On Thu, 15 Apr 1999 17:52:06 +0300, Lewis <ble### [at] netvisionnetil>
wrote:

>I handed in the lab report today, but I would like to know how to
>specify a spectrum for the light source (in UVPOV)

Here is a quote from a recent post by Nathan Kopp:

> I have implemented dispersion, but there's no default spectrum.  If you
> creat your light source like this:
> 
> light_source
>   <10,10,10>
>   color <1,1,1> // this will be replaced, but the parser is a hack right
>                 //   now, so it is still required
>   color_map{    // here you define your light's spectrum
>                 //   this color_map acts like "average":  the first value is
>                 //   weight (intensity), the second is color
>     [1, <.5,0,0>]
>     [1, <.2,.2,0>]
>     [1, <.3,.3,0>]
>     [1, <0,.5,.5>]
>     [1, <0,0,.5>]
>   }
> }
> 
> Notice, the color map entries added up to <1,1,1>.  This spectrum will
> probably look bad (I made it up just now), but you get the idea.

Jerry Anning
clem "at" dhol "dot" com

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