POV-Ray : Newsgroups : povray.text.scene-files : L*C*h(uv) functions : Re: L*C*h(uv) functions Server Time
19 May 2024 04:19:23 EDT (-0400)
  Re: L*C*h(uv) functions  
From: Mike Horvath
Date: 21 Nov 2016 15:10:06
Message: <5833549e$1@news.povray.org>
On 11/21/2016 3:02 PM, Bald Eagle wrote:
> Mike Horvath <mik### [at] gmailcom> wrote:
>> Here are the L*C*h(uv) functions I created. How do I turn them into
>> pigments?
>>
>> Mike
>
> http://www.povray.org/documentation/view/3.6.1/378/
> ?
>



I have three separate functions for R, G and B.

#declare convertLCH2RGB_R = function(L,C,H) 
{correctRGB1(funcXYZ2RGBb1(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb2(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb3(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))))}
#declare convertLCH2RGB_G = function(L,C,H) 
{correctRGB2(funcXYZ2RGBb1(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb2(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb3(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))))}
#declare convertLCH2RGB_B = function(L,C,H) 
{correctRGB3(funcXYZ2RGBb1(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb2(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))),funcXYZ2RGBb3(funcLAB2XYZb1(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb2(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H)),funcLAB2XYZb3(funcLCH2LABa1(L,C,H),funcLCH2LABa2(L,C,H),funcLCH2LABa3(L,C,H))))}

Actually, I can create a pigment already. But I don't know how to use 
the functions in a isosurface or a parametric to make the 3D object the 
pigment gets applied to, if possible.

Mike


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