TurbulentColor - 图1

    1. /*
    2.  * TurbulentColor.osl by elbrujodelatribu (c)2013
    3.  * from https://github.com/sambler/osl-shaders
    4.  * Modified 04.02.2021 by Saul Espinosa for Redshift 3d
    5.  * original script from -
    6.  * http://elbrujodelatribu.blogspot.com.au/2013/05/blender-cycles-osl-color-turbulence.html
    7.  * based on work from
    8.  * http://glsl.heroku.com/e#8664.0
    9.  * This file is licensed under Apache 2.0 license
    10.  */
    13. shader TurbulentColor
    14. [[  string help = "Turbulent Color Noise",
    15.     string label = "Turbulent Color" ]]
    16. (
    17.     vector Vector = P,
    18.     float Scale = 5
    19.     [[
    20.     float min = 0, float max = 25
    21.     ]],
    22.     float Time = 1.0
    23.     [[
    24.     float min = 0, float max = 100
    25.     ]],
    26.     int MaxIterations = 64
    27.     [[
    28.     int min = 1, int max = 100
    29.     ]],
    31.     output color Color = 0.8)
    32. {
    33.     vector p = Vector * Scale;//surfacePosition;
    35.     for(int i=1; i < MaxIterations; i++)
    36.     {
    37.         vector newp = p;
    38.         newp[0]+=0.6/float(i)*sin(float(i)*p[1]+Time/20.0+0.3*float(i))+20.0;
    39.         newp[1]+=0.6/float(i)*sin(float(i)*p[0]+Time/20.0+0.3*float(i+10))-5.0;
    40.         p=newp;
    41.     }
    43.     Color = color(sin(Time+p[1]+p[0]-M_PI*color(0,2,4)/(4.0+sin(Time)))*0.3+0.5);
    44. }