient 5
             contained_by { box { -3, 3 } }
             pigment { color White }
             finish { ambient 0 } }

> And they render too slow.  ;)
Oh yes. Especially with radiosity. These each took about an hour and a half
to render on a 1.2GHz iBook. Although perhaps I shouldn't have been playing
music on it at the same time(!).

B

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Bill Pragnell nous apporta ses lumieres en ce 2005-10-04 09:48:
>>Sweet!  Whenever I try to do something like that (pat a
>>function into a rough sphere), I get discontinuities: the
>>edge of the sphere.
> 
> 
> #declare Cracko = function {
>   pigment { crackle turbulence 0.1
>             color_map { [0 color rgb 1]
>                         [1 color rgb 0] } } }
> isosurface { function { Cracko(x*2,y*2,z*2).gray-(1-(x*x+y*y+z*z)/3) }
>              max_gradient 5
>              contained_by { box { -3, 3 } }
>              pigment { color White }
>              finish { ambient 0 } }
> 
> 
>>And they render too slow.  ;)
> 
> Oh yes. Especially with radiosity. These each took about an hour and a half
> to render on a 1.2GHz iBook. Although perhaps I shouldn't have been playing
> music on it at the same time(!).
> 
> B
> 
Instead of using .gray, try .red or .green or .blue or .x or .y or .z. They all return
the same 
thing when using a plain black to white pattern and are faster: evaluate a single
colour. .gray 
first evaluate each colour and average them. As, in this case, each chanel are
identical, that 
operation is futile.

Playing music rarely take more that 5%CPU and not all the time... In my case, it's
more in the 1~2% 
range, in bursts.

-- 
Alain
-------------------------------------------------
Don't cry because it is over, smile because it
happened.

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Bill Pragnell wrote:
>>Sweet!  Whenever I try to do something like that (pat a
>>function into a rough sphere), I get discontinuities: the
>>edge of the sphere.
> 
> 
> #declare Cracko = function {
>   pigment { crackle turbulence 0.1
>             color_map { [0 color rgb 1]
>                         [1 color rgb 0] } } }
> isosurface { function { Cracko(x*2,y*2,z*2).gray-(1-(x*x+y*y+z*z)/3) }
>              max_gradient 5
>              contained_by { box { -3, 3 } }
>              pigment { color White }
>              finish { ambient 0 } }
> 
> 
>>And they render too slow.  ;)
> 
> Oh yes. Especially with radiosity. These each took about an hour and a half
> to render on a 1.2GHz iBook. Although perhaps I shouldn't have been playing
> music on it at the same time(!).
> 
> B
> 

Woa!  Thanks for posting that code.  That helps a bunch!


-- 
to all the companies who wait until a large user base becomes
dependant on their freeware, then shafting said happy campers with
mandatory payment for continued usage. I spit on your grave.

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