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#include <voptype.h>
#include <voplib.h>

//noise controls
vector freq = chv("Frequency");   // (1,1,1)
vector offset = chv("Offset");    // (0,0,0)
int turb = chi("Turbulence");     // 5
float amp = chf("Amplitude");     // 1
float rough = chf("Roughness");   // 0.5
float atten = chf("Attenuation"); // 1


string attributeName = chs("attribName");
int countVal = nuniqueval(0, "point", attributeName);

for(int k = 0; k<countVal; k++)
{
  int attrib = uniqueval(0, "point", attributeName, k);
  vector centroid = 0;
  int count = findattribvalcount(0, "point", attributeName, attrib);
  int points [];
  for(int i =0; i<count; i++)
  {
    int ptnum = findattribval(0, "point", attributeName, attrib, i);
    vector pos = point(0, "P", ptnum);
    centroid += pos/(float)count;
    push(points, ptnum);
  }
  
  foreach(int point; points)
  {
    vector pos = point(0, "P", point);
    vector normal = point(0, "N", point);
    int id = point(0, "id", point);
    vector noise = anoise(pos*freq - offset, turb, rough, atten) * amp;             // range (0, 1) *amp
    
    vector randScale = fit01(rand(id),0.2,1);
    vector randNoise = (pos*normal*noise);
    
    pos-=centroid;
    pos*=chf("scale");//*randScale;
    pos+=randNoise;
    
    pos+=centroid;
    setpointattrib(0, "P", point, pos);
  }
}