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19 Aug 2024 02:20:58 EDT (-0400)
  WIP: Fountain (Message 4 to 13 of 13)  
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From: Stephen Bell
Subject: Re: Fountain
Date: 4 Mar 2001 02:51:09
Message: <3aa1f3ed$1@news.povray.org>
Not bad...  The ripples in your water should be coming from where the water
lands, not where it comes out.  The clouds are pretty weird.  I really like
your unusual sculptures in the fountain.

"Duncan Adamson" <dja### [at] docicacuk> wrote in message
news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> A first attempt at a fountain for a garden scene.
>
> Comments please.
>


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


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From: Dan Johnson
Subject: Re: WIP: Fountain
Date: 6 Mar 2001 05:51:19
Message: <3AA4C2BC.BF63D4C@hotmail.com>
Duncan Adamson wrote:

> A first attempt at a fountain for a garden scene.
>
> Comments please.
>
>   ------------------------------------------------------------------------
>  [Image]

The dodecahedrons don't seem to be rotated quite like I would expect.  The top
face's are not parallel to the grass, and they don't have a consistent side to
the center of the pool.  When I was making a space frame out of many polyhedra
I discovered placing them accurately takes some effort (mental note pre define
some rotations in my polyhedra include file).

Oops got side tracked, and figured it out instead of sending message.  Well
the rotation depends on what code you are using to create the dodecahedron.
If you are using my include file I already have it figured out.


--
Dan Johnson

http://www.geocities.com/zapob


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From: Duncan Adamson
Subject: Re: WIP: Fountain
Date: 6 Mar 2001 06:56:16
Message: <3AA4D060.F77A938@doc.ic.ac.uk>
Good plan, at present they are simply randomlly rotated (I didn't know what to do
with them.  Will look at your macro to work out the maths.

Thanks for the comment.  Will update latest version soon.

>
> The dodecahedrons don't seem to be rotated quite like I would expect.  The top
> face's are not parallel to the grass, and they don't have a consistent side to
> the center of the pool.


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From: Dan Johnson
Subject: Re: WIP: Fountain
Date: 6 Mar 2001 08:48:50
Message: <3AA4EC4F.A2AE6FFD@hotmail.com>
Duncan Adamson wrote:

> Good plan, at present they are simply randomlly rotated (I didn't know what to do
> with them.  Will look at your macro to work out the maths.

Are you using my macro?

>
> Thanks for the comment.  Will update latest version soon.

As I said "If you are using my include file I already have it figured out.", but my
include file isn't that much help at figuring it out.  Since I have it figured out
already I might as well post it.

// source of scene rendered below
#include "colors.inc"
#include "polyhedra.inc"
#include "finish.inc"

#declare Dodecahedron_dihedral = Angle_between_vectors(<-Golden,1,0>,<Golden,1,0>)
#declare RotateToFace = ((180 - Dodecahedron_dihedral)/2);
#declare Inscribe_radius = vlength
((DodecahedronFaceLength*Icosahedron1)-(Golden*x));
#declare Dodecahedron_On_Face = object {Dodecahedron_faces rotate RotateToFace*z
translate DodecahedronFaceLength*y}
#declare Spout = cylinder {0,vnormalize(Icosahedron9)*3,.3 rotate RotateToFace*z
translate DodecahedronFaceLength*y texture{pigment {Blue} finish {Dull}}}
#declare Pedestal = union {
        union{
                object{Dodecahedron_On_Face translate 4*y}
                cylinder{0,<0,4,0>,Inscribe_radius}
                pigment {Red} finish{Dull}}
        object {Spout translate 4*y}}
union {
        object {Pedestal translate 6*x}
        object {Pedestal translate 6*x rotate 120*y}
        object {Pedestal translate 6*x rotate -120*y}
        }
plane {y,0 pigment{Green} finish {Dull}}
light_source{<12,20,-30> rgb 2}
camera {location <2,11,-15> look_at 0}

//#fopen Calc "c:\data\data.txt" write
//#write (Calc, "RotateToFace = ",RotateToFace,"\n","DodecahedronFaceLength =
",DodecahedronFaceLength)
//#fclose Calc

//  Contents of data.txt created with this file
/*
RotateToFace = 31.7175
DodecahedronFaceLength = 1.37638
*/



--
Dan Johnson

http://www.geocities.com/zapob


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From: The "D"
Subject: Re: Fountain
Date: 7 Mar 2001 01:01:42
Message: <3aa5cec6@news.povray.org>
Duncan Adamson <dja### [at] docicacuk> wrote in message
news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> A first attempt at a fountain for a garden scene.

Spiffy. How are you bounding the water?



--
-The "D"
    A Thunderstorm is God's way of telling you that you spend too much time
on the
computer
Email address given is a spam catcher only


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From: Duncan Adamson
Subject: Re: Fountain
Date: 7 Mar 2001 05:04:41
Message: <3AA607B9.9175027F@doc.ic.ac.uk>
The \"D\" wrote:

> Duncan Adamson <dja### [at] docicacuk> wrote in message
> news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> > A first attempt at a fountain for a garden scene.
>
> Spiffy. How are you bounding the water?

Water is
                    blue plane at y=-5
                    intersection{
                        a glass plane at y=-0.2
                        a prism in the shape of the inside of the fountain
                    }
Quite nice and simple


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From: Richard Dault
Subject: Re: Fountain
Date: 7 Mar 2001 13:14:50
Message: <3aa67a9a@news.povray.org>
It appears that your flowing water is composed of spheres.  Try switching it
to blobs.

"Duncan Adamson" <dja### [at] docicacuk> wrote in message
news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> A first attempt at a fountain for a garden scene.
>
> Comments please.
>


Post a reply to this message

From: The "D"
Subject: Re: Fountain
Date: 7 Mar 2001 17:01:06
Message: <3aa6afa2@news.povray.org>
Duncan Adamson <dja### [at] docicacuk> wrote in message
news:3AA607B9.9175027F@doc.ic.ac.uk...
> The \"D\" wrote:
>
> > Duncan Adamson <dja### [at] docicacuk> wrote in message
> > news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> > > A first attempt at a fountain for a garden scene.
> >
> > Spiffy. How are you bounding the water?
>
> Water is
>                     blue plane at y=-5
>                     intersection{
>                         a glass plane at y=-0.2
>                         a prism in the shape of the inside of the fountain
>                     }
> Quite nice and simple

Indeed. hmmm.... Do you think a similar technique will let me bound water in
a bicubic patch fountain I made in spatch?

--
-The "D"
    A Thunderstorm is God's way of telling you that you spend too much time
on the
computer
Email address given is a spam catcher only


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From: Duncan Adamson
Subject: Re: Fountain
Date: 12 Mar 2001 05:09:56
Message: <3AACA073.9549050C@doc.ic.ac.uk>
The \"D\" wrote:

> Duncan Adamson <dja### [at] docicacuk> wrote in message
> news:3AA607B9.9175027F@doc.ic.ac.uk...
> > The \"D\" wrote:
> >
> > > Duncan Adamson <dja### [at] docicacuk> wrote in message
> > > news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> > > > A first attempt at a fountain for a garden scene.
> > >
> > > Spiffy. How are you bounding the water?
> >
> > Water is
> >                     blue plane at y=-5
> >                     intersection{
> >                         a glass plane at y=-0.2
> >                         a prism in the shape of the inside of the fountain
> >                     }
> > Quite nice and simple
>
> Indeed. hmmm.... Do you think a similar technique will let me bound water in
> a bicubic patch fountain I made in spatch?
>
> --
> -The "D"
>     A Thunderstorm is God's way of telling you that you spend too much time
> on the
> computer
> Email address given is a spam catcher only

I have been playing with this all week but I don't know a lot about bicubic
patches.  However, so long as there are no problems with bicubic patches and
CSG there should be no problem.  Of course, you will need to know the shape of
the space your fountain is fitting into but hey, you designed it.

Let me know if you have any success - This could be useful for some ideas of my
own.

Duncan


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From: The "D"
Subject: Re: Fountain
Date: 13 Mar 2001 14:16:12
Message: <3aae71fc$1@news.povray.org>
Duncan Adamson <dja### [at] docicacuk> wrote in message
news:3AACA073.9549050C@doc.ic.ac.uk...
> The \"D\" wrote:
>
> > Duncan Adamson <dja### [at] docicacuk> wrote in message
> > news:3AA607B9.9175027F@doc.ic.ac.uk...
> > > The \"D\" wrote:
> > >
> > > > Duncan Adamson <dja### [at] docicacuk> wrote in message
> > > > news:3A9F811A.1BF5AD94@doc.ic.ac.uk...
> > > > > A first attempt at a fountain for a garden scene.
> > > >
> > > > Spiffy. How are you bounding the water?
> > >
> > > Water is
> > >                     blue plane at y=-5
> > >                     intersection{
> > >                         a glass plane at y=-0.2
> > >                         a prism in the shape of the inside of the
fountain
> > >                     }
> > > Quite nice and simple
> >
> > Indeed. hmmm.... Do you think a similar technique will let me bound
water in
> > a bicubic patch fountain I made in spatch?
> >
> > --
> > -The "D"
> >     A Thunderstorm is God's way of telling you that you spend too much
time
> > on the
> > computer
> > Email address given is a spam catcher only
>
> I have been playing with this all week but I don't know a lot about
bicubic
> patches.  However, so long as there are no problems with bicubic patches
and
> CSG there should be no problem.  Of course, you will need to know the
shape of
> the space your fountain is fitting into but hey, you designed it.
>
> Let me know if you have any success - This could be useful for some ideas
of my
> own.

Well it was an attempt to to make a bowel in sptach (before I started
messing with lathes in povray) so it's circular with a flat bottom and as it
turns out a cone like thing in the middle. I could probably re-do it as a
union of lathes but doing csg on bicubit patches shouldn't be a problem
since most spatch models are actually unions of several bi-cubic patches.



--
-The "D"
    A Thunderstorm is God's way of telling you that you spend too much time
on the
computer
Email address given is a spam catcher only


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