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On 21.08.2017 01:36, Kenneth wrote:
> clipka <ano### [at] anonymousorg> wrote:
>> Am 20.08.2017 um 00:51 schrieb Kenneth:
>
>>> I actually didn't know (or remember?) that there was a *default*
>>> inside_vector.
>>> I should have re-read the docs; it has been awhile re: this topic.
>>
>> Not sure where that quote is from, but if it ever was true, it has been
>> outdated for a long time.
>>
>> Fact is, in current versions of POV-Ray the default value for the
>> `inside_vector` parameter is the null vector (`<0,0,0>`), which is used
>> as a special value to turn off that feature.
>
> Yes, IIRC that agrees with my own v3.6xx experience using meshes (i.e., t
here's
> no *useful* default inside_vector.) I haven't actually used a mesh in awh
ile,
> though.
>
> BTW, this opens up a small 'can of worms' regarding SHAPES.INC: The vario
us
> mesh-generation macros there do not add an inside_vector, which precludes
those
> meshes being used in (other than union) CSG, as they are not generally #w
ritten
> to a file but used 'internally' by POV-Ray, so to speak. However, the
> HFCREATE() macro near the end of that file CAN be used to #write a mesh t
o a
> text file for later use-- but it lacks an inside_vector as well. I modifi
ed my
> own SHAPES.INC file years ago, to add that feature to HFCREATE-- but I cu
rrently
> can't find it :-( I don't know for sure if an *arbitrary* vector can be a
dded
> there, although my own experience was that it worked OK (as I never creat
ed an
> 'open' mesh with Shapes.inc...although a few of the macros may allow open
meshes
> as an option. I think the 'cylinder mesh' macro may be one. In which case
an
> arbitrary vector would be hit-or-miss. <0,1,0> would probably work most o
f the
> time, I'm guessing.)
>
> Just wanted to mention this for future thought. And I apologize for getti
ng way
> off-topic...
>
>
>
>
>
No problem, it is a good off-topic that I follow with great interest. It
makes this discussion richer.
Besides, this thread has been closed already by me, a few days ago, with
a final statement. There is a new thread, and I invite you all to join
there:
"Solidifying a Mesh Object".
But I am going to open yet another thread, inside the IMAGE group. I
will call it
"The POV-Ray Base on Mars",
and invite you all even more to join this project if you like (yes,
project, it is not just a threat).
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