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// Shader      : Texture Tiling OSL shader
// Author      : Hayssam Keilany
//
// Description :
//
// Meant to "break" the repeating patterns on textures
// Very simple version, could be improved by anyone if they feel like it :)
 
// REMINDER : YOU NEED TO USE "OSL UV" IN THE PROJECTION NODE
 
#include <octane-oslintrin.h>
 
color dissolve(color tex1, color tex2, float mix, float noisescale)
{
    float rnd = noise("noise", P * noisescale);
    color c;
 
    if(rnd < mix)
        c = tex2;
    else
        c = tex1;
       
    return c;
}
 
shader Texture_Tiling
(
  color texinput = color(1,1,1)
  [[string label = "Input (Texture)"]],
 
  float scale=4.0
  [[string label = "Tiling Scale", float min=0.0, float sliderexponent=4,float max=10]],
 
  int pixelate = 1
  [[string label = "Enable Pixelation",string widget = "boolean"]],
 
  int blurmode = 0
  [[string label = "Enable Blur Mode",string widget = "boolean"]],
 
  float blursize = 0.5
  [[string label = "Blur Size",float min = 0.0, float sliderexponent=4, float max=1]],
 
  float noisescale = 6
  [[string label = "Noise Size",float min = 0.0, float sliderexponent=4, float max=100]],
 
  output color c=0  
)
{  
  float u_tile; float v_tile;
 
  // "pixelize" the texture
  if (pixelate)
  {
      u_tile = floor(u * scale);
      v_tile = floor(v * scale);
  }
  else
  {
      u_tile = u;
      v_tile = v;
  }
  // offset it
  // can be changed to "cell" but voronoi looks more natural
  float u_jit = noise("voronoi", u, v_tile * scale + v_tile);  
  float v_jit = noise("voronoi", v, u_tile * scale + u_tile);
 
  // add with untouched UV
  float xoffset = u + u_jit;  
  float yoffset = v + v_jit;
 
  // declare the textures to blur
  color tex1 = _evaluateDelayed(texinput, xoffset           , yoffset           );  
  color tex2 = _evaluateDelayed(texinput, xoffset+blursize  , yoffset           );  
  color tex3 = _evaluateDelayed(texinput, xoffset           , yoffset + blursize);  
  color tex4 = _evaluateDelayed(texinput, xoffset - blursize, yoffset - blursize);  
 
  // choose between dissolve or blur
  if (blurmode) c = (tex1 + tex2 + tex3 + tex4) / 4;
  else
  {
      color c1 = dissolve(tex1, tex2, 0.5, noisescale);
      color c2 = dissolve(c1  , tex3, 0.5, noisescale);
      c        = dissolve(c2  , tex4, 0.5, noisescale);
  }
}