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Why does Pov call this an infinite object?
box{<500000,0.000001,100000><-50000,0.000001,1000>
Mick
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> Why does Pov call this an infinite object?
>
> box{<500000,0.000001,100000><-50000,0.000001,1000>
Perhaps because it's infinitely thin. Does it render?
-Mike
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Mike wrote:
>
> > Why does Pov call this an infinite object?
> >
> > box{<500000,0.000001,100000><-50000,0.000001,1000>
>
> Perhaps because it's infinitely thin. Does it render?
>
> -Mike
Of course it does or Pov would not report it as an infinite object.
box{<500000,0,100000><-50000,0,1000> is also valid.
I have wondered about this myself when I have recieved similar reports
from Pov and suspect it may be that beyond a certain distance it no longer
computes ray intersections for that object making it in effect infinite.
I may be wrong.
--
Ken Tyler - 1200+ Povray, Graphics, 3D Rendering, and Raytracing Links:
http://home.pacbell.net/tylereng/index.html http://www.povray.org/links/
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On Fri, 12 Nov 1999 18:21:34 -0000, "Mick Hazelgrove"
<mha### [at] minda swinternetcouk> wrote:
>Why does Pov call this an infinite object?
>
>box{<500000,0.000001,100000><-50000,0.000001,1000>
>
>Mick
You have the box "backwards" which might fool the bounding algorithm
into giving up bounding thus counting this box as infinite. Have you
tried switching the corner vectors?
Peter Popov
ICQ: 15002700
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On Fri, 12 Nov 1999 18:21:34 -0000, Mick Hazelgrove wrote:
>Why does Pov call this an infinite object?
>
>box{<500000,0.000001,100000><-50000,0.000001,1000>
POV considers an object "infinite" if its bounding box
is larger in volume than 2e10 cubic units. That's the
only test there is. The only thing I can guess is that
somehow the identical Y coords cause something to mark
it as unboundable, but I can't seem to find where this
happens.
--
These are my opinions. I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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Only needs to parse actually.
Ken <tyl### [at] pacbellnet> wrote in message
news:382C75B9.28CB626D@pacbell.net...
>
> > Perhaps because it's infinitely thin. Does it render?
> >
> > -Mike
>
> Of course it does or Pov would not report it as an infinite object.
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Ron Parker <ron### [at] povrayorg> wrote:
: POV considers an object "infinite" if its bounding box
: is larger in volume than 2e10 cubic units. That's the
: only test there is. The only thing I can guess is that
: somehow the identical Y coords cause something to mark
: it as unboundable, but I can't seem to find where this
: happens.
Is there any other consequence than that povray will not bound the object?
--
main(i,_){for(_?--i,main(i+2,"FhhQHFIJD|FQTITFN]zRFHhhTBFHhhTBFysdB"[i]
):5;i&&_>1;printf("%s",_-70?_&1?"[]":" ":(_=0,"\n")),_/=2);} /*- Warp -*/
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On 15 Nov 1999 07:09:25 -0500, Nieminen Juha wrote:
>Ron Parker <ron### [at] povrayorg> wrote:
>: POV considers an object "infinite" if its bounding box
>: is larger in volume than 2e10 cubic units. That's the
>: only test there is. The only thing I can guess is that
>: somehow the identical Y coords cause something to mark
>: it as unboundable, but I can't seem to find where this
>: happens.
>
> Is there any other consequence than that povray will not bound the object?
None that I can find. Obviously infinite objects don't show up in the vista
or light buffers, either, but that's a result of having no bounding.
Interestingly enough, I got an email that changing the Y coordinates does
not make a difference. I'm obviously missing something.
--
These are my opinions. I do NOT speak for the POV-Team.
The superpatch: http://www2.fwi.com/~parkerr/superpatch/
My other stuff: http://www2.fwi.com/~parkerr/traces.html
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The email was from me and I was wrong! See my post p.a-u. The y value is
however quite critical if it is too little povray still sees the box as an
infinite object. If it is too much then strange problems with transparency
and texture appear.
Mick
Ron Parker <ron### [at] povrayorg> wrote in message
news:slr### [at] rongwmicrocom...
> On 15 Nov 1999 07:09:25 -0500, Nieminen Juha wrote:
> >Ron Parker <ron### [at] povrayorg> wrote:
> >: POV considers an object "infinite" if its bounding box
> >: is larger in volume than 2e10 cubic units. That's the
> >: only test there is. The only thing I can guess is that
> >: somehow the identical Y coords cause something to mark
> >: it as unboundable, but I can't seem to find where this
> >: happens.
> >
> > Is there any other consequence than that povray will not bound the
object?
>
> None that I can find. Obviously infinite objects don't show up in the
vista
> or light buffers, either, but that's a result of having no bounding.
>
> Interestingly enough, I got an email that changing the Y coordinates does
> not make a difference. I'm obviously missing something.
>
> --
> These are my opinions. I do NOT speak for the POV-Team.
> The superpatch: http://www2.fwi.com/~parkerr/superpatch/
> My other stuff: http://www2.fwi.com/~parkerr/traces.html
>
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