Yo,

Just a quick guess, but as far as maintaining same level as if gravity, even 
with rotation:
Have a solid section of "ink" and a solid bottle equal in size to the 
interior of the bottle, and just use csg intersection textured to be "ink"..
For volume adjustment, obviously one would simply raise or lower the solid 
"ink", which would then have intersection performed on it.

While possessing no fluid dynamics, I think the effect would be sufficient.

Dunno about meshes, but with "solid" pov primitives, it should work...

Now using media or blobs or something to accurately simulate fluid dynamics, 
like if you shook the thing up....well someone else can figure that one 
out...lol!!

Ian

"Jim Charter" <jrc### [at] msncom> wrote in message 
news:47ae93e1@news.povray.org...
> Nicolas Alvarez wrote:
>> How about ink inside? :)
>>
>> Is it at all possible (even if extremely hard) to make it so users set
>> the *volume* of ink, and it automatically figures out its "height", even
>> when the bottle is rotated? I would surely have no idea how to even
>> start coding the needed calculations...
> Neither would I.
>
> Ink bottles also can have labels which is another issue I am struggling
> with.  Though it should be possible to generate some uv coordinates for
> simple cases.
>
> But there are graver issues with the usability of the macro which makes
> me question its overall usefulness. Afterall this bottle could be
> modelled and exported from a mesh modeller in 15 minutes, tops. For
> instance, the positioning and rate of the transition from a 'sided'
> cross section to round cross section of the neck is presently
> interdependent with things like the density of the mesh.
>
> Here is another bottle, and some ink in the earlier one
>

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