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11 Aug 2024 11:24:53 EDT (-0400)
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From: Matt
Subject: Luminous plasma ideas sought!
Date: 3 Aug 1999 20:29:48
Message: <37A78A77.F71377C0@spherica.demon.co.uk>
I want to create a glowing multilayered torus of plasma to play with.
Can anyone suggest how  to get started with such light emitting foggy
things please?

Many thanks in advance

Matt Moose.
N Wales


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From: Bob Hughes
Subject: Re: Luminous plasma ideas sought!
Date: 4 Aug 1999 04:14:57
Message: <37a7f681@news.povray.org>
"light emitting foggy things"? Not in POV-Ray sir, sorry to say.
However, if you meant simulated (isn't everything?) then the answer
might be multiple medias or rather multiple torii with a 'media' in each
along with a 'light_source'. Some such thing. Check out the demo scenes
under Scenes\Interior\Media for some examples. Mapping to a torus try
using the 'ripples' pattern in the 'density' statement using a
'density_map' or 'color_map'.
I don't think radiosity is going to work on the media so no glow via
that.

//following is the Hollow3.pov modified for this purpose:

global_settings {
number_of_waves 0  //removes the multiple wave pattern interferences
 }

#include "colors.inc"

camera {
  location <-1.5, 30, -150>
  look_at <0, 25, 35>
  angle 35
}

background { color rgb<0.2, 0.4, 0.8> }

light_source { <0, 0, 0> color rgb <1.5,1.25,.25> } //light at center of
torus (no good really)

plane { y, -2
   pigment { rgb <.7,.8,.9> }
   normal {granite .025 scale .025}
   finish {ambient .3 diffuse 1 reflection 0.15}
   hollow
}

//sphere { 0, 1
//cylinder {-y,y,1
torus {.667,.333
  pigment {
    //checker YellowGreen, rgbt<1, 1, 1, 0.7>
    rgbf 1
    scale <0.4, 0.5, 0.2>
    rotate <90, 0, -90>
  }
  finish {
    brilliance 8
    phong 1
    phong_size 100
  }
  interior {
    media {
      emission 0.05
      intervals 10
      samples 1, 1
      confidence 0.999
      variance 1/100
      density {
        ripples //waves //spherical
        ramp_wave
        frequency 1//3
        turbulence 0//1
        color_map {
          [0.0 color rgb <0, 0, 0>]
          [0.1 color rgb <1, 0, 0>]
          [1.0 color rgb <1, 1, 0>]
        }  scale .5 translate .25 //reposition to fit torus
      }
    }
  }
  scale 25 rotate -45*x
  translate 25*y 
  hollow
} 

// END


Bob


Matt wrote:
> 
> I want to create a glowing multilayered torus of plasma to play with.
> Can anyone suggest how  to get started with such light emitting foggy
> things please?
> 
> Many thanks in advance
> 
> Matt Moose.
> N Wales

-- 
 omniVERSE: beyond the universe
  http://members.aol.com/inversez/homepage.htm
 mailto://inversez@aol.com?Subject=PoV-News


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From: Matt Giwer
Subject: Re: Luminous plasma ideas sought!
Date: 10 Aug 1999 07:59:38
Message: <37B01438.4138700C@giwersworld.org>
Matt wrote:

> I want to create a glowing multilayered torus of plasma to play with.
> Can anyone suggest how  to get started with such light emitting foggy
> things please?

	I don't remember where I saw it but it was a light sabre that
sounds like what you are seeking. You might try the images group.
There should be more than one around since the movie came out. 

-- 
<blink>-------please--don't-----------------</blink>

http://www.giwersworld.org/artii/
http://www.giwersworld.org/artiii/

Finally up on 99/06/22 updated 07/13


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From: Bill DeWitt
Subject: Re: Luminous plasma ideas sought!
Date: 12 Aug 1999 15:43:43
Message: <37b323ef@news.povray.org>
Matt Giwer <mgi### [at] giwersworldorg> wrote in message
news:37B01438.4138700C@giwersworld.org...
> Matt wrote:
>
> > I want to create a glowing multilayered torus of plasma to play with.
> > Can anyone suggest how  to get started with such light emitting foggy
> > things please?
>

In my continuing attempts to make an Aurora, I have been working with this
(below) but I have yet to make a multi-layered one. Nor am I able to get an
outward curving slice of this one...

//////////////////////
#macro Funct1(Increment)
       sin((Increment)*(pi))
  #end
//////////////////////

sphere{ 0,2
                hollow
                pigment { rgbt 1 }

erior{ 
                          
    media {
                samples 10, 30 
                emission  rgb < 0.0, 0.0, 2.0 > 
         
     density { cylindrical//atmosphere
               color_map{
               
                         #declare I = 0;
                         #while ( I < 1 )
                           [I rgb Funct1(I) ]
                         #declare I = I + 0.2;
                         #end 
                        
                        }
                        scale 2    

              } // end den 
        
 
               
     density { gradient y file://atmosphere 
               color_map{
               
                         [ 0.0 rgb 1 ]
                         [ 1.0 rgb 0 ] 
                        
                        }
                      
                        scale     < 1.0, 2.0, 1.0 > 
                                   
               } // end den                
              } file://end media     
             } file://end sphere
                scale     < 1.0, 0.333, 1.0 >
            } file://end object SkySphere01


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From: Matt
Subject: Re: Luminous plasma ideas sought!
Date: 16 Aug 1999 19:44:30
Message: <37B8A379.3EBCDCD8@spherica.demon.co.uk>
Your ideas so far are appreciated
I love this raytracing community thing


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