Robert J Becraft wrote:

> The other problem is the rand function in POV is too regular.  If you create
> a set of random objects in a 50x50 area, and look at them from above, they
> come out looking like a 50x50 box with mostly evenly placed objects.  I'd
> like to have the objects truely randomly placed in the box such that some
> areas were denser than others, leaving clearings etc.

Try using the eval_pigment function in Megapov for this. Define a pigment and
then use the returned value to define the probability of apparition (or scale,
rotation etc.) of the object . You can even use an image_map for this if you
want very tight control.

G.

--

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http://www.oyonale.com
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Pov-ray gallery

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Few Notes about the Harry Potter Movie....

1) It is being filmed in the UK
2) Most if not all of the cast is either British or Dual Citizenship
3) It is Being Filmed at Warwick castle (i think i may be wrong on this one)
4) And they already have Pics from the movie so far.

Remco de Korte wrote:

> Tom Melly wrote:
> >
> > "Remco de Korte" <rem### [at] onwijscom> wrote in message
> > news:3A5F1150.2EB1FB59@onwijs.com...
> >
> > > I wonder: why can't this be an English (British?) movie? The UK does have
> > its
> > > own industry, but perhaps they lack the funds?
> > >
> >
> > Getting way OT here (weee!), but basically a) we're a bit crap and b) it
> > seems fair to assume that the best offer to Rowling came from the States.
>
> Sorry, got carried away a bit...
>
> Chances are a big part of the movie will be computer generated.
> Anyway, it's a great theme for POV-scenes as is shown by these two images (at
> the top of the thread).
>
> Remco

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Attachments:
Download 'harrypotter_lowres.jpg' (207 KB)

Preview of image 'harrypotter_lowres.jpg'

Psychomech wrote:
> 
> Few Notes about the Harry Potter Movie....
> 
> 1) It is being filmed in the UK
> 2) Most if not all of the cast is either British or Dual Citizenship
> 3) It is Being Filmed at Warwick castle (i think i may be wrong on this one)
> 4) And they already have Pics from the movie so far.
> 

Thanks for the update. I guess I should be reassured ;)

Nice owl, by the way. How did you model that? Isosurface?

Remco

Follow-up to off-topic... oops

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Robert J Becraft <cas### [at] aolcom> wrote:

> I actually developed these trees very early.  I downloaded an animation off
> of AOL that was a walk through a forest.  The trees for that were cones on
> cylinders... I made them multi-cones on cone trunks with clear spots in the
> texture.  I've played with this texture for 4 years now... still haven't
> gotten something I like.

> The other problem is the rand function in POV is too regular.  If you create
> a set of random objects in a 50x50 area, and look at them from above, they
> come out looking like a 50x50 box with mostly evenly placed objects.  I'd
> like to have the objects truely randomly placed in the box such that some
> areas were denser than others, leaving clearings etc.

Actually, that would be *less* random, in a strict sense, but more natural.

> Haven't found a way to do this yet.  This would also help when generating
> tree-parts or vines for buildings in that the clear spaces would be openings
> in the branches or exposed wall sections.

> If anyone has a way to get this to happen in POV I'd surely like to have it.

I've got one.  I use a image map as a density pattern.  When I choose a
point, it looks up the density and has to meet the threshold with an
additional random number.  In addition, that random number determines the
tree size, if it is successful.  When a tree is added, the density is
lessened, meaning that the trees group, but big trees stifle growth around
them.  Gives very nice 'copsing' behavior.

An example image can be found at
http://darwin.cwru.edu/wedig/public_html/wgraphics/Leaves.jpg

It uses Gilles Trans' tree macro, and a really awful HF, but other than
that, looks pretty nice.

The code is not ready for prime time, but if you want it, I'd be willing to
send a copy, or post it to sf.

Geoff

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Gives me an 404 - Not found ...?

Marc-Hendrik

Geoff Wedig schrieb in Nachricht <3a6449b0@news.povray.org>...
>An example image can be found at
>http://darwin.cwru.edu/wedig/public_html/wgraphics/Leaves.jpg

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Geoff Wedig wrote:

> > The other problem is the rand function in POV is too regular.  If you create
> > a set of random objects in a 50x50 area, and look at them from above, they
> > come out looking like a 50x50 box with mostly evenly placed objects.  I'd
> > like to have the objects truely randomly placed in the box such that some
> > areas were denser than others, leaving clearings etc.
>
> Actually, that would be *less* random, in a strict sense, but more natural.

It's a different type of "noise", white noise vs. pink noise vs. gaussian (etc
there's probably more). Maybe mathematicians consider some more "random", I don't
know enough to say for sure. But definitely, a fractaline gaussian noise would be
more natural for this scenario.

--
David Fontaine  <dav### [at] faricynet>  ICQ 55354965
My raytracing gallery:  http://davidf.faricy.net/

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There are lots of notes you can find online....

The official site is www.harrypotter.com

You can also find lots of stuff on Yahoo by searching for "Harry Potter".

Psychomech <psy### [at] homecom> wrote in message
news:3A6339EB.D9019B5B@home.com...
> Few Notes about the Harry Potter Movie....
>
> 1) It is being filmed in the UK
> 2) Most if not all of the cast is either British or Dual Citizenship
> 3) It is Being Filmed at Warwick castle (i think i may be wrong on this
one)
> 4) And they already have Pics from the movie so far.
>
> Remco de Korte wrote:
>
> > Tom Melly wrote:
> > >
> > > "Remco de Korte" <rem### [at] onwijscom> wrote in message
> > > news:3A5F1150.2EB1FB59@onwijs.com...
> > >
> > > > I wonder: why can't this be an English (British?) movie? The UK does
have
> > > its
> > > > own industry, but perhaps they lack the funds?
> > > >
> > >
> > > Getting way OT here (weee!), but basically a) we're a bit crap and b)
it
> > > seems fair to assume that the best offer to Rowling came from the
States.
> >
> > Sorry, got carried away a bit...
> >
> > Chances are a big part of the movie will be computer generated.
> > Anyway, it's a great theme for POV-scenes as is shown by these two
images (at
> > the top of the thread).
> >
> > Remco
>


----------------------------------------------------------------------------
----

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Don't know about Warwick Castle - it's possible that some of the filming may
be there but I do know that the main location for Hogwarts is Gloucester
Cathedral, which has caused some controversy amongst Christians because of
the witchcraft associations (although Gloucester locals including the Dean
and Chapter of the Cathedral don't seem to be so concerned).

For the record "First years are not allowed to use their own modelling
tools"

"Remco de Korte" <rem### [at] onwijscom> wrote in message
news:3A639943.D5E40F64@onwijs.com...
> Psychomech wrote:
> >
> > Few Notes about the Harry Potter Movie....
> >
> > 3) It is Being Filmed at Warwick castle (i think i may be wrong on this
one)

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Robert J Becraft wrote:
> 
> There are lots of notes you can find online....
> 
> The official site is www.harrypotter.com
> 
> You can also find lots of stuff on Yahoo by searching for "Harry Potter".
> 

Just wanted to mention that I saw a site yesterday with some trivia on the movie
and my scpeticism turned into mild enthusiasm when I looked at the cast. Seems
that John Cleese and Rik Mayall are playing (minor) parts. That should be fun. I
also like the choice of Robbie Coltrane. Too bad I'll have to wait until
november to see it.


Remco

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>
> Rowling is weird - they broadcast a reading of the first book on the radio
> over here on boxing day. The whole thing, unabridged, without breaks. It
was
> the only way she would let it happen.
>
>

I don't think this is weird - just different. Because of the conditions it
got great publicity and I think that it is fair to say that only the BBC
would agree to work in this way.

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