hey thats cool!

I'm still amazed at the thing people can make this program do.
Gary

Bob H. <omn### [at] msncom> wrote in message
news:3ba84ced@news.povray.org...
> /*
>  Here's a quick try at it.  If you use a cone instead of the box the thin
> edges won't look right, I can tell you that without even having tried it
in
> this.  At least not without first narrowing its thickness.  In fact this
one
> doesn't look very spectrum like when oriented away from the camera.
>  This should be okay for POV-Ray 3.1
>  You'll need to work out the layout from what's in the comments and object
> transformations in order to use it in other ways of your own.
> */
>
> // example of faked light spectrum from a prism
>
> #declare Scale=5; // overall size
> #declare Illum=2; // brightness
>
> // prism paired with spectrum
> union {
>
> // prism
> intersection {
>         plane {x,.1}
>         plane {x,.1 rotate 120*y}
>         plane {x,.1 rotate 240*y}
>         plane {-y,0}
>         plane {+y,1}
>  pigment {rgbf <0.8,1,0.9,1>}
>  interior {ior 1.5}
>    rotate -45*y scale <0.75,1,0.5> translate <-0.025,0,-0.025>
> }
>
> // media spectrum
> box {0,1 hollow
>         pigment {rgbt 1}
>         interior {
>                 media {
>                         emission 1
>                        density { radial frequency 4
>                          density_map {
>                                 [0 rgb <0,0,0>]
>                                 [0.1 rgb <1,0,0>*Illum/Scale]
>                                 [0.3 rgb <1,0.5,0>*Illum/Scale]
>                                 [0.4 rgb <1,1,0>*Illum/Scale]
>                                 [0.7 rgb <0,1,0>*Illum/Scale]
>                                 [0.85 rgb <0,1,1>*Illum/Scale]
>                                 [0.9 rgb <0,0,1>*Illum/Scale]
>                                 [1 rgb <0,0,0>]
>                          }
>                         }
>                 }
>                 media {
>                         absorption 1
>                        density { radial frequency 4
>                          density_map {
>                                 [0 rgb <0,0,0>] // adjust colors to liking
>                                 [0.1 rgb <1,0,0>*Illum/Scale]
>                                 [0.3 rgb <1,0.5,0>*Illum/Scale]
>                                 [0.4 rgb <1,1,0>*Illum/Scale]
>                                 [0.7 rgb <0,1,0>*Illum/Scale]
>                                 [0.85 rgb <0,1,1>*Illum/Scale]
>                                 [0.9 rgb <0,0,1>*Illum/Scale]
>                                 [1 rgb <0,0,0>]
>                          }
>                         }
>                 }
>         }
> }
>  rotate 45*y scale <2,1,1>*Scale
>
>   rotate -42*x // -45 to align with camera as is (perpendicular)
> }
> // end spectrum
>
> light_source {
>         0,0.5
> }
>
> camera {
>         location <0,0,-10>
>         look_at <2,0.5,0.5>
>         angle 30
>         rotate 42*x // +45 to be opposite the wedges upper face when as
> above
> }
>
> // room
> box {-15,15
>         pigment {rgb 0.9}
>         finish {ambient 0.1}
>  inverse
> }
>
>
>

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