POV-Ray : Newsgroups : povray.unofficial.patches : UberPOV is back : Re: UberPOV is back Server Time
26 Nov 2022 14:06:43 EST (-0500)
  Re: UberPOV is back  
From: William F Pokorny
Date: 27 Aug 2016 15:13:51
Message: <57c1e66f$1@news.povray.org>
On 08/26/2016 09:26 AM, clipka wrote:
> Am 26.08.2016 um 13:45 schrieb William F Pokorny:
>
> Speaking of density files -- since you've been dealing with those
> recently, how would you feel about implementing a 3-channel RGB variant?
> Something akin to `image_map` but in 3D? I have a hunch that some people
> might like to have such a thing, but I currently don't find the time myself.
>

I'll put it on my todo list & certainly think about it.

I reviewed in dome detail what folks have been doing with df3s lately 
and submitted a pull request #81 to enable pigment_map use in the 
density block.

This will let folks do the image stacking method inside povray with 
something like:

#declare PigmR  = pigment {
   image_map { "Red.png"    map_type 0 interpolate 2 } }
#declare PigmY  = pigment {
   image_map { "Yellow.png" map_type 0 interpolate 2 } }
#declare PigmG  = pigment {
   image_map { "Green.png"  map_type 0 interpolate 2 } }
#declare PigmC  = pigment {
   image_map { "Cyan.png"   map_type 0 interpolate 2 } }
#declare PigmB  = pigment {
   image_map { "Blue.png"   map_type 0 interpolate 2 } }

#declare Object00 = object {
     box { <0.45,0.45,0.00>,<0.55,0.55,1.00> }
     texture { pigment { rgbt 1 } }
     hollow on
     interior {
         media {
           emission 3.00
           samples 30
           density {
             gradient z
             pigment_map {
               [ 0.0  PigmR ]
               [ 0.25 PigmY ]
               [ 0.5  PigmG ]
               [ 0.75 PigmC ]
               [ 1.0  PigmB ]
             }
           }
         }
     }
}

I don't see any reason not to allow it & it works in my testing, but I'm 
also a bit surprised it was not already enabled in the code?

Bill P.


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