The group povray.programming is for discussing the source code of 
POV-Ray, not the scene description language.  Follow-ups to
povray.newusers please.

     Thorsten

In article <3aa9b3cc@news.povray.org> , "John M. Dlugosz"
<joh### [at] dlugoszcom> wrote:

> Could someone with immediate knowledge of this feature help me out and tell
> me the equivilent statement in the current POV version?
>
> See http://www.dlugosz.com/Artwork/POV/lamp1.JPG for the picture: this is
> your basic glowing effect.
>
> TIA,
> --John
>
> light_source {
>     <0,0,0>
>     color White
>     looks_like {
>         sphere { 0, 1
>             pigment { color rgbt <1, 1, 1, 1> }
>             halo {
>                 emitting
>                 spherical_mapping
>                 linear
>                 color_map {
>                     [ 0.0 color rgbt <1, 1, 0, .999999> ]
>                     [ 0.5 color rgbt <1, 1, 0, 0.5> ]
>                     [ 0.8 color rgbt <1, 1, 1, 0> ]
>                     [ 1.0 color rgbt <1, 1, 1, 0> ]
>                     }
>                 samples 10
>                 }
>             hollow
>             scale <3,1.5,1.5>
>             } //end sphere
>         } // end looks_like
>     translate y*9.7
>     }
>
>



____________________________________________________
Thorsten Froehlich
e-mail: mac### [at] povrayorg

I am a member of the POV-Ray Team.
Visit POV-Ray on the web: http://mac.povray.org

Post a reply to this message

> In article <3aa9b3cc@news.povray.org> , "John M. Dlugosz"
> <joh### [at] dlugoszcom> wrote:
>
> > Could someone with immediate knowledge of this feature help me out and
tell
> > me the equivilent statement in the current POV version?
> >
> > See http://www.dlugosz.com/Artwork/POV/lamp1.JPG for the picture: this
is
> > your basic glowing effect.
> >
> > light_source {
> >     <0,0,0>
> >     color White
> >     looks_like {
> >         sphere { 0, 1
> >             pigment { color rgbt <1, 1, 1, 1> }
> >             halo {
> >                 emitting
> >                 spherical_mapping
> >                 linear
> >                 color_map {
> >                     [ 0.0 color rgbt <1, 1, 0, .999999> ]
> >                     [ 0.5 color rgbt <1, 1, 0, 0.5> ]
> >                     [ 0.8 color rgbt <1, 1, 1, 0> ]
> >                     [ 1.0 color rgbt <1, 1, 1, 0> ]
> >                     }
> >                 samples 10
> >                 }
> >             hollow
> >             scale <3,1.5,1.5>
> >             } //end sphere
> >         } // end looks_like
> >     translate y*9.7
> >     }

This might be about right:

#declare D=.75;

sphere {0,1
        pigment {rgbt 1}
interior {
    media {
        intervals 6
        samples 30,30 // method 2 // use less intervals and samples in
MegaPOV
        emission <1,1,0>
            density {
                spherical
        density_map {
            [0 rgb<1,1,0>*0*D]
            [.5 rgb<1,1,0>*.5*D]
            [.8 rgb<1,1,1>*D]
            [1 rgb<1,1,1>*D]
        } }
} }
  scale <3,1.5,1.5>
 hollow
}

MegaPOV allows for much faster renders with method 2 used in the media
statement while also keeping it smoother with less samples (and intervals).
However unequal min and max samples is usually grainy.

Bob H.

Post a reply to this message

Thanks for the quick fix.  I suppose I can play with the map to get the
gradiation just right... but, puzzle me this:

1) textures look different, such as the floor.
2) the light is backwards!  In the new image, there is a bright stripe from
lower-left to mid-right along the floor, when in the original it's a dark
shadow.  Huh??

See the render at http://green.dlugosz.com/files/lamp1.3.jpg and you can
find the source file at lamp1.3.pov in the same path.

I used MegaPOV 0.4a and did enable it in the source.  I get the same result
if I comment out the "version unofficial".

TIA,
--John

"Bob H." <omn### [at] msncom> wrote in message
news:3aa9c74d@news.povray.org...
> > In article <3aa9b3cc@news.povray.org> , "John M. Dlugosz"
> > <joh### [at] dlugoszcom> wrote:
> >
> > > Could someone with immediate knowledge of this feature help me out and
> tell
> > > me the equivilent statement in the current POV version?
> > >
> > > See http://www.dlugosz.com/Artwork/POV/lamp1.JPG for the picture: this
> is
> > > your basic glowing effect.
> > >
> > > light_source {
> > >     <0,0,0>
> > >     color White
> > >     looks_like {
> > >         sphere { 0, 1
> > >             pigment { color rgbt <1, 1, 1, 1> }
> > >             halo {
> > >                 emitting
> > >                 spherical_mapping
> > >                 linear
> > >                 color_map {
> > >                     [ 0.0 color rgbt <1, 1, 0, .999999> ]
> > >                     [ 0.5 color rgbt <1, 1, 0, 0.5> ]
> > >                     [ 0.8 color rgbt <1, 1, 1, 0> ]
> > >                     [ 1.0 color rgbt <1, 1, 1, 0> ]
> > >                     }
> > >                 samples 10
> > >                 }
> > >             hollow
> > >             scale <3,1.5,1.5>
> > >             } file://end sphere
> > >         } // end looks_like
> > >     translate y*9.7
> > >     }
>
> This might be about right:
>
> #declare D=.75;
>
> sphere {0,1
>         pigment {rgbt 1}
> interior {
>     media {
>         intervals 6
>         samples 30,30 // method 2 // use less intervals and samples in
> MegaPOV
>         emission <1,1,0>
>             density {
>                 spherical
>         density_map {
>             [0 rgb<1,1,0>*0*D]
>             [.5 rgb<1,1,0>*.5*D]
>             [.8 rgb<1,1,1>*D]
>             [1 rgb<1,1,1>*D]
>         } }
> } }
>   scale <3,1.5,1.5>
>  hollow
> }
>
> MegaPOV allows for much faster renders with method 2 used in the media
> statement while also keeping it smoother with less samples (and
intervals).
> However unequal min and max samples is usually grainy.
>
> Bob H.
>
>
>

Post a reply to this message