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On Wed, 3 Apr 2002 00:31:53 +0200, "JRG" <jrg### [at] hotmail com> wrote:
> > In my definition it's an infinite volume which makes an infinite object.
>
> But we're talking about POV-Ray's definition, aren't we?
I have digged documentation to find definition of finite/infinite and passed so
therefore reffered to my definition. My definition and my tests tell me that
inversed box has finite surface and infinite volume and therefore differenced
with another object can make infinite result.
ABX
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JRG <jrg### [at] hotmailcom> wrote:
> Try any other difference which does not contain a heightfield: do you get an
infinite
> object? (That could be a problem concerning h-f).
This may need a bit of researching.
--
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -
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> I have digged documentation to find definition of finite/infinite and passed so
> therefore reffered to my definition. My definition and my tests tell me that
> inversed box has finite surface and infinite volume and therefore differenced
> with another object can make infinite result.
However, the difference of two boxes is not infinite.
--
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -
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On Wed, 3 Apr 2002 00:52:43 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> Like ABX you are thinking in terms of volumes. POV-Ray dislikes that concept.
Try to make sphere as poly (ready script in documentation of 3.5 ) and tell me
is it finite or infinite ? It has finite surface.
ABX
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On Wed, 3 Apr 2002 00:47:29 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> > > So a finite bounding_box _means_ a finite object.
> >
> > I never saw basic trick with bounding box near camera probably.
>
> I'm not sure what you want to say.
Somehow I placed I instead of You. It's becouse of 24 hours at work.
> Which trick?
Currently I can't find most typical animation of this type of trick/technic.
ABX
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That's different. POV-Ray doesn't have a clue about how big the poly object may
result (but I can be wrong here. Never used it before.)
I think with poly objects manual bounding is a good habit (note that a bounding box
makes it a finite object: i.e. it cannot exist an infinite object with a finite
bounding box).
--
Jonathan.
Home: http://digilander.iol.it/jrgpov
news:nsekau8uqei7hucgtorjd3f8pv1n8chn4e@4ax.com...
> On Wed, 3 Apr 2002 00:52:43 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> > Like ABX you are thinking in terms of volumes. POV-Ray dislikes that concept.
>
> Try to make sphere as poly (ready script in documentation of 3.5 ) and tell me
> is it finite or infinite ? It has finite surface.
>
> ABX
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"JRG" wrote:
> That's different. POV-Ray doesn't have a clue about how big the poly object may
> result (but I can be wrong here. Never used it before.)
> I think with poly objects manual bounding is a good habit (note that a bounding box
> makes it a finite object: i.e. it cannot exist an infinite object with a finite
> bounding box).
Here's my new definition: a finite object is an object with a finite bounding box.
Everything else is infinite. He he.
--
Jonathan.
Home: http://digilander.iol.it/jrgpov
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On Wed, 3 Apr 2002 01:28:49 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> That's different. POV-Ray doesn't have a clue about how big the poly object may
> result (but I can be wrong here. Never used it before.)
Example was reffered to your definition of infinity: "It's an infinite surface
which makes an infinite object."
> it cannot exist an infinite object with a finite
> bounding box.
According to my definition of infinity (volume) it is true but according to your
definition (surface) it isn't. According to output of "Scene contains..." it is
probably ture but....
... is any not inversed not transformed box finite ? Then
plane{y 0 bounded_by{box{-(1e50) 1e50 }}}
:-)
ABX
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On Wed, 3 Apr 2002 01:37:38 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> Here's my new definition: a finite object is an object with a finite bounding box.
"But we're talking about POV-Ray's definition, aren't we?" ;-)
> Everything else is infinite. He he.
as I already said:
plane{y 0 bounded_by{box{-(1e50) 1e50 }}}
:-)
ABX
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> On Wed, 3 Apr 2002 01:28:49 +0200, "JRG" <jrg### [at] hotmailcom> wrote:
> > That's different. POV-Ray doesn't have a clue about how big the poly object may
> > result (but I can be wrong here. Never used it before.)
>
> Example was reffered to your definition of infinity: "It's an infinite surface
> which makes an infinite object."
Good point. See my new definition. :)
> > it cannot exist an infinite object with a finite
> > bounding box.
>
> According to my definition of infinity (volume) it is true but according to your
> definition (surface) it isn't. According to output of "Scene contains..." it is
> probably ture but....
>
> ... is any not inversed not transformed box finite ? Then
>
> plane{y 0 bounded_by{box{-(1e50) 1e50 }}}
Aw, come on. You know better than me that a box that big is considered infinite by
POV...
--
Jonathan.
Home: http://digilander.iol.it/jrgpov
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