hey guys
I am a novice in Ray tracing.I would like to know if it is possible
,let's say ,to connect two points by one segment, just one segment (not
a torus or ...),and this without being obliged to work in  2D

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In article <36B61CB4.435B38DC@yahoo.com>, kane <kan### [at] yahoocom> wrote:

> hey guys
> I am a novice in Ray tracing.I would like to know if it is possible
> ,let's say ,to connect two points by one segment, just one segment (not
> a torus or ...),and this without being obliged to work in  2D

Perhaps I'm not understanding the question...

you can create a cylinder with start and end points anywhere in 3D
space...so there is no obligation to work in 2D.

Now, if by segment you mean a line according to Euclidian Geometry, i.e.,
a line that has length but no depth or width, then you're in trouble.
Cylinders have to have a radius of some positive number, so you can start
will 0.01 and adjust it to make it as small as possible and still visible,
but you can't make a 1 pixel wide line like you can in most drawing
programs or paint programs.

SInce POV-Ray is a three dimensional modeller the building blocks are
spheres, cubes, cones, cylinders, and torii. There are "flat" objects such
as planes, discs, meshes, triangles, and patches, but even most of these
get assigned an "inside" and "outside" in POV-Ray

Please let me know if this helps or if I am completely off the mark...
-- 
Josh English
eng### [at] spiritonecom
www.spiritone.com/~english

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Hey  J osh
actually I have tried the cylinder stuff  but it gives me  what you can see
in the attachement
i mean some cuts appears on  the cylinder  when it  'moves' as i  don t know
how to avoid having them i was thinking that  a line would be the solution .
anyway thanks

Josh English wrote:

> In article <36B61CB4.435B38DC@yahoo.com>, kane <kan### [at] yahoocom> wrote:
>
> > hey guys
> > I am a novice in Ray tracing.I would like to know if it is possible
> > ,let's say ,to connect two points by one segment, just one segment (not
> > a torus or ...),and this without being obliged to work in  2D
>
> Perhaps I'm not understanding the question...
>
> you can create a cylinder with start and end points anywhere in 3D
> space...so there is no obligation to work in 2D.
>
> Now, if by segment you mean a line according to Euclidian Geometry, i.e.,
> a line that has length but no depth or width, then you're in trouble.
> Cylinders have to have a radius of some positive number, so you can start
> will 0.01 and adjust it to make it as small as possible and still visible,
> but you can't make a 1 pixel wide line like you can in most drawing
> programs or paint programs.
>
> SInce POV-Ray is a three dimensional modeller the building blocks are
> spheres, cubes, cones, cylinders, and torii. There are "flat" objects such
> as planes, discs, meshes, triangles, and patches, but even most of these
> get assigned an "inside" and "outside" in POV-Ray
>
> Please let me know if this helps or if I am completely off the mark...
> --
> Josh English
> eng### [at] spiritonecom
> www.spiritone.com/~english

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Attachments:
Download 'sauve006.bmp.dat' (188 KB)

Sorry, I WON'T download a .bmp image in a newsgroup only ment for TEXT.
If you convert it to JPEG or PNG, then upload again to .binaries.images,
then I will be happy to help you, but I pay by the second, so a .BMP
download is NOT what I intend to spend my evening with.

//Spider

kane wrote:
> 
> hey guys
> I am a novice in Ray tracing.I would like to know if it is possible
> ,let's say ,to connect two points by one segment, just one segment (not
> a torus or ...),and this without being obliged to work in  2D

Post a reply to this message

Kane,

Define a 'segment', I'm drawing (/rendering) a blank on this one.

	Graham.

kane wrote:
> 
> hey guys
> I am a novice in Ray tracing.I would like to know if it is possible
> ,let's say ,to connect two points by one segment, just one segment (not
> a torus or ...),and this without being obliged to work in  2D

Post a reply to this message

Ken got it right in the images section.  Your problem is a lack of
anti-aliasing.  You should be able to clear up your problem by using
some.  If you are using the windows version, it is as simple as changing
your render settings (up in the top left corner) in Dos or another
command line environment you need to add the command line switches that
Bob suggested.  There aren't any REAL cuts in the cylinders, they are
just what are called display artifacts (it is a display with discrete
elements (pixels), therefor a true analog image is hard to produce
without added calculations (ie AntiAliasing) even then, it isn't
perfect)

Steve


kane wrote:
> 
> hey guys
> I am a novice in Ray tracing.I would like to know if it is possible
> ,let's say ,to connect two points by one segment, just one segment (not
> a torus or ...),and this without being obliged to work in  2D

Post a reply to this message

kane <kan### [at] yahoocom> wrote:
: actually I have tried the cylinder stuff  but it gives me  what you can see
: in the attachement

  This is not a binary group! Please confine all binary attachment to the
binary groups.
  This may not seem relevant to you, but I assure it is for many people.

-- 
main(i){char*_="BdsyFBThhHFBThhHFRz]NFTITQF|DJIFHQhhF";while(i=
*_++)for(;i>1;printf("%s",i-70?i&1?"[]":" ":(i=0,"\n")),i/=2);} /*- Warp. -*/

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Like I've posted elsewhere... a 'segment' according to geometry has a length,
but no width or height. This cannot be created in POV-Ray, since everything
is in 3d in some way. I assume that this is what he is referring to, but
that's an opinion of an ex- high school math tutor.



Graham Redway wrote:

> Kane,
>
> Define a 'segment', I'm drawing (/rendering) a blank on this one.
>
>         Graham.
>
> kane wrote:
> >
> > hey guys
> > I am a novice in Ray tracing.I would like to know if it is possible
> > ,let's say ,to connect two points by one segment, just one segment (not
> > a torus or ...),and this without being obliged to work in  2D

--
Josh English
eng### [at] spiritonecom
www.spiritone.com/~english

Post a reply to this message

>  This is not a binary group! Please confine all binary
attachment to the
>  binary groups.
>  This may not seem relevant to you, but I assure it is for
many people.


And, of course, it's not a good idea to attach bmp's for
things like this. Consider using jpg instead, it compresses
the file a lot.

Julius

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One can also delete such a post (the author can delete his own posts)
and therefore avoid users who have not yet read the offending material
to be spared the unnecessary download time.

Please also note that posting twice the exact same graphic serves no
usefull purpose. When refering to the same material, please quote a
reference to the appropriate message.

Since not everybody will be reading a binaries group, the usage is to
do the binary posting in a binary group, then post a simple message
whereever you wish pointing out the binary posting in question.

Cheers,
Al.



Julius Klatte wrote:

> >  This is not a binary group! Please confine all binary
> attachment to the
> >  binary groups.
> >  This may not seem relevant to you, but I assure it is for
> many people.
>
> And, of course, it's not a good idea to attach bmp's for
> things like this. Consider using jpg instead, it compresses
> the file a lot.
>
> Julius

--
ANTI SPAM / ANTI ARROSAGE COMMERCIAL :

To answer me, please take out the Z from my address.

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