Thomas de Groot <tho### [at] degrootorg> wrote:

> I should have some little and very ancient program which does this too.
> I need to dig down to the very basements of my backed up files.
> Otherwise, ShellyLib looks nice too. And your Pita baldeaglensis is a
> excellent (except for the internal segmentation of course which is a
> sine qua non for the marble.

I'm thinking of doing the shell and the chambering all in one go with something
like the attached.   It seems like a perfect use for the ovus {} object, if it
gets hollowed out with a rounded cone first.   Then they'd all nest together.

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Bald Eagle wrote on 23/04/2021 23:03:
> Thomas de Groot <tho### [at] degrootorg> wrote:
> 
>> I should have some little and very ancient program which does this too.
>> I need to dig down to the very basements of my backed up files.
>> Otherwise, ShellyLib looks nice too. And your Pita baldeaglensis is a
>> excellent (except for the internal segmentation of course which is a
>> sine qua non for the marble.
> 
> I'm thinking of doing the shell and the chambering all in one go with something
> like the attached.   It seems like a perfect use for the ovus {} object, if it
> gets hollowed out with a rounded cone first.   Then they'd all nest together.
> 

A lot of ways to explore.
We can also use fractal patterns maybe.

Paolo

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Op 26-4-2021 om 15:10 schreef Paolo Gibellini:
> Bald Eagle wrote on 23/04/2021 23:03:
>> Thomas de Groot <tho### [at] degrootorg> wrote:
>>
>>> I should have some little and very ancient program which does this too.
>>> I need to dig down to the very basements of my backed up files.
>>> Otherwise, ShellyLib looks nice too. And your Pita baldeaglensis is a
>>> excellent (except for the internal segmentation of course which is a
>>> sine qua non for the marble.
>>
>> I'm thinking of doing the shell and the chambering all in one go with 
>> something

>> object, if it

>> together.
>>
> 
> A lot of ways to explore.
> We can also use fractal patterns maybe.
> 
> Paolo

  Yes indeed, and especially the chamber sutures of some ammonites are 
fractals like those you show here!

-- 
Thomas

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Paolo Gibellini <p.g### [at] gmailcom> wrote:

> A lot of ways to explore.
> We can also use fractal patterns maybe.

Those came out beautifully!

With a more glassy material (agate?) those would make amzing final renders on
their own   :)

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Op 26/04/2021 om 21:18 schreef Bald Eagle:
> Paolo Gibellini <p.g### [at] gmailcom> wrote:
> 
>> A lot of ways to explore.
>> We can also use fractal patterns maybe.
> 
> Those came out beautifully!
> 
> With a more glassy material (agate?) those would make amzing final renders on
> their own   :)
>

Agreed! What are you waiting for, Paolo!? ;-)

-- 
Thomas

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Thomas de Groot wrote on 27/04/2021 08:39:
> Op 26/04/2021 om 21:18 schreef Bald Eagle:
>> With a more glassy material (agate?) those would make amzing final 
>> renders on

>>
> 
> Agreed! What are you waiting for, Paolo!? ;-)
> 

Ugh... a first try.

Paolo

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Op 28-4-2021 om 14:35 schreef Paolo Gibellini:
> 
> Ugh... a first try.
> 
Aaah... yes, I can imagine a 'marble' table top with such a texture, 
probably as an artificial stone but with such an intriguing/hypnotic 
texture. I like your colour choices btw; they work extremely well 
indeed. I am not entirely certain about the normal though.

-- 
Thomas

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I know I have it ... somewhere.  Way back someone had posted an animation of a
rotating pyramid, showing off sslt.  It was a glassy agate kind of thing with a
great texture and amazing sslt finish.

I know Robert McGregor has done some very nice work employing sslt as well.
Maybe search the archives for sslt scenes and see what sorts of examples you can
find to get where you want faster.

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"Bald Eagle" <cre### [at] netscapenet> wrote:

> I'm thinking of doing the shell and the chambering all in one go with something
> like the attached.   It seems like a perfect use for the ovus {} object, if it
> gets hollowed out with a rounded cone first.   Then they'd all nest together.

A quick cobbling together of an ovus with an ellipsoid subtracted away.
The shell itself renders fairly quickly, the difference to show the cross
section was _slow_ (6.5 min.)

Parameterizing this would be challenging, to get the spiral tightness and
spacing correct while keeping the chambers properly spaced and angled the right
way...

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Op 30-4-2021 om 03:25 schreef Bald Eagle:
> "Bald Eagle" <cre### [at] netscapenet> wrote:
> 
>> I'm thinking of doing the shell and the chambering all in one go with something
>> like the attached.   It seems like a perfect use for the ovus {} object, if it
>> gets hollowed out with a rounded cone first.   Then they'd all nest together.
> 
> A quick cobbling together of an ovus with an ellipsoid subtracted away.
> The shell itself renders fairly quickly, the difference to show the cross
> section was _slow_ (6.5 min.)
> 
> Parameterizing this would be challenging, to get the spiral tightness and
> spacing correct while keeping the chambers properly spaced and angled the right
> way...
> 
Good try. Interested to see how this would show in a rock slab.

I found my old program: Helixir, from the 1990's. Saves mesh{} files but 
not yet sure if it will do.

-- 
Thomas

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